| Registro completo |
| Provedor de dados: |
Zoologia
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| País: |
Brazil
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| Título: |
Dieta do tucunaré-amarelo Cichla monoculus (Bloch & Schneider) (Osteichthyes, Cichlidae), no Reservatório de Lajes, Rio de Janeiro, Brasil
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| Autores: |
Santos,Luciano Neves dos
Gonzalez,Alejandra Filippo
Araújo,Francisco Gerson
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| Data: |
2001-07-01
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| Ano: |
2001
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| Palavras-chave: |
Cichla
Trofic ecology
Diet
Reservoirs
Freshwater fish
Condition factor
Feeding habits
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| Resumo: |
The diet of Cichla monoculus (Bloch & Schneider, 1801) in Lajes's Reservoir, a major impoundment in Rio de Janeiro State, Brazil, was assessed, from fishes collected in 1994,1996 and 1999/2000. Gut contents in individuals was analyzed by the index of relative importance (IRI) which deals with numerical, gravimetrical and frequency of occurrence. Cichla monoculus showed a strong piscivorous habits feeding on Cichlidae, Characidae and Pimelodidae, in decreasing order of importance, with a remarkable cannibalism on young-of-the-year. Others minor items in the diet were Macrobrachium sp. and Odonata. Changes in feeding composition varied with reservoir's zones and seasons, with higher diversity in Autumn and peaks of cannibalism in lower zone during Spring/Summer. Overall, only one third of fish species composition in the reservoir are predated by C. monoculus. Condition factor (k) and fullness index varied closely with higher values in lower zone, and lower records in Winter.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Português
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000500015
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| Editor: |
Sociedade Brasileira de Zoologia
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| Relação: |
10.1590/S0101-81752001000500015
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Zoologia v.18 suppl.1 2001
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| Direitos: |
info:eu-repo/semantics/openAccess
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