Population features, sexual dimorphism and handedness of the primary freshwater crab Trichodactylus cf. fluviatilis (Brachyura: Trichodactylidae) from southeastern Brazil

Detalhes bibliográficos
Autor(a) principal: Pescinelli, Régis Augusto [UNESP]
Data de Publicação: 2020
Outros Autores: Mantelatto, Fernando Luis, Costa, Rogerio Caetano [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1080/07924259.2019.1699176
http://hdl.handle.net/11449/198271
Resumo: Recent molecular analyses characterized the freshwater crab Trichodactylus fluviatilis as a species complex. Considering this new scenario, studies about the population features are fundamental to understanding the biology of species belongs to this complex. We investigated the population from southeastern Brazil identify as Trichodactylus cf. fluviatilis, testing the hypotheses that sex ratio differs from the expected 1:1, and that the species shows sexual dimorphism in size, weaponry and body weight. The reproductive period and handedness were also investigated. Population features were determined based on the size-frequency distribution, gonadal development and sex ratio. Sexual dimorphism was analysed comparing the average size and the allometric coefficient. Handedness was verified according to the proportion of right and left chelipeds. Sex ratio skewed towards males and the reproduction was continuous. The sexual dimorphism in T. cf. fluviatilis was found in structures related to weaponry and reproduction. In weaponry, sexual dimorphism was demonstrated by robust chelipeds and high allometric values in males. In females, a high allometric was recorded to the abdomen, structure directly related to reproduction. The right-handedness was observed to the species. All these results contribute to a better understanding of the species’ life history.
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spelling Population features, sexual dimorphism and handedness of the primary freshwater crab Trichodactylus cf. fluviatilis (Brachyura: Trichodactylidae) from southeastern BrazilAllometric growthbody weightsex ratioweaponryRecent molecular analyses characterized the freshwater crab Trichodactylus fluviatilis as a species complex. Considering this new scenario, studies about the population features are fundamental to understanding the biology of species belongs to this complex. We investigated the population from southeastern Brazil identify as Trichodactylus cf. fluviatilis, testing the hypotheses that sex ratio differs from the expected 1:1, and that the species shows sexual dimorphism in size, weaponry and body weight. The reproductive period and handedness were also investigated. Population features were determined based on the size-frequency distribution, gonadal development and sex ratio. Sexual dimorphism was analysed comparing the average size and the allometric coefficient. Handedness was verified according to the proportion of right and left chelipeds. Sex ratio skewed towards males and the reproduction was continuous. The sexual dimorphism in T. cf. fluviatilis was found in structures related to weaponry and reproduction. In weaponry, sexual dimorphism was demonstrated by robust chelipeds and high allometric values in males. In females, a high allometric was recorded to the abdomen, structure directly related to reproduction. The right-handedness was observed to the species. All these results contribute to a better understanding of the species’ life history.Department of Biological Sciences São Paulo State University (UNESP)Laboratory of Bioecology and Crustacean Systematics (LBSC) Faculty of Philosophy Sciences and Letters at Ribeirão Preto (FFCLRP) University of São Paulo (USP)Department of Biological Sciences São Paulo State University (UNESP)Universidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Pescinelli, Régis Augusto [UNESP]Mantelatto, Fernando LuisCosta, Rogerio Caetano [UNESP]2020-12-12T01:08:14Z2020-12-12T01:08:14Z2020-04-02info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article95-105http://dx.doi.org/10.1080/07924259.2019.1699176Invertebrate Reproduction and Development, v. 64, n. 2, p. 95-105, 2020.0792-4259http://hdl.handle.net/11449/19827110.1080/07924259.2019.16991762-s2.0-85076413877Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengInvertebrate Reproduction and Developmentinfo:eu-repo/semantics/openAccess2021-10-23T10:11:19Zoai:repositorio.unesp.br:11449/198271Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:29:41.051816Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Population features, sexual dimorphism and handedness of the primary freshwater crab Trichodactylus cf. fluviatilis (Brachyura: Trichodactylidae) from southeastern Brazil
