Готові списки джерел за темами / Sciaenids

Добірка наукової літератури з теми "Sciaenids"

Автор: Grafiati

Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Sciaenids"

Andriwibowo, Andriwibowo, Adi Basukriadi, and Erwin Nurdin. "Spatial Distributions and Model Selections of Commercial Estuarine Fish (Sciaenidae) Populations Related to Water Quality, Chl-a, and AML in Musi River mouth, South Sumatra." 3BIO: Journal of Biological Science, Technology and Management 3, no. 2 (November 12, 2021): 1–11. http://dx.doi.org/10.5614/3bio.2021.3.2.1.

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Estuary and river mouth are essential habitats for many commercial estuarine fishes, including the Sciaenidae family. While recently, estuaries have been threatened by anthropogenic marine litter (AML) transported from nearby land and river. An important type of AML is plastic litter since it takes a long degradation time. In the South Sumatra Province, Indonesia, one of the vital estuaries is the Musi estuary. This paper aims to map the spatial distributions of two Sciaenids, including Panna microdon and Otolithoides pama, and Sciaenid’s environmental covariates, including water quality, chlorophyll a, and plastic litters in Musi estuary and model the correlations of Sciaenids with their covariates. The maps were developed using GIS, and the model was validated using AIC methods. The data were collected from 3 river mouths in the west, central, and east of the Musi estuary. The data showed that the populations of both Sciaenids were higher in the east river mouth rather than in the west. Sciaenid populations were positively correlated with high salinity, DO, chlorophyll a, moderate transparency, and low temperature. A high load of AML’s frequency (7.54 items/m2) and weights (36.8 gram/m2) has reduced both Sciaenid populations in the central river mouth of the estuary. In contrast, low AML loads in the east have correlated with high Sciaenid populations. Model selection based on AIC values shows the best model for P.microdon retained an effect of AML weight with AIC values of 22.591 and 28.321 for O. pama. This concludes that the weight of plastic litter in estuary water was the main limiting factor for Sciaenid populations in Musi.

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Moravec, F., E. J. Fajer-Avila, and M. Bakenhaster. "Philometra floridensis sp. n. (Nematoda: Philometridae) from the ovary of red drum Sciaenops ocellatus (Osteichthyes: Sciaenidae) off the coast of Florida, USA." Journal of Helminthology 84, no. 1 (July 7, 2009): 49–54. http://dx.doi.org/10.1017/s0022149x09990290.

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AbstractA new nematode species, Philometra floridensis sp. n. (Philometridae), is described from male and female specimens found in the ovary of red drum, Sciaenops ocellatus (Linnaeus) (Sciaenidae, Perciformes), from the Gulf of Mexico off Treasure Island, Florida, USA. Based on light and scanning electron microscopy examination, the new species differs from most other gonad-infecting Philometra spp. in having a smooth gubernaculum with a distinct dorsal tooth on the distal tip. The new species is most similar to P. carolinensis Moravec, de Buron & Roumillat, 2006, but differs in length and shape of spicules. It can be distinguished from P. carolinensis and other species with unknown males, by the markedly greater body length of gravid females (up to about 100 cm). Philometra floridensis is the third valid gonad-infecting species of Philometra reported from sciaenids.

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Schmidt, Thassya Christina dos Santos, and June Ferraz Dias. "Pattern of distribution and environmental influences on the Scienidae community of the Southeastern Brazilian coast." Brazilian Journal of Oceanography 60, no. 2 (June 2012): 233–43. http://dx.doi.org/10.1590/s1679-87592012000200013.

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The Sciaenids have among the highest species richness, numerical abundance and biomass of any family of fishes along the Brazilian coast. The aim of this study was to analyze the composition and spatial and temporal distribution of as well as the influence of temperature, salinity and depth on the sciaenid assemblage of Santos Bay. A total of 29,306 individuals belonging to 13 genera and 21 species were captured, between November 2004 and December 2005, with Stellifer rastrifer representing 70.4% of the total composition. Highest abundance and biomass occurred on the east side of the bay, and the highest species richness occurred near the mouth of the Santos Channel, which was also the site with least similarity to the other sites. Highest abundances occurred in April 2005 and lowest in September 2005. Key environmental factors influencing distribution of sciaenids were depth and temperature.

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Lakra, Wazir S., M. Goswami, V. Mohindra, K. K. Lal, and P. Punia. "Molecular identification of five Indian sciaenids (pisces: perciformes, sciaenidae) using RAPD markers." Hydrobiologia 583, no. 1 (February 26, 2007): 359–63. http://dx.doi.org/10.1007/s10750-006-0480-x.

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Simanjuntak, Charles P. H., Kustiyani Kustiyani, Ridwan Affandi, M. Fadjar Rahardjo, and Tri Prabowo. "Feeding preferences and diet overlap of sciaenids fishes in Pabean Bay, Indramayu." Jurnal Iktiologi Indonesia 22, no. 2 (June 29, 2022): 157–75. http://dx.doi.org/10.32491/jii.v22i2.652.

