Optimization of dose of methyltestosterone (MT) hormone for sex reversal in tilapia (Oreochromis niloticus L.)
This paper describes the optimization of dose of methyltestosteronei (MT) hormone for masculinization of tilapia (Oreochromis niloticus). Five treatments (i.e. T1 T2, T2, T4 and T5) with different doses such as 0, 40, 50, 60 and 65 mg of MT hormone were mixed with per kg of feed for each treatment and fed the fry four times a day up to satiation for a period of 30 days. The stocking density was maintained 10 spawn/liter of water. The growth of fry at different treatments was recorded weekly and mortality was recorded daily. At the end of hormone feeding the fry were reared in hapas fixed in ponds for another 70 days and at the 100th day the fish were sexed by the gonad squashing and aceto-carmine staining method. The analysis of growth data did not show any significant variation in length and weight of fish among the different treatments. High mortality of fry ranging 66% to 81.6% was observed in different treatments and highest mortality was observed during the first twelve days of the experiment. The sex ratio analysis showed that T2 (40 mg/kg) and T5 (65 mg/kg) produced 93.33% of sex reversed male and T3 (50 mg/kg) and T4 (60 mg/kg) produced 96.66% sex reversed male, and these ratios were significantly (p<0.05) different from 1:1 male: female sex ratio. The control, T1 (0 mg/kg) contained 43.33% male progeny. From these results it is suggested that either 50 mg/kg or 60 mg/kg of MT with a feeding period of 30 days could be considered as an optimum dose for masculinization of tilapia (O. niloticus).
Main Authors: | Rouf, M.A., Sarder, M.R.I., Rahman, F., Islam, M.F. |
---|---|
Format: | article biblioteca |
Language: | English |
Published: |
2008
|
Subjects: | Aquaculture, Chemistry, Oreochromis niloticus, tilapia, masculinization, methyl testosterone, hormonal sex reversal, |
Online Access: | http://hdl.handle.net/1834/34219 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
An investigation on all male production of Nile Tilapia (Oreochromis niloticus) under the condition of brackish water in Bafgh
by: Bitaraf, Ahmad, et al.
Published: (2013) -
An investigation on all male production of nile tilapia (Oreochromis niloticus) under the condition of brackish water in Bafgh
by: Bitaraf, Ahmad, et al.
Published: (2013) -
Use of proviron tablets as source of androgen for sex reversal of Nile tilapia (Oreochromis niloticus, Linnaeus 1758)
by: Nwachuku, V.N.
Published: (2012) -
Tilapia sex reversal using methyl testosterone (MT) and its effect on fish, man and environment
by: Megbowon, I., et al.
Published: (2013) -
Production of all male fingerlings through feeding of androgenic steroid (Mesterolone) in the diet fed as first food to tilapia Oreochromis niloticus
by: Oyin, O., et al.
Published: (2008)