Journal articles on the topic 'Lotic fauna'
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Vilenica, Marina, Miran Katar, Toni Koren, and Ana Štih Koren. "Dragonfly fauna (Insecta: Odonata) of Papuk Nature Park, Croatia." Natura Croatica 31, no. 2 (December 30, 2022): 351–64. http://dx.doi.org/10.20302/nc.2022.31.25.
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Odonata is an amphibious insect order constituting an important link between aquatic and terrestrial habitats. Members of the group are widely used as bioindicators of freshwater habitat health. The Odonata fauna of a total of 44 freshwater habitats in the wider area of Papuk Nature Park was investigated in the spring and summer of 2017 and 2019. Twenty-three lotic and 21 lentic habitats were included in the study. We recorded 39 Odonata species, witha higher species richness (i.e. 35) documented at lentic than at lotic habitats (i.e. 16 species). Calopteryx virgo was the most widespread species in the area, while Aeshna affinis, Epitheca bimaculata, and Sympetrum meridionale were the rarest. The most frequently recorded species at lentic sites were Platycnemis pennipes, Coenagrion puella, and Ischnura elegans, while Calopteryx virgo, Onychogomphus forcipatus, and Cordulegaster bidenatata were the most common species in lotic habitats. Although we recorded numerous anthropogenic pressures in freshwater habitats in the Park, 11 recorded species are of conservation concern, which highlights the conservation value of aquatic habitats in the study area. Our results represent the first Odonata checklist of Papuk Nature Park, and as such, they are an important contribution to our knowledge of the Odonata fauna and species distribution in Croatia.
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Lima, Luciano B., Aline J. Santos, and Dilermando P. Lima Junior. "Fish fauna in tributaries of the Suiá-Miçú River (upper Xingu river basin), in the Cerrado-Amazon transition zone, eastern state of Mato Grosso, Brazil." Check List 13, no. 3 (May 28, 2017): 2130. http://dx.doi.org/10.15560/13.3.2130.
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Studies on the fish fauna of the Xingu river basin are mainly concentrated in the main channel of the river or its large tributaries, due to requirements all faunal surveys in hydroelectric power plant projects. Our goal was to conduct a survey of the composition of fish fauna in headwater streams (lotic environments) and small reservoirs (artificial lentic environments) built on these streams in the upper Xingu River region. Fish were sampled in the dry period, July 2013, using active sampling methods in a 100 meter-section at each sampling site. We recorded the occurrence of 33 species of five orders and 16 families. Characiformes was the most species-rich order, with 19 species, followed by Siluriformes, Gymnotiformes and Perciformes, with four species each.
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Bănăduc, Doru, and Angela Curtean-Bănăduc. "The “Porţile de Fier/Iron Gates” Nature Park (Romania) Some Danube Northern Tributaries Fish Fauna." Transylvanian Review of Systematical and Ecological Research 16, no. 3 (December 1, 2014): 165–70. http://dx.doi.org/10.1515/trser-2015-0040.
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Abstract The relative larger size of the Berzasca River, respectively the relatively constant environmental conditions, with relatively stenotopic ichthyocenosis, suffered small qualitative and quantitative fish fauna modifications in time, compared to the smaller rivers such as Sirinia, Liubcova/Oreviţa and Mraconia. The Danube “Iron Gates” I Lake influences the lower sectors of the studied rivers in term of fish species exchange. The accidental droughts in the karstic zones of the studied lotic sectors have a negative influence on the spatial continuity of the local fish fauna, and the climate change can increase these influence in the future. All the studied rivers play an important role for the near Danube “Iron Gates” I Lake lotic fish species of small-medium size, as reproduction and shelter habitats.
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Acosta, AA, J. Queiroz, H. Brandão, and RJ Silva. "Helminth fauna of Astyanax fasciatus Cuvier, 1819, in two distinct sites of the Taquari River, São Paulo State, Brazil." Brazilian Journal of Biology 75, no. 1 (March 2015): 242–50. http://dx.doi.org/10.1590/1519-6984.15113.
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This study assessed the helminth fauna of Astyanax fasciatus in two distinct sites of the Taquari River, São Paulo State, with 30 individuals sampled in a lotic site and 30 in a lentic site, recording the monogeneans: Cacatuocotyle paranaensis, Characithecium costaricensis, Diaphorocleidus kabatai, Jainus sp., Notozothecium sp. and Gyrodactylus sp., the digenean Antorchis lintoni and no-identified metacercariae; the nematode Procamallanus (Spirocamallanus) inopinatus and no-identified larvae. The mean abundances of total monogeneans (U = 1053; p = 0.042) and C. costaricensis (U = 1107; p = 0.005) were higher in the lotic site. This difference may be due to the higher density of the host population in the lotic site, and the water transparence in lentic environments that prevents A. fasciatus to form shoals, precluding the exchange of parasites with direct cycle within a host population. This study is the first report of the helminth fauna of A. fasciatus in the Taquari River, with ten taxa recorded, and reports A. fasciatus as a new host for Notozothecium sp. and C. paranaensis.
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Roughley, R. E., and D. J. Larson. "AQUATIC COLEOPTERA OF SPRINGS IN CANADA." Memoirs of the Entomological Society of Canada 123, S155 (1991): 125–40. http://dx.doi.org/10.4039/entm123155125-1.
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AbstractThe habitat preferences of each of the 663 species of aquatic Coleoptera known from Canada and Alaska were categorized as lentic, lotic, spring-inhabiting, other, or unknown. Most species were assigned to a single habitat type although some occur in more than one habitat. The distribution of species among these habitat types is as follows: lentic, 61%; lotic, 23%; springs, 8%; other, <1%, unknown, 8%. The 63 spring-inhabiting species are distributed among the families Dytiscidae (38 species), Hydrophilidae (nine), Hydraenidae (eight), Chrysomelidae (subfamily Donaciinae) (six), Haliplidae (one), and Dryopidae (one). The diversity of these families in springs only approximately parallels their diversity in the total fauna. Several relatively diverse families (Gyrinidae, Scirtidae, and Curculionidae) are absent from springs as are some predominantly lotic families (Amphizoidae, Elmidae, and Psephenidae). About half the spring species are western (occurring in Manitoba and west), about a quarter are eastern, and a quarter are transcontinental. Most of these spring species are known from the conterminous United States and it is suggested that spring habitats within Canada are being colonized slowly from southern refugia.The habitat affinities of spring-inhabiting Dytiscidae are examined in detail. Of the 260 species occurring in Canada, 38 species occur in springs and represent about 60% of all beetle species in Canadian springs. The spring fauna of dytiscids comprises four elements: nine (24%) inhabit springs only, 11 (29%) are lotic species that also occur in springs, 12 (31%) are species that use a broad range of habitats, and six (16%) are species known otherwise only from lentic habitats. The dytiscid fauna of springs is a heterogeneous assemblage derived from many separate phylogenetic elements.
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CIANFICCONI, FERNANDA, CARLA CORALLINI, GIANANDREA LA PORTA, and BARBARA TODINI. "Trichopteran fauna in a region of Central Italy: Lazio." Zoosymposia 5, no. 1 (June 10, 2011): 41–62. http://dx.doi.org/10.11646/zoosymposia.5.1.4.
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The first list of Trichoptera from the Lazio region is reported. It is the result of research carried out from 1942-1979 in 23 hypogean cavities and from 1961-2000 in 25 lotic (52 sampling sites) and 17 lentic (24 sampling sites) biotopes. The lotic biotopes include hygropetric habitats, springs, streams, rivers and canals; the lentic biotopes include lakes of different origins and mountain pools. Ninety-one species and 7 subspecies from 18 families were collected. Forty-two species of different ecological categories are found only in lotic biotopes, 18 only in lentic biotopes and 7 species of Stenophylacinae only in hypogean cavities. The species belong to several chorological categories. Eighteen species and 7 subspecies are endemic to the Italian fauna. Six of these are limited to the regions of the Central Apennines, including Apatania volscorum Moretti, Cianficconi & Papagno exclusive to Lazio (Posta Fibreno Lake), Drusus aprutiensis Moretti endemic only to Lazio and Abruzzo, D. camerinus Moretti only to Lazio, Marche and Umbria, Glossosoma serravalle Malicky & Graf to Lazio (Velino River) and to Umbria and Marche (Nera River), Potamophylax cingulatus inermis Moretti & Cianficconi to Lazio, Abruzzo, Umbria and Marche, Allogamus antennatus ausoniae Moretti to Lazio, Abruzzo, Molise, Umbria and Marche. The presence of Chimarra marginata (L.) in the Mignone River is noteworthy because it is a rare species in Italy.
