Population biology and relative growth of the crab Minuca mordax (Smith, 1870) (Crustacea, Decapoda, Ocypodidae) in the Igaraçu River, Parnaíba, state of Piauí, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Biotemas (Online) |
Texto Completo: | https://periodicos.ufsc.br/index.php/biotemas/article/view/2175-7925.2020.e67620 |
Resumo: | This study aimed to investigate the population biology of Minuca mordax in the Igaraçu River, Parnaíba, analyzing frequency distribution in size classes, reproductive period, relative growth, morphological sexual maturity, sex ratio and heterochely. The crabs were manually collected, randomly, by two people for 1 hour, in the representative months of the dry season (September to November) and rainy (April to June). In laboratory the crabs were identified, separated according to sex and measured. A total of 610 samples were captured, with 453 males and 157 females. The average size of carapace width (CW) was significantly different (p < 0.05) between males (17.21 ± 3.68 mm) and females (15.06 ± 3.18 mm). The distribution of the crabs in size classes was unimodal for both sexes. The morphological sexual maturity obtained for males was 12.42 mm CW and females was 10.05 mm CW. The sex ratio for the population was 1:0.35 (male: female), with significant difference from the expected ratio of 1:1. The heterochely was observed only in males of the species (224 right-handed and 229 sinister). Subsequently, other on-site observations were carried out monthly, from February/2011 to January/2012 to observe ovigerous females and determine the reproductive period. Females with eggs were observed only from March to June, corresponding to the rainy season in the region. The results found in the present study are similar to those observed in other populations of violinist crabs and suggest that the population is stable in the environment. The present study provides subsidies for the conservation of the species in the Igaraçu River. |
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Population biology and relative growth of the crab Minuca mordax (Smith, 1870) (Crustacea, Decapoda, Ocypodidae) in the Igaraçu River, Parnaíba, state of Piauí, BrazilBiologia populacional do caranguejo Minuca mordax (Smith, 1870) (Crustacea, Decapoda, Ocypodidae) no rio Igaraçu, Parnaíba, PI, BrasilThis study aimed to investigate the population biology of Minuca mordax in the Igaraçu River, Parnaíba, analyzing frequency distribution in size classes, reproductive period, relative growth, morphological sexual maturity, sex ratio and heterochely. The crabs were manually collected, randomly, by two people for 1 hour, in the representative months of the dry season (September to November) and rainy (April to June). In laboratory the crabs were identified, separated according to sex and measured. A total of 610 samples were captured, with 453 males and 157 females. The average size of carapace width (CW) was significantly different (p < 0.05) between males (17.21 ± 3.68 mm) and females (15.06 ± 3.18 mm). The distribution of the crabs in size classes was unimodal for both sexes. The morphological sexual maturity obtained for males was 12.42 mm CW and females was 10.05 mm CW. The sex ratio for the population was 1:0.35 (male: female), with significant difference from the expected ratio of 1:1. The heterochely was observed only in males of the species (224 right-handed and 229 sinister). Subsequently, other on-site observations were carried out monthly, from February/2011 to January/2012 to observe ovigerous females and determine the reproductive period. Females with eggs were observed only from March to June, corresponding to the rainy season in the region. The results found in the present study are similar to those observed in other populations of violinist crabs and suggest that the population is stable in the environment. The present study provides subsidies