Effect of a mono-specific algal diet on immune functions in two bivalve species -Crassostrea gigasandRuditapes philippinarum

• DOI: 10.1242/jeb.00518
• Publication Date: 2003-07-23T17:29:21Z
• Authors: Maryse Delaporte; Philippe Soudant; Jeanne Moal; Christophe Lambert; Claudie Quéré; Philippe Miner; Gwénaëlle Choquet; Christine Paillard; Jean-François Sa...
• Keywords: Ruditapes; Isochrysis galbana; Haliotis discus; Pacific oyster; Tetraselmis suecica

SUMMARY The impact of diets upon the fatty acid composition haemocyte polar lipids and consequently immune parameters has been tested in oyster Crassostrea gigas clam Ruditapes philippinarum. Oysters clams were fed each three cultured algae: Chaetoceros calcitrans, which is rich 20:5(n-3) 20:4(n-6) poor 22:6(n-3) acids; T-Iso (Isochrysis sp.), deficient 20:4(n-6); Tetraselmis suecica, contains only small amounts 20:4(n-6). Fatty was greatly affected by diet. C. calcitrans maintained a higher proportion their lipids, while these polyunsaturated acids decreased drastically for animals T-Iso. However, diet both species. Higher 20:4(n-6)contents appeared to have positive effect total count, granulocyte percentage, phagocytic rate oxidative activity haemocytes. Similarly, on haemocytes observed but lesser extent than clams. Interestingly, when are submitted stressful condition,a dietary content noticed.