Effects of varying dietry fatty acid composition on growth and survival of seahorse, Hippocampus sp. juveniles

Chang, Marshall, and Southgate, Paul C. (2001) Effects of varying dietry fatty acid composition on growth and survival of seahorse, Hippocampus sp. juveniles. Aquarium Sciences and Conservation, 3 (1-3). pp. 205-214.

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Abstract

Three commercially available fatty acid enrichment emulsions (DC Selco, DC DHA Selco and DC Super Selco) were used to enrich Artemia nauplii fed to seahorse, Hippocampus sp. fry. The emulsions varied in their n-3 highly unsaturated fatty acid (HUFA) composition. Total n-3 HUFA content ranged from 200 to 450 mg g⁻¹ between the three emulsions while levels of eicosapentaenoic acid (EPA, 20 : 5n-3) and docosahexaenoic acid (DHA, 22 : 6n-3) ranged between 47–220 and 80–190 mg g⁻¹, respectively. Survival and growth of seahorses at the end of the 30 day growth trial were greater in treatments receiving enriched Artemia. Seahorses receiving Artemia enriched with DC DHA Selco and DC Super Selco showed significantly (p < 0.05) greater mean survival (71.6 ± 6.0% and 78.3 ± 6.0%, respectively) than those receiving unenriched Artemia (48.3 ± 6.0%). Mean standard length was also significantly greater (p < 0.05) in fry fed DC DHA Selco and DC Super Selco enriched Artemia (20.2 ± 0.3 and 19.7 ± 0.3 mm, respectively) compared to those fed unenriched Artemia (18.1 ± 0.3 mm). The results show that dietary n-3 HUFA are essential for optimal growth and survival of Hippocampus sp. and, based on the fatty acid compositions of the enriched Artemia used in this study, indicate that the level of dietary DHA supporting optimal growth and survival is greater than 9.3 mg DHA g⁻¹ dry weight.

Item ID: 13079
Item Type: Article (Refereed Research - C1)
Keywords: Artemia; enrichment; highly unsaturated fatty acids (HUFA); Hippocampus; seahorse
ISSN: 1573-1448
Date Deposited: 26 Jul 2012 05:02
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 100%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 100%
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