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Population dynamics of the crab Hepatus pudibundus (Herbst, 1785) (Decapoda, Aethridae) on the southern coast of São Paulo state, Brazil

Published online by Cambridge University Press:  05 September 2018

Lizandra Fernandes Miazaki ,
Sabrina Morilhas Simões ,
Antonio Leão Castilho  and
Rogério Caetano Costa
Lizandra Fernandes Miazaki
Affiliation:
Department of Biological Sciences, Laboratory of Biology of Marine and Freshwater Shrimp (LABCAM), Faculty of Sciences, São Paulo State University (UNESP), Av. Eng. Luiz Edmundo Carrijo Coube, 14-01, 17033-360 Bauru, SP, Brazil
Sabrina Morilhas Simões
Affiliation:
Department of Biological Sciences, Laboratory of Biology of Marine and Freshwater Shrimp (LABCAM), Faculty of Sciences, São Paulo State University (UNESP), Av. Eng. Luiz Edmundo Carrijo Coube, 14-01, 17033-360 Bauru, SP, Brazil
Antonio Leão Castilho
Affiliation:
Study Group on Crustacean Biology, Ecology and Culture (NEBECC) – Zoology Department, Bioscience Institute, UNESP, 18618-000, Botucatu, SP, Brazil
Rogério Caetano Costa*
Affiliation:
Department of Biological Sciences, Laboratory of Biology of Marine and Freshwater Shrimp (LABCAM), Faculty of Sciences, São Paulo State University (UNESP), Av. Eng. Luiz Edmundo Carrijo Coube, 14-01, 17033-360 Bauru, SP, Brazil
*
Author for correspondence: Rogério Caetano da Costa, E-mail: [email protected]
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Abstract

The present study investigated the population dynamics of Hepatus pudibundus in the Cananéia region, in southern São Paulo state, Brazil, focusing on population structure, growth parameters, longevity, sex ratio, reproduction and recruitment juvenile period. Sampling was performed monthly at seven stations from July 2012 to June 2014, using a shrimp fishing boat. A total of 1650 specimens were collected: 551 males and 1099 females. The males were larger than females. Reproductive females were captured throughout the study period and juveniles were captured in most months. Both of these demographic categories were positively correlated with temperature. Growth parameters showed differences between sexes: CW∞ = 78.91 mm, k = 0.0066 day−1, t0 = 0.0965 for males and CW∞ = 69.71 mm, k = 0.0053 day−1, t0 = −0.2404 for females. Longevity was estimated at 1.91 and 2.40 years for males and females, respectively. The findings provide a greater understanding of the life cycle in this species. Additionally, since trawl nets are not selective, this study also provides information for better trawl fishery management, addressing not only the target shrimp but also the by-catch species.

Keywords

Brachyuragrowthlongevitypopulation structurereproductive biologysex ratio
Type
Review
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 99 , Issue 4 , June 2019 , pp. 867 - 878
Copyright
Copyright © Marine Biological Association of the United Kingdom 2018 

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