title Population features, sexual dimorphism and handedness of the primary freshwater crab Trichodactylus cf. fluviatilis (Brachyura: Trichodactylidae) from southeastern Brazil
spellingShingle Population features, sexual dimorphism and handedness of the primary freshwater crab Trichodactylus cf. fluviatilis (Brachyura: Trichodactylidae) from southeastern Brazil
Pescinelli, Régis Augusto [UNESP]
Allometric growth
body weight
sex ratio
weaponry
title_short Population features, sexual dimorphism and handedness of the primary freshwater crab Trichodactylus cf. fluviatilis (Brachyura: Trichodactylidae) from southeastern Brazil
title_full Population features, sexual dimorphism and handedness of the primary freshwater crab Trichodactylus cf. fluviatilis (Brachyura: Trichodactylidae) from southeastern Brazil
title_fullStr Population features, sexual dimorphism and handedness of the primary freshwater crab Trichodactylus cf. fluviatilis (Brachyura: Trichodactylidae) from southeastern Brazil
title_full_unstemmed Population features, sexual dimorphism and handedness of the primary freshwater crab Trichodactylus cf. fluviatilis (Brachyura: Trichodactylidae) from southeastern Brazil
title_sort Population features, sexual dimorphism and handedness of the primary freshwater crab Trichodactylus cf. fluviatilis (Brachyura: Trichodactylidae) from southeastern Brazil
author Pescinelli, Régis Augusto [UNESP]
author_facet Pescinelli, Régis Augusto [UNESP]
Mantelatto, Fernando Luis
Costa, Rogerio Caetano [UNESP]
author_role author
author2 Mantelatto, Fernando Luis
Costa, Rogerio Caetano [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Universidade de São Paulo (USP)
dc.contributor.author.fl_str_mv Pescinelli, Régis Augusto [UNESP]
Mantelatto, Fernando Luis
Costa, Rogerio Caetano [UNESP]
dc.subject.por.fl_str_mv Allometric growth
body weight
sex ratio
weaponry
topic Allometric growth
body weight
sex ratio
weaponry
description Recent molecular analyses characterized the freshwater crab Trichodactylus fluviatilis as a species complex. Considering this new scenario, studies about the population features are fundamental to understanding the biology of species belongs to this complex. We investigated the population from southeastern Brazil identify as Trichodactylus cf. fluviatilis, testing the hypotheses that sex ratio differs from the expected 1:1, and that the species shows sexual dimorphism in size, weaponry and body weight. The reproductive period and handedness were also investigated. Population features were determined based on the size-frequency distribution, gonadal development and sex ratio. Sexual dimorphism was analysed comparing the average size and the allometric coefficient. Handedness was verified according to the proportion of right and left chelipeds. Sex ratio skewed towards males and the reproduction was continuous. The sexual dimorphism in T. cf. fluviatilis was found in structures related to weaponry and reproduction. In weaponry, sexual dimorphism was demonstrated by robust chelipeds and high allometric values in males. In females, a high allometric was recorded to the abdomen, structure directly related to reproduction. The right-handedness was observed to the species. All these results contribute to a better understanding of the species’ life history.
publishDate 2020
dc.date.none.fl_str_mv 2020-12-12T01:08:14Z
2020-12-12T01:08:14Z
2020-04-02
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 http://dx.doi.org/10.1080/07924259.2019.1699176
Invertebrate Reproduction and Development, v. 64, n. 2, p. 95-105, 2020.
0792-4259
http://hdl.handle.net/11449/198271
10.1080/07924259.2019.1699176
2-s2.0-85076413877
url http://dx.doi.org/10.1080/07924259.2019.1699176
http://hdl.handle.net/11449/198271
identifier_str_mv Invertebrate Reproduction and Development, v. 64, n. 2, p. 95-105, 2020.
0792-4259
10.1080/07924259.2019.1699176
2-s2.0-85076413877
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Invertebrate Reproduction and Development
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 95-105
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
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