scholarly journals Ichthyofauna of two reservoirs in the middle Acaraú river basin, Ceará, Northeastern Brazil

Check List ◽  
2013 ◽  
Vol 9 (6) ◽  
pp. 1391 ◽  
Author(s):  
Ronaldo César Gurgel-Lourenço ◽  
Wallace Alves de Sousa ◽  
Jorge Iván Sánchez-Botero ◽  
Danielle Sequeira Garcez
Keyword(s):  
River Basin ◽  
Fish Assemblage ◽  
Fish Fauna ◽  
Mesh Size ◽  
Dry Season ◽  
Northeastern Brazil ◽  
Resources Management ◽  
Future Studies ◽  
Fishing Resources ◽  
Rivers And Reservoirs

Few studies have been published on the taxonomy, biology and ecology of the fish fauna of the rivers and reservoirs from the Brazilian Caatinga. Considering the importance of fish surveys as subsidies for future studies and fishing resources management, the purpose of the present study was to assess the fish assemblage of the two largest reservoirs in the middle Acaraú river basin, the Paulo Sarasate and the Edson Queiroz reservoirs, state of Ceará, Northeastern Brazil. Eight nycthemeral samplings were performed with gillnets (mesh size ranging from 3 to 12 cm between opposite knots) during rainy and dry season between 2010 and 2012. We captured 1,626 specimens belonging to three orders, nine families and 17 species, six of which are endemic to the Caatinga. Approximately 30% of the species observed were non-native and had been introduced for stocking purposes.

scholarly journals Diet seasonality and food overlap of the fish assemblage in a pantanal pond

2008 ◽  
Vol 6 (4) ◽  
pp. 567-576 ◽  
Author(s):  
Gisele Caroline Novakowski ◽  
Norma Segatti Hahn ◽  
Rosemara Fugi
Keyword(s):  
Fish Assemblage ◽  
Food Resource ◽  
Fish Fauna ◽  
Diet Breadth ◽  
Food Resources ◽  
Dry Season ◽  
Trophic Guilds ◽  
Trophic Specialization ◽  
Mato Grosso ◽  
Mean Values

We assessed the trophic structure of the fish fauna in Sinhá Mariana pond, Mato Grosso State, from March 2000 to February 2001. The aim was to determine the feeding patterns of the fish species during the rainy and dry seasons. The diets of 26 species (1,294 stomach contents) were determined by the volumetric method. Insects and fish were the most important food resources: insects were the dominant food of 23% and 27% of the species, respectively, in the rainy and dry season, and fish was the dominant item for 31% of the species in both seasons. Cluster analysis (Euclidean Distance) identified seven trophic guilds in the rainy season (detritivores, herbivores, insectivores, lepidophages, omnivores, piscivores and planktivores), and five trophic guilds in the dry season (detritivores, insectivores, lepidophages, omnivores and piscivores). The smallest mean values of diet breadth were observed for the specialist guilds (detritivores, lepidophages and piscivores), in both seasons. The widest means for diet breadth were observed for the omnivores, regardless of the season. In general, there was no seasonal variation in feeding overlap among the species studied. At the community level, diet overlap values between species were low (< 0.4) for 80% of the pairs in each season, suggesting wide partitioning of the food resource. The fish assemblage showed a tendency toward trophic specialization, regardless of the season, although several species changed their diets. We might consider two non-excludent hypothesis: that there is no pattern on the use of seasonal food resources and/or probably there are several patterns, because each one is based on characteristics of the studied site and the taxonomic composition of the resident species.

scholarly journals Fish assemblage structure of the Ipanema River, a small lotic environment partially protected by a Conservation Unit in southeastern Brazil

2013 ◽  
Vol 73 (2) ◽  
pp. 259-270
Author(s):  
AK Oliveira ◽  
F Apone ◽  
JLO Birindelli ◽  
JC Garavello
Keyword(s):  
River Basin ◽  
Fish Assemblage ◽  
Fish Fauna ◽  
Southeastern Brazil ◽  
Fish Assemblage Structure ◽  
Oxbow Lakes ◽  
Conservation Unit ◽  
Tietê River ◽  
Lotic Environment ◽  
Lotic Environments

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.

scholarly journals Assessment of fish assemblage in an urban system, Itapecerica River, upper São Francisco River basin, Divinópolis, Minas Gerais, Brazil

Check List ◽  
2013 ◽  
Vol 9 (3) ◽  
pp. 482 ◽  
Author(s):  
Fabrício F.T. Domingos ◽  
Ralph G. Thomé ◽  
Rosy I.M.A. Ribeiro ◽  
Helena A.V. Souza ◽  
Hélio B. Santos
Keyword(s):  
Alien Species ◽  
River Basin ◽  
Fish Assemblage ◽  
Fish Fauna ◽  
Urban System ◽  
Migratory Fish ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Ecological Importance ◽  
High Level

