Stereological analyses of the annual variation of captive bullfrogadult testes (Lithobates catesbeianus, Shaw 1802)
Braz. j. morphol. sci
; 29(3): 182-186, jul.-sept. 2012. tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-665197
Biblioteca responsável:
BR734.1
ABSTRACT
The occurrence of seasonality in bullfrog (Lithobates catesbeianus) spermatogenesis was analyzed by quantifying germ cell populations throughout the year, which were divided into bimesters, from November 2001 to October 2002. Body weight, liver weight, fat body weight and gonadal weight were taken and bimonthly grouped. Using these data, the gonadosomatic, hepatosomatic, and liposomatic indexes were calculated. All animals were kept in the same cement cages in a frog farm, and sampled every month. The cages were underthe influence of climate variables changes, such as photoperiod, temperature, rainfall and relative humidity.Body weight was higher during Spring and Summer, and a significant reduction has occurred between Julyand August. The highest gonadosomatic index values were registered from May to October, coinciding withthe period of gonadal preparation for reproduction. Also, the reproduction of bullfrog is directly related toenvironmental factors, mainly due to Summer and Winter humidity variations.
Texto completo:
Disponível
Coleções:
Bases de dados internacionais
Base de dados:
LILACS
Assunto principal:
Rana catesbeiana
/
Comportamento Sexual Animal
Limite:
Animais
Idioma:
Inglês
Revista:
Braz. j. morphol. sci
Assunto da revista:
Anatomia
Ano de publicação:
2012
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Federal University of Espírito Santo/BR
/
Federal University of Viçosa/BR