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Population structure of Hepatus pudibundus (Decapoda: Calappidae) in Fortaleza Bay, Brazil

dc.creatorMedina Mantelatto, Fernando Luis
dc.creatorFransozo, Adilson
dc.creatorNegreiros-Fransozo, María Lucía
dc.date2015-12-10
dc.date.accessioned2016-05-03T15:28:22Z
dc.date.available2016-05-03T15:28:22Z
dc.identifierhttp://revistas.ucr.ac.cr/index.php/rbt/article/view/22437
dc.identifier.urihttp://hdl.handle.net/10669/26408
dc.descriptionThe population of Hepatus pudibundus crabs in Fortaleza Bay, Ubatuba (Sao PauJo), was studied with emphasis on structural aspects such as sex-ratio, size, and reproductive time, based on the number of ovigerous females and on seasonal distribution. Crabs were sampled monthly from November 1988 to October 1989 using a shrimp fishing boat equipped with two otter-trawJs. A total of 405 specimens (males: 133 adult and 34 immature; females: 175 adult, 19 ovigerous and 44 immature) were sampled. Mean animal size, based on the measurement of carapace width (CW), was 53.27 ± 10.59 mm for males and 46.7 ± 7.86 mm for females. Individual size frequency distribution was bimodaJ and skewed to larger size classes in males, and unimodal and normal in females, with the largest numbers occurring in March (83), May (70) and July (50). Reproduction occurred throughout the year, with a high incidence of ovigerous fernales from January to April 1989. The large number of fernales was probably due to the reproductive strategy of the species. The heterogeneous seasonal distribution was probably related to migration to other areas (open sea, estuaries) because of environmental conditions or particular demands during the developmental phase.en-US
dc.descriptionThe population of Hepatus pudibundus crabs in Fortaleza Bay, Ubatuba (Sao PauJo), was studied with emphasis on structural aspects such as sex-ratio, size, and reproductive time, based on the number of ovigerous females and on seasonal distribution. Crabs were sampled monthly from November 1988 to October 1989 using a shrimp fishing boat equipped with two otter-trawJs. A total of 405 specimens (males: 133 adult and 34 immature; females: 175 adult, 19 ovigerous and 44 immature) were sampled. Mean animal size, based on the measurement of carapace width (CW), was 53.27 ± 10.59 mm for males and 46.7 ± 7.86 mm for females. Individual size frequency distribution was bimodaJ and skewed to larger size classes in males, and unimodal and normal in females, with the largest numbers occurring in March (83), May (70) and July (50). Reproduction occurred throughout the year, with a high incidence of ovigerous fernales from January to April 1989. The large number of fernales was probably due to the reproductive strategy of the species. The heterogeneous seasonal distribution was probably related to migration to other areas (open sea, estuaries) because of environmental conditions or particular demands during the developmental phase.es-ES
dc.formatapplication/pdf
dc.languageeng
dc.publisherUniversidad de Costa Ricaen-US
dc.rightsCopyright (c) 2015 International Journal of Tropical Biology and Conservationen-US
dc.sourceRevista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 43 (1-3)April - December 1995; 265-270en-US
dc.sourceRevista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 43 (1-3)April - December 1995; 265-270es-ES
dc.sourceRevista Biología Tropical; Vol. 43 (1-3)April - December 1995; 265-270pt-PT
dc.source2215-2075
dc.source0034-7744
dc.subjectbrachyuraen-US
dc.subjectdistributionen-US
dc.subjectpopulation dynamicsen-US
dc.subjectseasonalityen-US
dc.subjectsize frequencyen-US
dc.titlePopulation structure of Hepatus pudibundus (Decapoda: Calappidae) in Fortaleza Bay, Brazilen-US
dc.titlePopulation structure of Hepatus pudibundus (Decapoda: Calappidae) in Fortaleza Bay, Braziles-ES
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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