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Zani, Rahma, Afrizal Tanjung, and Elizal Elizal. "BIVALVE COMMUNITY STRUCTURE IN THE INTERTIDAL ZONE OF PASUMPAHAN ISLAND PADANG CITY WEST SUMATERA PROVINCE." Asian Journal of Aquatic Sciences 6, no. 2 (August 2, 2023): 168–73. http://dx.doi.org/10.31258/ajoas.6.2.168-173.
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Bivalvia is a class of the Mollusca phylum. Bivalvia is also known as Pelecypoda and Lamellibrankhiata. Bivalvia occupies an area of the intertidal zone, one of which is in the intertidal zone of Pasumpahan Island. But information about bivalves in the area does not exist. To know/understand information about the density and distribution pattern of bivalves on Pasumpahan Island, this research was conducted in January 2022. The sampling area was in the intertidal zone of Pasumpahan Island. Sampling was carried out at three stations, each station was divided into three transects. Bivalve sampling was carried out using a 1 x 1mm sieve. The movement of bivalves to the gravel substrate is very fast to avoid splashing waves. Bivalves samples were then identified. The density of bivalves in the intertidal zone of Pasumpahan Island ranged from 1.78-3.56 Ind/m2. Station 2 has a higher density of bivalves, namely 3.56 Ind/m2, the calculation of bivalves in the intertidal zone of Pasumpahan Island obtained bivalves distribution pattern data in groups
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Suryono, Chrisna Adhi, Agus Sabdono, and Subagiyo Subagiyo. "Bioakumulasi Arsen (As) dan Merkuri (Hg) pada Bivalvia dari Pesisir Sekitar Demak dan Surabaya Indonesia." Jurnal Kelautan Tropis 22, no. 2 (November 2, 2019): 157. http://dx.doi.org/10.14710/jkt.v22i2.6257.
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The coastal waters at Demak and Surabaya as areas for fishing ground bivalve for consumption proposes. Unfortunately, mostly the coastal land these areas were used for industry and settlement, it will have an impact on the coastal environment. Heavy metal is one of aspect on coastal environments will give impact, especially on bivalves. This study aims to determine the metal As and Hg in several of bivalves tissue, seawater, sediments and bioaccumulation factors in the of Demak and Surabaya coastal waters. The analysis of As and Hg content in bivalves tissue, sediments and seawater using ICPMS. The results showed bivalves, sediments and seawater samples were found As and Hg concentrations. The highest concentration of As was found in the sediments; meanwhile the highest Hg concentration was found in the bivalve tissue of P. attenuatus > A. pectinata > A.inaequivalvis > A. granosa > P. viridis > P. undulada > M. hiantina respectively. The BAF bioaccumulation factor a significant difference p = 0.021 and the BSAF sediment bioaccumulation factor showed a very highly significant difference p = 0.009. The concentration of As, Hg and bioaccumulation factors in the two fishing ground bivalves areas shows a difference. Pesisir sekitar Demak dan Surabaya merupakan daerah fishing ground berbagai jenis bivalvia untuk dikonsumsi. Namun sekarang pesisir daratan sebagian besar dimanfaatkan untuk industri dan pemukiman hal tersebut akan memberi dampak pada lingkungan pesisir. Logam berat merupakan salah satu aspek yang memberi dampak pada linkungan pesisir terutama pada bivalvia. Penelitian ini bertujuan mengetahui logam As dan Hg yang terdapat dalam jaringan beberapa jenis bivalvia, air laut, sedimen serta faktor bioakumulasi di pesisir Demak dan Surabaya. Analisa kandungan As dan Hg dalam jaringan bivalvia, sedimen dan air laut menguunakan ICPMS. Hasil penelitian menunjukan sampel bivalvia, sedimen dan air laut ditemukan As dan Hg. Konsentrasi As tertinggi ditemukan dalam sedimen, sedangkan konsentrasi Hg tertinggi ditemukan dalam jaringan bivalvia secara berurutan P. attenuatus > A. pectinata > A.inaequivalvis > A. granosa > P. viridis > P. undulada > T. timorensis. Adanya perbedaan yang nyata p=0.021 terhadap faktor bioakumulasi BAF dan faktor bioakumulasi sedimen BSAF menunjukan perbedaan yang sangat nyata p = 0.009. Konsentrasi As, Hg dan faktor bioakumulasi di kedua daerah fishing ground bivalvia menunjukan adanya perbedaan.
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Rahmantyah, Sri Samira. "Studi Komparasi Kuantitas Bivalvia pada Zona Intertidal di Pantai Ntana Kabupaten Bima sebagai Upaya Penyusunan Brosur Konservasi." Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan 3, no. 2 (April 15, 2023): 70–93. http://dx.doi.org/10.36312/panthera.v3i2.164.
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Bivalves belong to the Phylum mollusca. Bivalve are found and live in the Intertidal area. Ntana Beach is the easiest area and has the most interaction with human activities, because this area is a transitional area between aquatic ecosystems and land ecosystems. This study aims to: 1) identify the types of bivalves that make up the Intertidal zone on the Ntana coast, Bima Regency; 2) analyzing the abundance, diversity index, and evenness of Bivalvia in the Intertidal zone on the Ntana coast, Bima Regency; 3) describe the population of bivalve species that dominate the Intertidal zone on the Ntana coast, Bima Regency; 4) analyzing the abundance of bivalves in the sandy, muddy and rocky substrate areas on the Ntana beach, Bima Regency; 5) analyzing the diversity of bivalve species in the area of sandy substrate, muddy substrate, and coral substrate on the Ntana beach, Bima Regency; 6) knowing the differences in the dominance of Bivalvia in the sandy, muddy and rocky substrate areas on the Ntana beach, Bima Regency; and 7) to develop research results on a comparative study of the quantity of bivalves in the intertidal zone on the Ntana coast, Bima district as an effort to prepare a conservation brochure. This type of research is descriptive comparative. Sampling used a 1x1 M plot. The results showed that as many as 540 individual bivalves consisting of 15 species were found on the Ntana beach, Bima district. 15 species of bivalves found include Anadara antiquata, Anadara granosa, Anadara brasilliana, Panopea generosa, Fausta pultenei, Dosina crebra, Eurytellina alternate, Dosina discus, Nactula acuta, Gafrarium divaricatum, Dosinia exoleta, Caestoderma edule, Gafrarium disparm, Cyclocardia ventricosa, and Crassostrea gigas. The abundance on sandy and silty substrates is categorized as moderate, whereas on coral substrates it is categorized as low. Species diversity on rocky substrates is less, whereas on muddy and sandy substrates each has a fairly high level of species diversity. The evenness value on sandy and muddy substrates is close to zero (0), so that the evenness of Bivalvia species on both substrates is not evenly distributed. There are no species that dominate other species because D <0.5. The average value of the brochure validation test is 75.4%, with this result, the brochures that have been compiled are in the good category and do not need to be revised.
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Utari, Enggar, Hartanto Sanjaya, Mahrawi Mahrawi, Indria Wahyuni, Pipit Marianingsih, and Ita Nurlaita. "Mangrove Land Mapping and the Potential for Bivalve Diversity with Remote Sensing in the Pulau Dua Nature Reserve (As an Initial Study for the Development of Class X High School Ecosystem Biology Subconcept Learning Devices)." Edumaspul: Jurnal Pendidikan 7, no. 2 (October 1, 2023): 2384–97. http://dx.doi.org/10.33487/edumaspul.v7i2.6639.
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Bivalvia is an invertebrate animal that has a high level of diversity and a marine biological resource that has significant economic value. This research was conducted in November 2021, aiming to determine bivalve diversity, mapping of manrove land and the potential for bivalve diversity, the relationship between the results of analysis of the presence of water on bivalves diversity in the Pulau Dua Nature Reserve and the implications of research results in the field of education. The method used is the roaming method to determine bivalves diversity and remote sensing methods to map areas of potential bivalve diversity in Pulau Dua Nature Reserve. The results of observations found that the diversity of bivalves in Pulau Dua Nature Reserve was included in the medium diversity category with a value of 1.085. The results of the relationship between bivalve diversity and MNDWI are classified as having a strong relationship, namely the correlation coefficient (r) is 0.668. In the Pulau Dua Nature Reserve, it was found that areas with a high potential for bivalve diversity were found at coordinates 106.198956 6.018374. The results of this research were then carried out to analyze the material at KD 3.10 and KD 4.10 for class X SMA at school.
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Schneider, Jay A. "Bivalve systematics during the 20th century." Journal of Paleontology 75, no. 6 (November 2001): 1119–27. http://dx.doi.org/10.1017/s0022336000017170.
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Over the past 75 years, the higher-level taxonomy of bivalves has received less attention than that of their fellow molluscs, gastropods. The publication of the bivalve volumes of the Treatise on Invertebrate Paleontology in 1969 was not followed by an explosion of study into the evolution of bivalves; rather, with only one or two exceptions, bivalve workers were noticeably absent from the cladistic and molecular revolutions that were taking place during the 1970s and 1980s, even as gastropods received considerable attention. Over the past ten years, cladistics and molecular systematics have begun to be applied to solve problems of bivalve evolutionary biology. These studies, most of which have been undertaken by paleontologists, have halted the stagnation in bivalve systematics. Bivalve systematics looks to have an exciting future, as the excellent fossil record of the Bivalvia will be used in conjunction with cladistics and molecular systematics to solve problems in not just bivalve evolution but evolutionary biology in general.
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MARIN, IVAN, and GUSTAV PAULAY. "Pinnotherotonia rumphiusi gen. et sp. nov., a new furry bivalve-associated pontoniine shrimp (Crustacea: Decapoda: Palaemonidae) from Palau." Zootaxa 2636, no. 1 (October 5, 2010): 37. http://dx.doi.org/10.11646/zootaxa.2636.1.3.
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A new genus and species of a furry, bivalve–associated pontoniine shrimp is described from Palau. This is the second pontoniine shrimp known to be associated with bivalves burrowing into soft bottom, and the first record of a venus clam (Bivalvia, Veneridae) as host for caridean shrimps.
