Data/hora: 10/06/2024 09:56:27

Provedor de dados: 	57	
País: 	Brazil	
Título: 	Changes in the thyroid gland during the reproductive cycle of the male vespertilionid bat, Scotophilus heathi	
Autores: 	KRISHNA,A.; SINGH,K.	
Data: 	1998-11-01	
Ano: 	1998	
Palavras-chave: 	Thyroid; Thyroxin; Testes; Bat; Body weight; Reproduction.	
Resumo: 	The aim of present study was to compare the changes in thyroid gland with the reproductive cycle of S. heathi. Thyroid showed marked seasonal variation in weight, quantity of colloid and follicular epithelial height, suggesting the thyroid gland to be inactive during quiescence and winter dormancy and active during the time of recrudescence and breeding similarly to the testicular cycle. Plasma thyroxin (T4) concentration showed a significant seasonal change with high concentration during breeding and post-breeding and low concentration during quiescence. However, the T4 concentration increased from breeding to post-breeding phase, when the testes weight was declining. It is suggested that in S. heathi the positive correlation between thyroid and testicular cycles occurs only during the phases of the reproductive cycle when the body weight and testicular activity are also closely correlated.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081998000400018	
Editor: 	Instituto Internacional de Ecologia	
Relação: 	10.1590/S0034-71081998000400018	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Biologia  v.58 n.4 1998	
Fonte: 	info:eu-repo/semantics/openAccess