Population structure of the fiddler crab Uca leptodactyla Rathbun 1898 (Brachyura: Ocypodidae) in a tropical mangrove of northeast Brazil

Detalhes bibliográficos
Autor(a) principal: Bezerra, Luis Ernesto Arruda
Data de Publicação: 2006
Outros Autores: Matthews-Cascon, Helena
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
Texto Completo: http://www.repositorio.ufc.br/handle/riufc/60165
Resumo: The population structure of the fiddler crab U. leptodactyla Rathbun, 1898 was investigated during a one-year period in a tropical mangrove forest in Northeast Brazil (3o 43'S, 38o 32'W). The study specifically addressed factors such as absolute density, sex ratio, population structure and handedness. Eight transects were delimited in a mangrove area of Pacoti River. Monthly, two transects were randomly selected and visited. On each transect, ten 0.25 m2 squares were sampled during low tide periods from September 2003 to August 2004. A total of 1042 crabs was captured, of which 522 were male (50.14%) and 520 were female (49.75%). Only 4 ovigerous females were obtained during the study. There was not significant difference between the mean size of males and females. The overall size frequency distribution was unimodal, with the females being most abundant in the largest size classes, while the males in the smallest. The overall sex ratio (1:0.99) did not differ statistically from 1:1 proportion. The ratio between right-handed and lefthanded males was 1:0.95 and did not differ significantly of the 1:1. The observed average density was 17 individuals/m2 , being widely found on open fields. The unimodal distribution, with juvenile being found year-round, suggests a stable population, with breeding taking place throughout the year, although the low number of ovigerous females collected didn't represent the peak of reproductive activity of U. leptodactyla.
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spelling Population structure of the fiddler crab Uca leptodactyla Rathbun 1898 (Brachyura: Ocypodidae) in a tropical mangrove of northeast BrazilPopulation structure of the fiddler crab Uca leptodactyla Rathbun 1898 (Brachyura: Ocypodidae) in a tropical mangrove of northeast BrazilCaranguejoEspéciesDistribuição geograficaThe population structure of the fiddler crab U. leptodactyla Rathbun, 1898 was investigated during a one-year period in a tropical mangrove forest in Northeast Brazil (3o 43'S, 38o 32'W). The study specifically addressed factors such as absolute density, sex ratio, population structure and handedness. Eight transects were delimited in a mangrove area of Pacoti River. Monthly, two transects were randomly selected and visited. On each transect, ten 0.25 m2 squares were sampled during low tide periods from September 2003 to August 2004. A total of 1042 crabs was captured, of which 522 were male (50.14%) and 520 were female (49.75%). Only 4 ovigerous females were obtained during the study. There was not significant difference between the mean size of males and females. The overall size frequency distribution was unimodal, with the females being most abundant in the largest size classes, while the males in the smallest. The overall sex ratio (1:0.99) did not differ statistically from 1:1 proportion. The ratio between right-handed and lefthanded males was 1:0.95 and did not differ significantly of the 1:1. The observed average density was 17 individuals/m2 , being widely found on open fields. The unimodal distribution, with juvenile being found year-round, suggests a stable population, with breeding taking place throughout the year, although the low number of ovigerous females collected didn't represent the peak of reproductive activity of U. leptodactyla.Thalassas2021-08-30T15:41:26Z2021-08-30T15:41:26Z2006info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfBEZERRA, Luís Ernesto Arruda; MATTHEWS-CASCON, Helena. Population structure of the fiddler crab Uca leptodactyla Rathbun 1898 (Brachyura: Ocypodidae) in a tropical mangrove of northeast Brazil. Thalassas, Paris, v. 22, p. 65-74, 2006.2114-0332http://www.repositorio.ufc.br/handle/riufc/60165Bezerra, Luis Ernesto ArrudaMatthews-Cascon, Helenaengreponame:Repositório Institucional da Universidade Federal do Ceará (UFC)instname:Universidade Federal do Ceará (UFC)instacron:UFCinfo:eu-repo/semantics/openAccess2022-12-05T12:41:30Zoai:repositorio.ufc.br:riufc/60165Repositório InstitucionalPUBhttp://www.repositorio.ufc.br/ri-oai/requestbu@ufc.br || repositorio@ufc.bropendoar:2024-09-11T18:43:23.077659Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)false