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Aouissi, Riadh, Sihem Salmi-Laouar, Gamal M. El Qot, and El Sayed M. Moneer. "Cenomanian bivalves from Batna Mountains (Saharan Atlas, NE Algeria)." Revista Brasileira de Paleontologia 25, no. 4 (December 31, 2022): 255–73. http://dx.doi.org/10.4072/rbp.2022.4.02.
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In the Batna Mountains, the Cenomanian Marnes de Smail Formation yield fossiliferous deposits mostly dominated by bivalves. Thirty-five bivalve species were identified, belonging to nine orders, 19 families and 26 genera. Five of them are mentioned for the first time from the Cenomanian of the study area (i.e., Nucula ? cf. margaritifera Douvillé, Barbatia (Barbatia) aegyptiaca Fourtau, Cucullaea trigona Seguenza, Arctica inornata d’Orbigny, and A. cordata Sharpe). Their distribution provided interesting insights on the marine paleoenvironment of the Cenomanian times. The paleobiogeographic distribution of the studied bivalves corresponds to the Tethys Realm. Keywords: Bivalvia, Cretaceous, Cenomanian, Algeria, Batna, Tethys
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Annisa, Annisa, Try Febrianto, and Aditya Hikmat Nugraha. "Struktur Komunitas Bivalvia pada Ekosistem Lamun dengan Tutupan Berbeda di Perairan Pulau Bintan." Buletin Oseanografi Marina 13, no. 1 (December 28, 2023): 41–51. http://dx.doi.org/10.14710/buloma.v13i1.52048.
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Ekosistem lamun memiliki kaitan yang erat dengan keberadaan bivalvia. Kondisi struktur ekosistem lamun yang berbeda-beda di Perairan Pulau Bintan diduga dapat berpengaruh terhadap asosiasi bivalvia pada ekosistem lamun. Penelitian ini bertujuan untuk mendeskripsikan struktur ekosistem lamun dan mempelajari struktur asosiasi bivalvia pada beberapa ekosistem lamun di Pesisir Pulau Bintan. Terdapat 4 stasiun pengamatan yang diamati pada penelitian ini. Penentuan lokasi penelitian berdasarkan keterwakilan sebaran ekosistem lamun di Pulau Bintan, dengan kondisi tutupan lamun yang berbeda, yaitu meliputi: Dompak, Pengudang, Teluk Bakau dan Pengujan. Metode sampling menggunakan transek kuadrat yang dipadukan dengan 3 buah transek garis sepanjang 100 m ke arah laut. Diperoleh 7 jenis lamun yang tersebar di 4 lokasi penelitian. Tutupan lamun tertinggi terdapat di Pesisir Pengudang dengan nilai tutupan sebesar 66.1%. Ditemukan 28 spesies bivalvia dengan nilai kepadatan tertinggi yaitu Gafrarium pectinatum. Hasil analisis PCA menunjukkan bahwa tutupan lamun memiliki keterikatan dengan kepadatan bivalvia. Beberapa bivalvia memiliki kecenderungan untuk hidup pada vegetasi lamun tertentu. Seagrass ecosystems have a close relationship with the existence of bivalves. The different structural conditions of the seagrass ecosystem in the waters of Bintan Island are thought to influence the association of bivalves in the seagrass ecosystem. This study aims to describe the structure of seagrass ecosystems and study the structure of bivalve associations in several seagrass ecosystems on the coast of Bintan Island. There are four observation stations observed in this study. The determination of the research location was based on the representation of the distribution of seagrass ecosystems on Bintan Island, with different seagrass cover conditions, including: Dompak, Pengudang, Bakau Bay and Pengujan. The sampling method uses a quadratic transect combined with 3 line transects along 100 m seaward, obtaining 7 types of seagrasses scattered in 4 research locations. The highest seagrass cover was found in Pengudang Coastal Area, with a cover value of 66.1%. Found 28 species of bivalves with the highest density value, namely Gafrium pectinatum. PCA analysis results show that seagrass cover has an attachment to the density of bivalves. Some bivalves tend to live on specific seagrass vegetation.
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Eddy, La, Rezki Amalia Riandini, and Mechiavel Moniharapon. "HISTOLOGI JARINGAN MANTEL TIRAM (SAIBO) PADA BEBERAPA JENIS BIVALVIA SEBAGAI ALTERNATIF IMPLANTASI MUTIARA." Jurnal Pendidikan Matematika dan IPA 10, no. 1 (January 30, 2019): 128. http://dx.doi.org/10.26418/jpmipa.v10i1.27629.
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All types of bivalves have the potential to produce pearls. Pearls can be produced naturally and cultivated. In cultured pearls, pearl sac are obtained from saibo (slices of another bivalve mantle) that which come from pallial zone. This study wants know the structures of tissues saibo of several species of bivalves as an alternative pearls implantation. This study is conducted from January to March 2017. This study used 7 types of bivalves among others; Pinctada margaritifera, Saccostrea cucullata, Asaphis violascens, Polymesoda bengalensis, Pinna muricata, Volachlamys singaporina, and Tridacna crocea. The method used by staining Hematoxylin-Eosin. Thisstudy show results that every saibo has the different characteristic, but has a common characteristic of having outer epithelium mantle, inner epithelium mantle, muscle fibers, connective tissue and longitudinal muscle, so it can be recommended in pearls implantation Keywords : Saibo, Bivalvia, Implantasi Mutiara[H1] [H1]Disusun berdasarkan abjad
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Hariani, Indri, Abdul L. Mawardi, and T. Hadi Wibowo Atmaja. "KARAKTERISTIK MORFOMETRIK BIVALBIA DI KAWASAN PADAT INDUSTRI DI PESISIR LANGKAT SUMUTRA UTARA." JURNAL BIOSENSE 7, no. 01 (June 18, 2024): 50–58. http://dx.doi.org/10.36526/biosense.v7i01.3565.
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The coastal area of Pangkalan Susu is a place with diverse marine biota. Apart from being a spawning place and source of nutrition, coastal areas are also a source of food for various marine biota, including gastropods and bivalves Morphometry is the size or comparison of external body size between one part and another. This research was carried out in September 2023 on the coast of Pangkalan Susu, Langkat Regency. Sampling was carried out in plots. Bivalves are grouped into 3 length classes, namely small size (1.0 cm – 2.0 cm), medium size (2.1cm – 3.0 cm), large size (>3.1cm). Based on the collection of bivalve species at each location, 3 species of bivalves were obtained. The 3 species of bivalves obtained were Anadara granosa, Placuna placenta and Atrina pectinata. All bivalve species are large in size. Morphometrics of the three bivalve species showed that location 1 showed higher values compared to location 1 in terms of length, width and weight. Key words: Bivalves; Morphometrics; Pangkalan Susu.
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Erniati, Erniati, Yudho Andika, Imanullah Imanullah, Imamshadiqin Imamshadiqin, Salmarika Salmarika, Elva Dwi Yulistia, Rafly Lazuardi, and Sanja Maulana. "Keanekaragaman Bivalvia Di Perairan Kabupaten Aceh Utara." Buletin Oseanografi Marina 13, no. 1 (December 28, 2023): 52–62. http://dx.doi.org/10.14710/buloma.v13i1.53099.
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Kabupaten Aceh Utara memiliki potensi sumberdaya hayati laut yang melimpah salah satunya adalah bivalvia. Sebagai langkah awal dalam pengelolaan dan pemanfaatan potensi bivalvia di wilayah Kabupaten Aceh Utara maka perlu dilakukan penelitian terkait dengan keanekaragaman dan kepadatan bivalvia. Tujuan penelitian untuk melihat keanekaragaman dan pola sebaran bivalvia di Perairan Kabupaten Aceh Utara. Penelitian dilaksanakan pada bulan Juli - Agustus 2022 di perairan Kabupaten Aceh Utara. Metode yang digunakan adalah purposive sampling dengan plot 1 x 1 m dengan analisis PCA dan cluster. Hasil penelitian melaporkan ditemukan 7 jenis bivalvia di Kabupaten Aceh Utara yaitu Geloina erosa, Donax cuneatus, Crassostrea sp1., Crassostrea sp2., Maretrix sp., Donax faba, dan Anadara granosa. Keanekaragaman bivalvia di Kabupaten Aceh Utara tergolong rendah berkisar 0 – 0,67. Ada jenis yang mendominasi dengan kepadatan tertinggi yaitu jenis A. granosa yaitu sebesar 23 Ind/m2. Kepadatan tertinggi bivalvia ditemukan pada Kecamatan Syamtalira Bayu yaitu sebesar 19 Ind/m2. Karakteristik kualitas perairan masih dalam rentang baku mutu untuk kelangsungan kehidupan biota laut. A. granosa telah dimanfaatkan oleh masyarakat Aceh Utara untuk dijual atau dikonsumsi sendiri. Untuk mengatasi masalah eksploitasi secara berlebihan maka perlunya pengelolan sumberdaya kerang ini untuk pemanfaatan secara berkelanjutan. North Aceh District has abundant marine biological resource potential, one of which is bivalves. As a first step in the management and utilization of the potential of bivalves in the North Aceh district, it is necessary to carry out research related to the diversity and density of bivalves. The aim of the study was to look at the diversity and distribution patterns of bivalves in the waters of North Aceh District. The research was carried out in July - August 2022 in the waters of North Aceh Regency. The method used was purposive sampling with a 1 x 1 m plot with PCA and cluster analysis. The results of the study reported that there were 7 types of bivalves in North Aceh District, namely Geloina erosa, Donax cuneatus, Crassostrea sp1., Crassostrea sp2., Maretrix sp., Donax faba, and Anadara granosa. Bivalve diversity in North Aceh District is low, ranging from 0 to 0.67. There is a type that dominates with the highest density, namely A. granosa, which is 23 Ind/m2. The highest density of bivalves was found in Syamtalira Bayu District, which was 19 Ind/m2. Characteristics of water quality are still within the range of quality standards for the survival of marine biota. A. granosa has been used by the people of North Aceh for sale or self-consumption. To overcome the problem of overexploitation, it is necessary to manage these shellfish resources for sustainable use.