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C. Chessman, Bruce, and Simon A. Williams. "Biodiversity and conservation of river macroinvertebrates on an expanding urban fringe: western Sydney, New South Wales, Australia." Pacific Conservation Biology 5, no. 1 (1999): 36. http://dx.doi.org/10.1071/pc990036.
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As in many growing urban areas, the prevention of environmental damage as Sydney spreads westward into the Hawkesbury-Nepean River basin is a major challenge for planners, managers and the local community, We surveyed macroinvertebrates at 45 river and stream sites in April-June 1996, and reviewed data from other sources, in order to assess the issues involved in conservation of the lotic macro invertebrate fauna, Regional richness is high with 443 recorded species and morphospecies, Cluster analysis showed community pattems related mainly to waterway size (separating the Hawkesbury-Nepean River from tributary streams), geology (tributaries on shale or sandstone), tidal intrusion and urbanization (impoverished faunas in urban streams). The ability of genus richness of mites and major insect orders to reflect overall genus richness at a site was limited, and Diptera and Trichoptera appear to have the greatest value as biodiversity predictors. Urban expansion is the major threat to lotic macro invertebrate communities in the region, but agriculture, flow regulation, sand and gravel ex1raction and introduced species have probably also impacted on the fauna, Streams with high conservation value for macroinvertebrates include those few on the Cumberland Plain and surrounding slopes that retain substantial indigenous vegetation in relatively undeveloped catchments. The Hawkesbury-Nepean River sfill harbours a rich faunal community and is also important for conservation, The development of effective strategies for conservation assessment and management is problematic for several reasons, Some species in the region are known to be vulnerable, but the status of most cannot be assessed because of a lack of taxonomic and zoogeographic information, Most "biodiversity indicator" concepts are of dubious value for aquatic macroinvertebrate conservation. A multi-faceted management approach emphasizing subcatchment reserves, riparian restoration and the control of threatening processes is required.
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Bretschko, G. "The lotic fauna in water-logged sediments beyond the waterline in the canalized Danube." River Systems 11, no. 3 (December 20, 1999): 413–21. http://dx.doi.org/10.1127/lr/11/1999/413.
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Clifford, Hugh F., Gillian M. Wiley, and Richard J. Casey. "Macroinvertebrates of a beaver-altered boreal stream of Alberta, Canada, with special reference to the fauna on the dams." Canadian Journal of Zoology 71, no. 7 (July 1, 1993): 1439–47. http://dx.doi.org/10.1139/z93-199.
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There were different macroinvertebrate assemblages on the face of and in beaver dams compared with beaver ponds and main stream sites. The beaver dam featured a large proportion of simuliid larvae compared with the main stream sites of this stream and with areas of other studies of beaver-altered streams. The fauna of the dams was typical of fast-flowing habitats, whereas animals of the main stream sites (including the beaver ponds) were more characteristic of slow-flowing or lentic habitats. Cluster analysis separated the dam and main stream sites for each sampling date and year of our study based on the composition of the macroinvertebrates. Although the invertebrate assemblages of the dams differed from those of the main stream sites, both habitats included similar functional feeding groups, except for a shredder found only at the dams. There are similarities between the beaver dam fauna and the faunas of debris dams, woody snags, and lake outlets. Beaver dams are important in supporting large populations of simuliids and generally in maintaining a lotic fauna in slow-moving, low-gradient boreal streams.
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İlhan, Ali, Hasan Musa Sarı, and Irmak Kurtul. "Fish fauna of Bakırçay Stream (North Eagean, Turkey)." Ege Journal of Fisheries and Aquatic Sciences 37, no. 3 (September 15, 2020): 309–12. http://dx.doi.org/10.12714/egejfas.37.3.14.
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This study was carried out to determine the current fish fauna of Bakırçay River in seasonal periods between 2017 and 2018. Sampling was carried out in 15 different locations, 11 lotic and 4 lentic location from the small streams of source of the river to the downstream region. The sampling was performed with “Samus 725 G” model electroshock in lotic habitats; with standard fishing-nets which was “TS EN 14757 Water Quality” in lentic habitats. As a result of the study, the presence of 17 taxa from 7 families including Anguillidae, Atherinidae, Cobitidae, Cyprinidae, Nemacheilidae, Poecilidae and Gobiidae were determined. Mugilidae family members and Salaria pavo species, which were previously reported within the stream, were not obtained in our study. However, the presence of 6 species, namely Atherina boyeri, Cyprinus carpio, Carassius gibelio, Oxynemacheilus teophili, Gambusia holbrooki and Knipowitschia caucasica species were found in this study for the first time. Cyprinidae family with 11 taxa was the biggest family in terms of species diversity in the river basin. Anguillidae, Atherinidae, Cobitidae, Nemacheilidae, Poecilidae and Gobiidae families are represented by one taxon. In order to protect the river's biodiversity and to maintain fishing activities effectively, the pollution sources should be overcomed firstly. In order to protect the biodiversity of the river and to maintain fishing activities effectively, first of all, pollution sources and exotic fish species that may have negative effects on the natural fish fauna of the basin should be bring under control. In addition, it will also be useful to organize events to inform local governments and community about the importance and protection of aquatic environments.
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Oliveira, AK, F. Apone, JLO Birindelli, and JC Garavello. "Fish assemblage structure of the Ipanema River, a small lotic environment partially protected by a Conservation Unit in southeastern Brazil." Brazilian Journal of Biology 73, no. 2 (May 2013): 259–70. http://dx.doi.org/10.1590/s1519-69842013000200006.
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A study on the fish assemblage of the Ipanema River, a small affluent of the Tietê River basin in southeastern Brazil, was performed aiming to look for structural patterns of species diversity in small lowland lotic environments. Fish samplings were performed every two months from June 2003 to April 2004 at four sample sites located on the lower stretch of the river. Local assemblage showed to be species rich, with fifty-two species belonging to Characiformes (25 spp.), Siluriformes (19 spp.), Cyprinodontiformes (3 spp.), Gymnotiformes (2 spp.), Perciformes (2 spp.), and Synbranchiformes (1 sp.). Fish fauna was composed of small-sized species (<200 mm SL) and by individuals of medium (up to 400 mm SL) to large (more than 400 mm SL) sized species. The Ipanema River, such as other small lotic transitional environments in the upper Paraná River drainage, is considered important for conservation of fish fauna because they cover available habitats for persistent populations of small-sized species and for non-persistent individuals or shoals of medium and large-sized fish species, which occupy other habitats along their life-history (e. g. floodplains, oxbow lakes, main channel of great rivers). The importance of the Ipanema River basin for fish fauna conservation is also reinforced by the fact that it is located in a highly impacted region of southeastern Brazil, near the São Paulo metropolitan area.
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Salimi, Behnam, Iraj Mobedi, Haghighi Khiabanian, and Mehdi Soltani. "On the diversity of leeches (Annelida: Hirudina) in the fresh waters of Kurdistan province, Iran." Archives of Biological Sciences 63, no. 3 (2011): 837–40. http://dx.doi.org/10.2298/abs1103837s.
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Lotic and lentic environments, including basins, throughout Kurdistan province, Iran, were surveyed for the presence of leeches from June 2009 until June 2010. In view of the geographical location of Iran, a very rich fauna of leeches should be expected. For each of the species collected, the new locality records are given, followed by the global pattern of distribution. In addition, taxonomic notes are provided for some species. In total seven species of leeches were found in this region. All species repeated in the present paper are new and found in the fresh water fauna of Kurdistan, Iran.
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Bănăduc, Doru, Alexandru Sas, Kevin Cianfaglione, Sophia Barinova, and Angela Curtean-Bănăduc. "The Role of Aquatic Refuge Habitats for Fish, and Threats in the Context of Climate Change and Human Impact, during Seasonal Hydrological Drought in the Saxon Villages Area (Transylvania, Romania)." Atmosphere 12, no. 9 (September 16, 2021): 1209. http://dx.doi.org/10.3390/atmos12091209.
