Biología poblacional y dimorfismo sexual en la gamba de agua dulce Atya scabra (Decapoda: Atyidae) en el río de Contas, Bahía, Brasil.
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| Formato: | Online |
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Universidad de Costa Rica
2020
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| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/38596 |
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RBT385962023-11-09T18:20:57Z Population biology and sexual dimorphism in the freshwater prawn Atya scabra (Decapoda: Atyidae) in the De Contas River, Bahia, Brazil Biología poblacional y dimorfismo sexual en la gamba de agua dulce Atya scabra (Decapoda: Atyidae) en el río de Contas, Bahía, Brasil. de Barros, Matheus Souza Ferreira Calado, Tereza Cristina dos Santos dos Santos, Ewerton Vieira Silva, Alberis Santos Albuquerque, Letícia Gomes de Andrade ecology freshwater conservation morphometry limnology ecología morfometría conservación limnología agua dulce Abstract. Introduction: Crustaceans have economic and ecological importance and the role of caridean crustaceans in lentic environments is crucial to maintain the trophic structure. The species Atya scabra is occasionally associated with fisheries, especially in Northeast and Northern Brazil. Objective: To determine the population structure, reproductive period, patterns of growth and distribution of size classes among sexes in a population of the prawn A. scabra in the De Contas River, Bahia, Brazil. Methods: Individuals were sampled in a period of one year by passing sieves through marginal vegetation and using dragnets. In the laboratory, we recorded the sex of the individuals and measured them using a pachymeter with 0.001 mm precision. The dimensions measured were CL (carapace length), TL (total length) and CW (carapace width). In order to analyze data, linear models for the relationships CL × CW were constructed and the type of allometry for each sex was determined. Individuals were grouped into size classes of 5 mm intervals. A chi-square test (χ2) was used to test deviation from the 1:1 sex ratio. The proportion of ovigerous females was registered for each month to determine the breeding period. Results: A total of 517 individuals were collected, 328 were males and 186 females of which 169 were ovigerous. Males showed a polymodal distribution in size classes and were significantly larger than females, which presented a unimodal distribution in size classes. The observed growth patterns demonstrated that both sexes present negative allometry. However, sexual dimorphism was detected when comparing the growth parameters. Ovigerous females were sampled the entire year and size-frequency data demonstrated that recruitment also occurs throughout the year, which allowed us to classify their reproduction as continuous. Conclusions: Our data is essential to draw sustainable fishery management strategies. We suggest a minimum capture size of 70 mm and capture restrictions from May to August. Key words: ecology; freshwater; limnology; conservation; morphometry. Universidad de Costa Rica 2020-09-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article application/pdf text/html https://revistas.ucr.ac.cr/index.php/rbt/article/view/38596 10.15517/rbt.v68i3.38596 Revista de Biología Tropical; Vol. 68 No. 3 (2020): Revista de Biología Tropical (Int. J. Trop. Biol.): Continuous publication, July - September 2020; 743–751 Revista de Biología Tropical; Vol. 68 Núm. 3 (2020): Revista de Biología Tropical (Int. J. Trop. Biol.): Publicación continua, Julio - Setiembre 2020; 743–751 Revista Biología Tropical; Vol. 68 N.º 3 (2020): Revista de Biología Tropical (Int. J. Trop. Biol.): Continuous publication, July - September 2020; 743–751 2215-2075 0034-7744 10.15517/rbt.v68i3 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/38596/42286 https://revistas.ucr.ac.cr/index.php/rbt/article/view/38596/42287 Copyright (c) 2020 Matheus Souza Ferreira de Barros, Tereza Cristina dos Santos Calado, Ewerton Vieira dos Santos, Alberis Santos Silva, Letícia Gomes de Andrade Albuquerque http://creativecommons.org/licenses/by/4.0 |
| institution |
Universidad de Costa Rica |
| collection |
Revista de Biología Tropical |
| language |
eng |
| format |
Online |
| author |
de Barros, Matheus Souza Ferreira Calado, Tereza Cristina dos Santos dos Santos, Ewerton Vieira Silva, Alberis Santos Albuquerque, Letícia Gomes de Andrade |
| spellingShingle |
de Barros, Matheus Souza Ferreira Calado, Tereza Cristina dos Santos dos Santos, Ewerton Vieira Silva, Alberis Santos Albuquerque, Letícia Gomes de Andrade Biología poblacional y dimorfismo sexual en la gamba de agua dulce Atya scabra (Decapoda: Atyidae) en el río de Contas, Bahía, Brasil. |
| author_facet |
de Barros, Matheus Souza Ferreira Calado, Tereza Cristina dos Santos dos Santos, Ewerton Vieira Silva, Alberis Santos Albuquerque, Letícia Gomes de Andrade |
| author_sort |
de Barros, Matheus Souza Ferreira |
| title |
Biología poblacional y dimorfismo sexual en la gamba de agua dulce Atya scabra (Decapoda: Atyidae) en el río de Contas, Bahía, Brasil. |
| title_short |
Biología poblacional y dimorfismo sexual en la gamba de agua dulce Atya scabra (Decapoda: Atyidae) en el río de Contas, Bahía, Brasil. |
| title_full |
Biología poblacional y dimorfismo sexual en la gamba de agua dulce Atya scabra (Decapoda: Atyidae) en el río de Contas, Bahía, Brasil. |
| title_fullStr |
Biología poblacional y dimorfismo sexual en la gamba de agua dulce Atya scabra (Decapoda: Atyidae) en el río de Contas, Bahía, Brasil. |
| title_full_unstemmed |
Biología poblacional y dimorfismo sexual en la gamba de agua dulce Atya scabra (Decapoda: Atyidae) en el río de Contas, Bahía, Brasil. |
| title_sort |
biología poblacional y dimorfismo sexual en la gamba de agua dulce atya scabra (decapoda: atyidae) en el río de contas, bahía, brasil. |
| title_alt |
Population biology and sexual dimorphism in the freshwater prawn Atya scabra (Decapoda: Atyidae) in the De Contas River, Bahia, Brazil |
| publisher |
Universidad de Costa Rica |
| publishDate |
2020 |
| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/38596 |
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