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Dinâmica populacional de Aegla platensis Schmitt (Crustácea, Decapoda, Aeglidae)

2000; Sociedade Brasileira de Zoologia; Volume: 17; Issue: 1 Linguagem: Inglês

10.1590/s0101-81752000000100005

ISSN

1806-969X

Autores

Alessandra Angélica de Pádua Bueno, Georgina Bond‐Buckup,

Tópico(s)

Fish Biology and Ecology Studies

Resumo

Population's dynamics of Aeg/a p/atensis Schmitt (Crustacea, Decapoda, Aeglidae).The crustaceans of the genus Aeg/a Leach, 1820, are found in streams, rivers of caves, current rivers and lagoons, from Franca, São Paulo, Brazil (20 0 60'S, 47°40'W), to Ilha Madre de Dios (50°01 ' IO"S, 75°18'45"W), Chile in South America.The crabs (Aeg/a p/atensis Schmitt, 1942) were monthly sampled by hand fromjuly 1997 to september 1998 in Arroio do Mineiro, Taquara (29°46'S, 50 0 53'W), Rio Grande do Sul, Brazil.The sex, lhe length and width of lhe carapace were registered.After being collected lhe animaIs were returned to the stream.The reproductive period, the size at the first maturation and lhe sex-ratio were identified.The reproductive period of A. p/atensis lasts lhe whole year.The percentage of ovigerous females is higher in july.The size at the first maturation is from 14,40 to 15,60 mm of carapace lenglh.The sex-ratio is 1,08 male to 1 female.The annual population 's density is 12 animais per square meter.

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