Wader stingray (Rasbora argyrotaenia), which is naturally distributed in Southeast Asian countries, has a high demand for both consumption and ornamental fish. Fulfillment of this fish demand is mostly still relying on natural catches because aquaculture production is limited. Cultivation production can be increased through the development of spawning techniques such as giving hormones to synchronize spawning and final gonad maturation, such as increasing spermatic production.

Induction of fish spawning usually uses sGnRH-a (salmon gonadotropin hormone-analog) and domperidone (antidopamine) combined in Ovaprim ™. Intramuscular injection is the method commonly applied to the use of this product. This study aims to determine the optimum dose of Ovaprim ™ induction using the intramuscular injection method to increase sperm production of wader stingrays.

A total of 30 mature male gonads were selected with a weight of 8.58 ± 0.58 g and a length of 5.02 ± 0.84 cm. The dosages of Ovaprim ™ treatment given were 0.15 μl / g, 0.25 μl / g, 0.35 μl / g, 0.45 μl / g, and 0.55 μl / g body weight by intramuscular injection. The parameters observed were sperm volume, sperm concentration, sperm motility, and sperm viability. Observations show that the induction of spermatization has the most significant effect on the increase in sperm volume and concentration at a dose of 0.25 μl / g body weight. Thus, this amount of dosage is recommended to use.

Author: Darmawan Setia Budi, S.Pi., M.Si. Link: https://ivj.org.in/users/members/viewarticles.aspx?ArticleView=1&ArticleID=9414

(Increasing of milt production in male silver rasbora (Rasbora argyrotaenia) administered Ovaprim)