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Suheriyanto, D., E. A. Ningtyas, and R. Susilowati. "The relationship between mangroves and bivalves abundance in Cengkrong Beach, Trenggalek Regency." IOP Conference Series: Earth and Environmental Science 1312, no. 1 (February 1, 2024): 012003. http://dx.doi.org/10.1088/1755-1315/1312/1/012003.
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Abstract Cengkrong Beach in Trenggalek Regency has extensive mangrove forest. Mangrove forests play an important role in maintaining aquatic productivity and supporting people’s lives. Bivalve is one of the biota that lives in mangroves and is used by the people around the mangrove forest. The research aims to identify mangroves and bivalves, analyze the abundance of mangroves and bivalves, and determine the relationship between mangroves and bivalves. Mangrove sampling was carried out on 6 transects. Each transect was made 7 with plots measuring 10 m x 10 m with a distance of 5 m and bivalve samples were taken using a 1 m x 1 m plot with 5 plots in that plot. Research data were analyzed using PAST 4.13. The results of the study found 15 species of mangroves and 4 genera of bivalves. The highest mangrove abundance value was Rhizophora apiculata with a value of 0.0092 indiv./m2 and bivalves were of the genus Isognomon with a value of 4.138 indiv./m2. The results of the analysis showed that there was a relationship between the mangrove Sonneratia caseolaris and the bivalve of genus Pilsbryoconcha, the mangrove Aegiceras floridum and the bivalve of genus Geloina, the mangrove Avicennia alba and the bivalve of genus Saccostrea and the mangrove R. apiculata and the bivalve of genus Isognomon.
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Febrina, Mutiara, Wahyu Adi, and Arief Febrianto. "KELIMPAHAN BIVALVIA DI EKOSISTEM LAMUN PANTAI PUDING KABUPATEN BANGKA SELATAN." Akuatik: Jurnal Sumberdaya Perairan 12, no. 2 (November 15, 2018): 64–75. http://dx.doi.org/10.33019/akuatik.v12i2.702.
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Puding Beach is administratively located in Pasir Putih Village, Tukak Sadai District, South Bangka Regency. As a coastal area, Puding Beach holds natural resource potential in both marine tourism and biota diversity. This study aims to analyze the abundance and distribution of bivalves and the seagrass beach community structure. This research was conducted in March 2018. The research method used was purposive sampling. Whereas for analysis of water quality characteristics and bivalve abundance, use main component analysis (Principle component analysis / PCA). The results showed that there were 6 species of seagrass and 7 species of bivalves at all stations. Each station I, II and III is dominated by the bivalve type Gafrarium tumidium with different seagrass species density. The highest density of seagrass species at stations I, II and III were Halodule uninervis (141 ind / m), Enhalus acoroides (7 ind / m) and Cymodocea serrulata (38 ind / m). Based on the analysis of main components can be seen the description of the condition to research location and can be seen the correlation between the existing bivalve abundance and the condition of the waters in all the research stations described in the F1-F2 factorial field. Important information on the main component axis is centered on the 2 main axes F1 (82.38%) and F2 (4.62%) of the total percentage. Bivalvia distribution analysis at Puding Beach is uniform and clustered based on habitat characteristics and environmental parameters that influence the life of bivalves
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Harefa, M. S., Z. Nasution, E. Tuhono, A. Susilowati, and W. Wulandari. "Diversity of bivalve and gastropod species in mangrove restoration areas." IOP Conference Series: Earth and Environmental Science 1352, no. 1 (May 1, 2024): 012062. http://dx.doi.org/10.1088/1755-1315/1352/1/012062.
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Abstract Bivalvia and gastropods are two types of mollusks found in mangrove habitats. This group of mollusks performs a vital function in their environment, including serving as a biofilter and decomposing organic waste. The abundance of bivalves and gastropods in their natural environment is presumed to have been impacted by deforestation and restoration processes in mangrove ecosystems. Therefore, this study was conducted to collect information about the composition and variety of bivalves and gastropods in the mangrove restoration area of Bagan Serdang village in North Sumatra. This research was conducted using the plot method with a plot size of 2m x 2m. Observation plots are created along specified paths with alternate placements. According to the findings, up to 19 types of mollusks were discovered at the study site. This investigation discovered 14 snail species and 10 gastropod families. The other five species are Bivalvia from four different families. M. strigata has the greatest density of 0.26 and the highest relative density of 3.90%. At the study site, the bivalve and gastropod diversity index was moderate (2.127), the evenness index was high (0.722), and the dominance index was low (0.211). It is highly recommended to continue to promote vegetation species at the study location in order to improve bivalves and gastropod species and numbers.
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Suryono, Chrisna Adhi, Agus Sabdono, and Subagiyo Subagiyo. "Kontaminasi Residu Pestisida Organoposfat: Klorpirifos, Fenitrotion dan Profenofos dalam Bivalvia yang Ditangkap di Pesisir Utara Pulau Jawa." Jurnal Kelautan Tropis 22, no. 2 (November 2, 2019): 103. http://dx.doi.org/10.14710/jkt.v22i2.6274.
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Organophosphate pesticides were widely used in agriculture and OPP which was less accumulative and degradable but It has been found in an aquatic environment. The purpose of this study was to determine the level of organophosphate pesticide residues in bivalve which was fishing in North Coast of Java specifically the Demak and Surabaya. Bivalvia, sediment and seawater samples were analysed using GC-MS. The results showed that the bivalves of A inaequivalvis, P viridis, A pectinata captured in Demak and Surabaya were contaminated with organophosphate pesticide of chlorpyrifos, fenitrothion and profenofos. The chlorpyrifos was found in all species of bivalves, but the highest concentrations of OPP were profenophos> chlorpyrifos > fenitrothion respectively. ANOVA test results show that there was a very significant difference in OPP residues in bivalves p = 0.009, but there was no difference in OPP residues between locations.Organoposfat pestisida (OPP) banyak digunakan secara meluas dalam pertanian dan OPP tersebut kurang akumulatif dan mudah terurai namun keberdaanya telah di temukan dala lingkungan perairan. Tujuan dari penelitian adalah untuk mengetahui tingkat akumulasi residu pestisida organoposfat yang terdapat di bivalvia yang ditangkap di pesisir Utara Jawa khususnya wilayah Demak dan Surabaya. Sampel bivalvia, sedimen dan air laut dianalisa menggunakan GC-MS. Hasil penelitian menunjukan bahwa bivalvia A inaequivalvis, P viridis, A pectinata yang ditangkap di Demak dan Surabaya terkontaminasi pestisida organoposfat jenis Klorpirifos, Fenitrotion dan Profenofos. Klorpirifos ditemukan pada semua bivalvia, namun konsentrasi tertinggi OPP secara berurutan profenofos > klorpirifos > fenitrotion. Hasil uji ANOVA menunjukan adanya perbedaan yang sangat nyata residu OPP dalam bivalvia p= 0.009, namun tidak ada berbedaan residu OPP antar wilayah lokasi.
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Erika, Adelia, Mu'alimah Hudatwi, and Irma Akhrianti. "Identifikasi Jenis Bivalvia Pada Ekosistem Mangrove Di Sekitar Perairan Kota Pangkalpinang." Journal of Marine Research 11, no. 4 (September 1, 2022): 695–705. http://dx.doi.org/10.14710/jmr.v11i4.34036.
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Hutan mangrove merupakan salah satu ekosistem pesisir yang memiliki produktivitas yang tinggi sehingga dapat memberikan kontribusi yang besar terhadap biota yang hidup didalamnya, salah satunya yaitu bivalvia. Secara ekologis mangrove berfungsi sebagai daerah asuhan, tempat mencari makan, dan pemijahan bagi bivalvia. Penelitian ini bertujuan untuk mengetahui jenis bivalvia yang ditemukan pada ekosistem mangrove, mengetahui nilai indeks ekologi bivalvia, serta mengetahui hubungan antara bivalvia dengan kerapatan mangrove dan parameter lingkungan. Penelitian ini dilaksanakan pada bulan Februari-April 2021 di empat stasiun yang berbeda yaitu Pantai Tanjung Bunga, Muara Serata Pasir Padi, Pantai Koala Jembatan Emas, dan Pelabuhan Pangkal Balam. Pengambilan data dalam penelitian ini menggunakan metode line transect yang ditarik dari arah laut ke darat, kemudian diletakkan tiga plot transek dengan ukuran 10x10m yang berbentuk zig-zag dengan ulangan 9 plot transek mangrove yang terdiri dari 3 sub stasiun pengamatan. Hasil penelitian menunjukkan bahwa ditemukan bivalvia sebanyak 472 individu dari 23 spesies dan 9 family. Nilai indeks keanekaragaman tertinggi terdapat pada stasiun 3 yaitu 3,187. Indeks keseragaman tertinggi terdapat pada stasiun 4 dengan total nilai 0,267. Indeks dominansi nilai tertinggi terdapat pada stasiun 2 yaitu 0,405. Hasil analisis komponen utama (Principal Component Analysis) menunjukkan bahwa nilai hubungan keanekaragaman bivalvia dengan nilai kerapatan mangrove pada penelitian ini menunjukkan hubungan korelasi positif yang dengan nilai r = (0,57). Sedangkan, faktor fisika-kimia yang mempengaruhi keanekaragaman bivalvia adalah salinitas dengan nilai r = (0,95) dan pH dengan nilai r = (0,94). Mangrove is one of the coastal ecosystems with has high productivity for major contribution to the biota that live in it, one of which is bivalves. Ecologically, mangroves function as nursery ground, feeding ground and spawning ground for bivalves. This study aims to determine the type of bivalves found in mangrove ecosystems, to determine the value of the ecological index of bivalves, and to determine the relationship between bivalves and mangrove density and environmental parameters. This research was carried out in February-April 2021 at four different stations, namely Tanjung Bunga Beach, Muara Serata Pasir Padi, Golden Bridge Koala Beach, and Pangkal Balam Port. Data retrieval in this study used the line transect method which was drawn from the sea to the land, then three transect plots with a size of 10x10m in a zig-zag shape were placed with 9 replications of mangrove transect plots consisting of 3 sub-stations of observation. The results showed that there were 472 individuals of bivalves from 23 species and 9 families. The highest diversity index value is found at station 3, which is 3,187. The highest uniformity index is at station 4 with a total value of 0.267. The highest value dominance index is found at station 2, which is 0,405. The results of the principal component analysis (Principal Component Analysis) show that the value of the relationship of bivalve’s diversity with the value of mangrove density in this study shows a strong positive correlation with the value of r = (0,57). Meanwhile, the physico-chemical factors that affect the diversity of bivalves are salinity with a value of r = (0,95) and pH with a value of r = (0,94).
