Método gráfico e estimativa de índice alimentar aplicado no estudo de alimentação de peixes

Kawakami, E.; Vazzoler, G.

doi:10.1590/S0373-55241980000200043

Resumo

Using a figure which is a combination of volume percentage (Vi) in the axis of x and frequency of occurrence percentage (Fi) in the axis of y it is possible to obtain paralelograms representing the relative importance of the food items. The paralelogram areas are proportional to the volume (%) and frequency of occurrence (%) products; such values are used to calculate a "feeding index" (IAi). This "feeding index'' is proposed as a new method to evaluate the true importance of each food item in the feeding spectrum of each species, as well as to contribute to the understanding of the relationships between several species when applied to fish fauna from the same place and at the same time.

ARTIGOS

Método gráfico e estimativa de índice alimentar aplicado no estudo de alimentação de peixes

E. Kawakami^I; G. Vazzoler^II

^ICompanhia de Tecnologia de Saneamento Ambiental - CETESB, S. Paulo, SP, Brasil

^IIInstituto Oceanográfico da Universidade de São Paulo, São Paulo, SP, Brasil

SYNOPSIS

Using a figure which is a combination of volume percentage (Vi) in the axis of x and frequency of occurrence percentage (Fi) in the axis of y it is possible to obtain paralelograms representing the relative importance of the food items. The paralelogram areas are proportional to the volume (%) and frequency of occurrence (%) products; such values are used to calculate a "feeding index" (IAi).

This "feeding index'' is proposed as a new method to evaluate the true importance of each food item in the feeding spectrum of each species, as well as to contribute to the understanding of the relationships between several species when applied to fish fauna from the same place and at the same time.

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Bibliografia

Referências bibliográficas

HYNES, H.B.N. 1950. The food of freshwater sticklebacks (Gasterosteus aculeatus and Pygosteus pungitius), with a review of methods used in studies of the food of fishes. J. Anim. Ecol., 19(1):36-58.
KAWAKAMI, E, 1975. Alimentação de Pleuronectiformes (Análise comparativa e bionomia;. Dissertação de Mestrado Universidade de São Paulo, Instituto Oceanografico.
LANDE, R. 1973. Food and feeding habits of plaice (Pleuronectes platessa L.) in Borgenfjorden, North-Trondelag, Norway. Norw. J. Zool., 21:91-100.
______ 1976. Food and feeding habits of the dab (Limanda limanda (L.) ) in Borgenfjorden, North-Trondelag, Norway. Norw. J. Zool., 24:225-230.

Datas de Publicação

Publicação nesta coleção
06 Jun 2012
Data do Fascículo
1980

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[1] HYNES, H.B.N. 1950. The food of freshwater sticklebacks (Gasterosteus aculeatus and Pygosteus pungitius), with a review of methods used in studies of the food of fishes. J. Anim. Ecol., 19(1):36-58.

[2] KAWAKAMI, E, 1975. Alimentação de Pleuronectiformes (Análise comparativa e bionomia;. Dissertação de Mestrado Universidade de São Paulo, Instituto Oceanografico.

[3] LANDE, R. 1973. Food and feeding habits of plaice (Pleuronectes platessa L.) in Borgenfjorden, North-Trondelag, Norway. Norw. J. Zool., 21:91-100.

[4] ______ 1976. Food and feeding habits of the dab (Limanda limanda (L.) ) in Borgenfjorden, North-Trondelag, Norway. Norw. J. Zool., 24:225-230.