Abstract
The administration of methallibure (2 microg/g BW, daily for 15 days) in Clarias batrachus in prespawning phase (May-June) resulted in decreased weights of seminal vesicle (SV) and testis, and reductions in the concentrations of total proteins, fructose, hexosamines, and sialic acid in SV and testis. The inhibitory changes can be attributed to impairment of steroidogenesis, serum levels of testosterone and estradiol -17beta decreased significantly. Withdrawal of methallibure treatment for 7 and 15 days resulted in gradual recovery and restoration of all the above parameters except the sialic acid levels in the SV and testis, and fructose level in the SV. The methallibure induced regressive changes in the SV and testis were discussed in the light of its GTH inhibiting property.
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