Despite the economic and ecological importance of the Itapecerica River, there is no information about the local fish fauna. The aim of the present study was to provide a list of fish species in Itapecerica River, a tributary of the upper São Francisco River basin, inside an urban area. The specimens were collected quarterly from May 2010 to February 2012, using casting nets, trawl net and gillnets. We listed 29 species belonging to 21 genera of 14 families and 4 orders. Characiformes were represented by 16 species, Siluriformes by nine, Gymnotiformes and Perciformes by two each. Three alien species and five migratory fish were recorded. The low number of species found in this study in relation to São Francisco basin, could be reflecting the high level of degradation of waters in the Itapecerica River.

scholarly journals Spatial distribution and habitat use by early fish stages in a dammed river basin, Southern Brazil

2018 ◽  
Vol 66 (2) ◽  
pp. 605
Author(s):  
Diego Azevedo Zoccal Garcia ◽  
Alexandro Derly Augusto Costa ◽  
Fernanda Simões de Almeida ◽  
Andréa Bialetzki ◽  
Mário Luís Orsi
Keyword(s):  
Spatial Distribution ◽  
Life History ◽  
Parental Care ◽  
River Basin ◽  
Fish Species ◽  
Life History Strategy ◽  
Fish Fauna ◽  
Mesh Size ◽  
Life History Strategies ◽  
Eggs And Larvae

Fish diversity loss is threatened by the construction of dams as they prevent the regular natural dispersal among populations. Thus, conservation of key riverine habitats for fish reproduction may be essential for the recruitment of new native species of fish. The present study aimed to identify key habitats for fish spawning and early development in the Paranapanema River basin, as well as to determine the taxonomic composition, reproductive and life-history strategy, and to report spatial distribution of eggs, larvae and juveniles. The importance of lagoons, tributaries, and sub-tributaries was evaluated in the Paranapanema River basin between October 2012 and March 2013. Eggs and larvae samples were collected at dawn and dusk with conical plankton nets (0.5 mm mesh size), whereas juveniles were captured during the day with seine and sieve (0.5 cm mesh size). A total of 547 eggs, 904 larvae and 1 228 juveniles were captured. We observed that 2 larvae and 288 juveniles of non-migratory species, parental care, and equilibrium life-history strategy, predominated in lagoons and tributaries. On the other hand, 13 larvae and 60 juveniles of short migratory distance, no parental care, and periodic life-history strategy predominated in sub-tributaries. The highest densities of eggs were recorded in tributaries and sub-tributaries (Tukey’s test, P = 0.001 and P = 0.03, respectively), and the highest densities of larvae were recorded for lagoons and tributaries (P = 0.005 and P = 0.0001, respectively). Captures of eggs and larvae were higher at night; while the highest catches per unit effort of juveniles were recorded for tributaries and sub-tributaries. Fish species that adopt different life-history strategies can use diverse types of habitats during the early stages. Lagoons, tributaries and sub-tributaries of the Paranapanema River play different roles in the reproductive success of fish fauna in a heavily modified basin. The preservation of spawning and nursery areas trapped between reservoirs is necessary for Neotropical fish species recruitment and survival. Rev. Biol. Trop. 66(2): 605-621. Epub 2018 June 01. 

scholarly journals An inventory of Ichthyofauna of the Pindaré River drainage, Mearim River basin, Northeastern Brazil

2020 ◽  
Vol 20 (4) ◽  
Author(s):  
Erick C. Guimarães ◽  
Pâmella S. de Brito ◽  
Cléverson S. Gonçalves ◽  
Felipe P. Ottoni
Keyword(s):  
Freshwater Fish ◽  
River Basin ◽  
Native Species ◽  
Fish Fauna ◽  
Taxonomic Status ◽  
Northeastern Brazil ◽  
Neotropical Fish ◽  
River Drainage ◽  
Number Of Species ◽  
Species Lists