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In spite of the obvious climate changes effects on the Carpathian Basin hydrographic nets fish fauna, studies on their potential refuge habitats in drought periods are scarce. Multiannual (2016–2021) research of fish in some streams located in the Saxon Villages area during hydrological drought periods identified, mapped, and revealed the refuge aquatic habitats presence, management needs, and importance for fish diversity and abundance for small rivers. The impact of increasing global temperature and other human activities induced hydrologic net and habitats alteration, decreased the refuge habitats needed by freshwater fish, diminished the fish abundance, and influenced the spatial and temporal variation in fish assemblage structure in the studied area. The sites more than one meter in depth in the studied lotic system were inventoried and all 500 m of these lotic systems were also checked to see what species and how many individuals were present, and if there is was difference in their abundance between refuge and non-refuge 500 m sectors. The scarce number of these refuges due to relatively high soil erosion and clogging in those basins and the cumulative effects of other human types of impact induced a high degree of pressure on the fish fauna. Overall, it reduced the role of these lotic systems as a refuge and for reproduction for the fish of downstream Târnava Mare River, into which all of them flow. Management elements were proposed to maintain and improve these refuges’ ecological support capacity.
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Staicu, Gabriela. "The significance of macrophyte—phytophilous fauna from lotic and lentic ecosystems (Romania)." SIL Proceedings, 1922-2010 27, no. 7 (September 2001): 3852–55. http://dx.doi.org/10.1080/03680770.1998.11901706.
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Dehghani, Rouhullah, Iran Zarghi, Mahbobeh Aboutalebi, Zohreh Barzegari, and Maryam Ghanbari. "Fauna and habitat of aquatic arthropods of Kashan in 2010." Bangladesh Journal of Medical Science 13, no. 3 (June 6, 2014): 306–10. http://dx.doi.org/10.3329/bjms.v13i3.15448.
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Background: Given the importance of arthropods in medical and life sciences and information on the composition of such arthropods in this study was conducted during 2010 in the Kashan. Methods: Descriptive study and sampling at 13 locations and over 39 times in 2303 on the number of larvae, nymphs, Pupa and adults were collected from Lentic and Lotic waters. Samples collected after the transfer to the laboratory using a Stereo microscope and identified using morphological keys used were identified. Results: Total 2303 samples over 39 times the sampling of the Order Diptera, with 1,287 cases (55.8%), crustaceans, with 579 samples (25.2%), Order Trichoptera with 158 samples (6.9%), Order Ephemeroptera 153 samples (6.7%), Order Odonata with 61 samples (2.6%), Order Heteroptera with 26 samples (1.1%), Order Coleoptera with 26 samples (1.1%), Order Plecoptera with 13 sample (0.6) were identified. From Crustacea Class, three orders of the, Amphipoda to 405 numbers (70%) of Lotic water, Ostracoda to 144 (24.9%), Copepoda to 30 (5.1%) from the Lentic waters was collect-ed. Conclusion: In This study, for the first time, from Crustacea subphyllum, order of Ostracoda and Diptera order, Ceratopogonidae, Eryphidae, Dixidae families are reported .Therefore can be concluded that the aquatic arthropods Fauna Kashan is very rich. Considering that some of these insects have a role in the transmission or harassment of human and environmental balance are important, and with molecular methods is recommended that more specific studies done in this field. DOI: http://dx.doi.org/10.3329/bjms.v13i3.15448 Bangladesh Journal of Medical Science Vol.13(3) 2014 p.306-310
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Rice, S. P., M. T. Greenwood, and C. B. Joyce. "Tributaries, sediment sources, and the longitudinal organisation of macroinvertebrate fauna along river systems." Canadian Journal of Fisheries and Aquatic Sciences 58, no. 4 (April 1, 2001): 824–40. http://dx.doi.org/10.1139/f01-022.
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Tributary confluences are sites along a main channel where, because of the introduction of water and (or) sediment, the water volume, bed sediment character, and water quality of the mainstream can change abruptly. These shifts ensure that abiotic gradients seldom vary smoothly or continuously for distances of more than 100102 km along any river system. The ways in which tributaries and related sediment recruitment points structure longitudinal changes in physical habitat are examined. Variables of importance to stream biota are affected and, in turn, it is suggested that the arrangement of tributaries and related features is an important control on the longitudinal organisation of macroinvertebrate benthos at moderate spatial scales. A new model is presented that stresses the importance of hydrological and sedimentological networks for organising lotic fauna. The link discontinuity concept emphasises the discontinuous nature of lotic ecosystem gradients, addresses the importance of tributaries in unregulated as well as regulated rivers, and extends, to its logical conclusion, the limited recognition of tributary influence in the river continuum concept. A case study from British Columbia, Canada, illustrates the general merit of the new model.
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Vilenica, Marina, Mario Rumišek, Fran Rebrina, Renata Matoničkin Kepčija, Kristian Medak, Vesna Gulin, and Andreja Brigić. "Dinaric karst intermittent rivers harbour some rare mayflies (Insecta, Ephemeroptera)." Natura Croatica 30, no. 2 (December 31, 2021): 377–87. http://dx.doi.org/10.20302/nc.2021.30.24.
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While investigating the aquatic macroinvertebrate fauna of four intermittent Dinaric karst rivers in Croatia, we confirmed or recorded new distribution data and ecological features for several mayfly species rare in Croatian freshwater habitats: Nigrobaetis niger (Linnaeus, 1761), Procloeon pennulatum (Eaton, 1870) and Paraleptophlebia werneri Ulmer, 1920. To our knowledge, this is the first record of N. niger in intermittent lotic habitats. We discuss their substrate preferences in the studied habitats as well as their relationships with measured physico-chemical water parameters. The newly obtained results confirm that our knowledge about Croatian mayfly fauna and species ecological requirements in intermittent Mediterranean rivers is still incomplete and is increasing with systematic studies.
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Reice, Seth R., and Robert L. Edwards. "The effect of vertebrate predation on lotic macroinvertebrate communities in Québec, Canada." Canadian Journal of Zoology 64, no. 9 (September 1, 1986): 1930–36. http://dx.doi.org/10.1139/z86-290.
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To test the role of vertebrate predation on benthic community structure, experiments were performed in two third-order streams in northern Québec, Canada. Predators were either enclosed in or excluded from replicate benthic cages (20 × 30 × 10 cm). Ruisseau du Cran Carré (RCC) has a normal complement of fish, while Low Hope Creek (LHC) is fishless. In June 1983, two species of fish were manipulated (one fish per cage, five replicate cages per treatment) in RCC, while the salamander Eurycea bislineata was manipulated in LHC. In August 1983, brook trout fry were manipulated in both streams. It was anticipated that the fauna in LHC, having had no previous contact with fish, would be more susceptible to fish predation than the fauna of RCC. Gut analysis revealed that fish did feed in the cages. However, neither fish predation nor salamander predation had significant effects on prey communities in either stream in June. Community parameters (species richness and diversity, and total numbers of individuals) were not influenced by the presence or absence of fish or salamanders. In August, three-quarters of the taxa were more abundant without trout than with trout. However, few individual taxa were significantly affected by the fish. This effect was similar in both streams. By enclosing fish in a fishless stream, this experiment was designed to enhance the possible effects offish predation on the lotic macrobenthic community. This work strengthens the idea that brook trout are not major structuring agents of the macrobenthic communities of small streams.
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Silva, Fabio Laurindo da, Sofia Wiedenbrug, and Brian Dorsey Farrell. "A preliminary survey of the non-biting midges (Diptera: Chironomidae) of the Dominican Republic." CHIRONOMUS Journal of Chironomidae Research, no. 28 (December 22, 2015): 12. http://dx.doi.org/10.5324/cjcr.v0i28.1925.
