Aquaculture is currently the foundation of the world's animal protein provider. The sustainability of this sector is greatly influenced by business governance which must prioritize environmentally friendly aspects. Nutrient enrichment waste and the spread of fish and other aquatic organisms are significant issues present in aquaculture systems throughout the world today, especially intensive aquaculture. The purpose of writing this article is to provide an overview of biofloc as a solution in overcoming environmental problems for a sustainable future aquaculture. Intensive aquaculture applies high density maintenance and artificial feeding. The system leads to environmental problems because a large amount of waste produced contains solids and nutrients that accumulate into pollutants that cause eutrophication and toxins for aquatic organisms. Biofloc technology is a new approach to reduce the waste of aquaculture activities. In this system, heterotrophic bacteria and algae are grown together in flocks under controlled conditions with no or minimal water exchange. Biofloc is a nutrient package that can be utilized directly by farm animals. Biofloc also acts as biocontrol. Biofloc technology can help overcome problems in intensive aquaculture.
Aim of this research were isolation of probiotics candidate from digestive tract of Danau Panggang swamp fishes and amylolitic, proteolytic, and lipolyticenzyme activity test. Sample fishes were snake head (Channa striata), climbing perch (Anabas testudineus), and Siamese gouramy (Trichogaster pectoralis) as a refresentatif sample from carnivorous, omnivorous, and herbivorous fish. Medium containing starch, skim milk and olive oil used as selective media. Result of this research was successfully isolated probiotic candidate whom grow well and had enzyme activity from C. Striata obtained 11 isolate, 12 isolate from A. testudineus and T. pectoralis respectively. Higher amilolytic activity was C3GHDP, I3PDP4 had a higher lipolytic activity, D4SSDP1 and H3PDP had a higher proteolytic activity. Among those isolate G1PDPsp had a amilolytic, proteolytic and lipolytic activity.
Until now, the nutritional needs of larvae have only been partially identified and much is still unknown. The nutritional needs of climbing perch larvae after the yolk has been absorbed requires a comprehensive study. The research took place at the Wet Laboratory, Faculty of Agriculture, Achmad Yani University.The objective of this research was to study about climbing perch (Anabas testudineus Bloch) larvae viability on removal of exogenous food by distribution of dissolved organic matter from fermentation of chicken waste. Completely randomized design with 4 treatments and 6 replicates was used in this research. Application dissolved organic matter was 250 mL/aquaria (A), 500 mL/aquaria (B), 750 mL/aquaria (C), and without dissolved organic matter (D). The data is analyzed using analysis of variance (Anova), and Duncan's Multiple Range Test (DMRT). Larvae survival rate for all treatments was very low. Each reached 0% in days 9 and 10 for treatment A and B. For treatment C and D in day 8. Anova result indicated that dissolved organic matter had significant effect (P<0.05) to absolute growth of larvae. DMRT test showed that each treatment had significant difference, except treatment C to D had no difference. The best growth for this research was treatment B.
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