Abstract: In the present work, we conducted an extensive long-lasting inventory of the fishes, using different collection methodologies, covering almost the entire Pindaré River drainage, one of the principal tributaries of the Mearim River basin, an area included in the Amazônia Legal region, northeastern Brazil. We reported 101 species, just three of them being non-native, demonstrating that the composition of this studied fish community is majority composed of native species. We found a predominance of species of the orders Characiformes and Siluriformes, corroborating the pattern usually found for the Neotropical fish fauna. Similar to other studies, this inventory was mainly dominated by small characids, representing 21% of the species herein recorded. When comparing the present survey with other species lists published for this region (including the States of Maranhão and Piaui), we can conclude that the freshwater fish fauna of the State of Maranhão is probably still underestimated. We reported 41 more species, and one more species than Soares (2005, 2013) and Abreu et al. (2019) recorded for the entire Mearim River basin, respectively. We believe, however, that the number of species presented by Abreu et al. (2019) is overestimated. We compared our results with all other freshwater fish species inventories performed for the hydrological units Maranhão and Parnaíba sensu Hubbert & Renno (2006). With these comparisons, we concluded that our results evidenced that a high effort was put in the inventory here presented. The two works including more species recorded from coastal river basins of the hydrological units Maranhão and Parnaíba were the works published by Ramos et al. (2014) for the Parnaíba River basin, one of the main and larger river basin of Brazil, and the compiled data published by Castro & Dourado (2011) for the Mearim, Pindaré, Pericumã, and upper Turiaçu River drainages, including 146 and 109 species, respectively. Our survey recorded only 45 less species than Ramos et al. (2014), and eight less species than Castro & Dourado (2011). However, it is essential to emphasize that the number of species presented by Castro & Dourado (2011) is probably overestimated since they did not update and check the taxonomic status of the species of their compiled data. In several cases, they considered more than one name for the same species.

scholarly journals Fishes from the Itapecuru River basin, State of Maranhão, northeast Brazil

2011 ◽  
Vol 71 (2) ◽  
pp. 375-380 ◽  
Author(s):  
MC Barros ◽  
EC Fraga ◽  
JLO Birindelli
Keyword(s):  
River Basin ◽  
Fish Species ◽  
Amazon Basin ◽  
Fish Fauna ◽  
Large River ◽  
Northeastern Brazil ◽  
South American ◽  
Northeast Brazil ◽  
Number Of Species ◽  
Brazilian State

The Itapecuru is a relatively large river in the northeastern Brazilian state of Maranhão. During several expeditions to this basin, we collected 69 fish species belonging to 65 genera, 29 families and 10 orders. Characiformes and Siluriformes were the orders with the largest number of species and Characidae, Loricariidae, Cichlidae, Auchenipteridae and Pimelodidae were the richest families. About 30% of the fish fauna of the Itapecuru basin is endemic or restricted to northeastern Brazil. Just over a fifth (22%) of the species is also known to occur in the Amazon basin and only a few are more widely distributed in South American.

scholarly journals Ichthyofauna of the Gurgueia River, Parnaíba River basin, northeastern Brazil

Check List ◽  
2015 ◽  
Vol 11 (5) ◽  
pp. 1765 ◽  
Author(s):  
Márcio Joaquim da Silva ◽  
Brisa Guimarães Costa ◽  
Telton Pedro Anselmo Ramos ◽  
Paulo Auricchio ◽  
Sergio Maia Queiroz Lima
Keyword(s):  
River Basin ◽  
Reference Point ◽  
Native Species ◽  
Fish Fauna ◽  
Northeastern Brazil ◽  
Fish Diversity ◽  
Freshwater Fish Fauna ◽  
The Right ◽  
Brazilian Northeast ◽  
Parnaíba Basin

The Gurgueia River in southern Piauí state, Brazil, is the largest affluent on the right margin of the Parnaíba River basin. This study aimed to inventory the Gurgueia River ichthyofauna, and contribute to the knowledge of fish diversity in Northeastern Brazil. We sampled 71 locations throughout the Gurgueia sub-basin between 2006 and 2014, which resulted in 90 fish species representing 67 genera, 26 families and six orders, including two non-native species. Six species are newly recorded for the Parnaíba basin (Hasemania nana, Hemigrammus brevis, H. guyanensis, H. ora, Corydoras sp. and Cetopsorhamdia sp.), increasing its freshwater ichthyofauna to 152 species. The Gurgueia River contains 59.2% of the ichthyofauna known for the Parnaíba basin, and can be used as a reference point for the establishment of priority areas for the conservation of the freshwater fish fauna of the Brazilian Northeast.

scholarly journals Headwater stream fish fauna from the Upper Paranapanema River basin

2016 ◽  
Vol 16 (3) ◽  
Author(s):  
Mauricio Cetra ◽  
George Mendes Taliaferro Mattox ◽  
Fabio Cop Ferreira ◽  
Rayssa Bernardi Guinato ◽  
Fernando Vieira Silva ◽  
...  
Keyword(s):  
River Basin ◽  
Fish Species ◽  
Fish Communities ◽  
Fish Fauna ◽  
Dry Season ◽  
Headwater Stream ◽  
Paraná River ◽  
Stream Fish ◽  
Parana River ◽  
Paraná River Basin

