Resource partitioning between two species of Bryconamericus Eigenmann, 1907 from the Iguaçu river basin, Brazil - DOI: 10.4025/actascibiolsci.v26i4.1534
Diets of two species of Bryconamericus Eigenmann, 1907 called Bryconamericus sp. 1 and Bryconamericus sp. 2, were compared. Collections were made monthly, from March 1997 to February 1998, on the Iguaçu River, State of Paraná. Both species are insectivores, but Bryconamericus sp. 1 feed predominantl...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2008 |
| País: | Brasil |
| Institución: | Universidade Estadual de Maringá (UEM) |
| Repositorio: | Acta Scientiarum Biological Sciences |
| Idioma: | portugués |
| OAI Identifier: | oai:periodicos.uem.br/ojs:article/1534 |
| Acceso en línea: | http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1534 |
| Access Level: | acceso abierto |
| Palabra clave: | partição de recursos dieta morfologia trófica Bryconamericus neotropical 2.01.00.00-0 Biologia Geral |
| Sumario: | Diets of two species of Bryconamericus Eigenmann, 1907 called Bryconamericus sp. 1 and Bryconamericus sp. 2, were compared. Collections were made monthly, from March 1997 to February 1998, on the Iguaçu River, State of Paraná. Both species are insectivores, but Bryconamericus sp. 1 feed predominantly on larvae of aquatic insects and Bryconamericus sp. 2 feed on terrestrial insects. In Bryconamericus sp. 1, the mouth is sub-inferior with slightly thick upper lip, while in Bryconamericus sp. 2 the mouth is anterior with reduced lip; teeth are different in both species, confirming differences in feeding tactics. The length of the intestine is significantly longer in Bryconamericus sp. 1. This particularity and the low overlap values (< 0.60) suggest that interspecific differences in feeding habits play an important role, allowing species coexistence |
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