Volume : IV, Issue : IV, April - 2014

MASCULINIZATION OF GYMNOCORYMBUS TERNETZI (BOULENGER) USING 17 ? –METHYL TESTOSTERONE WITH CONTINUOUS IMMERSION

B. Uma

Abstract :

 In Gymnocorymbus ternetzi , 100% masculinization had been induced successfully, for the first time , using  continuous  immersion techniques  with   17 a – Methyl testosterone. Control population had a highly skewed sex–ratio in favour of males (59%), possibly due to temperature induced / based natural sex reversal.  Intersexes were also observed in the control stock.  For  10mg/l (single dose) of continuous immersion of 5 –day old posthatchlings with 17  a – Methyltestosterone resulted in cent percent males with survival rate of 42%   However, a strict dose –dependent mortality was not observed.  Super.–optimal doses  of  50, 100mg/l of 17 a  –MT demonstrated paradoxical feminization. However, a strict dose –dependent mortality was not observed.  Intersexes were observed in the hormone  exposed lots at both sub–optimal and super–optimal doses.  Sexes were identified through gonadal squash

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Article: Download PDF   DOI : 10.36106/ijar  

Cite This Article:

B.Uma MASCULINIZATION OF GYMNOCORYMBUS TERNETZI (BOULENGER) USING 17  -METHYL TESTOSTERONE WITH CONTINUOUS IMMERSION Indian Journal of Applied Research, Vol.IV, Issue. IV

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