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The trophic ecology of Sciaenid fishes, one group of the demersal fishes in Pabean Bay, Indramayu is described in our study. A total of 14 types of prey were identified belonging to three groups (Decapod Crustacean, Mollusca, and Bony fishes) to analyze the feeding preferences and diet breadth overlap. The preferred prey items of Johnius belangerii (Belanger's croaker) were Calappidae (Ii = 16.12), followed by Squilla sp. (15.5), and Penaeus sp. (14.6); while Johnius borneensis (Sharpnose hammer croaker) were Penaeus sp. (Ii = 86.5), followed by Calappidae (3.45), and Acetes sp. (1.38); Johnius macropterus (Largefin croaker) were Penaeus sp. (Ii = 35), followed by Callapidae (5); Nibea soldado (Soldier croaker) were Penaeus sp. (Ii = 25.63) followed by Squilla sp. (23.98), and Charybdis sp. (16.42); Otolithes ruber (Tigertooth croaker) was Penaeus sp. (Ii = 25.63). The diet breadth (BA) values indicate that Sharpnose hammer croaker (BA = 0.06) and Tigertooth croaker (BA = 0.07) are high specialist consumers, while Belanger's croaker (BA = 0.36) and Soldier croaker (BA =0.34) are considered as non-specialized feeders. Our study showed that sciaenid fishes have overlapping trophic niches intra and inter-specific due to their common feeding on decapod crustaceans. The high trophic overlap between predators suggests that Sciaenid fishes in Pabean Bay are competing with each other when food resources are limited. Abstrak Ekologi trofik famili Sciaenidae, salah satu kelompok ikan demersal di perairan Teluk Pabean, Indramayu dideskripsikan melalui studi ini. Sebanyak 14 jenis makanan dari tiga kelompok utama (Krustasea Decapoda, Moluska, dan ikan bertulang sejati) berhasil diidentifikasi untuk analisis preferensi dan tumpang tindih relung makanan ikan Sciaenidae. Mangsa yang diminati oleh ikan Johnius belangerii (Belanger's croaker) adalah Calappidae (Ii = 16,12), diikuti oleh Squilla sp. (15,5), dan Penaeus sp. (14,6); sementara ikan Johnius borneensis (Sharpnose hammer croaker) menyukai Penaeus sp. (Ii = 86,5), disusul oleh Calappidae (3,45), dan Acetes sp. (1,38); ikan Johnius macropterus (Largefin croaker) menyenangi Penaeus sp. (Ii = 35), diikuti oleh Callapidae (5); sedangkan ikan Nibea soldado (Soldier croaker) cenderung memilikih Penaeus sp. (Ii = 25,63), Squilla sp. (23,98), dan Charybdis sp. (16,42); sedangkan Otolithes ruber (Tigertooth croaker) lebih banyak mengonsumsi Penaeus sp. (Ii = 25,63). Nilai relung makanan (BA) mengindikasikan bahwa ikan Sharpnose hammer croaker (BA = 0,06) dan Tigertooth croaker (BA = 0,07) adalah termasuk pemangsa yang spesialis, sedangkan Belanger's croaker (BA = 0,36) dan Soldier croaker (BA = 0,34) lebih cenderung sebagai pemangsa yang bukan spesialis. Tumpang tindih relung makanan khususnya jenis krustasea decapoda terjadi baik antarspesies maupun antar individu dari spesies yang sama, termasuk antar kelompok ukuran. Tumpang tindih relung makanan yang tinggi antar ikan predator menunjukkan bahwa kelompok ikan Sciaenidae di Teluk Paben berkompetisi memperebutkan makanan saat terjadi kelangkaan sumberdaya makanan.

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Sarpedonti, Valérie, Érica Moema Silva da Anunciação, and Adriana Oliveira Bordalo. "Spatio-temporal distribution of fish larvae in relation to ontogeny and water quality in the oligohaline zone of a North Brazilian estuary." Biota Neotropica 13, no. 3 (September 2013): 55–63. http://dx.doi.org/10.1590/s1676-06032013000300007.

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Larval fish assemblage in Guajará Bay was studied through four quarterly field campaigns and discussed in relation to individuals' development stages and exposure to contaminants poured out by the Pará State Capital City, Belém. Larval densities were low and diversity extremely poor with a strong dominance of clupeids, engraulids and, to a lower extent, sciaenids. The main spawning season was registered at the onset of the rainy period. Pre-flexion and flexion clupeiforms remained in the farmost stations from the city while post-flexion larvae were found near urban activity centres. Unlikely, pre-flexion and flexion sciaenids were scattered along the city waterfront. Post-flexion larvae were rare; it is suggested that sciaenids use the bay as a transitory route between their spawning grounds and more distant nursery grounds. The waters around the city of Belém showed signs of contamination. However, based on the literature, Guajará Bay environmental quality at the time of the study was suitable for fish larvae life. Nitrate with pH best explained larval distribution.

