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Habitat use in different life and moulting stages of Callinectes sapidus (Decapoda, Portunidae) in South Brazilian estuarine and marine environments

Published online by Cambridge University Press:  17 December 2019

Ileana Ortega Open the ORCID record for Ileana Ortega [Opens in a new window] ,
Christopher Fonseca Ibeiro ,
Lucas Santos Rodrigues Open the ORCID record for Lucas Santos Rodrigues [Opens in a new window] ,
Marcos Alaniz Rodrigues Open the ORCID record for Marcos Alaniz Rodrigues [Opens in a new window]  and
Luiz Felipe Cestari Dumont
Ileana Ortega*
Affiliation:
Laboratório de Crustáceos Decápodes. Universidade Federal de Rio Grande (FURG), Programa de Pós-Graduação em Oceanografia Biológica, Instituto de Oceanografia, Av. Itália, Km 78, Código Postal: 96201- 900Rio Grande, RS, Brasil
Christopher Fonseca Ibeiro
Affiliation:
Laboratório de Crustáceos Decápodes. Universidade Federal de Rio Grande (FURG), Programa de Pós-Graduação em Oceanografia Biológica, Instituto de Oceanografia, Av. Itália, Km 78, Código Postal: 96201- 900Rio Grande, RS, Brasil
Lucas Santos Rodrigues
Affiliation:
Laboratório de Crustáceos Decápodes. Universidade Federal de Rio Grande (FURG), Programa de Pós-Graduação em Oceanografia Biológica, Instituto de Oceanografia, Av. Itália, Km 78, Código Postal: 96201- 900Rio Grande, RS, Brasil
Marcos Alaniz Rodrigues
Affiliation:
Laboratório de Crustáceos Decápodes. Universidade Federal de Rio Grande (FURG), Programa de Pós-Graduação em Oceanografia Biológica, Instituto de Oceanografia, Av. Itália, Km 78, Código Postal: 96201- 900Rio Grande, RS, Brasil
Luiz Felipe Cestari Dumont
Affiliation:
Laboratório de Crustáceos Decápodes. Universidade Federal de Rio Grande (FURG), Programa de Pós-Graduação em Oceanografia Biológica, Instituto de Oceanografia, Av. Itália, Km 78, Código Postal: 96201- 900Rio Grande, RS, Brasil
*
Author for correspondence: Ileana Ortega, E-mail: ileanaortega@gmail.com
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Abstract

The blue crab Callinectes sapidus is an important ecological and commercial species. It plays a fundamental role in the structure and function of coastal benthic food webs, with global catches of ~74,357 tons. This is the most exploited portunid species in Brazil. However, few studies about the ecology and population dynamics of C. sapidus have been published. This study aimed to analyse the preferred areas for the spatial distribution of juveniles and moulting individuals of C. sapidus in shallow areas of the Patos Lagoon estuary and the adjacent marine reproductive area, and their relation to water and sediment characteristics. Juveniles and moulting individuals preferred the embayment of the upper estuary, where the sediments are finer, with higher contents of organic matter and the presence of submerged vegetation. There was also a temporal variability in the abundance of juvenile size classes, with two marked increments of smaller individuals: (1) in late spring and summer and (2) in winter, indicating two recruitment peaks. Unusual environmental conditions in the summer of the first year, with an increase of fine sediments and organic matter, combined with low salinities in the adjacent marine area, allowed recruitment of individuals there. We suggest better attention to the embayment around the Marinheiros Island (considered here as upper estuary) for management and protection measures due to the overlapping of recruitment preferences of the blue crab, pink shrimp and fish species in this area.

Keywords

Blue crabenvironmental variablesestuarymoultprotected zonessize classesvegetated bottom
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 100 , Issue 1 , February 2020 , pp. 79 - 91
Copyright
Copyright © Marine Biological Association of the United Kingdom 2019

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