Efeito da densidade populacional sobre as curvas de crescimento de Macrobrachium rosenbergii (De Man) em cultivo semi-intensivo (Crustacea, Palaemonidae)
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Data
1993-01-01
Autores
Valenti, Wagner Cotroni [UNESP]
Mello, Jeanette de Toledo Cardoso de
Castagnolli, Newton [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Zoologia
Resumo
In this article the length growth curves of Macrobrachium rosenbergii (De Man, 1879) held in different population densities were analysed. Postlarvae prawns were stocked into five 0,02 ha earthen ponds at densities of 4, 8, 12, 16 and 20 ind./m² during six months. Forthnightly, the mean total length of animals from each pond were obtained by means of random samples. For each population the length growth curves and the instantaneous growth rate expressions were determined. The growth rate and the asymptotic maximum length decreased with the stocking density raised. This effect is greater when the density ranges in low levels. The growth decrease can be due to intraspecific competition for life resources and to negative interactions between individuals, as aggressive or social behavior, that increase with the increase prawns density.
Descrição
Palavras-chave
Crustacea, Palaemonidae, Macrobrachium rosenbergii, ecology
Como citar
Revista Brasileira de Zoologia. Sociedade Brasileira de Zoologia, v. 10, n. 3, p. 427-438, 1993.