Masculinization of silver perch (bidyanus bidyanus mitchell 1838) by dietarysupplementation of 17 a-methyltestosterone
MetadataShow full item record
The aim of this research was to assess the possible use of dietary supplementation of 17a-methyltestosterone (MT), to produce all-male population of silver perch, Bidyanus bidyanus Mitchell 1838, as a step forward in producing neomales, which later can be used to produce an all-female population. Larvae were fed 17a-MT at various concentrations, viz. 0 (control), 9 and 18 mg/kg diet for the period of 30 days from 31 to 60 days post hatching (dph). Phenotypic sex ratios at 225 dph identified through histological examination revealed that MT significantly (P < 0.05) increases the male percentage from 59% to 100%. Testes of MT-fed fish were well developed, had a normal appearance at the same developmental stages to that of the control group. No significant differences (P > 0.05) in gonad weight (GW), gonad length (GL) and gonadosomatic index (GSI) among treatments which may indicate that the resulting neomales were viable. The MT supplementation did not influence the mortality rate, but significantly (P < 0.05) increased the final weight and specific growth rate (SGR). The study suggests that the dietary supplementation of MT at 9–18 mg/kg of the diet from 31 to 60 dph larvae is effectively in inducing masculinization in silver perch.
Showing items related by title, author, creator and subject.
Wangpen, Prayadt (2007)Research into the polyculture of finfish and crayfish has been conducted in Western Australia for over a decade now. This research was instigated out of a need to increase revenues from freshwater crayfish farmers wishing ...
Effect of Dietary Estradiol-17ß on the Feminization of Silver Perch, Bidyanus bidyanus (Mitchell, 1838)Sulaeman; Fotedar, Ravi (2016)The silver perch, Bidyanus bidyanus (Mitchell 1838), displays sexual dimorphism in size, with females reaching larger maximum size than males. In an attempt to produce all-female populations, larvae at 30 d posthatching ...
Masculinization of silver perch (Bidyanus bidyanus Mitchell 1838) by dietary supplementation of 17a-methyltestosteroneSulaeman; Fotedar, Ravi (2017)The aim of this research was to assess the possible use of dietary supplementation of 17a-methyltestosterone (MT), to produce all-male population of silver perch, Bidyanus bidyanus Mitchell 1838, as a step forward in ...