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Oliveira, Edinbergh C. de, and Efrem J. G. Ferreira. "Spawning areas, dispersion and microhabitats of fish larvae in the Anavilhanas Ecological Station, rio Negro, Amazonas State, Brazil." Neotropical Ichthyology 6, no. 4 (December 2008): 559–66. http://dx.doi.org/10.1590/s1679-62252008000400003.

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The abundance and distribution of ichthyoplankton and their relationships to current velocity, temperature, dissolved oxygen, pH and electrical conductivity of the water in the Anavilhanas Ecological Station, Negro River, Amazonas State, Brazil, were analyzed. Preferred microhabitats for spawning, dispersion and nursery were also verified. Sampling was undertaken during the falling water period of 2001 and the rising water period of 2002, in a section of 100 km subdivided into 5 subsections, with a total of 20 stations (5 beaches, 5 ravines, 5 channels, and 5 lake channels) at night and during the day at the surface and at the bottom. 647 eggs and 4,187 larvae were captured, belonging to 10 families and four orders: Characiformes (6), Siluriformes (2), Perciformes (1), and Clupeiformes (1). Engraulidae (55.39%), Pimelodidae (30.45%), Auchenipteridae (5.23%) and Sciaenidae (5.13%) were the dominant families. The hierarchical statistical model (ANOVA) with three factors (microhabitat, depth and period) was applied to the environmental variables and the larval abundance, showing greater abundances of sciaenids in the ravines and lower abundances of engraulids in the channels. The highest captures were obtained at lower temperature values, at the bottom during the day and at the surface at night, suggesting an active larval behavior. The presence of the four larval development stages in all subsection for pimelodids and sciaenids, and in three subsections for engraulids, indicates that the Anavilhanas Ecological Station is an important spawning and nursery area for species of these groups in the Negro River. Larvae abundance of all characiform families was extremely low (from 0.1 to 1.17%), suggesting that they do not spawn in this system.

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Holt, GJ, SA Holt, and CR Arnold. "Diel periodicity of spawning in sciaenids." Marine Ecology Progress Series 27 (1985): 1–7. http://dx.doi.org/10.3354/meps027001.

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Kubicek, Kole M., and Kevin W. Conway. "Developmental osteology ofSciaenops ocellatusandCynoscion nebulosus(Teleostei: Sciaenidae), economically important sciaenids from the western Atlantic." Acta Zoologica 97, no. 3 (April 17, 2015): 267–301. http://dx.doi.org/10.1111/azo.12122.

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CHAO, NING LABBISH, CHIH-WEI CHANG, MENG-HSIEN CHEN, CHANG-CHANG GUO, BAI-AN LIN, YOU-YU LIOU, KANG-NING SHEN, and MIN LIU. "Johnius taiwanensis, a new species of Sciaenidae from the Taiwan Strait, with a key to Johnius species from Chinese waters." Zootaxa 4651, no. 2 (August 5, 2019): 259–70. http://dx.doi.org/10.11646/zootaxa.4651.2.3.

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A new sciaenid fish, Johnius taiwanensis, is described from the southeast coast of mainland China from Zhejiang to Guangdong, Hong Kong, and west coast of Taiwan. Johnius taiwanensis sp. nov. can be distinguished from other Johnius species by having a grayish dorsal half of body divided by a clear line from a whitish ventral half, and a black spot at the dorsal half of pectoral-fin axil, appearing as a distinct dot at the most dorsal point of the pectoral-fin base. First dorsal fin black tipped, other fins pale to dusky but never darkly pigmented. The species lacks distinctly enlarged teeth on upper and lower jaws. Body scales ctenoid, moderately large, with five or six rows between first dorsal-fin origin and lateral line. It is one of the most abundant sciaenids found in the shallow coastal waters (<20 m) of southeast mainland China and the west coast of Taiwan. It has often been misidentified as J. macrorhynus in the region. Phylogenetic analysis from all 27 sciaenid species found in Chinese waters based on the complete COI and 16S rRNA gene sequences confirmed that the genus Johnius is monophyletic and J. taiwanensis is placed as a sister species of J. trewavasae. Acoustic analysis has shown that J. taiwanensis produces a unique sound among fishes in Taiwan coastal waters.

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Більше джерел

Дисертації з теми "Sciaenids"

Griffiths, Marc H. "The taxonomy and life-history of Argyrosomus japonicus and A. inodorus, two important sciaenids off the South African coast." Thesis, Rhodes University, 1996. http://hdl.handle.net/10962/d1005169.

