Early life stages of fish and the relationships with zooplankton in a tropical Brazilian reservoir: Lake Monte Alegre
Braz. j. biol
; 62(1): 41-50, Feb. 2002. ilus, tab, graf
Article
em En
| LILACS
| ID: lil-321285
Biblioteca responsável:
BR1.1
RESUMO
For evaluating the trophic relationship between early life stages of fish and zooplankton in Lake Monte Alegre, fish distribution and feeding habits have been studied in areas with and without macrophytes. In the first of these areas, 356 specimens belonging to 8 species, mostly juveniles, were caught by a sieve. Another 35 specimens, belonging to 4 species, were caught by gill nets and seine in areas lacking macrophytes. Their diets were composed of aquatic insects, microcrustaceans, rotifers, detritus, and other aquatic invertebrates. Microcrustacean prey were mainly littoral or benthic dwellers, found in the highest proportion in specimens of 7-20 mm SL. Most fish species have parental care, which could explain the absence of planktonic larvae. Early life stages of fish do not exert a predation pressure on the lake zooplankton
Texto completo:
1
Índice:
LILACS
Assunto principal:
Comportamento Predatório
/
Zooplâncton
/
Peixes
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Braz. j. biol
Assunto da revista:
BIOLOGIA
Ano de publicação:
2002
Tipo de documento:
Article
/
Project document