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

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 Oc...

Descripción completa

Detalles Bibliográficos
Autores principales:	Medina Mantelatto, Fernando Luis, Fransozo, Adilson, Negreiros-Fransozo, María Lucía
Formato:	Online
Idioma:	eng
Publicado:	Universidad de Costa Rica 1995
Acceso en línea:	https://revistas.ucr.ac.cr/index.php/rbt/article/view/22437

id	RBT22437
record_format	ojs
spelling	RBT224372022-05-20T15:04:31Z Population structure of Hepatus pudibundus (Decapoda: Calappidae) in Fortaleza Bay, Brazil Population structure of Hepatus pudibundus (Decapoda: Calappidae) in Fortaleza Bay, Brazil Medina Mantelatto, Fernando Luis Fransozo, Adilson Negreiros-Fransozo, María Lucía brachyura distribution population dynamics seasonality size frequency 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. 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. Universidad de Costa Rica 1995-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/22437 Revista de Biología Tropical; Vol. 43 No. 1-3 (1995): Volume 43 – Regular number 1-3 – April-December 1995; 265–270 Revista de Biología Tropical; Vol. 43 Núm. 1-3 (1995): Volumen 43 – Número regular – Abril-Diciembre 1995; 265–270 Revista Biología Tropical; Vol. 43 N.º 1-3 (1995): Volume 43 – Regular number 1-3 – April-December 1995; 265–270 2215-2075 0034-7744 10.15517/rbt.v43i1-3 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/22437/22604 Copyright (c) 1995 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0
institution	Universidad de Costa Rica
collection	Revista de Biología Tropical
language	eng
format	Online
author	Medina Mantelatto, Fernando Luis Fransozo, Adilson Negreiros-Fransozo, María Lucía
spellingShingle	Medina Mantelatto, Fernando Luis Fransozo, Adilson Negreiros-Fransozo, María Lucía Population structure of Hepatus pudibundus (Decapoda: Calappidae) in Fortaleza Bay, Brazil
author_facet	Medina Mantelatto, Fernando Luis Fransozo, Adilson Negreiros-Fransozo, María Lucía
author_sort	Medina Mantelatto, Fernando Luis
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.
title	Population structure of Hepatus pudibundus (Decapoda: Calappidae) in Fortaleza Bay, Brazil
title_short	Population structure of Hepatus pudibundus (Decapoda: Calappidae) in Fortaleza Bay, Brazil
title_full	Population structure of Hepatus pudibundus (Decapoda: Calappidae) in Fortaleza Bay, Brazil
title_fullStr	Population structure of Hepatus pudibundus (Decapoda: Calappidae) in Fortaleza Bay, Brazil
title_full_unstemmed	Population structure of Hepatus pudibundus (Decapoda: Calappidae) in Fortaleza Bay, Brazil
title_sort	population structure of hepatus pudibundus (decapoda: calappidae) in fortaleza bay, brazil
title_alt	Population structure of Hepatus pudibundus (Decapoda: Calappidae) in Fortaleza Bay, Brazil
publisher	Universidad de Costa Rica
publishDate	1995
url	https://revistas.ucr.ac.cr/index.php/rbt/article/view/22437
work_keys_str_mv	AT medinamantelattofernandoluis populationstructureofhepatuspudibundusdecapodacalappidaeinfortalezabaybrazil AT fransozoadilson populationstructureofhepatuspudibundusdecapodacalappidaeinfortalezabaybrazil AT negreirosfransozomarialucia populationstructureofhepatuspudibundusdecapodacalappidaeinfortalezabaybrazil
_version_	1810114872420073472

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

Ejemplares similares