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A study of the biology, anatomy and taxonomy of the sciaenid fishes of the genus Argyrosomus from South Africa and Namibia revealed that three species were confused under the name "Argyrosomus Izololepidotus (Lacepède 1801)". Comparison of morphometric and meristic data, otoliths, swim-bladders, drumming muscles, and other morphological features of specimens from southern Africa, Madagascar, the Mediterranean, the eastern Atlantic Ocean, Japan and Australia, revealed that "A. hololepidotus" is a complex of four species: A. japonicus (Temminck & Schlegel 1843), which occurs off southern Africa, Japan and Australia; A. inodorus sp. nov., which is known from Namibia to the Kei River (32°40'S) on the east coast of South Africa; A. coronus sp. nov., which is known from central and northern Namibia and Angola, and A. hololepidotus, which appears to be endemic to Madagascar. Both A. japonicus and A. inodorus are important recreational and commercial linefish species in South Africa. Although A. inodorus occurs on the east and west coasts of South Africa, and A. japonicus is found between Cape Point and Mozambique, the former species is abundant only between Cape Point and the Kei River, and the latter species from Cape Agulhas to northern KwaZulu/Natal. The life-histories of Argyrosomus japonicus and A. inodorus, within these respective ranges, were elucidated using length-at-age, reproductive, catch and effort, size composition, otolith dimension/fish length and tagging data. Median sizes at maturity (L₅₀) for A. japonicus were 920 mm TL (5 years) for males and 1070 mm TL (6 years) for females. All males >1100 mm TL (7 years) and all females >1200 mm TL (8 years) were mature. Females grew faster than males, but in both sexes growth slowed dramatically after maturity. Maximum age recorded was 42 years, but fish older than 27 years were rare. Adult A. japonicus were predominantly found in the nearshore marine environment, but also occurred in estuaries and in the surf zone. Spawning takes place in the nearshore environment, from August to November in Natal, and from October to January in the Southern and South-Eastern Cape regions. A large proportion of the adult population migrate to Natal to spawn, although spawning may continue once they return to the Cape. Early juveniles of 20-30 mm TL recruit into turbid estuaries along the entire east coast, possibly aided by olfactory cues. They appear to remain in the upper reaches of the estuaries where they find suitable food and refuge from predators until they grow to about 150 mm TL. Juveniles larger than this size were found in the middle and lower reaches of estuaries and also in the surf zone. Juvenile A. japonicus (<1000 mm TL) generally did not migrate long distances, but remained as separate sub-stocks until they reached maturity. A. inodorus grows more slowly than A. japonicus, and attains a lower maximum age (25 years) and a smaller maximum size (34 vs 75 kg). There was no significant difference between the growth rates of male and female A. inodorus. Those in the South-Westem Cape initially grew faster than those on the east coast, but growth slowed sooner in the former region with the result that these fish attained a smaller maximum size. Although ripe A. inodorus were sampled throughout the year, there was a distinct spawning season from August to December, with a peak in spring (Sept-Nov). Spawning occurred throughout the study area for this species, in <50 m depth. Size at sexual maturity for A. inodorus was smaller in the South-Eastern Cape than in the Southern Cape. Median size at maturity for females was attained at 310 mm TL (1.3 years) in the former and at 375 mm TL (2.4 years) in the latter region, and the length at which all females were mature was 400 mm (3.5 years) and 550 mm (4.7 years) respectively. For males the estimates of Lso and total maturity were 200 mm (1 year) and 400 mm (2.8 years) for the SouthEastern Cape and 250 mm (1.5 years) and 450 mm (3.4 years) in the Southern Cape. East of Cape Agulhas, A. inodorus was found from just beyond the surf zone to depths of 120 m. Adults occurred predominantly on reef (>20 m) while juveniles were found mainly over soft substrata of sand/mud (5-120 m depth). Early juveniles do not enter estuaries, but apparently recruit to nursery areas immediately beyond the backline of breakers (5-10 m depth), and then move seawards with growth. No juveniles were obtained from the area west of Cape Agulhas as substrates <200 m depth were unsuitable for trawling. Due to lower water temperatures, the adults in this area were found from within the surf zone to depths of only 20 m. East and west of Cape Agulhas there was evidence of offshore dispersal in winter, in response to oceanographic changes. Based upon otolith morphology, juvenile and adult distribution patterns, sizes at sexual maturity and on tagging data, A. inodorus between Cape Point and the Kei River apparently exist as three separate stocks, one in the South-Eastern Cape, one in the Southern Cape and one in the South-Western Cape, with limited exchange. The life-histories of A. japonicus and A. inodorus are discussed in terms of their management. The large size at maturity of A. japonicus together with evidence for considerable human impact on the early juvenile, juvenile, and the adult phases of the life-cycle indicate that estuarine nursery habitats need to be conserved, that the minimum size limit should be increased, and that current bag limits for this species should be reviewed. Although the current minimum size limit provides protection for A. illodorus until maturity, evidence is presented which indicates that at least one and possibly all of the stocks of this species are currently over-exploited. Stock assessment of the South African A. japonicus and A. inodorus resources, and the implementation of effective management strategies, are therefore a matter of urgency.

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Farmer, Bryn Morgan. "Comparisons of the biological and genetic characteristics of the Mulloway Argyrosomus japonicus (Sciaenidae) in different regions of Western Australia /." Murdoch University Digital Theses Program, 2008. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20090716.94528.

