scholarly journals Evaluation of the effects of pressure gradients on four Brazilian freshwater fish species

2009 ◽  
Vol 52 (1) ◽  
pp. 111-118 ◽  
Author(s):  
Paulo dos Santos Pompeu ◽  
Luiz Felipe Mascarenhas Horta ◽  
Carlos Barreira Martinez
Keyword(s):  
Freshwater Fish ◽  
River Basin ◽  
Fish Species ◽  
Gradual Increase ◽  
Mortality Rates ◽  
Pressure Gradients ◽  
Freshwater Fish Species ◽  
Sao Francisco River ◽  
São Francisco River

This work aimed to experimentally evaluate the behavior of Brazilian freshwater fish species when submitted to a gradual increase in pressure, as well as sudden decompression's effects simulating the passage through a hydroelectric turbine. Four species from the São Francisco river basin were tested: Astyanax bimaculatus, Hypostomus sp., Leporinus reinhardti and Prochilodus costatus. For all of them mortality rates due to decompression were extremely low. However, the symptoms related to decompression, such as bulged eyes and hemorrhage, were not observed only in Hypostomus sp., and were more frequent the larger the pressure values were, considering the values from which decompression was performed. All these symptoms decreased significantly after 24 h of observation. With the increase in pressure inside the apparatus, the four tested species moved towards the upper levels. This behavior could make possoble the implementation of bypass downstream fish passages in dams constructed in Brazil.

scholarly journals Continental ichthyofauna from the Paraíba do Norte River basin pre-transposition of the São Francisco River, Northeastern Brazil

2018 ◽  
Vol 18 (4) ◽  
Author(s):  
Telton Pedro Anselmo Ramos ◽  
Jéssica Alcoforado de Sena Lima ◽  
Silvia Yasmin Lustosa Costa ◽  
Márcio Joaquim da Silva ◽  
Raizze da Costa Avellar ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
River Basin ◽  
Fish Species ◽  
Scientific Data ◽  
Northeastern Brazil ◽  
Fish Diversity ◽  
Freshwater Fish Species ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Number Of Publications

Abstract: Freshwater ichthyofauna from Brazil Northeast region was considered as being poorly known until recent years, with a considerable number of publications becoming available in the last decade. The present study provides an inventory of freshwater fish species from the Paraíba do Norte River basin located in Paraíba State, Brazil. This inventory is intended to contribute to the of knowledge to the regional fish diversity, pre-transposition of the São Francisco River. Collecting data was obtained from ichthyological databases of both national and foreign institutions. A total of 47 freshwater fish species are registered within the Paraíba do Norte River basin, represented by 38 genera, 20 families and six orders. Characiformes, comprising 47% (22 species), Cichliformes, and Siluriformes are among the most representative orders, 19% (9 species) each, of total recorded species. Seven species of Cichliformes are reported as introduced species in this basin. Cyprinodontiformes and Gobiiformes also registered in this region and correspond to 5% (two species) and Gymnotiformes, Perciformes and Synbranchiformes, 2% (one species each) of total recorded species. Paraíba do Norte River basin stands out in the current national scenario as it comprises the first region from the Mid-Northeastern Caatinga freshwater ecoregion to receive water from the transposition of the São Francisco River. The current inventory is important as it provides scientific data related to the ichthyofauna of Paraíba do Norte River basin prior to the commencement of the river transposition process. An identification key is also given for the freshwater fish species of the region.

scholarly journals Comparative cytogenetics between three Characidae fish species from the São Francisco River basin

Caryologia ◽  
2007 ◽  
Vol 60 (1-2) ◽  
pp. 64-68 ◽  
Author(s):  
Peres Wellington Adriano Moreira ◽  
Luiz Antônio Carlos Bertollo ◽  
Orlando Moreira-Filho
Keyword(s):  
River Basin ◽  
Fish Species ◽  
Comparative Cytogenetics ◽  
Sao Francisco River ◽  
São Francisco River

