Effects of lipid enrichment of Artemia nauplii for feeding of spiny lebbeid shrimp, Lebbeus groenlandicus (Fabricius, 1775), zoea larvae

This study was conducted to determine the optimum feed selection for the spiny lebbeid shrimp, Lebbeus groenlandicus, from zoea to megalopa larva. To the shrimp zoeae, untreated hatching Artemia meta-nauplii, or either of two kinds of enriched Artemia, were supplied as feed daily, in a concentration of 3 individuals/ml. Throughout the experimental trials, 17.6-18.1 days elapsed until reaching the megalopa larval stage. In the starving trials, no mortality was observed; the mortality values observed in the experimental trials, between 4.8 and 9.5% were considered low and not significantly different (). Neither fatty nor amino acids varied significantly in the zoea I and II stages in either the feeding or starving trials. Highly unsaturated fatty acids and amino acids were significantly lower in the megalopa stage in the starving group, compared with the feeding groups (). Therefore, feeding was proven not to have any effect in the zoea I and II larval stages. However, for the megalopa larval stage, a feed containing supplementary amino acids and fatty acids evoked a positive effect.