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Hill, Gary. "Ontogeny of the Sexually Dimorphic Sonic Muscle in Three Sciaenid Species." W&M ScholarWorks, 1985. https://scholarworks.wm.edu/etd/1539617558.

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Ninin, Andressa Pinter dos Santos. "Morfologia e distribuição de peixes da família Sciaenidae no estágio de transformação na costa sul e sudeste do Brasil." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/21/21131/tde-29062009-160750/.

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No sudeste e sul do Brasil, os peixes da família Sciaenidae estão entre os peixes mais pescados sobre a plataforma continental interna. O conhecimento da ocorrência tanto espacial quanto temporal dos indivíduos na fase de transformação, que se estabelecem no local onde se desenvolverão, torna-se informação fundamental para o entendimento do ciclo de vida das espécies e, por extensão, para ações de preservação e de manejo de recurso. Porém, descrições das espécies de Sciaenidae na fase de transformação são escassas, impedindo a identificação desses peixes. Neste trabalho são estudadas 22 espécies das 28 de Sciaenidae do sudeste e sul do Brasil no estágio de desenvolvimento de transformação com base em material acumulado nas instituições que mantém coleções de peixe. Séries de crescimento de 16 dessas espécies foram morfologicamente descritas e ilustradas, bem como elaborada uma chave de identificação das espécies que ocorrem na área. A ocorrência espacial e temporal das amostras foram mapeadas, sendo estimada a época de nascimento e confrontada com a literatura sobre crescimento e reprodução. Foi observado que a maioria das espécies se restringe a estuários e baías, em águas rasas, havendo indícios de predomínio da época de nascimento (e portanto, de desova) no verão.
In the southeast and south of Brazil, the Sciaenidae are among the most caught fishes on the shallow waters of the continental shelf. Spacial and temporal occurrence knowledge of individuals at the transformation stage is a fundamental information for understanding the life cycle of the species and, by extension, for preservation and management action. Morphological descriptions of Sciaenidae fishes at that developmental stage are scarce, preventing their taxonomic identification. In this work 22 species from the 28 of Sciaenidae in the southeast and south of Brazil are studied on the transformation stage based on material from the institutions that maintain collections of fish. Series of growth of 16 of these species were morphologically described and illustrated, as well as draft a key to identify the species that occur in the area. The spacial and temporal distribution of the samples were mapped, being estimated the time of birth and faced with the literature on growth and reproduction. It was observed that most species are strict to shallow waters of estuaries and bays, with evidence of the predominance of the time of birth (and therefore spawning) in the summer.

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Hutchings, Kenneth. "Taxonomy, biology and management of South African sciaenid fish of the genus Umbrina." Doctoral thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/6704.

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This research was initiated in 2001 with the overall objective of providing scientific information relevant to the sustainable management of South African Umbrina species. Previously there was confusion over the identity and distribution of Umbrina species in South African waters and very little was known of their life histories, population dynamics and stock status. Morphological comparison of a large number of South African Umbrina (n = 369) with specimens from the type locality (Canary Islands) confirmed the identity of South African U canariensis Valenciennes, 1843, and allowed for an expanded description of the species. However, differences between specimens of U ronchus Valenciennes, 1843 and those of the second South African species, lead to the resurrection of U robinson; Gilchrist and Thompson 1908, as a valid name for this species. Spatial analysis of South African specimens collected with a variety of gear revealed U robinsoni to be a shallow water species found from the surf-zone to 40 m depth that is targeted by recreational shore anglers and spear fishers, whilst U canariensis occurs predominantly from 40-100m depth and is predominately landed as a by-catch in the inshore trawl fishery. Although both species occur throughout the South African eastern seaboard, U canariensis is most common west of the Kei River, where the continental shelf is wider.

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Frehse, Fabrício de Andrade. "Estrutura populacional e dieta de Stellifer rastrifer (Jordan, 1889) e Stellifer brasiliensis (Schultz, 1945) (Scianeidae, Perciformes), nos periodos diurno e noturno, em quatro areas da plataforma sul do estado do Parana e norte do estado de Santa Cat." reponame:Repositório Institucional da UFPR, 2009. http://hdl.handle.net/1884/18392.

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Bernatzeder, Andrea Katinka. "Salinity induced physiological responses in juvenile dusky kob, Argyrosomus japonicus (Sciaenidae)." Thesis, Rhodes University, 2009. http://hdl.handle.net/10962/d1005163.

