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

Medina Mantelatto, Fernando Luis; Fransozo, Adilson; Negreiros-Fransozo, María Lucía

dc.creator	Medina Mantelatto, Fernando Luis
dc.creator	Fransozo, Adilson
dc.creator	Negreiros-Fransozo, María Lucía
dc.date	2015-12-10
dc.date.accessioned	2016-05-03T15:28:22Z
dc.date.available	2016-05-03T15:28:22Z
dc.identifier	http://revistas.ucr.ac.cr/index.php/rbt/article/view/22437
dc.identifier.uri	https://hdl.handle.net/10669/26408
dc.description	The 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.description	The 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.format	application/pdf
dc.language	eng
dc.publisher	Universidad de Costa Rica	en-US
dc.rights	Copyright (c) 2015 International Journal of Tropical Biology and Conservation	en-US
dc.source	Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 43 (1-3)April - December 1995; 265-270	en-US
dc.source	Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 43 (1-3)April - December 1995; 265-270	es-ES
dc.source	Revista Biología Tropical; Vol. 43 (1-3)April - December 1995; 265-270	pt-PT
dc.source	2215-2075
dc.source	0034-7744
dc.subject	brachyura	en-US
dc.subject	distribution	en-US
dc.subject	population dynamics	en-US
dc.subject	seasonality	en-US
dc.subject	size frequency	en-US
dc.title	Population structure of Hepatus pudibundus (Decapoda: Calappidae) in Fortaleza Bay, Brazil	en-US
dc.title	Population structure of Hepatus pudibundus (Decapoda: Calappidae) in Fortaleza Bay, Brazil	es-ES
dc.type	artículo original

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