Data/hora: 07/06/2024 05:35:48

Provedor de dados: | 104
País: | Brazil
Título: | Aspectos reprodutivos de Palaemon pandaliformis (Stimpson) (Crustacea, Decapoda, Palaemonidae) no Rio Sahy, Mangaratiba, Rio de Janeiro, Brasil
Autores: | Lima,Giovana Valverde; Oshiro,Lídia Miyako Yoshii.
Data: | 2002-09-01
Ano: | 2002
Palavras-chave: | Reproduction; Palaemon pandaliformis; Freshwater shrimp; Sahy River; Rio de Janeiro State.
Resumo: | The reproductive aspects of the freshwater shrimp Palaemon pandaliformis (Stimpson, 1871) were studied from March, 1998 to February, 1999. Monthly, samples were collected with sives, on the river edge, under the edging vegetation or in small pools. At the laboratory, shrimps were sexed and measured in their total lenght, from the tip of the rostrum to the of telson with precision callipters. The ovigerous shrimps were separated and counted for fecundity determination. The eggs diameter was measured with calibrated stereomicroscope. A total of 872 were collected among which, 46% female, 29% male and 25% juvenil. The sex ratio was 1:1.57. Ovigerous females were present during all seasons, but the reproductive peak accurred in Spring. The ovigerous female showed total lenght from 23.0 to 39.6 mm. The mean fecundity was 137 eggs per female, with a minimum of 40 eggs and a maximum of 270 eggs. The first sexual maturation probably occur at 23.0 mm total lenght. The mean diameter os the eggs size was 0.51 mm (minor) and 0.73 mm (major).
Tipo: | Info:eu-repo/semantics/article
Idioma: | Português
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000300023
Editor: | Sociedade Brasileira de Zoologia
Relação: | 10.1590/S0101-81752002000300023
Formato: | text/html
Fonte: | Revista Brasileira de Zoologia  v.19 n.3 2002
Fonte: | info:eu-repo/semantics/openAccess