The effect addional omega-3 in feed on the gonadal maturity level and fecundity of female silver rasbora, Rasbora argyrotaenia

Abstract

Silver rasbora (Rasbora argyrotaenia) is a high-value commodity. The problem in cultivation of silver rasbora is long goanadal maturation period. The gonadal maturation period can be accelerated by manipulation of feed using omega-3. Omega-3 can affect reproductive performance, egg development, and fish embryogenesis. The purpose of this study was to determine effect of addition of omega-3 in feed on gonadal maturity level and fecundity of silver rasbora. The observed parameters are gonadal maturity level, gonado somatic index, gonado index and fecundity. This research applied a completely randomized design (CRD) method which consist of four treatments, namely control (0 mg/kg feed), P1 (2500 mg/kg feed), P2 (5000 mg/kg feed), and P3 (7500 mg/kg feed). The result of this study was indicate addition of omega-3 to feed increased gonadal maturity at GML IV stage and had a signicantly effect on the gonado somatic index, gonado index, and fecundity of female silver rasbora. The optimal dose of omega-3 for silver rasbora gonads is 7500 mg/kg of feed, which results in an increase in gonadal maturity to GML IV with a GSI of 18,89 ± 2,24%, a GI of 143,63 ± 6,66 and fecundity of 924,76 ± 9,21 eggs/parent.

Effect of Pregnant Mare Serum Gonadotropin and Antidopamine on the gonads of female bileh fish (Rasbora maninjau)

“…In the vitellogenesis process, the oocyte volume enlarges, and the increase in GSI value aligns with the rise in fish gonad volume [17]. The vitellogenesis process is responsible for fish's high and low GSI values [20]. Administration of PMSG + antidopamine can provide hormonal stimulation of early gonadal development of bileh fish (Figure 2).…”

“…TKG results are in accordance with the GSI value, where the highest GSI value is found in P3 and P4, which produce the highest TKG IV, as much as 60%. Seluang fish (Rasbora einthovenii) had 50% TKG IV [17] and silver rasbora produced 70% TKG IV [20]. Internal and external factors greatly influence the TKG value.…”