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| TORRENTE-VILARA,Gislene; CELLA-RIBEIRO,Ariana; HAUSER,Marília; RÖPKE,Cristhiana; FREITAS,Maria Helena; DORIA,Carolina Rodrigues da Costa; ZUANON,Jansen. |
| ABSTRACT Chalceus guaporensis is an endemic fish to the upper Madeira River whereas C. epakros is widespread in many rivers of the central and lower portions of the Amazon Basin, middle and upper Orinoco River Basin, the Essequibo River in Guyana and in the Nanay River in northern Peru. According to literature, both species do not occur in syntopy. We carried out ichthyological surveys along the Madeira River Basin and its rapids, and data on abundance, diet and habitat use were obtained for both species. Chalceus guaporensis and C. epakros are morphologically similar, occupying floodplain habitats and exploiting similar food resources. The former predominated upstream from the Jirau Fall, whereas the latter had most of its abundance bellow the last fall... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alestidae; Coexistence; Biology; Geographical barrier; Muddy water. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000300239 |
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| Caetano, Dyego Leonardo Ferraz; Rosa, Rafael Rogério; Moraes, Verônica Rodrigues de; Jané, Daniela Ribas; Silva, Alexandre Fernandes Oliveira da. |
| The objective of this study was to evaluate the influence of a dam on the ecological parameters of the fish assemblages of a stream of second order of the upper Paraná River basin, southern Brazil. Samplings of abiotic data and ichthyofauna occurred quarterly between September 2012 and June 2013. Were collected 3,128 individuals in six orders, eight families and 13 species. The Cluster analysis (Jaccard) based on species composition indicated the separation of the sampling units into two groups, demonstrating the dissimilarity between upstream and downstream units. The artificial dam was characterized as a discontinuity factor for diversity patterns and ecological processes related to biota. Thus, this study has indications that the creation of dams can... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ecologia 2.05.02.00-1 conservation unit; Geographical barrier; Influence of anthropogenic factors; Neotropical ichthyofauna; Stream ecology Ecologia. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/31943 |
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| Aguiar,Lucas M.; Ludwig,Gabriela; Svoboda,Walfrido K.; Hilst,Carmen L. S.; Navarro,Italmar T.; Passos,Fernando C.. |
| The region of Porto Rico, on the Upper Paraná River, is a contact zone between the Atlantic Rainforest and the Cerrado, with elements of the Pantanal wetlands. During surveys from September 2003 to September to 2005, we recorded the presence of non-volant mammals on 14 islands and the adjacent riverbanks. Surveys were by foot and by boat, and we also interviewed local people about the mammals of the region. Sightings of three primate species - Cebus nigritus (Goldfuss, 1809) (left margin of the river), C. libidinosus Spix, 1823 (right margin) and Alouatta caraya (Humboldt, 1812) (both margins and 12 islands) - were plotted on a satellite image. Alouatta clamitans Cabrera, 1940 was not recorded. However, interviews indicated that this species has occurred... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Exotic species; Gallery forest; Geographical barrier; Neotropical primates. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000400006 |
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