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<p>Chironomidae (Diptera) are among the most diverse and widespread aquatic insects, with roughly 5,500 described species. However, prior to the present work, no species of Chironomidae had been documented from the island of Hispaniola. Collections of non-biting midges, with emphasis on the lotic fauna, were made in the Dominican Republic during July of 2015. In total, 578 specimens belonging to 27 genera and at least 44 species within the subfamilies Chironominae (20 taxa), Orthocladiinae (16 taxa) and Tanypodinae (8 taxa) were found. The subfamilies Chironominae and Orthocladiinae predominated. Polypedilum was the most widespread and diverse genus of Chironominae. Metriocnemus were collected in bromeliad tanks. The chironomid fauna in Dominican Republic includes multiple genera with worldwide distributions, including Holarctic and Neotropical components.</p>
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Landry, Bernard, and P. P. Harper. "THE AQUATIC DANCE FLY FAUNA OF A SUBARCTIC RIVER SYSTEM IN QUÉBEC, WITH THE DESCRIPTION OF A NEW SPECIES OF HEMERODROMIA (DIPTERA: EMPIDIDAE)." Canadian Entomologist 117, no. 11 (November 1985): 1379–86. http://dx.doi.org/10.4039/ent1171379-11.
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AbstractAs part of a preimpoundment baseline study in the James Bay Hydroelectric Project in Northwestern Québec, systematic collections of aquatic insects were made in 1974 and 1975 in lakes and streams of the Rivière du Castor drainage. The aquatic Empididae are reported on here: they comprise 12 species, one of which is new (Hemerodromia fibrina n. sp.). Except for the boreal Metachela albipes, the fauna is remarkably temperate in character and composition. Emergence patterns are similar, though foreshortened, to those observed in southern Québec, and there are no bivoltine species. Most species are lotic and many thrive in fast waters (Neoplasm scapularis, Roederiodes recurvatus), but there is nevertheless a distinct lacustrine fauna (H. fibrina and perhaps also Chelifera rastrifera). The bog stations harbored only the widespread Chelifera palloris.
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Baekken, T., and K. J. Aanes. "Pesticides in Norwegian agriculture. Their effects on benthic fauna in lotic environments. Preliminary results." SIL Proceedings, 1922-2010 24, no. 4 (September 1991): 2277–81. http://dx.doi.org/10.1080/03680770.1989.11899943.
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Bretschko, G. "The lotic fauna in water-logged sediments beyond the waterline in the canalized Danube." SIL Proceedings, 1922-2010 27, no. 7 (September 2001): 3942. http://dx.doi.org/10.1080/03680770.1998.11901729.
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Yanai, Zohar, Jean-Luc Gattolliat, and Netta Dorchin. "Taxonomy of Baetis Leach in Israel (Ephemeroptera, Baetidae)." ZooKeys 794 (November 1, 2018): 45–84. http://dx.doi.org/10.3897/zookeys.794.28214.
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The taxonomy and systematics of the genusBaetisLeach (Ephemeroptera: Baetidae) in Israel is clarified for the first time as part of an ongoing comprehensive survey of the Israeli mayfly fauna. Six clearly defined species are currently recognized in Israel, four of which are described here as new to science. The validity of all species is supported by a molecular analysis of the mitochondrial COI gene. A key for the identification of the Israeli species based on the nymphal stage is provided, as well as data on their distribution patterns and ecology. The local fauna represents four Palearctic species groups, three of which reach their limit of distribution range in Israel.Baetisspecies typically inhabit lotic, pristine habitats in northern Israel, with few exceptions for some species that can be found in the Dead Sea area or in ephemeral ponds.
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Corrêa, Bernardo Ramos Simões, Murilo Luiz e. Castro Santana, Lilian de Castro Moraes Pinto, Fernanda Nunes de Araujo Fonseca, Carlos Alberto da Cruz Junior, and Rodrigo Diana Navarro. "Evaluation of ichthyofauna in lotic and lentic environments in the Araguaia River basin, Cerrado Biome, Brazil." Acta Scientiarum. Biological Sciences 44 (July 28, 2022): e61005. http://dx.doi.org/10.4025/actascibiolsci.v44i1.61005.
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The Araguaia River is an important watercourse located in Central Brazil and well known for its diversity of fish fauna. Differences between landscape and resources in the distinct environments existing in a floodplain can determine the success of a species. This study presents a list of ichthyofauna species found in lentic and lotic environments in the floodplain of the Araguaia River basin, bordering Mato Grosso and Goiás States. We carried out sampling in July 2019, during the dry season, using diverse fish collection strategies, such as waiting nets, trawl, cast net and fishing rods. Were distributed 12 sampling points between lentic and lotic environments and we captured a total of 168 individuals of 42 species, 19 families and six orders. The predominant orders were Characiformes, Siluriformes and Cichliformes, while the families were Serrasalmidae, Characidae, Triportheidae, Curimatidae and Anostomidae. The genera Triportheus, Psectrogaster and Moenkhausia were the most abundant, while Pimelodus was the most dispersed. Results showed greater abundance and diversity in the lentic environment than in the lotic one, with top-of-the-chain species in both. The variance between environments and the presence of species that are endemic, recently described, of undefined taxonomic status, and bioindicators, highlight the importance of conserving and further studying the ichthyofauna in the Araguaia River basin.
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Uvira, V., G. Bretschko, and W. Waitzbauer. "Gravel bars in low-order streams: (B) lotic and terrestrial fauna (Ritrodat-Lunz study area)." SIL Proceedings, 1922-2010 27, no. 3 (November 2000): 1616–21. http://dx.doi.org/10.1080/03680770.1998.11901512.
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de Silva, K. H. G. M., and P. K. de Silva. "The effects of human modification of lotic habitats on the freshwater fauna of Sri Lanka." SIL Communications, 1953-1996 24, no. 1 (January 1994): 87–94. http://dx.doi.org/10.1080/05384680.1994.11904028.
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Serafim Jr., M., F. A. Lansac-Tôha, J. C. Paggi, L. F. M. Velho, and B. Robertson. "Cladocera fauna composition in a river-lagoon system of the upper Paraná River floodplain, with a new record for Brazil." Brazilian Journal of Biology 63, no. 2 (May 2003): 349–56. http://dx.doi.org/10.1590/s1519-69842003000200020.
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Cladocera communities were studied in lotic and lentic environments of the Upper Paraná River floodplain, State of Mato Grosso do Sul, Brazil. A total of 63 species of Cladocera were identified in 108 samples. Of these, 24 species are considered new records for that floodplain, and one is a new record for Brazil. Chydoridae was the most representative family with 19 genera and 39 species.
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Segura, MO, AA Fonseca-Gessner, MR Spies, and AE Siegloch. "Water beetles in mountainous regions in southeastern Brazil." Brazilian Journal of Biology 72, no. 2 (May 2012): 311–21. http://dx.doi.org/10.1590/s1519-69842012000200012.
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Inventories provide information on the state of biodiversity at a site or for a geographic region. Species inventories are the basis for systematic study and critical to ecology, biogeography and identification of biological indicators and key species. They also provide key information for assessments of environmental change, for natural resource conservation or recovery of degraded ecosystems. Thus, inventories play a key role in planning strategies for conservation and sustainable use. This study aimed to inventory the fauna of water beetles, larvae and adults, in two mountainous regions in the state of São Paulo, in Serra da Mantiqueira (Parque Estadual de Campos do Jordão and Pindamonhangaba region) and in Serra do Mar (Santa Virgínia and Picinguaba Divisions) as well as to generate information about the habitats used by the different genera recorded. Specimens were collected in lotic and lentic systems, between the years 2005 to 2010. In total 14,492 specimens were collected and 16 families and 50 genera of Coleoptera were identified. This study in mountainous regions showed a significant portion of the faunal composition of South America and the state of São Paulo. The composition of the fauna, in terms of richness and abundance by family, indicated the predominance of Elmidae, followed by Hydrophilidae and Dytiscidae. Despite the diversity found, the results of estimated richness indicated the need for additional sampling effort for both regions, since the curves of estimated richness did not reach an asymptote, suggesting that new species can be found in future surveys.
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Fedorova, Lyudmila I., and Irina A. Kaygorodova. "First data on the Hirudinea fauna of lotic ecosystems of the Khanty-Mansi Autonomous Area (Russia)." ZooKeys 1082 (January 19, 2022): 73–85. http://dx.doi.org/10.3897/zookeys.1082.71859.
