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Estimating population features of the anomuran crab Petrolisthes armatus (Porcellanidae) in a remaining and impacted mangrove area of the western Atlantic

2009; Taylor & Francis; Volume: 43; Issue: 33-34 Linguagem: Inglês

10.1080/00222930903094613

ISSN

1464-5262

Autores

Ivana Miranda, Fernando Luís Medina Mantelatto,

Tópico(s)

Coral and Marine Ecosystems Studies

Resumo

Abstract This study evaluated biological aspects of Petrolisthes armatus inhabiting a remaining but disturbed mangrove area of Brazil. Samples were taken from March 2005 to July 2006, during low tide in the rocky-shore region. The size frequency distribution for all the individuals collected was bimodal. The sex ratio obtained was not different from 1:1, and the population was classified as standard. A higher reproductive ratio and earlier ovigerous conditions were found in relation to another southern population; these can be hypothesized as adaptations to life in a stressed environment. Even though the population living in Araçá has been subject to an environment frequently disturbed by human-produced pollutants, our results show no sign of negative effects on reproductive stages, recruits or members of the population in general. The population profiles of P. armatus show some peculiarities when compared to other populations inhabiting non disturbed environments. Keywords: BrazilmangrovepollutionpopulationPorcellanidae Acknowledgements This report was part of a Master's thesis by IM, who was supported by a scholarship from CAPES. FLM is grateful to CNPq for research support. IM and FM are grateful to Álvaro da Silva Costa and all the colleagues of the Laboratory of Bioecology and Crustacean Systematics for their help with sampling. Special thanks are due to Andrea L. Meireles for her assistance with suggestions and to Janet Reid for revision on English. The support of the Postgraduate Program in Comparative Biology of FFCLRP/USP and the Centro de Biologia Marinha (CEBIMar/USP) during field work, and of the IBAMA for sampling permission in Brazil (Proc. 02027.002161/2005-88) is gratefully acknowledged. We would also like to thank the anonymous reviewers for their suggestions and contributions toward the improvement of this paper. All experiments conducted in this study comply with current applicable state and federal laws.

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