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Fisheries management regulations for dusky kob Argyrosomus japonicus, an important commercial and recreational fisheries species, have failed and the stock is considered collapsed. It is important to take an ecosystems approach to management which includes understanding the effect of environmental factors on recruitment, abundance and distribution. The distribution of early juveniles (20-150 mm TL) in the wild appears to be restricted to the upper reaches of estuaries at salinities below 5 psu. Food availability could not explain the distribution of early juveniles. The aim of this study was to investigate the role of salinity on the distribution of early juvenile dusky kob (<150 mm TL) by examining physiological responses of juveniles exposed to a range of salinities under laboratory conditions. The hypothesis was that the physiological functioning of early juveniles would be optimised at the reduced salinities which they naturally occur at. The objectives of this study were to investigate the effect of salinity on: i) plasma osmolality; ii) growth, food conversion ratio and condition factor; and iii) gill histology with emphasis on chloride cell size and number. A preliminary study was undertaken to determine whether the use of 2-phenoxyethanol had an effect on plasma osmolality. Juveniles pithed prior to blood sampling were used as the control. Plasma osmolality was not affected by exposure or duration of exposure (2, 4, 6, 8, 10 min) to 2-phenoxyethanol. The ability of teleosts to regulate plasma osmolality over a wide range of salinities indicates their degree of ‘physiological euryhalinity’. Plasma osmolality of juveniles exposed to 5, 12 and 35 psu was measured every two weeks over a total of six weeks. Although juveniles were able to regulate plasma osmolality over the duration of the experiment, plasma osmolality at 5 and 12 psu was significantly lower than in fish maintained at 35 psu. Growth is used as an indicator of the relative energy used for osmoregulation at different salinities, as the energy used for osmoregulation becomes unavailable for growth. A nineweek growth experiment was conducted on juveniles exposed to 5, 12 and 35 psu. Juveniles grew and survived at all three salinities. However, growth of juveniles at 5 psu was significantly lower than at 12 and 35 psu. Other than a significantly greater weight gain at 35 psu relative to 12 psu, there was no significant difference in specific growth and length gain between juveniles at 12 and 35 psu. Food conversion ratio and condition factor at 12 and 35 psu were not significantly different, but food conversion ratio and condition factor at 5 psu was significantly greater and lower than at 35 psu respectively. In fish, gills are considered the major organ involved in osmoregulation. Within the gills, chloride cells are the predominant site of ion exchange which is driven by the Na⁺, K⁺- ATPase enzyme. Gill samples of juveniles exposed to 5, 12 and 35 psu for six weeks were examined histologically using light microscopy. Chloride cells of juveniles maintained at 5 psu were significantly more abundant than in juveniles at 12 and 35 psu. Chloride cells of juveniles at 5 psu were significantly larger than in juveniles kept at 12 psu, but not significantly different to those of juveniles kept at 35 psu. The ability of the juvenile fish to regulate plasma osmolality indicates that they are 'physiologically euryhaline', but the reduced growth and proliferation of chloride cells at 5 psu suggests that energy expenditure for osmoregulation is increased at hypoosmotic salinities. Salinity induced physiological responses could therefore not explain the natural distribution of early juvenile dusky kob and it is proposed that other environmental factors (e.g. temperature) are also important. It is also hypothesised that the high conductivity of an estuary in South Africa, to which our understanding is limited, may negate the effect of reduced salinity. Although freshwater input into estuaries is an important factor, further investigations to explain the distribution and abundance of early juveniles is required to make management recommendations. Dusky kob is also becoming an increasingly popular aquaculture species in South Africa. In this regard, early juvenile dusky kob can be grown at salinities as low as 12 psu without negatively affecting growth and production.

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Lazo, Juan Pablo. "Development of the digestive system in red drum (Sciaenops ocellatus) larvae /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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Williams, Christopher D. "Investigations into cataract formation in sciaenid fish species from the Elizabeth River, Chesapeake Bay, Virginia." W&M ScholarWorks, 1994. https://scholarworks.wm.edu/etd/1539616904.

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Cataract formation in the Elizabeth River (ER) has been reported since 1986. Previous studies have concentrated on describing cataract as a function of exposure to polluted sediments, especially polycyclic aromatic hydrocarbons (PAH). These studies, however, have not examined what processes might be involved in fish cataractogenesis. The overall objective of this research was to identify important processes associated with the early development of cataract in feral fish populations. Field studies were used to systematically examine cataract development. Cataract in sciaenids was not associated with previously described cataractogenic factors, but could be linked to contaminated sediments of the ER. Cataract was highly prevalent, first appeared at the visible center of the lens, varied in the degree opacification (&<&10-100%), could be classified into stages of development (stage 1-4), and inhibited lens growth. Furthermore, data showed that a positive association existed between bottom water temperatures (&\sp\circ&C) and cataract prevalence. Biochemical comparison of lenses revealed that the water content, cholesterol level, and free fatty acid composition were significantly elevated, total esters reduced, while no significant changes occurred in the protein composition of lenses with early cataract development. These data suggest that altered plasma membrane permeability might be involved in opacification. Investigations of cataract in fish at the cellular level have not been studied due to the absence of a reliable in vitro model. Protocols were established for the primary culture, successful passage (45 subcultures), and the long-term maintenance (54 months) of spot lens epithelial cells. Cells exhibited certain morphological characteristics, crystallin-protein composition, and chromosome complement indicative of epithelial cell differentiation and cell-line transformation. In vitro experiments indicated that both DNA and RNA indices were positively associated with cataract development in spot lenses. Results suggested that high molecular weight PAH may play a role in interfering with the mitotic cycle of epithelial cells. These results suggest that lens epithelial cells are disturbed and may be involved in the initial steps of cataractogenesis. In conclusion, results demonstrate that cataract development is associated with high levels of contamination found in the ER. Altered membrane permeability and epithelial cell function may play a key role in cataract initiation.

