Effects of constant photoperiod-temperature regimes on testes and pituitary gonadotropic cells of the murrel, Channa punctatus (Bloch) during the annual reproductive cycle.
Mal Channa punctatus were maintained under constant photoperiod-warm temperature regimes (LD 16:8 and LD 8:16 at 30 degrees C) for one year. LD 16:8 regime stimulates testicular maturation and the activity of gonadotropic cells whereas LD 8:16 regime inhibits testicular maturation and also activity of gonadotropic cells. These results indicate a close correlation between the activity of gonadotropic cells and testes under long and short photoperiods at 30 degrees C regimes.
Department of Zoology, S.M.M. Town Post-Graduate College, Ballia, India.
S J
SJ
Srivastava
R
R
Singh
D000818:Animals; D005399:Fishes / Q000502:physiology; D006065:Gonadotropins, Pituitary / Q000378:metabolism*; D006358:Hot Temperature; D008297:Male; D017440:Photoperiod; D010903:Pituitary Gland, Anterior / Q000166:cytology*; D012098:Reproduction; D012741:Sexual Maturation; D013737:Testis / Q000033:anatomy & histology*
D006065:Gonadotropins, Pituitary