Microbound larval feed as supplement to live food for milkfish (Chanos chanos Forsskal) larvae
Abstract
Highly variable results using Brachionus as food for milkfish (Chanos chanos) larvae may be related to: (1) relatively low content of highly unsaturated fatty acids (HUFAs) in Brachionus and (2) inability of first feeding larvae (day 2) to ingest rotifers in sufficient numbers. Early supplemental feeding with a microbound diet high in HUFAs may improve growth and survival of milkfish larvae.
Citation
Marte, C. L., & Duray, M. N. (1991). Microbound larval feed as supplement to live food for milkfish (Chanos chanos Forsskal) larvae. In P. Lavens, P. Sorgeloos, E. Jaspers, & F. Ollevier (Eds.), Larvi ’91 - Fish & Crustacean Larviculture Symposium (pp. 175-177). Gent, Belgium: European Aquaculture Society.
Publisher
European Aquaculture SocietySubject
Type
Conference paperCollections
- Conference Proceedings [283]
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Conference paper
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Conference paper
Changes in lipid and fatty acid content during early larval development of milkfish (Chanos chanos): influence of broodstock diet
- In CL Marte, GF Quinitio & AC Emata (Eds.), Proceedings of the Seminar-Workshop on Breeding and Seed Production of Cultured Finfishes in the Philippines, Tigbauan, Iloilo, Philippines, 4-5 May 1993, 1996 - Aquaculture Department, Southeast Asian Fisheries Development CenterThe influence of amount and type of lipid given to milkfish broodstock by developing larvae was investigated by feeding broodstock commercial diets that differed in lipid content and composition. The two commercial feeds used had the following proximate composition: RFP - 28.16% crude protein, 2.40% crude fat, 7.58% crude fiber, 53.94% N-free extract; RCP - 43.28% crude protein, 4.58% crude fat, 6.18% crude fiber, 37.0% N-free extract. The lipid content and fatty acid composition of spawned milkfish eggs reflected that of the broodstock feed. Percent lipid in egg from broodstock fed RFP and RCP dropped by 22.5% and 26.9% in newly-hatched larvae and by 53.0% and 65.0% in day 2 larvae (>90% yolk resorbed), respectively. Decreases in total PUFA and increase in monoenoic fatty acids during yolk resorption indicate that milkfish as in other marine fishes utilize PUFA during early larval development. While differences in rate of utilization of individual n-3 and n-6 FA in two groups of larvae seem to be influenced by levels of the fatty acids in eggs, the influence of other nutrients on fatty acid utilization need to be investigated.