for the conservation of the species in the Igaraçu River.O presente estudo teve como objetivo investigar a biologia populacional de Minuca mordax no Rio Igaraçu, Parnaíba, PI, analisando a distribuição de frequência em classes de tamanho, período reprodutivo, crescimento relativo, maturidade sexual morfológica, razão sexual e heteroquelia. Os animais foram coletados manualmente de forma aleatória por duas pessoas durante 1 hora, nos meses representativos da estação seca (setembro a novembro) e chuvosa (abril a junho). Em laboratório os caranguejos foram identificados, separados quanto ao sexo e mensurados. Um total de 610 exemplares foi capturado, sendo 453 machos e 157 fêmeas. O tamanho médio da largura de carapaça (LC) diferiu significativamente (p<0,05) entre machos (17,21 ± 3,68 mm) e fêmeas (15,06 ± 3,18 mm). A distribuição dos caranguejos em classes de tamanho foi unimodal para ambos os sexos. A maturidade sexual morfológica obtida para os machos foi de 12,42 mm de LC e para as fêmeas foi de 10,05 mm de LC. A razão sexual para a população foi de 1:0,35 (macho:fêmea), sendo verificada diferença significativa da proporção esperada de 1:1. A heteroquelia foi verificada apenas nos machos da espécie (224 destros e 229 sinistros). Posteriormente, outras observações in loco foram realizadas mensalmente, de fevereiro/2011 a janeiro/2012 para observação de fêmeas ovígeras e determinação do período reprodutivo. Fêmeas com ovos foram observadas apenas nos meses de março a junho, correspondendo ao período chuvoso da região. Os resultados encontrados no presente estudo são semelhantes aos observados em outras populações de caranguejos violinistas e sugerem que a população se encontra estável no ambiente. O presente estudo fornece subsídios para a conservação da espécie no manguezal do Rio Igaraçu.Universidade Federal de Santa Catarina2020-05-25info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsc.br/index.php/biotemas/article/view/2175-7925.2020.e6762010.5007/2175-7925.2020.e67620Biotemas; v. 33 n. 2 (2020); 1-122175-79250103-1643reponame:Biotemas (Online)instname:Universidade Federal de Santa Catarina (UFSC)instacron:UFSCenghttps://periodicos.ufsc.br/index.php/biotemas/article/view/2175-7925.2020.e67620/43380Copyright (c) 2020 Sidely Gil Alves Vieira-Santos, Luiz Gonzaga Alves dos Santos-Filho, Lissandra Corrêa Fernandes-Goés, João Marcos de Góesinfo:eu-repo/semantics/openAccessSantos, Sidely Gil Alves Vieira dosSantos Filho, Luiz Gonzaga Alves dosFernandes-Goés, Lissandra CorrêaGóes, João Marcos de2020-05-25T16:46:14Zoai:periodicos.ufsc.br:article/67620Revistahttp://www.biotemas.ufsc.br/index.htmPUBhttps://periodicos.ufsc.br/index.php/biotemas/oai||carlospinto@ccb.ufsc.br2175-79250103-1643opendoar:2020-05-25T16:46:14Biotemas (Online) - Universidade Federal de Santa Catarina (UFSC)false |
dc.title.none.fl_str_mv |
Population biology and relative growth of the crab Minuca mordax (Smith, 1870) (Crustacea, Decapoda, Ocypodidae) in the Igaraçu River, Parnaíba, state of Piauí, Brazil Biologia populacional do caranguejo Minuca mordax (Smith, 1870) (Crustacea, Decapoda, Ocypodidae) no rio Igaraçu, Parnaíba, PI, Brasil |
title |
Population biology and relative growth of the crab Minuca mordax (Smith, 1870) (Crustacea, Decapoda, Ocypodidae) in the Igaraçu River, Parnaíba, state of Piauí, Brazil |
spellingShingle |
Population biology and relative growth of the crab Minuca mordax (Smith, 1870) (Crustacea, Decapoda, Ocypodidae) in the Igaraçu River, Parnaíba, state of Piauí, Brazil Santos, Sidely Gil Alves Vieira dos |
title_short |
Population biology and relative growth of the crab Minuca mordax (Smith, 1870) (Crustacea, Decapoda, Ocypodidae) in the Igaraçu River, Parnaíba, state of Piauí, Brazil |
title_full |
Population biology and relative growth of the crab Minuca mordax (Smith, 1870) (Crustacea, Decapoda, Ocypodidae) in the Igaraçu River, Parnaíba, state of Piauí, Brazil |
