Performance analysis of white snapper ( Lates calcarifer) nursery at BBPBAP Jepara

White snapper (Lates calcarifer) is a fish with high economic value that can meet domestic and foreign needs. It's aquaculture activity has become a commercial business. The growth of white snapper is relatively fast and has high body resistance to environmental changes. BBPBAP plays a role in the fulfillment of superior seeds through nursery activities for white snapper. This study aimed to identify and analysis the performance of white snapper nursery activity in BBPBAP Jepara. Nursery techniques for white snapper included pond preparation, seed stocking, grading, feed management, water quality management, pest and disease control, and seed harvesting. Nursery of white snapper was carried out in concrete ponds with stocking densities ranging from 1000-1500 fish/pond. The percentage of white snapper nursery in the form of seed survival rate at harvest was 80%, feed conversion ratio was 1.51. The average results of water quality parameters in white snapper fish rearing ponds included salinity ranging from 30-35 ppt, DO ranging from 3.2-3.8 mg/L, and water temperature ranging from 28.6-32.6 °C.