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Hirudinea, a small and ecologically important group of aquatic organisms, is poorly studied in northern Eurasia. In this study, we demyth the idea of the faunistic poverty of this region and present the first findings of rheophilic leeches from the Khanty-Mansi Autonomous Area, Russia. Investigation of 25 rivers (Severnaya Sosva, Ob, Konda-Irtysh, and Bolshoi Yugan river basins) resulted in finding 10 leech species with parasitic and non-parasitic life strategies. These species belong to two orders (Rhynchobdellida and Arhynchobdellida), three families (Glossiphoniidae, Piscicolidae, and Erpobdellidae) and six genera (Alboglossiphonia, Glossiphonia, Helobdella, Hemiclepsis, Piscicola, and Erpobdella). Five species, A. hyalina, G. verrucata, E. monostriata, E. vilnensis, and potentially new morphological species of piscine leeches Piscicola sp., have been discovered for the first time in Western Siberia. Data on species diversity of rheophilic leeches include the exact systematic position for all leech taxa. Each species from the list is supplemented with information about its geographical distribution.
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Watson, Charles N., and Michael W. Heyn. "A preliminary survey of the Chironomidae (Diptera) of Costa Rica, with emphasis on the lotic fauna." Netherlands Journal of Aquatic Ecology 26, no. 2-4 (June 1992): 257–62. http://dx.doi.org/10.1007/bf02255249.
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Machado, Vanessa de Souza, Cecilia Volkmer-Ribeiro, and Roberto Iannuzzi. "Inventary of the Sponge Fauna of the cemitério Paleolake, Catalão, Goiás, Brazil." Anais da Academia Brasileira de Ciências 84, no. 1 (March 2012): 17–34. http://dx.doi.org/10.1590/s0001-37652012000100004.
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The Cemitério Paleolake, Catalão, Goiás, is a lacustrine deposit that is rich in spicules of continental sponges. These spicules, which are present in three sections (1-3), were analyzed for the taxonomic identification of the species in order to reconstruct the late Quaternary palaeoenvironment. An indigenous assemblage of lentic sponges was found, consisting of Metania spinata (Carter 1881), Dosilia pydanieli Volkmer-Ribeiro (1992), Radiospongilla amazonensis Volkmer-Ribeiro and Maciel (1983), Trochospongilla variabilis Bonetto and Ezcurra de Drago (1973), Corvomeyenia thumi (Traxler 1895), Heterorotula fistula Volkmer-Ribeiro and Motta (1995), plus Corvoheteromeyenia australis (Bonetto and Ezcurra de Drago 1966), which here has its first record in an assemblage formed by biosiliceous deposits. Furthermore, at the base of the sections, spicules of sponges from lotic environments were detected, including Corvospongilla seckti Bonetto and Ezcurra de Drago (1966), Oncosclera navicella (Carter 1881) and Eunapius fragilis (Leidy 1851), which suggests a contribution from flowing water. We identified 25 spongofacies horizons caused by sponge assemblages typical of a lentic environment, dated from at least 39,700 years BP., and currently occurring in lakes typical of the Cerrado Biome.
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Sousa, Francisco Diogo Rocha, and Lourdes Maria Abdu Elmoor-Loureiro. "Cladocerans (Crustacea: Anomopoda and Ctenopoda) of the Sempre Vivas National Park, Espinhaço Range, Minas Gerais, Brazil." Check List 9, no. 1 (February 1, 2013): 4. http://dx.doi.org/10.15560/9.1.4.
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Protected areas are designed to maintain environmental conditions that favor the occurrence of a wide variety of taxa. However, few studies have devoted attention to inventories of biota in these areas. In this study, we provide a checklist of cladocerans for the poorly studied Sempre Vivas National Park, Minas Gerais state. Samples were collected in lotic and lentic environments, with a total of 27 species being recorded and the highest contribution coming from the Chydoridae family (21 spp.). Minas Gerais state is widely studied in relation to cladoceran fauna; nevertheless, the results indicate three new records. The genus Monospilus was reported for the first time in the Neotropical region.
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Alves, Roberto da Gama, Mercedes Rosa Marchese, and Suzana Cunha Escarpinati. "Oligochaeta (Annelida, Clitellata) in lotic environments in the state of São Paulo, Brazil." Iheringia. Série Zoologia 96, no. 4 (December 30, 2006): 431–35. http://dx.doi.org/10.1590/s0073-47212006000400007.
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Despite the importance of Oligochaeta to the dynamics of aquatic ecosystems and to studies of the biology of pollution, there is currently a dearth of information on this group's ecology in Brazil. The aim of this study was to describe the Oligochaeta fauna in four watercourses - three urban and one rural - in the state of São Paulo: the Pinheirinho stream, the Água Branca stream, the Monjolinho River and the Gouveia stream, respectively. Sediment samples were taken with a Van Veen grab in two areas from each watercourse, during the summer and winter of 2001. In all collection areas, measurements of the pH, electrical conductivity, dissolved oxygen and turbidity of the water were made with a Horiba U-10 device. Principal component analysis showed that axes 1 and 2 explained 68.18% of the results' variability, with the first axis predominantly associated with the granulometric data and the second one with the limnological data. Cluster analysis indicated that area II of the Monjolinho River differed from the other collection sites. In the present study, the Oligochaeta group was represented by Tubificidae, Naididae, Alluroididae, Narapidae and Enchytraeidae. Among the three species of Tubificidae, Limnodrilus hoffmeisteri Claparede, 1862, was the most abundant and most frequent species. The results provided important information on the ecology and distribution of limnic Oligochaeta.
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Shaffer, H. Bradley, Robert F. Inger, Guan-Fu Wu, and Er-Mi Zhao. "Morphological variation and ecological distribution of co-occurring larval forms of Oreolalax (Anura: Pelobatidae)." Amphibia-Reptilia 15, no. 2 (1994): 109–21. http://dx.doi.org/10.1163/156853894x00227.
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AbstractThe amphibian fauna of Sichuan Province, China, is remarkable for the large number of species of pelobatid frogs, of which species of Oreolalax form a large portion. We have collected larvae of five species of Oreolalax on Mt. Emei, Sichuan, four of these five at a second locality 40 km from Mt. Emei, and larvae of two additional species at a locality 200 km S of Mt. Emei. These tadpoles are very similar to one another morphologically, a conclusion supported by multivariate analysis. We give diagnostic descriptions and a key for the identification of these seven larval forms. All tadpoles of Oreolalax have lotic habits, and the seven species in our study live in small to medium-sized streams (maximum width 8 m). These species show only moderate ecological segregation in terms of stream size and microhabitat type.
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Davis, JA, SA Harrington, and JA Friend. "Invetebrate communities of Relict streams in the Arid Zone: the George Gill Range, Central Australia." Marine and Freshwater Research 44, no. 3 (1993): 483. http://dx.doi.org/10.1071/mf9930483.
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The George Gill Range (24�S,132�E) 220 km south west of Alice Springs in the Northern Territory, lies within one of the driest regions of Australia. Diel and seasonal temperature differences are extreme and the average rainfall is 250 mm per annum. The streams of the Range are the largest group within the Central Ranges and are relatively pristine. Their flow regimes are episodic but deep rock pools appear to act as reservoirs of surface runoff and may also receive groundwater from the Mereenie aquifer. The waterbodies of the Range and some nearby areas were sampled in July and December 1986 to determine the composition of the macroinvertebrate communities and biogeographical relationships with the fauna of lotic systems elsewhere in Australia. Macroinvertebrate species richness at the Range was comparable with that of other Australian streams but no Plecoptera, Isopoda or Amphipoda were collected. The almost complete absence of shredders may reflect low allochthonous inputs, because riparian vegetation in the arid zone is generally sparse. A small proportion of the fauna of the Range appears to be a relictual stream fauna. Species of low vagility such as the waterpenny, Sclerocyphon fuscus, would not be capable of dispersal across the large tracts of arid land that now separate the Range from southern Australia, where it is also found. The occurrence of new species at the Range suggests that it is also a site of allopatric speciation within some groups. The conservation values of the streams of the George Gill Range and other sites, such as Giles Springs in the Chewings Range, are extremely high. They represent unique aquatic communities of both ecological and evolutionary importance in the arid zone.