A review of the freshwater fishes of the Kimberley region of Western Australia

Zootaxa ◽  
2011 ◽  
Vol 2816 (1) ◽  
pp. 1 ◽  
Author(s):  
DAVID L. MORGAN ◽  
GERALD R. ALLEN ◽  
BRADLEY J. PUSEY ◽  
DAMIEN W. BURROWS
Keyword(s):  
Freshwater Fish ◽  
River Basin ◽  
Fish Species ◽  
Western Australia ◽  
Single Species ◽  
Freshwater Fishes ◽  
Gambusia Holbrooki ◽  
Freshwater Fish Species ◽  
Introduced Fishes ◽  
Eastern Mosquitofish

This paper provides an overview of the freshwater fishes of the remote and sparsely populated Kimberley region of Western Australia, an area that has been subject to minimal scientific surveys, most of which have occurred in the last 30 years. A total of 49 freshwater fish species are reported from the region, but this number will likely grow as a result of future discoveries. It is an endemic hotspot, with ~40% of the species found nowhere else; many of which are known from only a few localities. The fauna is dominated by members of the Terapontidae (10 species) and Eleotridae (10 species), followed by the Plotosidae (five species), Melanotaeniidae (five species), Atherinidae (four species) and Ambassidae (four species). Additionally, in terms of freshwater fishes of the Kimberley, there are two species each in the Toxotidae and Ariidae, and a single species from each of the Anguillidae, Clupeidae, Hemiramphidae, Belonidae, Apogonidae, Gobiidae and Soleidae. There are currently no introduced fishes found in any major catchments of the Kimberley, however, there are records of the Eastern Mosquitofish (Gambusia holbrooki) from Cape Leveque (Morgan et al. 2004c) and the Redclaw Crayfish (Cherax quadquicarinatus), which have recently been found within the Ord River basin (Doupé et al. 2004).

scholarly journals New records of freshwater fish for Uruguay

Check List ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 191 ◽  
Author(s):  
Matías Zarucki ◽  
Iván González-Bergonzoni ◽  
Franco Teixeira-de-Mello ◽  
Alejandro Duarte ◽  
Sebastián Serra ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
River Basin ◽  
Fish Species ◽  
Current Distribution ◽  
New Records ◽  
Paraná River ◽  
First Report ◽  
Freshwater Fish Species ◽  
Parana River ◽  
Uruguay River

Based on National Collections records, this article presents the first report of eight freshwater fish species for Uruguay in the middle and lower Uruguay River basin, extending their current distribution: Cyanocharax alegretensis Malabarba and Weitzman, 2003; Leporinus lacustris Amaral Campos, 1945; Microglanis aff. eurystoma Malabarba and Mahler, 1998; Tatia boemia Koch and Reis, 1996; Lepthoplosternum pectorale (Boulenger, 1895); Crenicichla missioneira Lucena and Kullander, 1992; C. minuano Lucena and Kullander, 1992; Apistogramma borellii Regan, 1906. These species were previously recorded either for upper Uruguay River or Paraná River.

scholarly journals Seasonal study of concentration of heavy metals in waters from lower São Francisco River basin, Brazil

2016 ◽  
Vol 76 (4) ◽  
pp. 967-974 ◽  
Author(s):  
A. M. Souza ◽  
A. M. Salviano ◽  
J. F. B. Melo ◽  
W. P. Felix ◽  
C. S. Belém ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Trace Elements ◽  
River Basin ◽  
Environmental Changes ◽  
Gradual Increase ◽  
The Other ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Awareness Programs ◽  
Hydrographic Network

Abstract In this study we determined the concentration of metals (Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn) in the water lower São Francisco River basin, to evaluate the influence of urbanization and industrialization on environmental changes in the water resource. All samples were analyzed using the IUPAC adapted method and processed in an atomic absorption spectrophotometer. The sampling stations located near the industrial areas were influenced by industrialization because they presented higher concentrations of Cd, Cr, Ni and Cu. The other sampled locations showed changes with regard the trace elements probably originating in the soil, like Fe, Zn and Pb. There was a gradual increase in the concentrations of metals, in general, in the period of highest rainfall of the hydrographic network. Overall, except for Zn and Mn, the trace elements exceeded the maximum allowed value established by national legislation (CONAMA). Lower São Francisco River basin has suffered interference from urbanization and industrialization, so awareness programs should be developed so as to control and lessen future problems.

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