scholarly journals Fish fauna from the Langueyú basin, Argentina: a prairie stream in a heavily modified landscape

Check List ◽  
2018 ◽  
Vol 14 (2) ◽  
pp. 461-470 ◽  
Author(s):  
Andrea Bertora ◽  
Fabián Grosman ◽  
Pablo Sanzano ◽  
Juan J. Rosso
Keyword(s):  
River Basin ◽  
Fish Species ◽  
Surface Waters ◽  
Fish Fauna ◽  
Land Uses ◽  
Pampa Plain ◽  
Salado River ◽  
Prairie Stream ◽  
Representative Family

On the Pampa plain, one of the most productive modified areas of Argentina, important changes in land uses have drastically altered the landscape during the last decades. This has led to an increased deterioration of surface waters affecting fish that inhabit them. We provide a list of fish species inhabiting an unsurveyed prairie stream of this region. Environmental variables were measured and fish samplings were conducted in 3 sites of the Langueyú stream. A total of 15 species belonging to 10 families and 6 orders were collected. Characiformes and Siluriformes were the richest orders. Characidae was the most representative family. Species richness was highest when compared with other similar regional environments without connection with the Salado river basin. Most of the fish species collected are typical of the region but others are species which typically do not progress beyond the Salado river basin. The role of human intervention in fish species distribution is discussed.

scholarly journals Patterns in fish species composition and assemblage structure in the upper Salado River lakes, Pampa Plain, Argentina

2010 ◽  
Vol 8 (1) ◽  
pp. 135-144 ◽  
Author(s):  
Juan José Rosso ◽  
Rolando Quirós
Keyword(s):  
Species Composition ◽  
Fish Species ◽  
Fish Assemblages ◽  
Human Impacts ◽  
Fish Fauna ◽  
Conservation Strategies ◽  
Water Conductivity ◽  
Relative Contribution ◽  
Pampa Plain ◽  
Salado River

The Pampa Plain, in the central region of Argentina, is mostly drained by the Salado River. The fish fauna of this river is mostly known from field collections in lower reach lakes. Consequently, we aimed to explore the composition and structure of the fish assemblages in the upper Salado River lakes. Patterns in dominance and persistence of species and assemblage level attributes were correlated with environmental and human activity-derived (NO3:NH4) variables. Overall, 19,913 individuals of 17 species included in 5 orders and 11 families were collected. Several species are first records for the upper Salado River lakes. There was a marked proliferation of species in the family Characidae. Conversely, the remainder 10 families were only represented by one or two species. The species composition along the study lakes changed slightly but their relative contribution to the total fish collected (dominance) varied greatly. Rather few species were present in all collections suggesting an important interannual variability in assemblage stability. The gradient in water conductivity was an important factor for the persistence of particular species in the lakes. The gradients in water conductivity and NO3:NH4 ratio were associated with particular fish communities dominated by different groups of species. These results suggest that even when broad management and conservation strategies should encompass the system as a whole, lake-specific approaches must also be addressed. Overall, our results highlight that human impacts on surface waters may interact with environmental factors to influence the dynamics of fish species and the structure of their communities.

scholarly journals Ichthyofauna of streams from the lower Iguaçu River basin, Paraná State, Brazil

2016 ◽  
Vol 16 (3) ◽  
Author(s):  
Crislei Larentis ◽  
Rosilene Luciana Delariva ◽  
Louise Cristina Gomes ◽  
Dirceu Baumgartner ◽  
Igor Paiva Ramos ◽  
...  
Keyword(s):  
River Basin ◽  
Fish Fauna ◽  
Main Channel ◽  
Indicator Species Analysis ◽  
Irreversible Loss ◽  
Species Analysis ◽  
Geomorphological Processes ◽  
Nmds Analysis ◽  
Iguaçu River

Abstract The drainages of the Iguaçu River basin, as well as the main channel of the river, have peculiar characteristics resulting from geomorphological processes in this area, including the formation of the Iguaçu River Falls. This slope in the lower portion of the basin is a biogeographical barrier to many organisms. In this study was inventoried the fish fauna of streams of the lower Iguaçu River basin, evaluating possible differences in the species composition upstream and downstream of this biogeographical barrier. Sampling were conducted between 2004 and 2013, in five streams, three upstream and two downstream of the Iguaçu River Falls, using electrofishing. The nMDS analysis was run to investigate possible groupings of similar fauna between the streams sampled. The scores of this test were tested as to the significance of groupings with the Hotelling T2 test. The indicator value method (IndVal) was used to detect the distribution of species among the groups of the streams upstream and downstream of the Iguaçu River Falls. We collected 18,908 individuals of six orders, 11 families, and 40 species. Siluriformes and Characiformes had the highest species richness; Cyprinodontiformes presented the highest abundance. Considering the species recorded, 21 are considered natives to the Iguaçu River basin, including 15 endemic, wich were found only in streams upstream of the falls. Additional 18 species were verified only in the streams downstream of such barrier. Four species were common to both stretches. The axis 1 of the nMDS separated two groups: streams upstream (S1, S2 and S3) and streams downstream of the Iguaçu River Falls (S4 and S5). The indicator species analysis also indicated a distinction between the groups of streams, that were significantly different (Hotelling's T2 = 234.36, p ˂ 0.0001). The number of endemic species in the streams upstream of the Falls (15 spp.) evidences a significant effect of isolation promoted by the Iguaçu River Falls, and confirms the role of this barrier in the vicariant processes and endemism typical of this basin. These results emphasize the importance of conserving these ecosystems, once the extinction of species in this region means the irreversible loss of them.