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Ivković, Marija, and Lara Ivanković. "The genus Dixa (Diptera, Dixidae) in Croatian lotic habitats, with a checklist of species and relationships with the fauna of neighbouring countries." ZooKeys 867 (July 29, 2019): 45–54. http://dx.doi.org/10.3897/zookeys.867.36613.
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Invertebrate surveys in Croatia conducted between 2005 and 2018 included 39 sampling sites yielding bycatch samples of Dixidae (Diptera). All records of this family from the territory of Croatia are summarized, including previously unpublished data. Collections contained six species of Dixa Meigen – D.dilatata Strobl, D.maculata Meigen, D.nebulosa Meigen, D.nubilipennis Curtis, D.puberula Loew, and D.submaculata Edwards, with Dixadilatata reported from Croatia for the first time. Information relating to the ecoregions in which species were found and specific species traits are provided. Compared to neighbouring countries, the Croatian species assemblage is most similar to the fauna of Italy and least similar to that of Serbia and Montenegro.
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Rodrigues, Luciana Falci Theza, Felipe Silveira Leite, and Roberto da Gama Alves. "Inventory and distribution of Oligochaeta (Annelida, Clitellata) in first-order streams in preserved areas of the state of Minas Gerais, Brazil." Biota Neotropica 13, no. 1 (March 2013): 245–54. http://dx.doi.org/10.1590/s1676-06032013000100024.
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Data resulting from species inventories shed light on the richness and distribution of various groups. In Minas Gerais, work on inventory and distribution of the oligochaetes of lotic environments in preserved areas are non-existent. Therefore, this study aimed to inventory the limnic oligochaetes fauna of first-order streams located in four preserved areas, to expand knowledge of the ecology and distribution of this group. In total, 19 taxa were inventoried, belonging to the families Naididae and Enchytraeidae and the superorder Megadrili (earthworms), with the genus Pristina having the largest number of species. The number of species found in this investigation corresponds to 22% of oligochaetes species recorded in Brazilian aquatic environments. The results obtained add important knowledge of the distribution of some oligochaetes species in Brazil, represent the first records of species for the four preserved areas studied and confirm the first occurrence of various species in the state.
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CIANFICCONI, FERNANDA, CARLA CORALLINI, FRANCESCO TUCCIARELLI, and MARIA CLARA BICCHIERAI. "The genus Hydroptila Dalman 1819 in Italy: Ecology and morphology." Zoosymposia 10, no. 1 (August 9, 2016): 117–47. http://dx.doi.org/10.11646/zoosymposia.10.1.11.
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The 27 Hydroptila species listed as of 2012 in Italy were found in 434 biotopes located in lotic and lentic waters of the Italian mainland regions and islands (Sicilia, Sardegna, Capraia, Elba). The richest regions are Umbria (15 species), Toscana and Piemonte. The most widespread species are H. vectis, found in18 regions and H. angulata found in 16 regions. Hydroptila fiorii, H. serrata and H. cortensis were found only in Sardegna, the latter only in one site. Hydroptila tacheti was found only in Friuli-Venezia Giulia. No Hydroptila species were found in Valle d’Aosta. Four species are endemic to the Italian fauna (H. cortensis, H. fiorii, H. ruffoi, H. stellifera). The main ecological parameters of Hydroptila spp. collection sites are discussed. The organization of scent organs in male H. aegyptia was examined by means of light and electron microscopy. Finally, an updated catalogue of the Italian species is reported.
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Acosta, Aline Angelina, Jamile Queiroz, Heleno Brandão, Edmir Daniel Carvalho, and Reinaldo Jose da Silva. "Helminths of Steindachnerina insculptain two distinct stretches of the Taquari River, state of São Paulo, Brazil." Revista Brasileira de Parasitologia Veterinária 22, no. 4 (December 2013): 539–47. http://dx.doi.org/10.1590/s1984-29612013000400014.
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The purpose of this study was to evaluate the helminth fauna of Steindachnerina insculpta in the Taquari River, a tributary of the Jurumirim reservoir in the state of São Paulo, and to investigate whether some helminth species may act as a bioindicator of environmental impact. The host fish sample was composed of 60 specimens, with 30 individuals sampled in a lotic stretch and 30 in a lentic stretch. The following were found: the monogeneans Anacanthoroides mizelli, Diaphorocleidus kabatai, Urocleidoides sp. and Euryhaliotrema chaoi; the digenean Sphincterodiplostomum musculosum and unidentified metacercariae; the nematode Travnema travnema and unidentified larvae; and the acanthocephalan Gorytocephalus plecostomorum. The total prevalence of monogeneans (z = 3.14; p = 0.002) and A. mizelli (z = 3.879; p ≤ 0.001), as well as the mean abundance of total monogeneans (U = 642.0; p ≤ 0.001) and A. mizelli (U = 623.5; p ≤ 0.001), were higher in the lentic stretch. Steindachnerina insculpta and its monogeneans comprise a potential group that could be used to investigate environmental impact, as demonstrated in this study.
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Nilsson, Anders, and Sven Persson. "Taxonomy, distribution and habitats of the Dytiscidae (Coleoptera) of Ethiopia." Entomologica Fennica 4, no. 2 (June 1, 1993): 57–94. http://dx.doi.org/10.33338/ef.83753.
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The 168 species of Dytiscidae known from Ethiopia are listed. For each species are given: original citation, synonyms, gross distribution, and distribution in Ethiopia with special reference to altitude and provinces. Besides literature records and museum specimens, 7300 individuals of 53 species collected by the junior author chiefly in the Arssi highlands in 1988 and 1989 are reported on. One syn. n. is presented: Rhantus longulus Regimbart, 1895 = Rhantus flavicollis Regimbart, 1887. Most of the 38 species endemic to Ethiopia occur only over 2000 m a.s.l., and the proportion of endemic species is highest in the Gondar, Shoa, Arssi and Bale provinces. The fauna of most provinces is poorly known. The Shoa province is best known, with 92 species recorded. In the Arssi highlands, the maximum local diversity was near 20 species in both lentic and lotic biotopes. The species richness of different supraspecific taxa is discussed and information is presented on co-occurrence of congeneric species and proportions of rare and frequent species.
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LANSAC-TÔHA, F. A., L. F. M. VELHO, J. HIGUTI, and E. M. TAKAHASHI. "Cyclopidae (Crustacea, Copepoda) from the upper Paraná River floodplain, Brazil." Brazilian Journal of Biology 62, no. 1 (February 2002): 125–33. http://dx.doi.org/10.1590/s1519-69842002000100015.
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Cyclopid copepods from samples of fauna associated with aquatic macrophytes and plancton obtained in lotic and lentic environments were obtained from the upper Paraná River floodplain (in the states of Paraná and Mato Grosso do Sul, Brazil). Macrophytes were collected in homogeneous stands and washed. Plankton samples, taken from the water column surface and bottom, were obtained using a motor pump, with a 70 mum mesh plankton net for filtration. Twelve taxa of Cyclopidae were identified. Among them, Macrocyclops albidus albidus, Paracyclops chiltoni, Ectocyclops rubescens, Homocyclops ater, Eucyclops solitarius, Mesocyclops longisetus curvatus, Mesocyclops ogunnus, and Microcyclops finitimus were new finds for this floodplain. Eight species were recorded exclusively in aquatic macrophyte samples. Among these species, M. albidus albidus and M. finitimus presented greatest abundances. Only four species were recorded in plankton samples, and Thermocyclops minutus and Thermocyclops decipiens are limited to this type of habitat. Among these four species, T. minutus is the most abundant, especially in lentic habitats.
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Seidu, Issah, Collins Ayine Nsor, Emmanuel Danquah, Paul Tehoda, and Samuel K. Oppong. "Patterns of Odonata Assemblages in Lotic and Lentic Systems in the Ankasa Conservation Area, Ghana." International Journal of Zoology 2019 (February 10, 2019): 1–14. http://dx.doi.org/10.1155/2019/3094787.