title_fullStr |
Population biology and relative growth of the crab Minuca mordax (Smith, 1870) (Crustacea, Decapoda, Ocypodidae) in the Igaraçu River, Parnaíba, state of Piauí, Brazil |
title_full_unstemmed |
Population biology and relative growth of the crab Minuca mordax (Smith, 1870) (Crustacea, Decapoda, Ocypodidae) in the Igaraçu River, Parnaíba, state of Piauí, Brazil |
title_sort |
Population biology and relative growth of the crab Minuca mordax (Smith, 1870) (Crustacea, Decapoda, Ocypodidae) in the Igaraçu River, Parnaíba, state of Piauí, Brazil |
author |
Santos, Sidely Gil Alves Vieira dos |
author_facet |
Santos, Sidely Gil Alves Vieira dos Santos Filho, Luiz Gonzaga Alves dos Fernandes-Goés, Lissandra Corrêa Góes, João Marcos de |
author_role |
author |
author2 |
Santos Filho, Luiz Gonzaga Alves dos Fernandes-Goés, Lissandra Corrêa Góes, João Marcos de |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Santos, Sidely Gil Alves Vieira dos Santos Filho, Luiz Gonzaga Alves dos Fernandes-Goés, Lissandra Corrêa Góes, João Marcos de |
description |
This study aimed to investigate the population biology of Minuca mordax in the Igaraçu River, Parnaíba, analyzing frequency distribution in size classes, reproductive period, relative growth, morphological sexual maturity, sex ratio and heterochely. The crabs were manually collected, randomly, by two people for 1 hour, in the representative months of the dry season (September to November) and rainy (April to June). In laboratory the crabs were identified, separated according to sex and measured. A total of 610 samples were captured, with 453 males and 157 females. The average size of carapace width (CW) was significantly different (p < 0.05) between males (17.21 ± 3.68 mm) and females (15.06 ± 3.18 mm). The distribution of the crabs in size classes was unimodal for both sexes. The morphological sexual maturity obtained for males was 12.42 mm CW and females was 10.05 mm CW. The sex ratio for the population was 1:0.35 (male: female), with significant difference from the expected ratio of 1:1. The heterochely was observed only in males of the species (224 right-handed and 229 sinister). Subsequently, other on-site observations were carried out monthly, from February/2011 to January/2012 to observe ovigerous females and determine the reproductive period. Females with eggs were observed only from March to June, corresponding to the rainy season in the region. The results found in the present study are similar to those observed in other populations of violinist crabs and suggest that the population is stable in the environment. The present study provides subsidies for the conservation of the species in the Igaraçu River. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-05-25 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufsc.br/index.php/biotemas/article/view/2175-7925.2020.e67620 10.5007/2175-7925.2020.e67620 |
url |
https://periodicos.ufsc.br/index.php/biotemas/article/view/2175-7925.2020.e67620 |
identifier_str_mv |
10.5007/2175-7925.2020.e67620 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://periodicos.ufsc.br/index.php/biotemas/article/view/2175-7925.2020.e67620/43380 |
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 |
Universidade Federal de Santa Catarina |
publisher.none.fl_str_mv |
Universidade Federal de Santa Catarina |
dc.source.none.fl_str_mv |
Biotemas; v. 33 n. 2 (2020); 1-12 2175-7925 0103-1643 reponame:Biotemas (Online) instname:Universidade Federal de Santa Catarina (UFSC) instacron:UFSC |
instname_str |
Universidade Federal de Santa Catarina (UFSC) |
instacron_str |
UFSC |
institution |
UFSC |
reponame_str |
Biotemas (Online) |
collection |
Biotemas (Online) |
repository.name.fl_str_mv |
Biotemas (Online) - Universidade Federal de Santa Catarina (UFSC) |
repository.mail.fl_str_mv |
||carlospinto@ccb.ufsc.br |
_version_ |
1799940554504536064 |