Convict Cichlid
We have examined the effects of Tribulus terrestris (TT), a non-toxic
herb, on sex reversal in the Convict Cichlid Cichlasoma nigrofasciatum
with the aim of introducing a new environmentally friendly method for
masculinization in C. nigrofasciatum. TT is a natural plant product that
elevates the testosterone levels in humans and animals. Different
concentrations (0.0,
0.10, 0.20 and 0.30g/l) of TT extract were tested for their effect on sex reversal in C. nigrofasciatum by immersing newly hatched offspring once weekly for 2months in TT extract. Of the dosages used in the present study, 0.30g/l
TT was the most effective in terms of masculinization, resulting in a maximum male ratio of 87.23% (P<0.001). Sex ratios of 79 and 85% at 0.10 and 0.20g/l TT, respectively, were also significantly different from the expected
1:1 ratio (P<0.001). Histological examinations revealed that the testes of fish treated with TT extract contained all stages of spermatogenesis,
0.10, 0.20 and 0.30g/l) of TT extract were tested for their effect on sex reversal in C. nigrofasciatum by immersing newly hatched offspring once weekly for 2months in TT extract. Of the dosages used in the present study, 0.30g/l
TT was the most effective in terms of masculinization, resulting in a maximum male ratio of 87.23% (P<0.001). Sex ratios of 79 and 85% at 0.10 and 0.20g/l TT, respectively, were also significantly different from the expected
1:1 ratio (P<0.001). Histological examinations revealed that the testes of fish treated with TT extract contained all stages of spermatogenesis,
Convict Cichlid
Convict Cichlid
Convict Cichlid
Convict Cichlid
Convict Cichlid
Convict Cichlid
Convict Cichlid
Convict Cichlid
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