Evaluation on Fecundity of Jelawat (Leptobarbus hoevenii, Bleeker 1851) Cultured in Floating Net Cages in Swampy Pond, Jambi

Abstract

The economic importance of riverine fish species of jelawat (Leptobarbus hoevenii) has been traditionally cultured. The culture development requires the availability of fish fry from hatcheries in sufficient quantities. Estimation of the fry production requires data and information on its fecundity. A study was carried out to evaluate the fecundity of jelawat cultured in floating net cages set in a pond, Jambi. The broodfish used in the study were selected from grown-out ponds. Selection of matured egg female fish was carried out monthly. The matured gonadal female fish was weighed and injected using a 0.7 mL/kg commercial hormone. The eggs were stripped and weighed. Egg samples were taken out as a subject of weight measurement per g. The results showed that the broodfish’s length and weight ranged from 47.0-60.0 cm (57.6 cm ± 3.30) and 1500-4500 g (3100 g ± 0.71), respectively. Fecundity tended to increase with increasing total length and weight of the fish, respectively. The average egg somatic index value was 11.04% ± 1.92. One gram of fish eggs consisted of 590 eggs ± 29.51. The number of eggs of the females ranged from 32 103 - 96 557 per kg.