Hormonal induction for maturation, ovulation and successful level of spawning on striped snakehead (Channa striata)

D Radona, II Kusmini, TH Prihadi… - Aquaculture …, 2020 - search.proquest.com
Aquaculture, Aquarium, Conservation & Legislation, 2020search.proquest.com
Striped snakehead (Channa striata) is an essential commodity with potential important
economic value as a consumable fish and a source of albumin-producing products. This
study aimed to determine the optimal dose of hormones to be used in maturation, ovulation,
and the effects of the hormones on the reproductive performance of striped snakehead in
improving productivity. This study on the maturation and ovulation of striped snakehead was
conducted experimentally using a completely randomized design (CRD) with 4 treatments …
Abstract
Striped snakehead (Channa striata) is an essential commodity with potential important economic value as a consumable fish and a source of albumin-producing products. This study aimed to determine the optimal dose of hormones to be used in maturation, ovulation, and the effects of the hormones on the reproductive performance of striped snakehead in improving productivity. This study on the maturation and ovulation of striped snakehead was conducted experimentally using a completely randomized design (CRD) with 4 treatments and 3 replications. The maturation activity used 12 prospective broodstock measuring 23.75±0.80 cm in standard length and 238.08±8.66 g in weight. Striped snakeheads were marked and maintained communally in ponds measuring 3 mx 5 m with a water level of about 1 m. Maturation induction used a combination of pregnant mare serum gonadotropin (PMSG) and anti-dopamine hormones with doses as follows:(A) 2.0 mL kg-1,(B) 2.25 mL kg-1,(C) 2.5 mL kg-1 and (D) controls (without hormone induction). Hormone induction was performed once every 10 days for the 30 days of rearing. Ovulation activity, using striped snakehead female broodstock at a gonad maturation stage of GMS IV, was carried out by measuring the length (27.72±2.41 cm) and weight (336.67±39.02 g) of the fish. Ovulation induction used different doses of hormones, ie (A) LHRHa 0.6 mL kg-1,(B) HCG 500 IU+ LHRHa 0.6 mL kg-1,(C) oxytocin 1 IU+ LHRHa 0.6 mL kg-1, and (D) controls (without hormone induction). The results of the maturation study showed that striped snakehead broodstock induced with a combination hormone PMSG+ AD (2.5 mL kg-1) had the highest gonadosomatic index (GSI, 3.21±0.26%) and fecundity (5.268±410 egg per fish) at the GMS IV. On the other hand, the ovulation study also showed that striped snakehead broodstock induced using a combination hormone HCG 500 IU+ LHRHa 0.6 mL kg-1 had the fastest ovulation latency period with high ovulation rate, 21 hours 8 minutes and 100%, respectively, when compared with other treatments. The application of breeding technology on striped snakehead using hormones can accelerate the process of gonad maturation with a higher success level of spawning.
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