Buscar

 

RI UFLA (Universidade Federal de Lavras) >
DBI - Departamento de Biologia >
DBI - Artigos publicados em periódicos >

Por favor, utilize esse identificador para citar este item ou usar como link: http://repositorio.ufla.br/jspui/handle/1/11562

Título: Reproductive aspects of Hyalella carstica (Amphipoda: Hyalellidae) in a natural environment in southeastern Brazil
Autor(es): Torres, Silvia Helena Soares
Bastos-Pereira, Rafaela
Bueno, Alessandra Angélica de Pádua
Assunto: Pre-copula
Pairing
Ovigerous females
Life history
Publicador: Sociedade Brasileira de Carcinologia
Data de publicação: 2015
Referência: TORRES, S. H. S.; BASTOS-PEREIRA, R.; BUENO, A. A. de P. Reproductive aspects of Hyalella carstica (Amphipoda: Hyalellidae) in a natural environment in southeastern Brazil. Nauplius, Cruz das Almas, v. 23, n. 2, July/Dec. 2015.
Abstract: The reproductive aspects of populations are important determinants of their ability to maintain themselves throughout time. In the case of amphipods from the genus Hyalella Smith, 1874, the reproductive period is easily determined by the presence of ovigerous females and pre-copula pairs in the population. This study evaluated the fecundity, pairing patterns and reproduction period of Hyalella carstica Bastos-Pereira and Bueno, 2012 in a karst environment in the West of Minas Gerais, Brazil. Monthly, from April, 2010 to April, 2011, amphipods were sampled using a hand net with 15 cm diameter and 250 µm mesh size. In the laboratory, animals were sexed and measured, and the ovigerous state of females was evaluated. Couples in pre-copula and ovigerous females were found throughout the year, with the exception of the dry months (September−November). During drought, the stream's superficial water dried out, and only a few refuges for the population remained. Although couples were found in all months with a water flow, a higher number of unpaired males and females was found after the dry season. In all months, ovigerous females were more abundant than non-ovigerous, and the relationship between head length and the number of eggs in the marsupium was positive. Most eggs were in the first developmental stage, although all other stages were found before the dry season. Considering the frequency of pre-copula pairs, as well as ovigerous females, the reproduction in this H. carstica population seems to be continuous throughout the year, without a distinct peak.
URI: http://repositorio.ufla.br/jspui/handle/1/11562
Idioma: en_US
Aparece nas coleções: DBI - Artigos publicados em periódicos

Arquivos neste Item:

Arquivo Descrição TamanhoFormato
ARTIGO_Reproductive aspects of Hyalella carstica (Amphipoda Hyalellidae.pdf759,49 kBAdobe PDFVer/abrir

Este item está licenciado com Licença Creative Commons
Creative Commons

Itens protegidos por copyright, com todos os direitos reservados, Salvo indicação em contrário.


Mostrar estatísticas

 


DSpace Software Copyright © 2002-2007 MIT and Hewlett-Packard - Feedback