Cultivation technique of Chanos chanos modular system and semi intensive at the center for brackish water aquaculture (BBPBAP) Jepara, Central of Java

Milkfish (Chanos chanos) is a commodity that has the highest increase in consumption value, which is 24.55%. Milkfish production centers in Indonesia have developed such as in East Java, South Sulawesi, West Java, Central Java, and Southeast Sulawesi (DJPB, 2015). The technology of enlargement and seeding has been mastered and developed in the community, for example modular, semi-intensive and intensive systems. The difference in the growth of modular and semi-intensive milkfish systems has been observed in the Center for Brackish Water Aquaculture (BBPBAP) Jepara, Central Java on 19 December 2018 until 19 January 2019. Since 1 month, milkfish was observed with long, heavy growth parameters, life velocity of milkfish, and water quality. Milkfish enlargement techniques are preparation of ponds, liming, fertilization, stocking of milkfish logs, management of water quality, pest and disease control, and harvesting. Based on observations made, the growth in length and weight of milkfish develops faster using semi-intensive systems compared to modular systems. The semi-intensive system also speeds up the harvest of milkfish, which are generally 6 months to 4 months.