The Effect of Different Stocking Density of Eggs on The Production of Sangkuriang Catfish Seeds (Clarias gariepinus Burchell 1822) by Using Filtration System

This study aims to determine the production capacity of sangkuriang catfish (Clarias gariepinus) with different high egg density in ponds using filtration system. The research is held in Hatchery Fisheries and Marine Science Faculty, Diponegoro University Semarang on December 2017 - January 2018. The test fish used was sangkuriang catfish eggs that hatch and then maintained with maintenance time for 17 days. This research used experimental method with Completely Randomized Design, consisting of 3 treatments with 3 replications i.e, P1 (egg 50 g), P2 (egg 60 g), and P3 (egg 70 g). Variables which was measured include fertilization rate (FR), hatching rate (HR), absolute length growth (L), absolute weight growth (WG), specific growth rate (SGR), production (ind) and water quality. Data were analyzed by multiform analysis, then Duncan double area test to know the difference between treatment to determine the best treatment. The results showed that the different density of the stocked eggs had significant effect (P<0.05) on the HR, L and WG, SGR, SR and production, but no significant effect (P> 0.05) on FR. Treatment P1 showed the best result with value of FR was 92.6 ± 2.10%, HR was 91.33 ± 0.42%, L was 1.50 ± 0.10 cm, WG was 0.13 ± 0.01 gr, SGR was 22.9 ± 0.55%/day, and seed production was 25,323 ± 345.01 ind.