birulautnusantara.comBarramundi (Lates calcarifer) is a high-value fish commodity widely favored in both domestic and international markets. Its cultivation is increasingly developing, including at the household scale, which can serve as an alternative source of income for coastal families. Seed production is a crucial initial stage in the cultivation cycle that determines the success of producing quality seeds. Therefore, the application of appropriate and efficient seed production technology at the household level is essential.

2. Seed Production Methods

2.1 Broodstock Selection

Selected broodstock should have an optimal size (weight 2-4 kg), be healthy, and have reached gonadal maturity. Broodstock are usually kept in tarpaulin ponds or concrete tanks with stable water conditions and good quality.

2.2 Spawning

Spawning can be conducted naturally or assisted hormonally. At the household scale, natural spawning is more commonly used by providing suitable environmental conditions, such as water temperature between 28-32°C and salinity of 15-25 ppt. Hormonal induction using pituitary hormones or synthetic hormone analogs can improve spawning efficiency.

2.3 Egg Incubation

Fertilized eggs are transferred to incubation tanks with adequate aeration and controlled temperature. The incubation period ranges from 18 to 24 hours depending on water temperature. Hatched eggs become larvae and are then reared in seed nursery tanks.

2.4 Larvae and Seed Rearing

Larvae are fed with initial feed such as Artemia nauplii or natural feed like nutrient-rich plankton. High-protein formulated feeds can be gradually introduced. Rearing includes regular water changes and monitoring water quality to optimize larval growth.

3. Results and Discussion

The implementation of seed production technology at the household scale enables the production of barramundi seeds with survival rates of 70-85%. Success heavily depends on proper broodstock selection and spawning environment management. Hormonal use can increase productivity but requires specific knowledge and skills. Good larval care with quality feed also determines seed growth and survival.

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