scholarly journals Fishes of the Taquari-Antas river basin (Patos Lagoon basin), southern Brazil

2013 ◽  
Vol 73 (1) ◽  
pp. 79-90 ◽  
Author(s):  
FG. Becker ◽  
Fries LCC. De ◽  
J. Ferrer ◽  
VA. Bertaco ◽  
KDG. Luz-Agostinho ◽  
...  
Keyword(s):  
River Basin ◽  
Fish Species ◽  
Native Species ◽  
Fish Fauna ◽  
Secondary Data ◽  
Southern Brazil ◽  
Long Distance ◽  
Patos Lagoon ◽  
Prochilodus Lineatus ◽  
Taxonomic Description

The aquatic habitats of the Taquari-Antas river basin (in the Patos Lagoon basin, southern Brazil) are under marked environmental transformation because of river damming for hydropower production. In order to provide an information baseline on the fish fauna of the Taquari-Antas basin, we provide a comprehensive survey of fish species based on primary and secondary data. We found 5,299 valid records of fish species in the basin, representing 119 species and 519 sampling sites. There are 13 non-native species, six of which are native to other Neotropical river basins. About 24% of the total native species are still lacking a taxonomic description at the species level. Three native long-distance migratory species were recorded (Leporinus obtusidens, Prochilodus lineatus, Salminus brasiliensis), as well as two potential mid-distance migrators (Parapimelodus nigribarbis and Pimelodus pintado). Although there is only one officially endangered species in the basin (S. brasiliensis), restricted range species (21.7% of total species) should be considered in conservation efforts.

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 Fish fauna from Sapucaí-Mirim River, tributary of Grande River, upper Paraná River basin, Southeastern Brazil

2016 ◽  
Vol 16 (1) ◽  
Author(s):  
Alexandre Kannebley de Oliveira ◽  
Julio Cesar Garavello ◽  
Vinicius Vendramini Cesario ◽  
Rodrigo Torres Cardoso
Keyword(s):  
River Basin ◽  
Fish Species ◽  
Fish Fauna ◽  
River Basins ◽  
Paraná River ◽  
Southeastern Brazil ◽  
Fish Diversity ◽  
Parana River ◽  
Upper Paraná River ◽  
Upper Paraná River Basin

The fish species composition of Sapucaí-Mirim River is herein reported and discussed in the faunistic context of Grande and Paranaíba river basins, both formers of the Paraná River. The Sapucaí-Mirim is an important tributary of this hydrographic system, flowing to the left bank of Grande River in a region occupied by the reservoir of the Porto Colombia hydroelectric power plant, at São Paulo state northeastern region, in southeastern Brazil. The poorly known fish diversity of the Sapucaí-Mirim River is presented on basis of sampling efforts conducted in the main river channel and three creeks located at the mid and lower sections of the basin, allowing comparisons of the fish fauna of these two sections in the light of available information of fish inhabiting Grande and Paranaíba river basins. The study of the fish composition resulted in the recognition of 68 species in the Sapucaí-Mirim River, belonging to 23 families distributed in seven orders, all commonly found in upper Paraná River basin: Characiformes (32 spp.), Siluriformes (25 spp.), Labriformes (4 spp.), Gymnotiformes (3 spp.), Cyprinodontiformes (2 spp.), Perciformes (one species) and Synbranchiformes (one species). Most of the species are representative of the native ichthyofauna, but the total diversity also includes allochthonous species, which were chiefly found in the lower stretch studied. Some species found in the Sapucaí-Mirim River require great areas for their maintenance, as do large-sized species, known to have migratory reproductive habits. Also, the diversity of small and medium-sized species found and their distinct morphological and biological attributes, allied to the occurrence of endangered fish species, indicate that the Sapucaí-Mirim River basin is an important place for fish diversity maintenance in the Grande River hydrographic system.

scholarly journals Fish fauna in forested and rural streams from an ecoregion of high endemism, lower Iguaçu River basin, Brazil

2018 ◽  
Vol 18 (3) ◽  
Author(s):  
Rosilene Luciana Delariva ◽  
Mayara Pereira Neves ◽  
Crislei Larentis ◽  
Bruna Caroline Kotz Kliemann ◽  
Mara Cristina Baldasso ◽  
...  
Keyword(s):  
Species Richness ◽  
River Basin ◽  
Rural Areas ◽  
Native Species ◽  
Fish Fauna ◽  
Land Uses ◽  
Conservation Units ◽  
Forested Areas ◽  
Total Species ◽  
Iguaçu River

