Abstract:
The project was designed with the goals to determine the optimal dose rate of oral administration of the androgen 17a-Methyltestosterone (MT) for sex reversal fish seed of Cyprinus carpio as well as the meat quality (proximate composition). Sex reversal was completed in ten glass aquaria (70 L capacity each), where fish fed (30% crude protein) with 25, 50, 75 and 100 mg MT.kg-1 along with control (without MT hormone diet). In the glass aquaria feed was given @ 2% of wet body weight of fish twice daily for thirty days. After the treatment of MT, the fingerlings were shifted to earthen ponds for 281 days and feeding was done with 30% CP without hormone diet @ 2% body weight daily. All MT treated on maturation showed sex reversal in C. carpio, with a significantly higher male proportion than female as compared to control treatment. Dose rate of 100 mg MT.kg-1 of feed oral administration for 30 days resulted in maximum sex reversal i.e., 100% male population. Fish production was 1.42 times higher in 100 100 mg MT.kg-1 (2398.83 kg.ha-1.yr-1) as compare to control treatment (1693.58 kg.ha-1.yr-1) was estimated. Proximate body composition of control and treated fish showed a highly significant difference with respect to moisture, crude protein, fat, ash and gross energy, while it remain non-significant with respect to carbohydrates and nitrogen free extract. In treatment T25 the protein was minimum as 15.58%, while the maximum protein was found in that treatment in which MT was given @ 100 mg.kg-1 of diet. Sex reversal showed an increasing trend of crude protein and fat deposition as hormone (MT) concentration increased.
Page(s):
971-975
DOI:
DOI not available
Published:
Journal: International Journal of Agriculture and Biology, Volume: 13, Issue: 6, Year: 2011