The effect of dietary protein to energy ratio and stocking densities on fish production, food web enhancement and economic benefit of gift Nile tilapia aquaculture in ponds

Kabir, K. (Speaker), Verdegem, M. (Contributor), Schrama, J. (Contributor), Verreth, J. (Contributor), Michael J. Phillips (Contributor)

Activity: Talk or presentationOral presentation

Description

In non-lined ponds, natural food complements dietary P/E. We assessed the effect of lowering dietary PIE ratio with an increasing stocking density on performance of tilapia, food web enhancement and impact on pond nutrients. The experiment was conducted in a 2x2x2 factorial design: diet (CP:CE ratio 19 vs. 14 g.MJ-1); feeding level; and stocking density (2 vs 3 m-2) in 40 farmers' ponds. Biomass gain increased with a decreasing dietary PIE ratio and increasing stocking density). A negative accumulation of N and P in pond water was noticed for low stocking density ponds. Nitrogen gain in fish was higher for low P/E diet and also influenced by feed per square meter. At low P/E diet, the contribution of natural food to fish production was higher than for the high P/E diet. Net profit increased by lowering the dietary P/E ratio of the diet (2070 vs 1072 US$ ha-1 83 day-1).
Period8 Apr 201912 Apr 2019
Event title12th Asian Fisheries & Aquaculture Forum (AFAF): Transforming Asian Fisheries and Aquaculture for Sustainable Production and Nutrition
Event typeConference
LocationIloilo, Philippines