Resumo
Hoplosternum Uttorale (Hancock, 1828) is an abundant species in the lagoons of the upper Paraná river floodplain. This species was sampled in Patos and Guaraná lagoons in the flood period (November/92-May/93) and low water period (June-October/93). To analyse food contents in the diet were analysed stomach of 91 adults. Twenty seven food items were recorded, among them, Testaceae, Nematoda, microcrustaceans, quironomids and organic detritus were predominant. These items allows to characterize the species as bentivore. To study feeding activity were analized 565 adults stomach contents. Food intake was more intense during flooding. Considering diel variation, the species started to eat during dusk, increasing during night, stopping to eat during daytime.
Siluriformes; Callichthyidae; Hoplosternum Uttorale; feeding; diel cycle; lagoons
Siluriformes; Callichthyidae; Hoplosternum Uttorale; feeding; diel cycle; lagoons
Alimentação e ciclo alimentar diário de Hoplosternum littorale (Hancock) (Siluriformes, Callichthyidae) nas lagoas Guaraná e Patos da planície do alto rio Paraná, Brasil
Feeding and diel cycle of feeding of Hoplosternum uttorale (Hancock) (Siluriformes, Callichthyidae) in the lagoons Guaraná and Patos of the upper Paraná river, Brazil
Norma Segatti HahnI,II; Vera Lúcia Lescano de AlmeidaI,III; Karla Danielle Gaspar da LuzIV
IDepartamento de Biologia, Nupélia, Universidade Estadual de Maringá. Avenida Colombo 5790, 87020-900 Maringá, Paraná, Brasil
IIPesquisador do CNPq
IIICurso de Pós-graduação em Ambientes Aquáticos Continentais
IVBolsista de Iniciação Científica RHAE/CNPq
ABSTRACT
Hoplosternum Uttorale (Hancock, 1828) is an abundant species in the lagoons of the upper Paraná river floodplain. This species was sampled in Patos and Guaraná lagoons in the flood period (November/92-May/93) and low water period (June-October/93). To analyse food contents in the diet were analysed stomach of 91 adults. Twenty seven food items were recorded, among them, Testaceae, Nematoda, microcrustaceans, quironomids and organic detritus were predominant. These items allows to characterize the species as bentivore. To study feeding activity were analized 565 adults stomach contents. Food intake was more intense during flooding. Considering diel variation, the species started to eat during dusk, increasing during night, stopping to eat during daytime.
Key words: Siluriformes, Callichthyidae, Hoplosternum Uttorale, feeding, diel cycle, lagoons
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AGRADECIMENTOS. Agradecemos ao CIAMB/PADCT pelo apoio financeiro e ao NUPELIA (Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura) pelo apoio logístico.
Recebido em 16.VIII.1996; aceito em 13.II.1997.
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Datas de Publicação
-
Publicação nesta coleção
13 Jul 2009 -
Data do Fascículo
1997
Histórico
-
Recebido
16 Ago 1996 -
Aceito
13 Fev 1997