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Horodysky, Andrij Z. "Comparative sensory and energetic ecology of sciaenid fishes and their competitors in Chesapeake Bay, VA." W&M ScholarWorks, 2009. https://scholarworks.wm.edu/etd/1539616699.

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Coastal fishes of the western North Atlantic, such as sciaenids and their competitors, support substantial commercial and recreational fisheries in waters that may vary widely in temperature, salinity, light intensity and spectral distrubution, and dissolved oxygen levels, yet their ecophysiological abilities to cope with such variability have received little attention. I therefore applied multidisciplinary comparative techniques to investigate aspects of the sensory and energetic ecophysiology of several sciaenid fishes and non-sciaenid competitors common in the western North Atlantic. Auditory brainstem response experiments demonstrated that sciaenid fishes have greatest auditory sensitivity at low frequencies that match their vocalizations. Based upon both anatomy and auditory bandwidths, most sciaenids appear to be hearing generalists that are likely sensitive to the particle motion components of aquatic sounds. Electroretinographic experiments revealed that the luminous sensitivities, temporal properties, and chromatic characteristics of the visual systems of phylogenetically-similar sciaenid fishes from different microhabitats, and those of phylogenetically-dissimilar piscivores from similar microhabitats, all correlated with lifestyle and ecology. The eyes of benthic and nocturnal fishes were typified by high luminous sensitivity, slow temporal resolution, and relative diel-invariance, consistent with foraging in dim photoclimates. By contrast, the eyes of pelagic diurnal piscivores had comparatively lower luminous sensitivity, higher temporal resolution, and exhibited higher diel variation, consistent with specific diurnal light niches. Accordingly, visually-foraging diurnal piscivores may be disadvantaged in eutrophied, turbid waters characteristic of many modern estuaries. Intermittent-flow respirometry experiments revealed that the majority of sciaenid fishes had resting and active metabolic rates similar to those of most teleost fishes but significantly lower than high-demand species such as tunas. However, the metabolic rates of kingfishes (Menticirrhus sp.) were significantly higher than other sciaenids, but significantly lower than those of tunalike fishes. Estimates of standard metabolic rate from power performance curves fitted to active metabolic rate data did not differ significantly from experimentally-derived measurements in static chambers, validating the experimental approach. Data from these chapters were analyzed with linear repeated measures and nonlinear mixed effects models that considered repeated measurement of subjects, modeled within-individual correlations, and the included random factors that improved the scope of inference. Although not novel approaches, these methods demonstrate quantitative advancements for future analyses of physiological data comprised of multiple measurements taken from individual experimental subjects. Collectively, the results of this dissertation underscore the potential power and utility of physiological techniques to provide a wide variety of information that may complement more traditional techniques used in fisheries science, particularly when coupled with appropriate analytical strategies. Sciaenid fishes are model organisms for investigations of the links between form, function, and the environment in coastal ecosystems.

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Книги з теми "Sciaenids"

Barquero, Rodolfo Sánchez. Biología pesquera de las corvinas, familia Sciaenidae en lagunas costeras de la Región Autónoma Atlántico Sur, Nicaragua. Laguna de Perlas, Nicaragua: Proyecto para el Desarrollo Integral de la Pesca Artesanal en la Región Autónoma Atlántico Sur, Nicaragua, 2001.

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Schwarzhans, Werner. A comparative morphological treatise of recent and fossil otoliths of the family Sciaenidae (Perciformes). München: Verlag F. Pfeil, 1993.

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Chogi p'yŏngjŏn: Hwanghae munmyŏngkwŏn ŭi tokt'ŭk han ŏŏp munhwa rŭl ch'angch'ul han ŏnŭ mulkogi iyagi. Sŏul T'ŭkpyŏlsi: Pada Wi ŭi Chŏngwŏn, 2021.

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1952-, Na Sŭng-man, ed. Sŏhae wa chogi. Sŏul-si: Kyŏngin Munhwasa, 2008.

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Ditty, James G. Preliminary guide to the identification of the early life history stages of sciaenid fishes from the western central Atlantic. Miami, Fla: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Southeast Fisheries Science Center, 1994.

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Sŏhae wa Yŏnp'yŏngdo. Sŏul: Minsogwŏn, 2011.

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Standard, Gary W. Reproduction, movements, and population dynamics of the banded drum, Larimus fasciatus, in the Gulf of Mexico. College Station, Tex: Sea Grant College Program, Texas A & M University, 1985.

