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Reproductive biology of Neohelice granulata (Decapoda: Varunidae) in two salt marshes of the estuarine region of the Lagoa dos Patos Lagoon, southern Brazil

Published online by Cambridge University Press:  19 September 2008

Roberta A. Barutot ,
Fernando D'Incao  and
Duane B. Fonseca
Roberta A. Barutot*
Affiliation:
Departamento de Oceanografia, Universidade Federal do Rio Grande, Rio Grande, 96201-900, RS, Brazil
Fernando D'Incao
Affiliation:
Departamento de Oceanografia, Universidade Federal do Rio Grande, Rio Grande, 96201-900, RS, Brazil
Duane B. Fonseca
Affiliation:
Departamento de Ciências Fisiológicas, Universidade Federal do Rio Grande, Rio Grande, 96201-900, RS, Brazil
*
Correspondence should be addressed to: Roberta A. Barutot, Departamento de Oceanografia, Universidade Federal do Rio Grande, Rio Grande, 96201-900, RS, Brazil email: [email protected]
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Abstract

Neohelice granulata is a crab found in salt marshes and mangroves of the south and south-eastern Atlantic coast of South America. Reproductive biology was studied by taking samples for two years at two salt marshes—‘Prainha’ and ‘Ilha’—in the estuarine region of Patos Lagoon (southern Brazil). Ovigerous females were found most of the year in both salt marshes with average CW ranging from 18.5 (Prainha) to 22.8 mm (Ilha). A significant linear relationship was found between log(CW) and log(number of eggs). Average size at the onset of maturation was 14.9 and 14 mm at Prainha, for males and females, respectively, while at Ilha it was 18.2 and 16.8 mm, for males and females, respectively. Results provided evidence of significant differences in reproductive traits between populations of the two salt marshes. Differences are likely related to the higher organic matter content found in the sediment from Ilha.

Keywords

reproductive biologyNeohelice granulatasalt marshesLagoa dos Patos Lagoonsouthern Brazil
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 89 , Issue 4 , June 2009 , pp. 769 - 774
Copyright
Copyright © Marine Biological Association of the United Kingdom 2008

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