Data/hora: 16/06/2024 18:55:52

Provedor de dados: | 104
País: | Brazil
Título: | Alimentação de Oligosarcus longirostris Menezes &amp;amp; Gèry (Osteichthyes, acestrorhynchinae) do Reservatório de Salto Segredo, Paraná, Brasil
Autores: | Gealh,Ana Maria; Hahn,Norma Segatti.
Data: | 1998-12-01
Ano: | 1998
Palavras-chave: | Oligosarcus longirostris; Diet; Piscivorous; Salto Segredo Reservoir.
Resumo: | In the feeding study of O. longirostris Menezes &amp;amp; Gèry, 1983, 211 stomachs from fish caught between March 1993 and February 1994 were analysed. Diet composition was analysed by the index of relative importance which deals with the numerical and gravimetric occurrence frequency. Results indicated that the species is piscivorous and its preferential food consisted oíAslyanax sp. 2. It was also found that Astyanax sp. 3 became an important food item, depending on the site of capture and its availability. Availability of prey seems to have a strong influence on the diet of O. longirostris. This same tendency has been observed during the different seasons of the year. Ontogenetic changes have also been found in the basic diet.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Português
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000400017
Editor: | Sociedade Brasileira de Zoologia
Relação: | 10.1590/S0101-81751998000400017
Formato: | text/html
Fonte: | Revista Brasileira de Zoologia  v.15 n.4 1998
Fonte: | info:eu-repo/semantics/openAccess