Relationship of mangrove environment to the shrimps and milkfish production in silvofishery area of Blanakan, Subang, West Java

Abstract. Suryaperdana Y, Soewardi K, Mashar A. 2012. Relationship of mangrove environment to the shrimps and milkfish production in silvofishery area of Blanakan, Subang, West Java. Bonorowo Wetlands 2: 74-85. Silvofisheries represent an integrated approach to conserving and utilizing mangrove resources to maintain a relatively high level of integrity in the mangrove area while capitalizing on the economic benefits of brackishwater aquaculture. This research aims to assess the environmental conditions of mangrove ecosystem condition and its relation to farmed shrimp, milkfish, and nature shrimp production in the silvofishery area Blanakan, Subang, West Java. And to see the relationships between the mangroves with the production of fisheries, then analyzed by the method of regression analysis. An attempt has been made to relate the surface areas of mangroves and the commercial shrimp production in those areas and adjacent waters in Indonesia. A significant linear relationship (? = 0.05) was obtained between these two variables as expressed in an equation: y = 3.783 x +23.13, with r2 value of 90.2% where Y is kg the nonfarming production (natural shrimp) and X is the mangrove surface. This relationship indicates that the shrimp production increases with the size of the mangrove area, implying that any reduction of the tidal forests, purposes will cause a decrease in shrimp yield. Meanwhile, the result of regression analysis between the surface areas of mangrove with farming production (shrimp and milkfish) obtained the equation y = 0, 819x 235.3 with a value of r2 = 30.5%. The existence of mangroves can affect environmental conditions, the content of chlorophyll-a relatively higher, stable pH, and DO relatively better. Meanwhile, farming production (shrimp and milkfish) showed uncertain conditions because the success of farmed fish (shrimp and milkfish) is more determined by the management of ponds.