Open AccessThe Potential of Red Kwao Kreua (Butea superba) in Inducing Sex Reversal on Three Strains (Red, Ghana, Chitralada) of Nile Tilapia (Oreochromis niloticus L.) and the Effect of 17-α-Methyltestosterone (MT)
Author(s) -
Kriangsak Mengumphan,
Y. Samitasiri,
R. Carandang
Publication year - 2007
Publication title -
asian fisheries science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.275
H-Index - 7
eISSN - 2073-3720
pISSN - 0116-6514
DOI - 10.33997/j.afs.2006.19.3.007
Subject(s) - nile tilapia , oreochromis , zoology , sex reversal , biology , tilapia , methyltestosterone , significant difference , sex ratio , toxicology , feed conversion ratio , negative control , veterinary medicine , fish <actinopterygii> , body weight , fishery , traditional medicine , medicine , endocrinology , biochemistry , population , environmental health , gene
The present study aimed to investigate the potential of red kwao kreua and compare the effect between two MT dosage regimens in terms of inducing sex reversal, survival rate, feed conversion ratio and gain in weight on red, ghana and chitralada strains of Nile tilapia. Red kwao kreua, 100 g kg-1 , 200 g kg-1 and 300 g kg-1 , dried and pounded roots and 40 and 60 mg kg-1 MT were prepared and mixed per one kilogram fishmeal. Results revealed that MT treatments had a comparable effect in terms of male sex ratio, SR, FCR and GW and are statistically significant as compared to the control. Red kwao kreua treatments did not have significant difference with the control and with the MT treatments in some cases. However, a 72.2 + 25.5 % male sex ratio was obtained in treatment 3 of the chitralada strain. As to the effect of the treatments on the three strains it was observed that they generally have comparable effects.