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Miller, Arnold I., and J. John Sepkoski. "Modeling bivalve diversification: the effect of interaction on a macroevolutionary system." Paleobiology 14, no. 4 (1988): 364–69. http://dx.doi.org/10.1017/s0094837300012100.
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The global diversification of the class Bivalvia has historically received two conflicting interpretations. One is that a major upturn in diversification was associated with, and a consequence of, the Late Permian mass extinction. The other is that mass extinctions have had little influence and that bivalves have experienced slow but nearly steady exponential diversification through most of their history, unaffected by interactions with other clades. We find that the most likely explanation lies between these two interpretations. Through most of the Phanerozoic, the diversity of bivalves did indeed exhibit slow growth, which was not substantially altered by mass extinctions. However, the presence of “hyperexponential bursts” in diversification during the initial Ordovician radiation and following the Late Permian and Late Cretaceous mass extinctions suggests a more complex history in which a higher characteristic diversification rate was dampened through most of the Phanerozoic. The observed pattern can be accounted for with a two-phase coupled (i.e., interactive) logistic model, where one phase is treated as the “bivalves” and the other phase is treated as a hypothetical group of clades with which the “bivalves” might have interacted. Results of this analysis suggest that interactions with other taxa have substantially affected bivalve global diversity through the Phanerozoic.
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Umami, Rizal, and Agil Al Idrus. "Evidence of The Successful Conservation of Enhalus Acoroides in Terms of The Diversity of Bivalves on The Coast of East Lombok." Jurnal Biologi Tropis 23, no. 2 (March 6, 2023): 47–54. http://dx.doi.org/10.29303/jbt.v23i2.4320.
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The existence of seagrass in coastal areas can affect marine biota that live around it. Seagrass has an important role as an area of care, spawning, and protection. This study aims to determine the success of conserving seagrass beds of the Enhalus acorodies species in terms of bivalve diversity on the south coast of East Lombok. The research was conducted using transect and observation methods. The data obtained were analyzed using evenness index, diversity index, and species richness. The results of the study found 10 types of Bivalves in Poton Bako. Bivalves diversity index is included in the medium category of 2,228. The evenness index of bivalves was 0.409 in the low category. Then, the species richness index is 1.653 in the low category. The species diversity of Bivalvia in seagrass beds in Poton Bako is still relatively moderate so that the sustainability of the seagrass species Enhalus acoroides can be said to be maintained. The existence of a feed source or substrate derived from the remains of seagrass is used as a source of feed. The conservation of Enhalus acoroides seagrass needs to be maintained so that it has an impact on the survival and diversity of Bivalves in the area.
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., Sudiyar, Okto Supratman, and Indra Ambalika Syari. "HUBUNGAN KEPADATAN BIVALVIA DENGAN PARAMETER LINGKUNGAN DI PESISIR TANJUNG PURA KABUPATEN BANGKA TENGAH." Akuatik: Jurnal Sumberdaya Perairan 13, no. 2 (June 18, 2020): 112–21. http://dx.doi.org/10.33019/akuatik.v13i2.1434.
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The destructive fishing feared will give a negative impact on the survival of this organism. This study aims to analyze the density of bivalves, distribution patterns, and to analyze the relationship of bivalves with environmental parameters in Tanjung Pura village. This research was conducted in March 2019. The systematic random system method was used for collecting data of bivalves. The collecting Data retrieval divided into five research stasions. The results obtained 6 types of bivalves from 3 families and the total is 115 individuals. The highest bivalve density is 4.56 ind / m², and the lowest bivalves are located at station 2,1.56 ind / m², The pattern of bivalve distribution in the Coastal of Tanjung Pura Village is grouping. The results of principal component analysis (PCA) showed that Anadara granosa species was positively correlated with TSS r = 0.890, Dosinia contusa, Anomalocardia squamosa, Mererix meretrix, Placamen isabellina, and Tellinella spengleri were positively correlated with currents r = 0.933.
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Hsieh, Shannon, Andrew M. Bush, and J. Bret Bennington. "Were bivalves ecologically dominant over brachiopods in the late Paleozoic? A test using exceptionally preserved fossil assemblages." Paleobiology 45, no. 02 (February 28, 2019): 265–79. http://dx.doi.org/10.1017/pab.2019.3.
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AbstractInterpreting changes in ecosystem structure from the fossil record can be challenging. In a prominent example, the traditional view that brachiopods were ecologically dominant over bivalves in the Paleozoic has been disputed on both taphonomic and metabolic grounds. Aragonitic bivalves may be underrepresented in many fossil assemblages due to preferential dissolution. Abundance counts may further understate the ecological importance of bivalves, which tend to have more biomass and higher metabolic rates than brachiopods. We evaluate the relative importance of the two clades in exceptionally preserved, bulk-sampled fossil assemblages from the Pennsylvanian Breathitt Formation of Kentucky, where aragonitic bivalves are preserved as shells, not molds. At the regional scale, brachiopods were twice as abundant as bivalves and were collectively equivalent in biomass and energy use. Analyses of samples from the Paleobiology Database that contain abundance counts are consistent with these results and show no clear trend in the relative ecological importance of bivalves during the middle and late Paleozoic. Bivalves were probably more important in Paleozoic ecosystems than is apparent in many fossil assemblages, but they were not clearly dominant over brachiopods until after the Permian–Triassic extinction, which caused the shelly benthos to shift from bivalve and brachiopod dominated to merely bivalve dominated.
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Sauvey, Aurore, Françoise Denis, Hélène Hégaret, Bertrand Le Roy, Christophe Lelong, Orianne Jolly, Marie Pavie, and Juliette Fauchot. "Interactions between Filter-Feeding Bivalves and Toxic Diatoms: Influence on the Feeding Behavior of Crassostrea gigas and Pecten maximus and on Toxin Production by Pseudo-nitzschia." Toxins 13, no. 8 (August 19, 2021): 577. http://dx.doi.org/10.3390/toxins13080577.
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Among Pseudo-nitzschia species, some produce the neurotoxin domoic acid (DA), a source of serious health problems for marine organisms. Filter-feeding organisms—e.g., bivalves feeding on toxigenic Pseudo-nitzschia spp.—are the main vector of DA in humans. However, little is known about the interactions between bivalves and Pseudo-nitzschia. In this study, we examined the interactions between two juvenile bivalve species—oyster (Crassostrea gigas) and scallop (Pecten maximus)—and two toxic Pseudo-nitzschia species—P. australis and P. fraudulenta. We characterized the influence of (1) diet composition and the Pseudo-nitzschia DA content on the feeding rates of oysters and scallops, and (2) the presence of bivalves on Pseudo-nitzschia toxin production. Both bivalve species fed on P. australis and P. fraudulenta. However, they preferentially filtered the non-toxic Isochrysis galbana compared to Pseudo-nitzschia. The presence of the most toxic P. australis species resulted in a decreased clearance rate in C. gigas. The two bivalve species accumulated DA in their tissues (up to 0.35 × 10−3 and 5.1 × 10−3 µg g−1 for C. gigas and P. maximus, respectively). Most importantly, the presence of bivalves induced an increase in the cellular DA contents of both Pseudo-nitzschia species (up to 58-fold in P. fraudulenta in the presence of C. gigas). This is the first evidence of DA production by Pseudo-nitzschia species stimulated in the presence of filter-feeding bivalves. The results of this study highlight complex interactions that can influence toxin production by Pseudo-nitzschia and accumulation in bivalves. These results will help to better understand the biotic factors that drive DA production by Pseudo-nitzschia and bivalve contamination during Pseudo-nitzschia blooms.
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PONNUSAMI, JAYASRI, and FAZIMAH AZIZ. "Checklist of Molluscs (Gastropoda and Bivalvia) of Malaysia Exclusive Economic Zone (EEZ) in Sarawak Waters." Borneo Journal of Resource Science and Technology 7, no. 2 (December 28, 2017): 111–17. http://dx.doi.org/10.33736/bjrst.597.2017.
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Most of the molluscs studies in Malaysia have focused only on their diversity and the knowledge on their relationship with the water depth are lacking. The hypothesis tested in this research was water depth influence the density of marine gastropods and bivalves of Malaysia Exclusive Economic Zone (EEZ) in Sarawak waters. The aim of the study was to determine the gastropod and bivalve species in Malaysia EEZ of Sarawak waters and the relationship of the species density with water depth. The sampling was conducted from 15th August 2015 until 9th October 2015. The gastropods and bivalves were collected from 32 stations of various depths using the Smith-McIntyre grab. The depth of the stations was from 20 m to 200 m. A total of 95 taxa (61 Gastropoda and 34 Bivalvia) were found in this study. The dominant molluscs species of Sarawak waters in Malaysia EEZ were Limopsis sp., Turitella cingulifera, Pitar citrinus, and Cavolinia globulosa. Species density was about 10 ind./m2 to 610 ind./m2 and the total density was between 250 ind./m2 (Station 22) and 1,940 ind./m2 (Station 2). The total density of gastropods and bivalves showed weak correlation and negative relationship with the depth of water. The findings of this study will aid future studies in Malaysia EEZ.
