Influence of one selectedTisochrysis luteastrain rich in lipids onCrassostrea gigaslarval development and biochemical composition

• DOI: 10.1111/anu.12301
• Publication Date: 2015-02-13T10:02:21Z
• Authors: F. Da Costa; B. Petton; C. Mingant; G. Bougaran; C. Rouxel; C. Quéré; G.H. Wikfors; P. Soudant; R. Robert
• Keywords: Strain (injury); Tetraselmis

Effects of a remarkably high overall lipid Tisochrysis lutea strain (T+) upon gross biochemical composition, fatty acid (FA), sterol and class composition Crassostrea gigas larvae were evaluated compared with normal (T) the diatom Chaetoceros neogracile (Cg). In first experiment, influence different single diets (T, T+ Cg) bispecific diet (TCg) was studied, whereas, effects monospecific (T T+) (TCg T+Cg) in second experiment. The very rich triglycerides (TAG: 93–95% total neutral lipids), saturated FA (45%), monounsaturated (31–33%) acids (4.0–4.7 pg cell−1). Larval oyster survival growth rate positively correlated 18:1n-7 20:1n-7, storage lipids (SL), negatively related to 14:0, 18:1n-9, 20:1n-9, 20:4n-6 trans-22-dehydrocholesterol membrane (ML). Surprisingly, only essential 20:5n-3 SL larval survival. Correlations suggest that physiological disruption by overabundance TAG, FFA certain fed largely responsible for poor performance these larvae. 'High-lipid' strains microalgae, without regard qualitative do not always improve bivalve performance.