Data/hora: 09/06/2024 02:42:11

Provedor de dados: | 83
País: | Brazil
Título: | Gape size influences seasonal patterns of piscivore diets in three Neotropical rivers
Autores: | Montaña,Carmen G.; Layman,Craig A.; Winemiller,Kirk O.
Data: | 2011-01-01
Ano: | 2011
Palavras-chave: | Floodplain river; Food web; Optimal foraging theory; Predator-prey interaction; Venezuela.
Resumo: | We examined diets of four piscivores, two in the order Perciformes (Cichla temensis and C. orinocensis) and two in the order Characiformes (Boulengerella cuvieri and B. lucius), from the Cinaruco, La Guardia, and Ventuari rivers in Venezuela throughout the wet-dry seasonal cycle. The four piscivores consumed a phylogenetically and morphologically diverse group of fishes, reflecting the overall diversity of fish species in these rivers. At the start of the falling-water period, Cichla consumed large prey, especially the abundant, migratory, fish of the genus Semaprochilodus. As these relatively large prey became depleted during the dry season, Cichla tended to consume smaller prey. For Boulengerella, gape limitation precluded consumption of larger, seasonally abundant, fishes, and so prey sizes were more consistent throughout the seasonal cycle. Our findings show how prey abundance and gape limitations interact to influence seasonal patterns of predator-prey interactions.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000300018
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/S1679-62252011005000028
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.9 n.3 2011
Fonte: | info:eu-repo/semantics/openAccess