Abstract The fish fauna of eight streams with different land uses of their watersheds (forested and rural areas) in the lower Iguaçu River basin was inventoried, in order to evaluate the composition and species richness. The fishes were sampled quarterly from May 2015 to February 2016, using the electrofishing technique. In total, 4,239 individuals were captured, belonging to six orders, 11 families and 26 species. The orders Siluriformes and Characiformes, and the families Characidae and Trichomycteridae were the most specious. Of the total species sampled, 65% were endemic to the Iguaçu River basin, four are not described and four are non-native. As expected to the Iguaçu River basin, the inventoried fauna revealed low richness and high endemism, however was highly nested within the species composition reported for main channel of Iguaçu River and their larger tributaries. The species recorded here corresponded to a subset of 24.5% of the 106 species documented for the basin. The streams presented different faunas, with only two species (Astyanax bifasciatus and Trichomycterus stawiarski) common to both forested and rural streams. In addition, higher species richness was recorded in streams inserted in conservation units. The presence of non-native species was more frequent in rural streams. These results highlight the importance of the preservation of forested areas in the watersheds of lower Iguaçu, which presents a peculiar fish fauna, along with several threats to biodiversity such as habitat loss by intensive agriculture use.

scholarly journals Threats to salmon and endangered fish species in Tysa river basin within trans Carpathian region (review)

2019 ◽  
Vol 21 (91) ◽  
pp. 37-48
Author(s):  
V. P. Terpay
Keyword(s):  
Endangered Species ◽  
Environmental Factors ◽  
River Basin ◽  
Fish Species ◽  
Fish Fauna ◽  
Rate Of Change ◽  
Individual Species ◽  
Endangered Fish ◽  
Carpathian Region ◽  
Toxicological Studies

Establish ways of creating, thoroughly investigate the threats and their level of salmon and endangered fish species Tysa River Basin within Zakarpattia region. Rate of change, diversity, distribution, the proportion of individual species, to the distribution of geographic elements on the principle of zoning and depending on environmental conditions. The study of threats to salmon and endangered species of fish in the river Tysa carried tributaries and in areas watercourse Transcarpathian region using generalized results of hydrological, ichthyological and toxicological studies. Number of species status of populations, evaluated on the basis of documents, monitoring of rivers, ichthyological data during in 2008–2014 years of control catching specialists Department of the use, reproduction of water bio-resources and regulation of fisheries in the Transcarpathian region, the State Administration of Environmental Protection in Zakarpattya region, published and unpublished sources, a survey of local fishermen. Collection and processing of materials performed by conventional methods. Comparison of species composition of fish fauna of the Tysa River Basin within Zakarpattia region on the results of previous studies and the current state of evidence that it has changed significantly. Analysis of data for 1926–2015 years revealed the presence of 77 species, which is 41.5 percent more than the same period in 1926. However, should point to the increase in the number and activities of various threats to salmon and other valuable fish species in our region. Established prolonged human pressure, pollution reduced the number of new European grayling and Trout v 13.4 times. There were 16 species, including salmon, listed in the Red Book of Ukraine. Ceased to meet sturgeon passage. Study threats operation populations of salmon and endangered species gives reason to believe that the level of destruction of natural resources, environmental pollution, depletion of the gene pool is too narrow to study hydro. For the first time a comprehensive assessment of threats to salmon, valuable and endangered local fish Transcarpathia in terms of various specific human impact of their pressure from environmental factors in the past and now. A study of the action of environmental factors and implementation of scientifically based measures to restore fish in close to natural. The results can be used in developing preservation methods, quantitative growth of populations of salmon and endangered species not only in Zakarpattya but also in the Carpathian region, water protection planning activities.

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 Human Impact Upon the Distribution of Fish Species in Mures River Basin

1970 ◽  
Vol 66 (2) ◽  
Author(s):  
Catalin V. GRAMA ◽  
Ioan BUD
Keyword(s):  
Human Impact ◽  
River Basin ◽  
Human Activity ◽  
Fish Species ◽  
Fish Fauna ◽  
Physical Parameters ◽  
Ecological State ◽  
The Status ◽  
Distribution Of Fish

The aim of the present study is to asses changes in freshwater ecosistems and fish species compositon, due to human activity, and to cope with this impact, to draw up conteract measurments, according to the particular situations for each site. We have considered to identify artificial and natural polluting sources, which may alter the equlibrium state of the ecosistems, and may cause changes in biodiversity. In order to track these changes we have studied the structure of the fish fauna, chemical and physical parameters of the water, hydromorphological structure of the rivers, which may provide a synthetic overall view upon the status of the waterbodies. These results make up the base of rehabilitation measurment to be taken in order to protect those sites, which still present a good ecological state.

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