Keywords: Bivalves, gastropods, Malaysia EEZ, Sarawak waters
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PONNUSAMI, JAYASRI, and FAZIMAH AZIZ. "Supplementary Materials: Checklist of Molluscs (Gastropoda and Bivalvia) of Malaysia Exclusive Economic Zone (EEZ) in Sarawak Waters." Borneo Journal of Resource Science and Technology 7, no. 2 (December 28, 2017): 111–17. http://dx.doi.org/10.33736/bjrst.598.2017.
Full textAbstract:
Most of the molluscs studies in Malaysia have focused only on their diversity and the knowledge on their relationship with the water depth are lacking. The hypothesis tested in this research was water depth influence the density of marine gastropods and bivalves of Malaysia Exclusive Economic Zone (EEZ) in Sarawak waters. The aim of the study was to determine the gastropod and bivalve species in Malaysia EEZ of Sarawak waters and the relationship of the species density with water depth. The sampling was conducted from 15th August 2015 until 9th October 2015. The gastropods and bivalves were collected from 32 stations of various depths using the Smith-McIntyre grab. The depth of the stations was from 20 m to 200 m. A total of 95 taxa (61 Gastropoda and 34 Bivalvia) were found in this study. The dominant molluscs species of Sarawak waters in Malaysia EEZ were Limopsis sp., Turitella cingulifera, Pitar citrinus, and Cavolinia globulosa. Species density was about 10 ind./m2 to 610 ind./m2 and the total density was between 250 ind./m2 (Station 22) and 1,940 ind./m2 (Station 2). The total density of gastropods and bivalves showed weak correlation and negative relationship with the depth of water. The findings of this study will aid future studies in Malaysia EEZ.
Keywords: Bivalves, gastropods, Malaysia EEZ, Sarawak waters
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Rosani, Umberto, Enrico Bortoletto, Chang-Ming Bai, Beatriz Novoa, Antonio Figueras, Paola Venier, and Bastian Fromm. "Digging into bivalve miRNAomes: between conservation and innovation." Philosophical Transactions of the Royal Society B: Biological Sciences 376, no. 1825 (April 5, 2021): 20200165. http://dx.doi.org/10.1098/rstb.2020.0165.
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Bivalves are a diverse mollusc group of economic and ecological importance. An evident resilience to pollution, parasites and extreme environments makes some bivalve species important models for studying adaptation and immunity. Despite substantial progress in sequencing projects of bivalves, information on non-coding genes and gene-regulatory aspects is still lacking. Here, we review the current repertoire of bivalve microRNAs (miRNAs), important regulators of gene expression in Metazoa. We exploited available short non-coding RNA (sncRNA) data for Pinctada martensii, Crassostrea gigas, Corbicula fluminea, Tegillarca granosa and Ruditapes philippinarum , and we produced new sncRNA data for two additional bivalves, the Mediterranean mussel Mytilus galloprovincialis and the blood clam Scapharca broughtonii . We found substantial heterogeneity and incorrect annotations of miRNAs; hence, we reannotated conserved miRNA families using recently established criteria for bona fide microRNA annotation. We found 106 miRNA families missing in the previously published bivalve datasets and 89 and 87 miRNA complements were identified in the two additional species. The overall results provide a homogeneous and evolutionarily consistent picture of miRNAs in bivalves and enable future comparative studies. The identification of two bivalve-specific miRNA families sheds further light on the complexity of transcription and its regulation in bivalve molluscs. This article is part of the Theo Murphy meeting issue ‘Molluscan genomics: broad insights and future directions for a neglected phylum’.
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Erniati, Erniati, Yudho Andika, Imanullah Imanullah, Imamshadiqin Imamshadiqin, Salmarika Salmarika, Cut Meurah Nurul ‘Akla, Elva Dwi Yulistia, Sanja Maulana, and Rafly Lazuardy. "Proximate Composition of Shell (Bivalves) in North Aceh District, Aceh Province Based on Differences in Species and Environmental Characteristics." International Journal of Engineering, Science and Information Technology 3, no. 1 (March 16, 2023): 57–62. http://dx.doi.org/10.52088/ijesty.v3i1.424.
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Shellfish (bivalves) are potential biodiversity of waters with an important significant value used by the community as a food source of highly nutritious animal protein. Based on survey results, several coastal areas in North Aceh District have the potential for shellfish. Still, there have not been any scientific reports on this region's proximate composition of bivalves. This study aims to determine the relative arrangement of the dominant bivalves in the North Aceh District based on species differences and environmental characteristics. The results showed varying proximate bivalve proximate compositions of 4 chief types of shellfish in North Aceh waters. Bivalvia water ranged from 6.9-14.2%, ash ranged from 5.87-8.29%, protein ranged from 32.84-35.87%, fat ranged from 3.04-10.83%, and carbohydrate ranged from 38.11-42.71%. The highest protein and fat content were found in the Crassostrea sp1 type clams. In addition, the differences in the environmental characteristics of the shell sampling locations also resulted in different proximate compositions. The PCA test results showed that the critical variablarrangemente composition was ash and fat content. The environmental parameters, which were the key parameters of the relative arrangement of the shells were the substrate and pH.
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Tony, Frans, Putri Mudhlika Lestarina, Novreza Dita Yorenagea Ilmy, and Rina Iskandar. "The Relationship of Bivalvia Affairs to Mangrove Density in Pt Arutmin Indonesia Kintap Mining Area Mekarsari Village, Tanah Laut Regency South Kalimantan Province." International Journal of Environment, Agriculture and Biotechnology 7, no. 5 (2022): 160–65. http://dx.doi.org/10.22161/ijeab.75.16.
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This research was conducted to determine how strong the effect of mangrove density on the bivalves community in particular in abundance. This research was conducted in March 2022 to April 2022. Data collection is carried out at three stations located at upstream, middle and downstream. Each sample station collected is a bivalves sample and data mangrove observation. Bivalve samples using a 1 mx 1 m transect on the plot observation of mangroves 10 m x 10 m. The results of the study showed that the bivalves found there are 8 types of bivalves, namely; Mactra violacea, Perna viridis, Mactra chinensis, Polymesoda erosa, Geloina expansa, Isognomon ephippium, Anadara antiquata and Polymesoda bengalensis. Station 1 with bivalves abundance of 960 ind/m² with mangrove density 1300 ind/ha. Station 2 with an abundance of 680 ind/m² bivalves with a mangrove density 1800 ind/ha. Stations with an abundance of bivalves of 2,360 ind/m² with a density of mangroves 2200 ind/ha. The relationship between bivalves abundance and mangrove density using simple linear regression analysis with weak category results
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Meng, Zhao Rong, Li Li, Hong Xun Chi, and Yao Qing Wu. "Assessment on Heavy Metals in Edible Bivalves in Dandong Market." Advanced Materials Research 955-959 (June 2014): 1184–88. http://dx.doi.org/10.4028/www.scientific.net/amr.955-959.1184.
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From April to October 2012, eight species of bivalves were selected and 12 samples were chosen from each species of bivalve from by random sampling method in Dandong market. The heavy metal contents of Pb, Cd, Cr, As and Hg in the edible parts of the bivalves were determined by using incomplete digestion - AAS method, and the assessment on the pollution situation of the eight species of bivalves was made by using the single factor index method. The results showed thatarcasubcrenatawas slightly polluted by As, and the pollution index was 0.51, and the other heavy metal contents in bivalves were lower than the pollution limit in the national standard of food safety. Therefore, the heavy metal accumulation ability inarca subcrenatawas higher than in the other bivalves.
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Payne, Jonathan L., Noel A. Heim, Matthew L. Knope, and Craig R. McClain. "Metabolic dominance of bivalves predates brachiopod diversity decline by more than 150 million years." Proceedings of the Royal Society B: Biological Sciences 281, no. 1783 (May 22, 2014): 20133122. http://dx.doi.org/10.1098/rspb.2013.3122.
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Brachiopods and bivalves feed in similar ways and have occupied the same environments through geological time, but brachiopods were far more diverse and abundant in the Palaeozoic whereas bivalves dominate the post-Palaeozoic, suggesting a transition in ecological dominance 250 Ma. However, diversity and abundance data alone may not adequately describe key changes in ecosystem function, such as metabolic activity. Here, we use newly compiled body size data for 6066 genera of bivalves and brachiopods to calculate metabolic rates and revisit this question from the perspective of energy use, finding that bivalves already accounted for a larger share of metabolic activity in Palaeozoic oceans. We also find that the metabolic activity of bivalves has increased by more than two orders of magnitude over this interval, whereas brachiopod metabolic activity has declined by more than 50%. Consequently, the increase in bivalve energy metabolism must have occurred via the acquisition of new food resources rather than through the displacement of brachiopods. The canonical view of a mid-Phanerozoic transition from brachiopod to bivalve dominance results from a focus on taxonomic diversity and numerical abundance as measures of ecological importance. From a metabolic perspective, the oceans have always belonged to the clams.
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Watanabe, Ryuichi, Makoto Kanamori, Hidetsugu Yoshida, Yutaka Okumura, Hajime Uchida, Ryoji Matsushima, Hiroshi Oikawa, and Toshiyuki Suzuki. "Development of Ultra-Performance Liquid Chromatography with Post-Column Fluorescent Derivatization for the Rapid Detection of Saxitoxin Analogues and Analysis of Bivalve Monitoring Samples." Toxins 11, no. 10 (October 1, 2019): 573. http://dx.doi.org/10.3390/toxins11100573.
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Saxitoxin (STX) and its analogues produced by toxic dinoflagellates accumulate in bivalves, and routine monitoring of bivalves is important to prevent cases of human poisoning. In this study, we describe a rapid detection method for the analysis of STXs using ultra-performance liquid chromatography with post-column fluorescent detection and to investigate water depths and sampling points optimal for shellfish toxin monitoring. Cultured scallops (Mizuhopecten yessoensis) and mussels (Mytilus galloprovincialis) collected from various water depths and sampling points were used in this study. Irrespective of bivalve species, toxin concentrations in bivalves were lower at deeper water depths. The toxin concentrations of bivalves did not differ greatly when bivalves were collected from the same bay. Although the levels of contamination of bivalves with STXs can depend on various environmental and geographical factors, our findings are useful for formulating a sampling protocol for the prevention of harvesting contaminated shellfish.