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Red drum aquaculture (1987 Corpus Christi, Texas). Red drum aquaculture: Proceedings of a symposium on the culture of red drum and other warm water fishes, Corpus Christi, Texas, U.S.A., June 22-24,1987. Edited by Arnold C. R, Holt G. J, Thomas P, and University of Texas at Austin. Marine Science Institute. Port Aransas, Tex: University of Texas at Austin Marine Science Institute, 1988.

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Chogi ŭi Han'guksa: Pada esŏ papsang kkaji chogi rodŭ e ŏlk'in mat innŭn yŏksa. Kyŏnggi-do P'aju-si: P'urŭn Tŭllyŏk, 2020.

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Частини книг з теми "Sciaenids"

Ye, Huagu, Chuyuan Li, Wencai Ye, Feiyan Zeng, Fangfang Liu, Yuanyuan Liu, Faguo Wang, Yushi Ye, Lin Fu, and Jianrong Li. "Medicinal Angiosperms of Myrmeleontidae, Elapidae, Sciaenidae, Canidae, Vespertilionidae, Cheloniidae, Pteriidae, Tabanidae, Manidae, and Gekkonidae." In Common Chinese Materia Medica, 65–83. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-5924-9_5.

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Vieira, Manuel, Paulo J. Fonseca, and M. Clara P. Amorim. "Effect of Boat Noise on Chorusing Behavior of a Marine Fish (Argyrosomus regius, Sciaenidae)." In The Effects of Noise on Aquatic Life, 1–8. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-10417-6_176-1.

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Lever, Christopher. "Sciaenidae." In Naturalized Fishes of the World, 244–45. Elsevier, 1996. http://dx.doi.org/10.1016/b978-012444745-5/50029-6.

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"Sciaenidae." In Fishes of the Gulf of Mexico, Volume 2, 410–46. University of Texas Press, 2006. http://dx.doi.org/10.7560/706347-039.

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Wallus, Robert. "Family Sciaenidae." In Reproductive Biology and Early Life History of Fishes in the Ohio River Drainage, 277–302. CRC Press, 2006. http://dx.doi.org/10.1201/9781420003604.ch15.

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"sciaenid, n. & adj." In Oxford English Dictionary. 3rd ed. Oxford University Press, 2023. http://dx.doi.org/10.1093/oed/7562435083.

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"sciaenoid, adj. & n." In Oxford English Dictionary. 3rd ed. Oxford University Press, 2023. http://dx.doi.org/10.1093/oed/4263967099.

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"CHAPTER 3 CROAKERS (SCIAENIDAE) AND GRUNTS (HAEMULIDAE)." In Texas Seafood, 39–48. University of Texas Press, 2019. http://dx.doi.org/10.7560/318034-005.

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"Age Determination and Growth of Spotted Seatrout, Cynoscion nebulosus (Pisces: Sciaenidae)." In Biology of the Spotted Seatrout, 55–70. CRC Press, 2002. http://dx.doi.org/10.1201/9781420040791-8.

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Murphy, Michael, and Robert McMichael. "Age Determination and Growth of Spotted Seatrout, Cynoscion nebulosus (Pisces Sciaenidae)." In Marine Biology, 41–56. CRC Press, 2002. http://dx.doi.org/10.1201/9781420040791.ch5.

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Тези доповідей конференцій з теми "Sciaenids"

Ruiz-Blais, Sebastian, Mario R. Rivera-Chavarria, and Arturo Camacho. "Autonomous detection of neotropical sciaenid fishes." In 164th Meeting of the Acoustical Society of America. ASA, 2013. http://dx.doi.org/10.1121/1.4792734.

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Ruiz-Blais, Sebastian, Arturo Camacho, and Mario R. Rivera-Chavarria. "Sound-based automatic neotropical sciaenid fishes identification: Cynoscion jamaicensis." In 167th Meeting of the Acoustical Society of America. Acoustical Society of America, 2014. http://dx.doi.org/10.1121/1.4893791.

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Salas, Andria K., Preston S. Wilson, and Lee A. Fuiman. "Predicting pressure sensitivity through ontogeny in larval red drum (Sciaenops ocellatus)." In 5th International Conference on the Effects of Noise on Aquatic Life. ASA, 2019. http://dx.doi.org/10.1121/2.0001098.

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"Relationship Between Body Size And Otolith Morphology Of Three Species Of Family Sciaenidae From The Coast Of Pakistan." In International Conference on Biological Research and Applied Science. Jinnah University for Women, Karachi,Pakistan, 2022. http://dx.doi.org/10.37962/ibras/2022/299-300.

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"COMPARATIVE ANALYSIS BETWEEN BODY SIZE AND WEIGHT OF JOHNIUS CAROUNA (PERCIFORMES: SCIAENIDAE) WITH OTOLITH SIZE AND MASS, FROM THE COASTAL WATERS OF PAKISTAN." In 3rd INTERNATIONAL CONFERENCE ON BIOLOGICAL RESEARCH AND APPLIED SCIENCE. Jinnah University for Women, Karachi,Pakistan, 2023. http://dx.doi.org/10.37962/ibras/2023/98-99.

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