| Autor: |
Villares Junior GA; Departamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista –UNESP, Rio Claro, SP, Brazil. villaresjunior@yahoo.com.br, Gomiero LM, Goitein R |
| Jazyk: |
angličtina |
| Zdroj: |
Brazilian journal of biology = Revista brasleira de biologia [Braz J Biol] 2011 Aug; Vol. 71 (3), pp. 763-70. |
| DOI: |
10.1590/s1519-69842011000400023 |
| Abstrakt: |
Four biological aspects of Schizodon nasutus in the low Sorocaba river basin, São Paulo, Brazil were analysed. These were accomplished during the year seasons. The fish diet and the feeding activity were investigated by studying the repletion index, which showed no significant differences between seasons. The food items analysed by frequency of occurrence and dominance showed a predominance of vegetable items in the diet. The reproduction, analysed by using the gonadosomatic index, indicated that the reproductive period occurs during the summer period when temperatures are higher and rainfalls are more intense. The amount of accumulated fat and condition factor varied according to reproduction, especially for females. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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