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

Abstract

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.

Performance analysis of Brachionus plicatilis production with different densities

“…The method used in the implementation of general practice is the collection of primary data obtained from observations, interviews and active participation as well as secondary data obtained from literature studies ranging from books, journals, reports, theses and so on. Primary data is data that is directly related to field activities, which is obtained from the first source in the form of words, actions, and other data such as documentation, unprocessed information and by making observations [2]. Secondary data is data obtained or collected by researchers from various existing sources [2].…”

“…Primary data is data that is directly related to field activities, which is obtained from the first source in the form of words, actions, and other data such as documentation, unprocessed information and by making observations [2]. Secondary data is data obtained or collected by researchers from various existing sources [2].…”

Leaf extract effectiveness of pecut kuda (Stachytarpheta jamaicensis L. Vahl) on barramundi (Lates calcarifer) eggs hatchability

“…Barramundi (Lates calcarifer) is one of the premium marine and brackish water aquaculture products in Indonesia because of its relatively fast growth rate and ability to adapt to fluctuations in environmental change [1], this makes barramundi suitable for small and large-scale aquaculture companies. It has been proven that barramundi can be cultured in ponds or floating net cages in brackish water or seawater [2], [3].…”

“…The successful development of barramundi aquaculture is largely determined by the supply of good quality and quantity broodstock, eggs and larvae [6]. One of the factors affecting the success of the farming crop is the high egg-hatching rate and larval survival rate, so barramundi seeds are always available [1]. Obstacles to the availability of barramundi seed often include the existence of fungi that attack fish eggs, both unfertilized and fertilized, leading to reduced 2 hatchability and survival rates.…”