Kelangsungan Hidup dan Pertumbuhan Ikan Pala Pinang (Desmopuntius pentazona) dalam Wadah Pemeliharaan dengan Warna Berbeda

Abstract

Fiveband Barb (Desmopuntius pentazona) is a freshwater ornamental fish species of Bangka Island. Domestication of the fish is important because tin mining activites threaten the fish. One of influencing factors of its survival and growth rate is tank color. Light intensity is one of the environmental factors which significantly affect on survival rate and growth of aquatic organisms. Tank colors may affect light wavelength, while light intensity affects the fish feeding. The purpose of the study was to determine the best tank color for survival rate and growth performance of Fiveband Barb. Tank colors used in this study consisted of transparent, brown, red, and blue. Fiveband Barb with 29.72 ± 0.24 mm length and 0.33 ± 0.02 g weight were reared in the tanks of 40 × 30 × 30 cm³ filled with 15 L of water and were fed with bloodworm larvae ad libitum. The results showed that tank color gives significant effect (P < 0.05) on the survival rate of the fish where in transparent, brown, red, and blue tanks they were 100 ± 0; 83 ± 7; 100 ± 0; dan 60 ± 22%, respectively. Spesific growth rate in transparent, brown, red, and blue tanks were 0.011; 0.008; 0.010; and 0,009%/day, respectively. Absolute weight growth rate in transparent, brown, red, and blue tanks were 0,43; 0,31; 0,39; dan 0,37 g, respectively, while absolute length growth rate in transparent, brown, red, and blue tanks were 1,40; 0,73; 1,22; dan 0,52 mm, respectively. Therefore, the transparent and red tanks were the best tank colors for Fiveband Barb culture. This is presumably because the light intensity entering the transparent and red tanks was higher than the other two colors so as to maximize feed consumption in supporting the survival and growth of the fish.