Precocious recrudescence of seminal vesicle and testis in catfish, Clarias batrachus (Linn.), subjected to a long photoperiod regime.

Abstract:

:The catfish C. batrachus were exposed to a long photoperiod of 14 hr light during resting--early preparatory (December-February) phases of the reproductive cycle. At 70-day sampling, both the seminal vesicle (SV) and testis registered marked stimulatory effects in comparisons to control fish maintained under approximately 10.55 L:13.45D as shown by the increased size and weight. In both the SV and testis, concentrations of total proteins, fructose, hexosamines, and sialic acid were significantly high compared to those of the control fish indicating increased activities of the organs. Serum levels of gonadotropin-II, testosterone, and estradiol-17 beta were significantly high in the long photoperiod group. The results show that exposure to long photoperiod can stimulate early development of both the SV and testis by activating the pituitary--gonadal axis.

journal_name

Indian J Exp Biol

authors

Singh MS,Joy KP

keywords:

subject

Has Abstract

pub_date

1998-12-01 00:00:00

pages

1264-8

issue

12

eissn

0019-5189

issn

0975-1009

journal_volume

36

pub_type

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