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Gillan, David C., and Chantal De Ridder. "Iron encrustation of the bivalve Montacuta ferruginosa." Journal of the Marine Biological Association of the United Kingdom 84, no. 6 (November 23, 2004): 1213–14. http://dx.doi.org/10.1017/s0025315404010677h.
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The epibiotic iron-encrusted biofilms occurring on the shell of the bivalve Montacuta ferruginosa were examined over an annual cycle in order to determine possible variation of the iron-encrustation. Among the 379 examined specimens, well-coated bivalves always predominate. However, it was found that about 50% of the small-sized bivalves were uncoated or weakly coated during the summer months. This result can be explained by the life history of the bivalve and by the physico-chemical conditions in the sediments.
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Vaughn, Caryn C., and Timothy J. Hoellein. "Bivalve Impacts in Freshwater and Marine Ecosystems." Annual Review of Ecology, Evolution, and Systematics 49, no. 1 (November 2, 2018): 183–208. http://dx.doi.org/10.1146/annurev-ecolsys-110617-062703.
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Bivalve molluscs are abundant in marine and freshwater ecosystems and perform important ecological functions. Bivalves have epifaunal or infaunal lifestyles but are largely filter feeders that couple the water column and benthos. Bivalve ecology is a large field of study, but few comparisons among aquatic ecosystems or lifestyles have been conducted. Bivalves impact nutrient cycling, create and modify habitat, and affect food webs directly (i.e., prey) and indirectly (i.e., movement of nutrients and energy). Materials accumulated in soft tissue and shells are used as environmental monitors. Freshwater mussel and oyster aggregations in rivers and estuaries are hot spots for biodiversity and biogeochemical transformations. Historically, human use includes food, tools, currency, and ornamentation. Bivalves provide direct benefits to modern cultures as food, building materials, and jewelry and provide indirect benefits by stabilizing shorelines and mitigating nutrient pollution. Research on bivalve-mediated ecological processes is diverse, and future synthesis will require collaboration across conventional disciplinary boundaries.
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Zhang, Xiangchao, Yuli Niu, Can Gao, Lingling Kong, Zujing Yang, Lirong Chang, Xiangfu Kong, Zhenmin Bao, and Xiaoli Hu. "Somatostatin Receptor Gene Functions in Growth Regulation in Bivalve Scallop and Clam." International Journal of Molecular Sciences 25, no. 9 (April 28, 2024): 4813. http://dx.doi.org/10.3390/ijms25094813.
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Bivalves hold an important role in marine aquaculture and the identification of growth-related genes in bivalves could contribute to a better understanding of the mechanism governing their growth, which may benefit high-yielding bivalve breeding. Somatostatin receptor (SSTR) is a conserved negative regulator of growth in vertebrates. Although SSTR genes have been identified in invertebrates, their involvement in growth regulation remains unclear. Here, we identified seven SSTRs (PySSTRs) in the Yesso scallop, Patinopecten yessoensis, which is an economically important bivalve cultured in East Asia. Among the three PySSTRs (PySSTR-1, -2, and -3) expressed in adult tissues, PySSTR-1 showed significantly lower expression in fast-growing scallops than in slow-growing scallops. Then, the function of this gene in growth regulation was evaluated in dwarf surf clams (Mulinia lateralis), a potential model bivalve cultured in the lab, via RNA interference (RNAi) through feeding the clams Escherichia coli containing plasmids expressing double-stranded RNAs (dsRNAs) targeting MlSSTR-1. Suppressing the expression of MlSSTR-1, the homolog of PySSTR-1 in M. lateralis, resulted in a significant increase in shell length, shell width, shell height, soft tissue weight, and muscle weight by 20%, 22%, 20%, 79%, and 92%, respectively. A transcriptome analysis indicated that the up-regulated genes after MlSSTR-1 expression inhibition were significantly enriched in the fat digestion and absorption pathway and the insulin pathway. In summary, we systemically identified the SSTR genes in P. yessoensis and revealed the growth-inhibitory role of SSTR-1 in bivalves. This study indicates the conserved function of somatostatin signaling in growth regulation, and ingesting dsRNA-expressing bacteria is a useful way to verify gene function in bivalves. SSTR-1 is a candidate target for gene editing in bivalves to promote growth and could be used in the breeding of fast-growing bivalves.
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Ambeng, Ambeng. "Ambeng, Hazairin Zubair, Ngakan Putu Oka dan Adi Tonggiroh." International Journal of Applied Biology 4, no. 1 (June 29, 2020): 27–35. http://dx.doi.org/10.20956/ijab.v4i1.9324.
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Community structure analysis is one way to describe and assess the environmental quality of an ecosystem. One part of environmental biotic that make up mangrove water ecosystems is bivalves. The mangrove area in the Pangkajene river estuary has become one of the bivalve habitats, which has been widely used by the community. Research on the bivalve community structure of the mangrove area in the Pangkajene river estuary was conducted in April - June 2019, which aims to get an overview and assess the environmental conditions of the mangrove area in the Pangkajene river estuary based on the bivalve community structure. The research place was divided into three stations, each station was divided into two sampling areas, and in each sampling area six sampling points were placed. Sampling was carried out using a 50 x 50 cm plot method. Community structure limits calculated include density, diversity index, uniformity, dominance, and dispersion, as well as measurement of water parameters including pH, Organic C, and substrate texture. The results showed that the composition of bivalve community types consisted of 19 species included in 12 families. The dominant type is Saccostrea sp. with a density of 15.11 ind / m2 (Cr 50.77%). The species diversity index value ranges from 0.91 - 1.91 with an average of 1.50, which indicates the level of diversity of bivalves is relatively low. The Bivalvia community uniformity index includes the unstable criteria and the level of dominance index includes the stable community criteria, with a uniform distribution pattern.
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Lattos, Athanasios, Ilias Chaligiannis, Dimitrios Papadopoulos, Ioannis A. Giantsis, Evanthia I. Petridou, George Vafeas, Alexandra Staikou, and Basile Michaelidis. "How Safe to Eat Are Raw Bivalves? Host Pathogenic and Public Health Concern Microbes within Mussels, Oysters, and Clams in Greek Markets." Foods 10, no. 11 (November 13, 2021): 2793. http://dx.doi.org/10.3390/foods10112793.
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Raw-bivalves consumption is a wide trend in Mediterranean countries. Despite the unambiguous nutritional value of seafood, raw consumption of bivalves may involve risks that could pose a significant threat to consumers’ health. Their filter-feeding behavior is responsible for the potential hosting of a wide variety of microorganisms, either pathogenic for the bivalves or public health threats. Under this prism, the current study was conducted in an effort to evaluate the risk of eating raw bivalves originating from the two biggest seafood markets in Thessaloniki, the largest production area of bivalves in Greece. Both microbiological and molecular methodologies were applied in order to assess the presence of various harmful microbes, including noroviruses, Bonamia, Marteilia, Esherichia coli, Salmonella, and Vibrio. Results indicated the presence of several Vibrio strains in the analyzed samples, of which the halophilic Vibrio harveyi was verified by 16S rRNA sequencing; other than this, no enteropathogenic Vibrio spp. was detected. Furthermore, although Esherichia coli was detected in several samples, it was mostly below the European Union (EU) legislation thresholds. Interestingly, the non-target Photobacterium damselae was also detected, which is associated with both wound infections in human and aquatic animals. Regarding host pathogenic microorganisms, apart from Vibrio harveyi, the protozoan parasite Marteilia refrigens was identified in oysters, highlighting the continuous infection of this bivalve in Greece. In conclusion, bivalves can be generally characterized as a safe-to-eat raw food, hosting more bivalve pathogenic microbes than those of public health concern.
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Zhang, Fei, Jian Cheng, Chungen Wen, Baoqing Hu, Gang Yang, and Shaoqing Jian. "Seasonal variation of a population Unionicola penicillatus (Unionicolidae) from the freshwater bivalve Cristaria plicata (Unionidae) in Poyang Lake, eastern China." Systematic and Applied Acarology 23, no. 2 (February 8, 2018): 288. http://dx.doi.org/10.11158/saa.23.2.5.
Full textAbstract:
The water mite Unionicola penicillatus (Wen, Gao & Zhu) (Acari: Unionicolidae) was collected in freshwater bivalve Cristaria plicata (Unionidae). The population variation of U. penicillatus was investigated in 504 bivalves during the period from August 2013 to July 2014 in Poyang Lake, East China. The results indicated that the overall prevalence and abundance of U. penicillatus was 9.52% and 1.58±10.38. The highest prevalence was 58.70% in September. The highest abundance levels were observed when the length of bivalves was in 220–300 mm. The number of U. penicillatus in a host was not correlated with the sex of bivalves. The outer and inner gills of bivalves were the preferred sites of U. penicillatus.
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Febrianti, Lulu, Imam Bachtiar, and Karnan. "Diversity of Gastropods and Bivalvia Caught By Pemadak in The Intertidal Zone of Serinting Beach, Special Economic Zone Mandalika." Jurnal Biologi Tropis 23, no. 1 (November 2, 2023): 81–89. http://dx.doi.org/10.29303/jbt.v23i4b.5921.
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The intertidal area is utilized by coastal communities to collect intertidal biota during low tides, which is called “madak. Madak culture is also practiced by the people of Sumbawa. One of the groups of animals taken during madak are Gastropods and Bivalves from the Phylum Mollusca. Gastropods and Bivalves have many benefits for coastal communities. One of the direct benefits of Gastropods and Bivalves for society is consumption. This research focuses on the diversity that leads to the taxonomy of Gastropods and Bivalves caught by fishmen in the intertidal zone of Serinting Beach.The present study aims to analyze the diversity of Gastropods and Bivalves harvested during madak, to develop identification keys for harvested Gastropods and Bivalves, and to identify the amount of exploitation of Gastropods and Bivalves in madak. This study used a descriptive method of quantitative approach by purchasing Gastropods and Bivalves harvested by 5 madak-women in 5 days convenience (convenience sampling) The results found 5 orders, 11 families, and 28 species from 715 individuals of Gastropoda, while 2 orders, 3 families, and 4 species from 69 individuals of Bivalvia. Madak Gastropods and bivalves were used to develop identification keys. It was estimated that the number of Gastropods exploited was 3.348,4 individuals and bivalves were 351,6 individuals 1 per month.
