Results 1 to 10 of about 117 (83)

Reproductive aspects of piranhas Serrasalmus spilopleura and Serrasalmus marginatus into the Upper Paraná River, Brazil [PDF]

Brazilian Journal of Biology, 2003
Construction of the Itaipu Dam, 150 km downstream from Sete Quedas Falls, resulted in the drowning of that natural geographic barrier, with consequent invasion of Serrasalmus marginatus in the upper stream. This event was followed by the reduction in the
Agostinho C. S.
exaly   +8 more sources

Ocorrência de dois citotipos em Serrasalmus spilopleura Kner, 1858 (characiformes, serrasalmidae) da região de confluência dos Rios Negro e Solimões, Amazonas, Brasil [PDF]

Acta Amazonica, 2000
Descreve-se pela primeira vez o cariótipo de exemplares de S. spilopleura da Amazônia Central. Todos os indivíduos analisados apresentaram número diplóide igual a 60 cromossomos, em conformidade com os dados da espécie obtidos em indivíduos da bacia do ...
Eliana Feldberg, Jorge Ivan Rebelo Porto, Feldberg Eliana   +2 more
exaly   +6 more sources

Weight-Length Ratio of Piranhas <i>Serrasalmus</i> (Characiformes, Serrasalmidae) in Bolivia: Relationships to Molecular Divergence and Maximum Size? [PDF]

Ecol Evol
This study presents WLRs of nine piranha or palometa fish species of genus Serrasalmus present in the Amazon and La Plata basins of Bolivia and compares differences with genetic divergence (mtDNA COI locus) and the observed maximum size. All species showed an exponential (power type) growth pattern, and all WLRs were significantly different among all ...
Carvajal-Vallejos FM, Gallo-Cardozo F, Careaga M, Campero M.   +3 more
europepmc   +2 more sources

Hydrological Connectivity Enhances Fish Biodiversity in Amazonian Mining Ponds: Insights From eDNA and Traditional Sampling. [PDF]

Mol Ecol
ABSTRACT Artisanal and small‐scale gold mining (ASGM) expansion in the Madre de Dios region of the Peruvian Amazon has transformed primary forests into a novel wetland complex of thousands of abandoned mining ponds. Despite their ecological relevance, post‐mining recovery of these systems remains understudied, particularly regarding fish biodiversity ...
Timana-Mendoza C, Reyes-Calderón A, Venail P, Britzke R, Santa-Maria MC, Araújo-Flores JM, Silman M, Fernandez LE.   +7 more
europepmc   +2 more sources

The introduced Arapaima gigas in the Bolivian Amazon: Trophic position and isotopic niche overlap with native species

Ecology of Freshwater Fish, Volume 32, Issue 4, Page 926-937, October 2023., 2023
Abstract Non‐native fish species may generate major ecological impacts on native assemblages. This study aims to assess the potential impact of the introduced Arapaima gigas on native fish assemblages in two oxbow lakes of the Bolivian Amazon. Stable isotope data were used to determine trophic position (TP) and isotopic niche overlap, to evaluate ...
Danny Rejas, Thierry Oberdorff, Steven A. J. Declerck, Monika Winder   +3 more
wiley   +1 more source

The role of freshwater bioacoustics in ecological research

WIREs Water, Volume 7, Issue 3, May/June 2020., 2020
Fish are the focal study species in the majority of freshwater bioacoustic studies, which often focus on a single species that is recorded in laboratory aquaria. Despite their significant contributions to soundscape composition and ecosystem function, arthropods were poorly represented in the research literature.
Jack A. Greenhalgh, Martin J. Genner, Gareth Jones, Camille Desjonquères   +3 more
wiley   +1 more source

Invasão da piranha Serrasalmus marginatus Valenciennes, 1847 no alto rio Paraná, Brasil (Osteichthyes, Serrasalmidae)

Acta Scientiarum: Biological Sciences, 2008
A construção da barragem de Itaipu, 150 km a jusante do salto de Sete Quedas, resultou no afogamento da barreira geográfica natural, com conseqüente mistura das ictiofaunas.
Carlos Sérgio Agostinho, Horácio Ferreira Júlio Junior   +1 more
doaj   +1 more source

Vanamea GEN. NOV. FOR Livoneca symmetricaVAN NAME,1925, (CRUSTACEA, ISOPODA, CYMOTHOIDAE) AND A REDESCRIPTION OF THE SPECIES BASED ON SPECIMENS FROM BRAZILIAN PIRANHAS [PDF]

Acta Amazonica, 1993
Studies of the cymothoid isopod Livoneca symmetricaVan Name, 1925, showed that this species has characters that preclude its inclusion in LivonecaLeach, 1818, or in any other known genus.
Vernon E. THATCHER
doaj   +1 more source

Fish diversity in the rivers that drain the Baixada Maranhense and the Mearim basin in northeastern Brazil

Brazilian Journal of Biology, 2023
The Baixada Maranhense Environmental Protection Area of the Brazilian state of Maranhão encompasses a biologically rich region that includes the basins of four principal rivers, the Mearim, Pericumã, Pindaré, and Turiaçu, which form a complex of wetlands.
D. Limeira-Filho, P. S. S. Moraes, M. S. Almeida, A. C. C. Silva, J. L. N. Silva, L. Farias-Rodrigues, B. R. S. Teixeira, J. V. X. Anjos, J. L. O. Birindelli, M. C. Barros, E. C. Fraga   +10 more
doaj   +1 more source

Perfil Ictiofaunístico de duas Lagoas no Rio Paraná, Região do Parque Nacional de Ilha Grande - PR

Agro@mbiente On-line, 2010
O Rio Paraná é o décimo maior do mundo em descarga e nele se encontra a região do Parque Nacional de Ilha Grande, que é formada por um conjunto de ilhas, lagoas e várzeas periodicamente alagadas, sendo estas de extrema importância para os peixes ...
Marco A. Aricine, Frederico F. da Silva, Wladimir M. Domingues   +2 more
doaj   +1 more source