dc.title.none.fl_str_mv Population structure of the fiddler crab Uca leptodactyla Rathbun 1898 (Brachyura: Ocypodidae) in a tropical mangrove of northeast Brazil
Population structure of the fiddler crab Uca leptodactyla Rathbun 1898 (Brachyura: Ocypodidae) in a tropical mangrove of northeast Brazil
title Population structure of the fiddler crab Uca leptodactyla Rathbun 1898 (Brachyura: Ocypodidae) in a tropical mangrove of northeast Brazil
spellingShingle Population structure of the fiddler crab Uca leptodactyla Rathbun 1898 (Brachyura: Ocypodidae) in a tropical mangrove of northeast Brazil
Bezerra, Luis Ernesto Arruda
Caranguejo
Espécies
Distribuição geografica
title_short Population structure of the fiddler crab Uca leptodactyla Rathbun 1898 (Brachyura: Ocypodidae) in a tropical mangrove of northeast Brazil
title_full Population structure of the fiddler crab Uca leptodactyla Rathbun 1898 (Brachyura: Ocypodidae) in a tropical mangrove of northeast Brazil
title_fullStr Population structure of the fiddler crab Uca leptodactyla Rathbun 1898 (Brachyura: Ocypodidae) in a tropical mangrove of northeast Brazil
title_full_unstemmed Population structure of the fiddler crab Uca leptodactyla Rathbun 1898 (Brachyura: Ocypodidae) in a tropical mangrove of northeast Brazil
title_sort Population structure of the fiddler crab Uca leptodactyla Rathbun 1898 (Brachyura: Ocypodidae) in a tropical mangrove of northeast Brazil
author Bezerra, Luis Ernesto Arruda
author_facet Bezerra, Luis Ernesto Arruda
Matthews-Cascon, Helena
author_role author
author2 Matthews-Cascon, Helena
author2_role author
dc.contributor.author.fl_str_mv Bezerra, Luis Ernesto Arruda
Matthews-Cascon, Helena
dc.subject.por.fl_str_mv Caranguejo
Espécies
Distribuição geografica
topic Caranguejo
Espécies
Distribuição geografica
description The population structure of the fiddler crab U. leptodactyla Rathbun, 1898 was investigated during a one-year period in a tropical mangrove forest in Northeast Brazil (3o 43'S, 38o 32'W). The study specifically addressed factors such as absolute density, sex ratio, population structure and handedness. Eight transects were delimited in a mangrove area of Pacoti River. Monthly, two transects were randomly selected and visited. On each transect, ten 0.25 m2 squares were sampled during low tide periods from September 2003 to August 2004. A total of 1042 crabs was captured, of which 522 were male (50.14%) and 520 were female (49.75%). Only 4 ovigerous females were obtained during the study. There was not significant difference between the mean size of males and females. The overall size frequency distribution was unimodal, with the females being most abundant in the largest size classes, while the males in the smallest. The overall sex ratio (1:0.99) did not differ statistically from 1:1 proportion. The ratio between right-handed and lefthanded males was 1:0.95 and did not differ significantly of the 1:1. The observed average density was 17 individuals/m2 , being widely found on open fields. The unimodal distribution, with juvenile being found year-round, suggests a stable population, with breeding taking place throughout the year, although the low number of ovigerous females collected didn't represent the peak of reproductive activity of U. leptodactyla.
publishDate 2006
dc.date.none.fl_str_mv 2006
2021-08-30T15:41:26Z
2021-08-30T15:41:26Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv BEZERRA, Luís Ernesto Arruda; MATTHEWS-CASCON, Helena. Population structure of the fiddler crab Uca leptodactyla Rathbun 1898 (Brachyura: Ocypodidae) in a tropical mangrove of northeast Brazil. Thalassas, Paris, v. 22, p. 65-74, 2006.
2114-0332
http://www.repositorio.ufc.br/handle/riufc/60165
identifier_str_mv BEZERRA, Luís Ernesto Arruda; MATTHEWS-CASCON, Helena. Population structure of the fiddler crab Uca leptodactyla Rathbun 1898 (Brachyura: Ocypodidae) in a tropical mangrove of northeast Brazil. Thalassas, Paris, v. 22, p. 65-74, 2006.
2114-0332
url http://www.repositorio.ufc.br/handle/riufc/60165
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Thalassas
publisher.none.fl_str_mv Thalassas
dc.source.none.fl_str_mv reponame:Repositório Institucional da Universidade Federal do Ceará (UFC)
instname:Universidade Federal do Ceará (UFC)
instacron:UFC
instname_str Universidade Federal do Ceará (UFC)
instacron_str UFC
institution UFC
reponame_str Repositório Institucional da Universidade Federal do Ceará (UFC)
collection Repositório Institucional da Universidade Federal do Ceará (UFC)
repository.name.fl_str_mv Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)
repository.mail.fl_str_mv bu@ufc.br || repositorio@ufc.br
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