Pengaruh Alkalinitas Terhadap Kelangsungan Hidup Dan Pertumbuhan Larva Ikan Patin Siam (Pangasius sp.) Effect Of Alkalinity On Survival Rate And Growth Of Siam Patin Catfish (Pangasius sp.) fry

Abstract

This study was conducted to examine the effect of alkalinity on survival and growth of Siam patin catfish (Pangasius sp.). Fish larvae were reared in aquaria in density of 4 fishes per liter. Water alkalinity examined was 15 ppm CaCO3 as control, and 25, 50, and 75 ppm CaCO3 as treatments. During first 7 days, larvae were fed on nauplii Artemia sp. 4 times daily and continuing fed on Tubifex sp. for 23 days. The results of study showed that higher survival rate was obtained in treatment 50 ppm CaCO3 (94.16%). Higher daily growth rate was also achieved by that treatment.