Data/hora: 17/06/2024 20:56:02

Provedor de dados: | 57
País: | Brazil
Título: | Dental development and ontogenetic diet shifts of Roeboides paranensis Pignalberi (Osteichthyes, Characinae) in pools of the Upper Rio Paraná floodplain (State of Paraná, Brazil)
Autores: | HAHN,N. S.; PAVANELLI,C. S.; OKADA,E. K.
Data: | 2000-02-01
Ano: | 2000
Palavras-chave: | Roeboides paranensis; Dental development; Diet shifts; Rio Paraná.
Resumo: | Species of the characid genus Roeboides are known for their habit of tearing off and ingesting scales from other fishes. Specimens of Roeboides paranensis were taken monthly from March 1992 through February 1993 in five pools of the upper Rio Paraná floodplain and in one site in the Rio Paraná itself, with the aim of relating the dental development to ontogenetic diet shifts. Between 15-22 mm SL, fish had teeth with hypertrophied bases (mammiform) that moved to the outside of the mouth in both maxillas. During ontogeny, the diet shifted, with the smallest individuals eating more microcrustaceans and the larger ones eating more scales. Lepidophagy is non-obligatory, because the ingestion of insects and other invertebrates occurred at all sizes. Spatial variation in diet was large, however diet similarity was great for Roeboides from three floodplain pools that had similar proportions of the main diet categories.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000100012
Editor: | Instituto Internacional de Ecologia
Relação: | 10.1590/S0034-71082000000100012
Formato: | text/html
Fonte: | Revista Brasileira de Biologia  v.60 n.1 2000
Fonte: | info:eu-repo/semantics/openAccess