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Our study examined Odonata assemblages distribution pattern and the predictive factors that accounted for this in the lotic and lentic water systems within the Ankasa Conservation Area (Ghana). A total of 23 sites with sampling protocol of 2 researchers per hour per sampling site were used to survey Odonata species over two seasons in the three water bodies (streams, rivers, and ponds). Broken stick model, individual-based rarefaction, and Renyi diversity ordering were employed to quantify community assemblages. Ordination technique was also used to determine the Odonata-environmental relationship. A total of 1403 individuals, belonging to 47 species (22 Zygoptera and 25 Anisoptera) in six families, were recorded. Species richness (Hc = 3.414, p = 0.169) and diversity (Hc = 1.661, p = 0.44) generally did not differ among the three water systems. However, from individual sites, ponds appeared mostly diverse (α-scale = 0.04, Renyi index (r) = 5.86 to α = 3.5, r = 3.12), in spite of their lowest species abundance and richness. At the suborder level, ponds equally exhibited the highest Anisoptera species richness (9.90 ± SE 0.640) compared with Zygopterans (0.80± SE 0.291). Overall, Anisopterans (K= 16.51, p= 0.00026) and Zygopterans richness (K= 16.39, p= 0.00023) differed significantly among the three subsystems, while Odonata composition also differed significantly among the various water bodies (ANOSIM: global R= 0.94, p<0.001). Flow rate, water temperature, channel width, and turbidity were the key predictive factors that influence the structure of Odonata species assemblages. The results highlight the need to improve the functional status of the lentic and lotic systems, with the ultimate goal of conserving diverse Odonata fauna and other sympatric freshwater biodiversity.
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Tupinambás, Taynan H., Marcos Callisto, and Gilmar B. Santos. "Benthic macroinvertebrate assemblages structure in two headwater streams, south-eastern Brazil." Revista Brasileira de Zoologia 24, no. 4 (December 2007): 887–97. http://dx.doi.org/10.1590/s0101-81752007000400005.
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From December 2003 to September 2004, benthic macroinvertebrates (BM), fishes, water and sediment were collected quarterly at six stations in two streams of the upper São Francisco River basin, south-eastern Brazil. We evaluated the ecological conditions, habitat diversity, water quality, composition and structure of BM communities, as well as the food habits of the local fish fauna. By applying a protocol for rapid characterization of ecological conditions and habitat diversity, three of the sampled localities were classified as "pristine" while the others stations were considered "altered". A well oxygenated water with near neutral pH and low electric conductivity (< 0.01 mS/cm) and nutrient concentrations (< 0.08 mg/l total P and < 0.90 mg/l total N) was found for both streams. Sediment analysis revealed the dominance of medium, fine and very fine sand fractions in all sampled areas. The organic matter content in the sediment was higher in the lotic and well preserved area. We found 45 BM taxa, and Chironomidae (68%), Oligochaeta (10%) and Elmidae (8.5%) showed the highest abundances. From the stomach contents analysis of 13 fish species, 26 BM taxa were found, including four that were not collected in the sediment samples, being Chironomidae the dominant group (> 60%). Our results show that human activities such as forest clearing, agriculture and cattle rising have altered the habitat diversity in freshwater ecosystems in a process that affects the aquatic biota and thus the food availability to the fish fauna. The results also highlight the importance of the fish stomach contents analysis as a complementary tool in BM inventories.
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Bagatini, Yara Moretto, Rosilene Luciana Delariva, and Janet Higuti. "Benthic macroinvertebrate community structure in a stream of the north-west region of Paraná State, Brazil." Biota Neotropica 12, no. 1 (March 2012): 307–17. http://dx.doi.org/10.1590/s1676-06032012000100023.
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This study aimed to survey the benthic macroinvertebrate fauna of a first order stream located in an agricultural area, and to assess the environmental factors involved in the spatial distribution of this community. Invertebrates were gathered in November 2007 at three sampling sites distributed along the Itiz Stream, located in Marialva municipality, Paraná State. At each site, we measured the physical and chemical variables of the water, and then took four samples, using Surber sampler. In order to evaluate the differences in density, richness, diversity and evenness, we employed an ANOVA and a DCA to summarize biotic data. The invertebrates were categorized into functional groups and the BMWP score was applied to calculate the biological integrity of the environment. The faunal composition was represented by 103 taxa distributed across five phyla, of which the highest occurrence was of arthropods, especially insects. Higher density values were observed for Chironomidae, Ephemeroptera, Coleoptera and Trichoptera. The richness, diversity and density, as well as the density of gathering-collectors, were higher in the intermediate course of the stream. The distribution pattern of the taxa was mainly influenced by lentic or lotic characteristics of the sampled sites and microhabitats, as evidenced by the DCA. The BMWP indices indicated that the three sampling sites presented scores of excellent and good water quality. In the Itiz Stream, the presence of preserved marginal vegetation and the distance from urban centers that generate pollution, combined with peculiarities of each sampling site, influenced the structure of the benthic community.
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Costa, Lucas de Souza Machado, Ciro César Zanini Branco, and Pitágoras da Conceição Bispo. "O Papel dos Fatores Ambientais e Espaciais Sobre a Fauna de Ephemeroptera (Insecta) em Riachos de Mata Atlântica." EntomoBrasilis 7, no. 2 (August 14, 2014): 86–92. http://dx.doi.org/10.12741/ebrasilis.v7i2.368.
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Ephemeroptera de 23 riachos foram amostrados a fim de avaliar a influencia dos fatores ambientais e espaciais sobre a fauna. Uma regressão parcial para abundância e riqueza e uma Análise de Redundância parcial para composição foram usadas com o objetivo de particionar os efeitos específicos do ambiente e do espaço. As variáveis espaciais foram obtidas usando o método PCNM considerando as distâncias através da matriz terrestre e ao longo do ambiente lótico. Considerando respectivamente as distâncias terrestres e aquáticas, o ambiente explicou 11,4% e uma porção não significativa da abundância, o ambiente indissociável do espaço explicou 20,8% e 31,7% e o espaço 27,5% e 31,7%. A riqueza, independentemente do tipo de matriz de distância utilizada, não foi explicada por nenhum dos componentes. Por outro lado, os fatores ambientais explicaram 19,5% e 12,6% da composição baseada na abundância, e 17,1% e 11,6% baseada em dados de incidência, considerando respectivamente as distâncias terrestres e aquáticas, em ambos os casos o espaço não foi significativo. Nossos resultados sugerem que para Ephemeroptera: 1) o tamanho do riacho pode ser um bom preditor da abundância total, mas não da riqueza; 2) a fauna se enquadra no modelo de metacomunidade Species Sorting e a dispersão é suficiente para manutenção da possibilidade dos táxons chegarem aos diferentes riachos, nos quais o estabelecimento é determinado pela combinação de fatores locais.The Role of Environmental and Spatial Factors on the Fauna of Ephemeroptera (Insecta) in Atlantic Forest Streams
Abstract. Ephemeroptera of 23 streams were sampled in order to evaluate the influence of environmental and spatial factors on the fauna. A multiple partial regression to abundance and richness and a partial Redundancy Analyses to composition were used with the aim to partition the specific effects of the environment and space. The spatial variables were obtained using the PCNM method considering both, the distance through the overland matrix and along the lotic environment. Considering respectively overland and aquatic distances, the environment explained 11.4% and a not significant portion of abundance, the environment undistinguishable from space explained 20.8% and 31.7% and the space 27.5 % and 31.7%. The richness, independent of type of distance matrix used, were not explained by any of the components. On the other hand, the environmental factors explained 19.5% and 12.6% of composition based on abundance, and 17.1% and 11.6% based on incidence, considering respectively overland and aquatic distances, in both cases the space did not significant. Our results suggest that to Ephemeroptera: 1) the size of stream can be a good predictor of total abundance, but it not true for richness; 2) the fauna fits the Species Sorting metacommunity model and the dispersion is sufficient to maintain the possibillity of taxa arrive at different streams, in which the establishment it is determined by combination of local factors.
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chib, Anchal, and Shvetambri Jasrotia. "Status and Scope of Conventional Morphometry and its Integration with Bar Coding in Jammu and Kashmir (J&K) Fisheries." Current World Environment 17, no. 3 (December 30, 2022): 765–94. http://dx.doi.org/10.12944/cwe.17.3.23.
