Population features, sexual dimorphism and handedness of the primary freshwater crab Trichodactylus cf. fluviatilis (Brachyura: Trichodactylidae) from southeastern Brazil
Autor(a) principal: | |
---|---|
Data de Publicação: | 2020 |
Outros Autores: | , |
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. |
id |
UNSP_5bab849119bbdb8f4c847b85737cad16 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/198271 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
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) |
repository.mail.fl_str_mv |
|
_version_ |
1808128660274675712 |