Abstract
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).
Original language | English |
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Title of host publication | Book of abstracts of the 12th Asian Fisheries & Aquaculture Forum (AFAF) |
Subtitle of host publication | Transforming Asian Fisheries and Aquaculture for Sustainable Production and Nutrition |
Pages | 315-315 |
Number of pages | 1 |
Publication status | Published - 12 Apr 2019 |
Event | 12th Asian Fisheries & Aquaculture Forum (AFAF): Transforming Asian Fisheries and Aquaculture for Sustainable Production and Nutrition - Iloilo Convention Center, Iloilo, Philippines Duration: 8 Apr 2019 → 12 Apr 2019 https://www.afsconferences.net/category/afaf/ |
Conference
Conference | 12th Asian Fisheries & Aquaculture Forum (AFAF) |
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Country/Territory | Philippines |
City | Iloilo |
Period | 8/04/19 → 12/04/19 |
Internet address |