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Gu, Jiao, Kuanyi Li, Erik Jeppesen, Yanqing Han, Hui Jin, Hu He, and Xiaoyu Ning. "Using Freshwater Bivalves (Corbicula Fluminea) to Alleviate Harmful Effects of Small-Sized Crucian Carp (Carassius Carassius) on Growth of Submerged Macrophytes during Lake Restoration by Biomanipulation." Water 12, no. 11 (November 12, 2020): 3161. http://dx.doi.org/10.3390/w12113161.
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Increased recruitment of small-sized fish following biomanipulation by reducing the biomass of plankti-benthivorous fish, not least in (sub)tropical lakes, may deteriorate water quality and thereby potentially hamper the recovery of submerged macrophytes. Filter-feeding bivalves remove suspended particles from the water and may, thereby, somewhat or fully counteract this negative effect of the increasing abundance of small-sized fish. So far, only few studies have investigated the interactive effects of fish and bivalves on water clarity and macrophyte growth. We conducted a 2 × 2 factorial designed outdoor mesocosm experiment with two densities of small crucian carp Carassius carassius (low 10 g m−2 and high 40 g m−2) and two densities of bivalves Corbicula fluminea (low 204 g m−2 and high 816 g m−2). We found significant interactive effect of fish and bivalves on the growth of the macrophyte Vallisneria natans. In the low density bivalve regime, the relative growth rates, root mass, root:shoot ratio and number of tubers were 30.3%, 30.8%, 21.6% and 27.8% lower in the high than in the low density fish treatments, while the decrease was less pronounced in the high density bivalve regime: 1.2%, 8.7%, 2.1% and 13.3%, respectively. Thus, bivalves reduced the negative effects of fish, not least when bivalve density was high. The weaker effects of small fish on plants in the high- than in the low-density C. fluminea regime can be attributed to lower total suspended solids (TSS) and Chl a in the first week of the experiment. Better light conditions further stimulated the growth of benthic algae, potentially increasing the removal of nutrients from the water and reducing fish-driven resuspension of the sediment. In addition, high densities of C. fluminea also enriched the sediment total nitrogen (TN) and total phosphorus (TP) content, favouring plant growth as indicated by an increase in leaf tissue TN and TP contents. Our results demonstrate that filter-feeding bivalves can alleviate harmful effects of small fish by prolonging a clear-water state that facilitates submerged macrophyte growth. Addition of the bivalve C. fluminea can be a promising tool for the restoration of submerged macrophytes in shallow eutrophic lakes, in particular lakes containing small, rapidly reproducing fish that due to their small sizes are not capable of controlling the bivalves.
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Mapes, Royal H., and E. J. Benstock. "Color pattern on the Carboniferous bivalve Streblochondria? Newell." Journal of Paleontology 62, no. 3 (May 1988): 439–41. http://dx.doi.org/10.1017/s0022336000059217.
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This report describes a previously unknown chevron color pattern preserved on the Carboniferous bivalve Streblochondria? and discusses the significance of color patterns on Paleozoic bivalves as a group. Analysis of Paleozoic color pattern distribution suggests that the appearance of predators in the Devonian may have influenced preferential evolutionary selection for the development of color patterns in bivalves.
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MORUF, Rasheed Olatunji, Mogbonjubola Mutiat OGUNBAMBO, Mayomi Adenike TAIWO, and Oluwafolakemi Anthonia AFOLAYAN. "Marine Bivalves as a Dietary Source of High-Quality Lipid: A Review with Special Reference to Natural n-3 Long Chain Polyunsaturated Fatty Acids." Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Food Science and Technology 78, no. 1 (May 16, 2021): 11. http://dx.doi.org/10.15835/buasvmcn-fst:2020.0064.
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The most important nutritional feature of mollusks is their lipid composition. Marine bivalves are a good source of high quality lipid, mainly because they concentrate eicosapentaenoic acid and docosahexaenoic acid. Meanwhile, these n-3 Long Chain Polyunsaturated Fatty Acids (LC-PUFAs) are essential in the fight against inflammation, preventing depression, reducing weight and waist size, decreasing liver fat and promoting mental wellbeing. Typically, marine bivalves have a low saturated fatty acid content and a high n-3 LC-PUFA concentration, which is usually absent in most foods. Freshwater bivalves generally contain lower proportions of n-3 PUFA than marine bivalves; the lipid quality also differ in farmed and wild species. The focus of this review is on physiological important n-3 LC-PUFA present in marine bivalves, with an emphasis on the indicators for assessing quality and the effects of heat on bivalve lipid.
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Ambarwati, Reni, Nur Rohmatin Isnaningsih, and Dianah Filzan Alyani. "Diversity of marine bivalves of Madura Island, Indonesia based on the collections of Museum Zoologicum Bogoriense." E3S Web of Conferences 513 (2024): 03008. http://dx.doi.org/10.1051/e3sconf/202451303008.
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Bivalves (group of clams, mussels, cockles, etc.) are members of the Mollusca phylum, widespread in Indonesian waters. Madura Island is one of the large islands in the eastern part of Java Island, Indonesia. The Zoologicum Bogoriense Museum has the authority to store scientific collections, thus the specimens stored in this museum can serve as identification references as well as provide data on the richness of bivalves in a particular area. The purpose of this study was to describe the richness of marine bivalves on Madura Island, Indonesia based on the collections of the Muzeum Zoologicum Bogoriense (MZB). This research method was insitu observational by examining a collection of bivalves in MZB until August 2017. The research data obtained were then analyzed descriptive-quantitatively. The results revealed that based on the collection of specimens of MZB, there were thirty-six species of marine bivalves belonging to fourteen bivalve families in Madura, namely Arcidae, Carditidae, Donacidae, Glycymerididae, Isognomonidae, Mactridae, Malleidae, Mytilidae, Pectinidae, Pinnidae, Psammobiidae, Pteriidae, Spondylidae and Veneridae. Field works need to be carried out to inventory the bivalves found on Madura Island.
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Kupina, Natalia M. "The main results of the study of bivalve mollusks in the coastal zone of the Japan Sea." Izvestiya TINRO 182, no. 3 (September 30, 2015): 249–57. http://dx.doi.org/10.26428/1606-9919-2015-182-249-257.
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Technologies for processing of bivalve mollusks are developed on the base of study of their physical, chemical, and technological properties and evaluation of the food and biological value. Bivalves in the coastal waters of the Japan Sea are very different by their size and chemical composition, but all of them are a source of full value protein, essential amino acids, and some substances with therapeutic effect. Biochemical and technological properties of the bivalves differ significantly from traditional fish raw materials. Boiled and salted products of them are distinguished by high rigidity because of the high protein content of connective tissue and its specific microstructure. However, consistency of bivalve products can be regulated by means of thermal and biochemical processing of the raw material. Comprehensive waste-free technology of the bivalves processing is presented for manufacturing of food and fodder products with high consumer properties. The bivalve mollusks from the coastal waters of Primorye are considered as safe for food on the basis of phytotoxins content in their soft tissues, radionuclides activity, and concentrations of toxic elements in their foot, mantle and liver.
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McKeon, C. Seabird, Björn G. Tunberg, Cora A. Johnston, and Daniel J. Barshis. "Ecological drivers and habitat associations of estuarine bivalves." PeerJ 3 (November 12, 2015): e1348. http://dx.doi.org/10.7717/peerj.1348.
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Community composition of the infaunal bivalve fauna of the St. Lucie Estuary and southern Indian River Lagoon, eastern Florida was sampled quarterly for 10 years as part of a long-term benthic monitoring program. A total of 38,514 bivalves of 137 taxa were collected and identified. We utilized this data, along with sediment samples and environmental measurements gathered concurrently, to assess the community composition, distribution, and ecological drivers of the infaunal bivalves of this estuary system. Salinity had the strongest influence on bivalve assemblage across the 15 sites, superseding the influences of sediment type, water turbidity, temperature and other environmental parameters. The greatest diversity was found in higher salinity euhaline sites, while the greatest abundance of individual bivalves was found in medium salinity mixohaline sites, the lowest diversity and abundances were found in the low salinity oligohaline sites, demonstrating a strong positive association between salinity and diversity/abundance. Water management decisions for the estuary should incorporate understanding of the role of salinity on bivalve diversity, abundance, and ecosystem function.
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Ren, Qian, Chunyang Wang, Min Jin, Jiangfeng Lan, Ting Ye, Kaimin Hui, Jingmin Tan, et al. "Co-option of bacteriophage lysozyme genes by bivalve genomes." Open Biology 7, no. 1 (January 2017): 160285. http://dx.doi.org/10.1098/rsob.160285.
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Eukaryotes have occasionally acquired genetic material through horizontal gene transfer (HGT). However, little is known about the evolutionary and functional significance of such acquisitions. Lysozymes are ubiquitous enzymes that degrade bacterial cell walls. Here, we provide evidence that two subclasses of bivalves (Heterodonta and Palaeoheterodonta) acquired a lysozyme gene via HGT, building on earlier findings. Phylogenetic analyses place the bivalve lysozyme genes within the clade of bacteriophage lysozyme genes, indicating that the bivalves acquired the phage-type lysozyme genes from bacteriophages, either directly or through intermediate hosts. These bivalve lysozyme genes underwent dramatic structural changes after their co-option, including intron gain and fusion with other genes. Moreover, evidence suggests that recurrent gene duplication occurred in the bivalve lysozyme genes. Finally, we show the co-opted lysozymes exhibit a capacity for antibacterial action, potentially augmenting the immune function of related bivalves. This represents an intriguing evolutionary strategy in the eukaryote–microbe arms race, in which the genetic materials of bacteriophages are co-opted by eukaryotes, and then used by eukaryotes to combat bacteria, using a shared weapon against a common enemy.
