Title: The fatty acid composition of enriched artemia and larvae rearing: An overview of common snook (Centropomus undecimalis) culture

Final project
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Supervisors: Olafur Sigurgeirsson


A holistic understanding of the supply line of nutrients is important for developing diets in marine fish larval culture. This includes adaptation of rearing conditions that meet the larval requirements for the optimal presentation of food organisms and micro diets. This paper combines published literature and unpublished data on common snook reproduction, early life history and on growing in the wild and in captivity. The main focus is to review reports and articles in order to give the best recommendation for commercial scale production in common snook. A general summary of snook culture is presented. The importance of hatchery fry production as an essential culture pre-requisite is emphasized. In addition, an analysis of the main difficulties and constraints for future development is explored. This review pinpoints the gaps in knowledge regarding larval nutritional requirements, the nutritional value of live feeds, challenges and opportunities in the development of the enrichment process. Fatty acid composition in Artemia was analysed after 12 hours enrichment period using three different types of enrichment diets; easy DHA, Algamac 3050 and Algamac 3050+Algamac Enhance. The SFA varies from 16.6-17.1% respectively. MUFA varies from 13.8-30.6% between diets. This percentage shows some difference in comparison with diet 2 and 3, (15.0, 13,8%). PUFA percentages ranges between 47.5-65.8%. The results demonstrate that different methods of enrichment affect the composition of fatty acid and may reach the requirements for marine fish larvae. Information about larvae rearing for common snook has been investigated. It is vital to understand how a better survival rate can be obtained. Some of the most important factors involved in reaching this goal are described.


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