Growth and Feed Efficiency of Tiger Grouper (Epinephelus fuscoguttatus) Fed Trash Fish and Pellets
Keywords:
Floating Net Cages, Pellet Feed, Tiger Grouper, Trash FishAbstract
Tiger grouper (Epinephelus fuscoguttatus) culture in floating net cages (FNC) faces major challenges in improving feed efficiency and optimizing fish growth. This study aimed to analyze and evaluate the effectiveness of trash fish and commercial pellet feed on growth, survival rate (SR), feed conversion ratio (FCR), and water quality conditions in tiger grouper aquaculture. The research was conducted at PT Solar Sahara Usaha Mina FNC, Gondol, Bali, for 3 months March 16 – May 17, 2024. The method used was a descriptive experiment with random sampling of 20 fish from a total population of 600, measuring body weight and length every two weeks. The results showed that trash fish feed resulted in a higher daily growth rate (4.543 g/day) compared to pellet feed (3.395 g/day). However, pellet feed produced a higher survival rate (97.3%) and a more efficient FCR value (5.85) than trash fish feed (SR 95.67% and FCR 6.9). In terms of cost, trash fish required lower feed production costs (IDR 1,124,200) than pellet feed (IDR 2,594,592). Water quality parameters remained within optimal ranges: temperature 28–31.2°C, DO 4.8–5.83 ppm, and pH 7.8–8.0. In conclusion, trash fish feed is superior for promoting faster growth at lower costs, whereas pellet feed offers better feed conversion efficiency and higher survival rates.
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