Thyroxine-induced alterations in the testis and seminal vesicles of air-breathing catfish, Clarias gariepinus.
Effect of experimentally induced thyroxine overdose on the testis and seminal vesicles was studied in the air-breathing catfish, Clarias gariepinus during the preparatory and the pre-spawning phase. The present study revealed a marked reduction in testosterone level in serum, testis and seminal vesicles (SV). Histological examination showed a considerable reduction in the number of spermatozoa/spermatids in the seminiferous tubular lumen as well as depletion of fluid in the loculi of SV. SDS-PAGE analysis of SV fluid proteins demonstrated a significant decrease in the level of a ~27 kDa protein in thyroxine treated fishes. Evidences are presented here to indicate that thyroid hormone plays a role in regulating testis and SV function in catfish.
Jacob
T N
TN
Department of Animal Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, 500 046, India.
Pandey
J P
JP
Raghuveer
K
K
Sreenivasulu
G
G
Gupta
A D
AD
Yoshikuni
M
M
Jagota
A
A
Senthilkumaran
B
B