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Jannah, Raudatul, and Adam Restu. "Bivalvia Community Structure in The Poton Bako Beach Area, Jerowaru, East Lombok." Jurnal Biologi Tropis 23, no. 2 (December 12, 2023): 292–97. http://dx.doi.org/10.29303/jbt.v23i2.6193.
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The bivalvia class is a class within mollusca that includes all types of shellfish that have a pair of shells. The aim of this research is to determine the structure of the bivalve community in the coastal waters of Poton Bako, East Lombok. This research was conducted on the coast of Poton Bako, Jerowaru, East Lombok. This research uses a proportional sampling method with quadratic transects. This research variable includes type and bivalves. In this study, 275 individuals of bivalve species were found. The research results show that the ecological condition of Poton Bako is in the relatively good category because the level of Bivalvia diversity is moderate at 1.38 with a high evenness index of 0.60 and a low dominance index of 1.13. In this research, it is necessary to carry out further research regarding distribution patterns, exploitation rates, characteristics of pemadak, and conservation efforts.
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Stock, Jan H. "Copepoda (Crustacea) associated with commercial and non-commercial Bivalvia in the East Scheldt, The Netherlands." Bijdragen tot de Dierkunde 63, no. 1 (1993): 61–64. http://dx.doi.org/10.1163/26660644-06301004.
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Six species of Copepoda Poecilostomatoida of the families Myicolidae, Sabelliphilidae, Lichomolgidae, and Mytilicolidae are recorded from six different species of intertidal bivalves in the East Scheldt (The Netherlands), a branch of the southern bight of the North Sea. One bivalve species may harbour more than one species of copepod, and one copepod species may use more than one species of bivalves as host.
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Raju, Jitty, Jobin Johnson, Akshay Jeevan, and Julius T. Capili. "Heavy Metal Determination of Bivalves in Cagayan Valley, Philippines." Scholars Academic Journal of Biosciences 9, no. 10 (October 2, 2021): 256–58. http://dx.doi.org/10.36347/sajb.2021.v09i10.001.
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Level of heavy metals like Cadmium (Cd) and Lead (Pb) in bivalves has been intensively studied during recent years as these hazardous substances could be accumulated in the biota and has been a hot issue in marine environmental studies. By consuming the shellfish, risk of bivalve related diseases may increase. And this shellfish poisoning is a concern to public health. This research study aims to determine if the Bivalves in Cagayan Valley, Philippines is safe to consume. The Freshwater clam (Corbicula fluminea) and the Marine mussel (Mytilus edulis) in Cagayan Valley, Philippines was collected for this study. The byssus and shells were removed, leaving only soft tissues to be used for the analysis and they were categorized into two. Graphite Furnace- Atomic Absorption Spectrophotometer (GFAAS) was used to determine the concentrations of Cadmium (Cd) and Lead (Pb). The results showed that the Freshwater bivalves Corbicula fluminea has a concentration 0.006 μg/g of Lead (Pb) and a concentration 0.016 μg/g. of Cadmium (Cd) while for Marine bivalves Mytilus edulis, the concentration of Pb was 0.011 μg/g and the concentration of Cd levels was 0.015 μg/g. The test results showed that the heavy metals, lead, and cadmium, were at low levels when referred to guidelines on heavy metals for food safety by different countries, particularly Malaysia. Thus, the results that were found were quite lower and there are no health risks to the people when consuming these bivalves collected from the province of Cagayan. Based on the results of the study conducted, the researchers recommend using different bivalve species to know the levels of heavy metals on bivalve species, investigate lead and cadmium heavy metals concentrations of one species collected in different areas/locations in Cagayan Valley and investigate the lead and cadmium heavy metal concentration of different bivalves in a regular basis i.e., monthly, or quarterly for at least 1 year.
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Tuskes, Paul. "The Diet of Octopus bimaculoides in Mission Bay, California (Mollusca: Cephalopoda)." Festivus 53, no. 2 (April 1, 2021): 85–100. http://dx.doi.org/10.54173/f532085.
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A year-long survey of Octopus bimaculoides Pickford & McConnaughey (1949) dens in three different subtidal habitats was conducted in Mission Bay, California. Habitat complexity and stability were positively associated with prey species richness, species abundance, and den availability. Collectively, 38 species of bivalves and 22 species of gastropods were recorded from octopi debris fields. Two species of bivalve at each site comprised approximately 60% or greater of the bivalves in the debris fields. Bivalves species represented 85% of the take, the remainder being gastropods. With the exception of the bubble snail, most gastropods were drilled, while most bivalves were not. Crustacean remains were infrequently found in debris fields. Prey species in other phyla may have been consumed, but their remains were not found in the debris fields.
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Abdulla-Al-Asif, Hadi Hamli, Abu Hena Mustafa Kamal, Mohd Hanafi Idris, Geoffery James Gerusu, Johan Ismail, and Muyassar H. Abualreesh. "Bivalves (Mollusca: Bivalvia) in Malaysian Borneo: status and threats." Journal of Threatened Taxa 13, no. 11 (September 26, 2021): 19553–65. http://dx.doi.org/10.11609/jott.7287.13.11.19553-19565.
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Species checklists enlist the species existing within a distinct geographical biome and assist as an indispensable input for evolving conservation and administration strategies. The arenas of conservation ecology and biology face the challenge of exaggerated biodiversity, accredited to the non-recognition of taxonomic inconsistencies. The study’s goals are to organize all scattered taxonomic information regarding bivalve molluscs from Malaysian Borneo, i.e. Sarawak and Sabah, under one umbrella. Available literature regarding Malaysian Borneo was reviewed. The published taxonomic data on bivalve species, conservation status, inconsistencies, habitats (marine, fresh, and brackish), research aspects, threats, and conservation strategies are presented. A critical review of the checklists and distributional records of the class Bivalvia from Malaysian Borneo and subsequent validation of species names with the World Register of Marine Species (WoRMS) database revealed that currently 76 bivalve species from 12 orders and other entities, 18 superfamilies, and 27 families have been recorded from the area. Twenty-six inconsistencies with WoRMS were found, and the corrected names are presented. The study indicates most of the enlisted bivalve species have not been evaluated by the IUCN Red List authority and have ‘Least Concern’ or ‘Data Deficient’ status for Malaysian Borneo. To date, published documents on conservation decision strategies and guidelines for future research are not good enough. Nevertheless, potential threats and their remedies for bivalves in the enriched Malaysian Borneo ecosystems are discussed herein.
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Yuliansari, Dini. "KANDUNGAN LOGAM BERAT TIMBAL (Pb) PADA BERAGAM JENIS BIVALVIA DI KAWASAN PANTAI KABUPATEN BANGKALAN." Bioscientist : Jurnal Ilmiah Biologi 8, no. 1 (November 18, 2020): 11. http://dx.doi.org/10.33394/bjib.v8i1.2666.
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Bivalvia is one of the organisms that is able to accumulate heavy metal content in the body. Lead heavy metal (Pb) is a heavy metal that is toxic if the level exceeds the safe limit that has been set both on the body of an organism or in humans. The purpose of this study was to determine the various types of bivalves found in Bangkalan Coastal Madura Island, and to analyze the content of lead heavy metals (Pb) in bivalve bodies found in the region. This research is observational. Sampling was carried out by hand sorting, then identified the type of bivalves that were obtained and then the samples were taken to the laboratory for testing using the Atomic Absorption Spectrophotometer (AAS). The results of the study are known that, the types of bivalves found and identified in the Bangkalan Coastal area of Madura Island are Bamboo Scallops (Solen sp.), Blood Scallops (Anadara granosa), Sweet Scallops (Meretrix meretrix), and Stone Scallops (Placamen isabellina). Laboratory test results of lead heavy metal content (Pb), it is known that each clam accumulates lead heavy metal (Pb) with different amounts of concentration, wherein the heavy metal content of lead (Pb) in Bamboo / Lorry Shells (0.168-0.208 ppm) , Blood Shells (0.152-0.231 ppm), Sweet Shells (0.161-0.288), and Stone Shells (0.143-0.169 ppm), and it is known that the heavy metal content of lead (Pb) of the four bivalves is still below the threshold level of metal contamination according to Kep. Ditjen POM No. 03725/B/SK/VII/1989 which determines that the maximum limit of lead (Pb) heavy metal content in marine organisms is 2 ppm.
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Jaida, I. F., I. Widowati, R. Hartati, and N. Nurdin. "Biodiversity of Bivalves in South Bintan Waters, Riau Archipelago, Indonesia." IOP Conference Series: Earth and Environmental Science 934, no. 1 (November 1, 2021): 012075. http://dx.doi.org/10.1088/1755-1315/934/1/012075.
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Abstract Bivalves is the second most diverse group of molluscs after gastropods, they are also one of the most important members in marine ecosystems. Their taxonomic classifications are based on their morphology which tend to represent adaptation responses to ecology. The samples of bivalves examined in this study were taken in the South Bintan waters by Marine Geological Research and Development Center, Bandung. Identification of the bivalves shell samples was with the aid of a microscope and NIS-Elements software and identified using an identification book. There were 34 species of bivalves found in South Bintan Waters belong to 14 families. The highest abundance was in Station 1 the location close to the overflow of the river and a harbor (1162.5 ind.m-2) and the lowest was in Station 10 the location Station 10 the location close to a small island which is usually used as a tourist spot (62.5 ind.m-2). Their diversity and eveness index were included in the medium category with H’ value of 0.58-4.12 and e value of 0.11-0.89 respectively. There was species dominance in Station 3 (Liralucina lyngei of Lucinidae) and 10 (Cardites bicolor of Carditidae) but not in other stations. Both species was the most frequent species. Bivalves in South Bintan waters showed many different morphologies which represented their adaptation. The bivalve shells found were of different morphology. There are several forms of bivalve shell morphology that have shape round like species Chama japonica, triangular like species Gemma gemma, fragile like species Dendostrea rosacea. The shell decorations found in the bintan Bivalves samples are Spinose, Commarginally, Commarginally and radially ribbed. The hinge teeth are heteroodont, isodont, and schizodont.