Sex reversal of Nile tilapia (Oreochromis niloticus) uisng aqueous extract of malabar spinach (Bαsellα αlba [manuscript]
Loading...
Date
2018
Authors
Kris Angel G. Pineda
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Sex reversal using synthetic hormones is one of the nematodes of producing monosex fish for higher production. The study evaluated the effects of aqueous extract of Malabar spinach (Bαsellα αlbα) in sex-reversal and survival of Nile tilapia fry. The treatments evaluated were: Treatment I - control diet (0% B. αlba Aqueous extract); Treatment II - diet with 18 mL extract from B. αlbα; Treatment III - diet with 27 mL extract from B.αlbα; Treatment IV - diet with 36 mL extract from B. αlba; Treatment V - diet with 70 mg of 17α-methyl testosterone. Results of the study showed that Nile tilapia fed with diet containing 36 mL extract from B. αlbα had the highest percent male. Statistically, the percentage of males in the T1 (control diet) was significantly different (P<0.05) compared to other treatment groups while fish fed with diets containing aqueous extract of B. αlbα (T2, T3 and T4) were not significantly different with those fish fed MT (T5) treated diet. Nile tilapia fed with diet containing 18 mL extract from B. αlbα (T4) were significantly different (P>0.05) compared to fish fed containing 70 mg of 17α-methyl testosterone (T5), while fish fed with pure commercial feeds (T1) and treatments with aqueous extract pf B. αlbα (T2, T3, T4) had no significant difference. The results indicate that the dietary treatment with aqueous extract of B. αlbα has no adverse effects on general fish health and have render the androgenic activity of the extract for producing an all male-tilapia population.