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Correct identification is at the core of taxonomy. Although morphometric characterization is the most straightforward and cost-effective method, it has a number of limitations. By overcoming this limitation, bar coding of mitochondrial cytochrome c oxidase gene (COI) helps in accurate and cost-effective identification of fish species. This communication discusses limitations of conventional morphometry and how its integration with bar coding can help to solve the taxonomic ambiguity of morphologically similar species. Along with that information, different water bodies from J&K region have been analysed with special reference to fish diversity which revealed that the diversity is more in Jammu region as compared to Kashmir, due to favourable climatic conditions and larger number of lotic water bodies and also the fact that the integrated approach has been successfully adopted in Kashmir valley,contributing to accurate identification of fish fauna. There is a lot of room for research in this area as bar coding of fishes has just become popular in the Jammu region, despite its immaturity. This will aid in a better knowledge of the region's fish ecology, the preservation of the gene pool, and the rise of economically significant species.
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GARCIA, DIEGO AZEVEDO ZOCCAL, ANA PAULA VIDOTTO-MAGNONI, ALEXANDRO DERLY AUGUSTO COSTA, ARMANDO CÉSAR RODRIGUES CASIMIRO, LUCAS RIBEIRO JARDULI, JOÃO DANIEL FERRAZ, FERNANDA SIMÕES DE ALMEIDA, and MÁRIO LUÍS ORSI. "Importance of the Congonhas River for the conservation of the fish fauna of the Upper Paraná basin, Brazil." Biodiversitas Journal of Biological Diversity 20, no. 2 (February 16, 2019): 474–81. http://dx.doi.org/10.13057/biodiv/d200225.
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Abstract. Garcia DAZ, Vidotto-Magnoni AP, Costa ADA, Casimiro ACR, Jarduli LR, Ferraz JD, De Almeida FS, Orsi ML. 2019. Importance of the Congonhas River for the conservation of the fish fauna of the Upper Paraná basin, Brazil. Biodiversitas 20: 474-481. The Upper Paraná River basin is among the most fragmented watersheds in the world. The Congonhas River belongs to this drainage system, which has its mouth in the Capivara Reservoir and can be considered the largest tributary free-from-dam, becoming important for the maintenance of fish species richness. In order to know more about the species present in this tributary, we aimed to provide an inventory of fish fauna of the Congonhas River and reproductive strategies to determine whether the river is used by migratory species and whether there is a longitudinal variation in the fish assembly. These findings will provide subsidies to contribute to the implementation of policies to protect biodiversity. Samplings occurred in the upper, middle and lower stretches of the Congonhas River during four periods between 1991 and 2011. Fishes were captured using gill nets from 2 to 14 cm mesh sizes between opposite knots and cast nets, identified and categorized according to their reproductive strategies. A total of 4,640 individuals belonging to 63 species, of which 79.4% consisted of Characiformes and Siluriformes were captured. Furthermore, 14% of fish were long-distance migratory species (e.g., Piaractus mesopotamicus, Megaleporinus obtusidens, Prochilodus lineatus, Salminus brasiliensis, Pinirampus pirinampu, and Pseudoplatystoma corruscans). In addition, there was an increase in the fish species richness from upstream to downstream. Management actions such as prohibition of fishing, rehabilitation of riparian vegetation, and protection of the basin against dam construction will reduce anthropogenic impacts on the ecosystem. The Congonhas River highlights the importance of preserving lotic environmental for the conservation of migratory and non-migratory Neotropical fish diversity into a heavily modified watershed.
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Agostinho, AA, FM Pelicice, and LC Gomes. "Dams and the fish fauna of the Neotropical region: impacts and management related to diversity and fisheries." Brazilian Journal of Biology 68, no. 4 suppl (November 2008): 1119–32. http://dx.doi.org/10.1590/s1519-69842008000500019.
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Reservoirs have been built in almost all of the hydrographic basins of Brazil. Their purposes include water supply for cities, irrigation and mainly, generation of electricity. There are more than 700 large dams and associated reservoirs in the large rivers of the country. These reservoirs favor local and regional economic development, but they also bring serious and irreversible alterations in the natural hydrologic regime of rivers, affecting habitat quality and the dynamics of the biota. In the impounded area, the main impact is the change from lotic to lentic water, which influences aquatic fauna, including fishes. Impacts of reservoirs present relevant spatiotemporal variations. Immediately after reservoir formation, fish species richness usually increases due to incorporation of surrounding habitats, but richness decreases as reservoirs age. However, impacts downstream of dams appear to be similar or stronger than those that occur within the reservoir. Dams promote discharge control, altering the seasonal cycles of floods. These effects are augmented when dams are constructed in cascades. Therefore, dams profoundly influence composition and structure of fish assemblages. Most affected species are the rheophilics and long distance migratory that require distinct habitats to fulfill their life cycles. Populations of migratory species may collapse or even disappear in intensely regulated stretches. Management actions taken to minimize impacts of dams in Brazil historically considered construction of fish passages, fishery control and stocking. The results of these actions are questionable and/or with clear failures. In this paper, we give emphasis to the Paraná River basin, the most affected by dams in Brazil. We describe some patterns in the alteration and decline in fish diversity in areas influenced by dams. We also discuss negative consequences in the fishery and ecosystems functioning. Finally, we argue the relevance and the success of the management actions taken and present some suggestions to improve conservation of the ichthyofauna in South American basins influenced by dams.
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Vilenica, Marina, and Zlatko Mihaljević. "Odonata Assemblages in Anthropogenically Impacted Habitats in the Drava River—A Long-Term Study." Water 14, no. 19 (October 3, 2022): 3119. http://dx.doi.org/10.3390/w14193119.
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Lotic freshwater ecosystems are among the most threatened ecosystems worldwide due to the effects of multiple stressors, such as intensive land use in their catchments, morphological alterations, flow regulation, pollution, and climate change. Odonata are often used as valuable indicators of ecological integrity and anthropogenic disturbance of freshwater habitats. Here, we present the results of a study on Odonata assemblages in anthropogenically impacted habitats (hydropower plant reservoirs, tailrace canals, drainage ditches, and old river channels) conducted over a nine-year period. The negative impacts of anthropogenic activities on inhabiting biota were confirmed—with only 11 species recorded, the Odonata assemblages were species-poor and had low population densities. Although most species recorded were generalists, some species of national conservation concern were detected. Among the physico-chemical water parameters, the concentrations of ammonium, orthophosphates, nitrates, and mineral oils in the water were found to be the most important determinants of Odonata assemblages. The preservation of near-natural sites in the vicinity of anthropogenically impacted and man-made habitats is important for maintaining the local Odonata fauna and for the preservation of rare species. Our results highlight the importance of long-term data for determining the occurrence of Odonata species and monitoring their population dynamics.
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Mesa, Leticia M., María Celina Reynaga, Marcela del V. Correa, and Martín G. Sirombra. "Effects of anthropogenic impacts on benthic macroinvertebrates assemblages in subtropical mountain streams." Iheringia. Série Zoologia 103, no. 4 (December 2013): 342–49. http://dx.doi.org/10.1590/s0073-47212013000400002.
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The nature of the riparian and surrounding landscape has been modified by anthropogenic activities, which may subsequently alter the composition and functional structure of macroinvertebrate assemblages. The effect of these changes on function of benthic fauna is difficult to assess due to the scarce knowledge on functional structures in tropical streams. In this study we evaluate whether sites impacted and unimpacted by anthropogenic alterations differed in assemblage composition and density, richness and diversity of each functional feeding group. The selection of the sites was related to their distinct riparian characteristics, following the QBRy riparian quality index. Collector-gatherer was the dominant functional feeding group, comprising 91% of total density, whereas the proportion of shredders was very low, representing less of 0.5% of total density. Asemblage composition of macroinvertebrates differed between impacted and unimpacted sites. Predators were dominant in taxa number, representing about 60% of total taxa richness. In addition, the diversity and richness of collector-gatherers differed significantly between degraded and unimpacted sites, reflecting the sensitivity of this group to environmental changes and the utility to be used in the assessment of anthropogenic modifications. The results of this study reinforce the idea that riparian corridor management is critical for the distribution of macroinvertebrate assemblages as well as functional organization of lotic streams.