Observation of Egg and Larval Quality of Milkfish (Chanos-chanos Forskall) G1 and G0 Broodstock in Controlled Tanks Supports The Development and Cultivation of Milkfish in The Community

Abstract

Milkfish, a key aquaculture commodity, is vital for industrialization and food security. Obtaining milkfish seeds from nature is challenging, but hatcheries, especially in Buleleng north coast, can produce them in large quantities. However, the varying quality of milkfish eggs has led to a decline in seed quality. Research on G1 and G0 milkfish broodstock development is necessary. The aim is to assess the performance and spawning of G1 and G0 broodstock reared in controlled tanks to aid community cultivation. The study used a descriptive method to evaluate the spawn, eggs, and fry of G0 and G1 broodstock. Results showed that G1 and G0 broodstock have similar spawning and egg quality. G1 broodstock can produce 42,940,000 eggs, with 60-82% fertilization and SAI 2.50-4.12, while G0 can spawn 55,940,000 eggs, with 50-80% fertilization and SAI 2.00-4.40. The G1 derivative’s performance and egg quality are consistent, and the eggs are like the G0 natural broodstock. Milkfish fry production and pond culture cultivation continue to develop in the archipelago.