Abstract The Paraná River basin has about 600 fish species. In the Upper Paraná, 310 fish species were recorded, with 52 species were registered in the streams and headwaters of the Paranapanema River. The aim of this study was to characterize the stream fish communities in the Upper Paranapanema River basin. Samplings were conducted with electrofishing during the dry season in the year of 2014. The collection effort consisted of 30 streams stretches. As a result, 41 species of stream fish were recorded in the Upper Paranapanema River basin, distributed in 26 genera, 11 families and 7 orders. Thirty-nine percent of the species can be considered rare, 41% intermediate and 20% common. We captured approximately eight species by stream stretch and the estimated richness (Schao2) was 40 ± 6 species. Around 40% of the individuals had less than 50 mm in length.

scholarly journals Seasonally Variant Stable Isotope Baseline Characterisation of Malawi’s Shire River Basin to Support Integrated Water Resources Management

Water ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1410 ◽  
Author(s):  
Limbikani C. Banda ◽  
Michael Rivett ◽  
Robert Kalin ◽  
Anold Zavison ◽  
Peaches Phiri ◽  
...  
Keyword(s):  
Water Resources ◽  
Stable Isotope ◽  
River Basin ◽  
Water Resources Management ◽  
Integrated Water Resources Management ◽  
Lake Malawi ◽  
Dry Season ◽  
Diagnostic Tools ◽  
Wet Season ◽  
Resources Management

Integrated Water Resources Management (IWRM) is vital to the future of Malawi and motivates this study’s provision of the first stable isotope baseline characterization of the Shire River Basin (SRB). The SRB drains much of Southern Malawi and receives the sole outflow of Lake Malawi whose catchment extends over much of Central and Northern Malawi (and Tanzania and Mozambique). Stable isotope (283) and hydrochemical (150) samples were collected in 2017–2018 and analysed at Malawi’s recently commissioned National Isotopes Laboratory. Distinct surface water dry-season isotope enrichment and wet-season depletion are shown with minor retention of enriched signatures ascribed to Lake Malawi influences. Isotopic signatures corroborate that wet-season river flows mostly arise from local precipitation, with dry-season flows supported by increased groundwater contributions. Groundwater signatures follow a local meteoric water line of limited spread suggesting recharge by local precipitation predominantly during the peak months of the wet-season. Relatively few dry-season groundwater samples displayed evaporative enrichment, although isotopic seasonality was more pronounced in the lowlands compared to uplands ascribed to amplified climatic effects. These signatures serve as isotopic diagnostic tools that valuably informed a basin conceptual model build and, going forward, may inform key identified Malawian IWRM concerns. The isotopic baseline establishes a benchmark against which future influences from land use, climate change and water mixing often inherent to IWRM schemes may be forensically assessed. It thereby enables both source-water protection and achievement of Sustainable Development Goal 6.

scholarly journals Ichthyofauna of the Mamanguape river basin, Northeastern, Brazil

2018 ◽  
Vol 18 (3) ◽  
Author(s):  
Leonardo Oliveira-Silva ◽  
Telton Pedro Anselmo Ramos ◽  
Yuri Gomes Ponce Carvalho-Rocha ◽  
Katherine Morais Porto Viana ◽  
Raizze da Costa Avellar ◽  
...  
Keyword(s):  
River Basin ◽  
Poecilia Reticulata ◽  
Fish Fauna ◽  
Arid Area ◽  
Northeastern Brazil ◽  
Main River ◽  
Astyanax Fasciatus ◽  
The Family ◽  
Dominance Pattern ◽  
Semi Arid

Abstract: The Mamanguape River Basin is located in a peripheral semi-arid area of South America, with its headwaters and middle reaches running through the Caatinga (from wetter to drier) and its lower reaches through the Atlantic Forest. The objective of this study was to inventory the fish fauna of the Mamanguape river basin through a comprehensive sampling and to discuss its ichthyofaunal dominance pattern. Sampling was conducted between 2015 and 2016 at 38 points throughout. The main river course was sampled at 18 fixed points during two expeditions (dry and wet seasons) using traw nets, cast nets, and dip nets, with a standardized effort. The tributaries were sampled during the dry season at 20 points using an adaptaptation of the AquaRAP methodology. A total of 32 freshwater fish species belonging to 26 genera, 16 families and six orders were recorded, predominantly from the order Characiformes and the family Characidae. Astyanax fasciatus had widest distribution and greatest abundance in the basin. Siluriformes were the second most prevalent order, with five species recorded. Cichla cf. monoculus, Poecilia reticulata and Oreochromis niloticus were non-native records for the basin. Apareiodon davisi, an Endangered species, was recorded.

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