title: Fatty acid composition, sarcoplasmic reticular lipid oxidation, and immunity of hard clam (Meretrix lusoria) fed different dietary microalgae.
abstract: Fatty acid profiles, activities of biomembrane lipid peroxidation, and immunity of a seawater clam (Meretrix lusoria) fed three species of dietary microalgae were investigated. Clams of a marketable size (25 g mean weight) were fed Tetraselmis chui, Chaetoceros muelleri, or Isochrysis galbana for 8 weeks. Fatty acids, particularly eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), in the polar lipid fractions of clams reflected those of the dietary algae species. Clams fed with T. chui and C. muelleri contained higher proportion of non-methylene interrupted (NMI) fatty acids than those fed I. galbana. Proportion of DHA in lipids of the clams fed with I. galbana was the highest among test groups. The NADH-dependent sarcoplasmic reticular lipid peroxidation activity of clams fed I. galbana was significantly greater (p < 0.05) than that of clams fed T. chui or C. muelleri. The hemocyte adhesion capacity of clams fed C. muelleri or I. galbana was significantly higher (p < 0.05) than that of clams fed T. chui. No significant differences (p ≥ 0.05) in total hemocyte count, phenoloxidase activity, clearance efficiency hemocyte and phagocytosis were detected among clams fed different microalgae.
authors.affiliation: National Chiayi University, Department of Aquatic Biosciences, 300 University Road, Chiayi 60004, Taiwan.
authors.forename: Shu-Mei
authors.initials: SM
authors.lastname: Chen
authors.affiliation: National Chiayi University, Department of Aquatic Biosciences, 300 University Road, Chiayi 60004, Taiwan.
authors.forename: Kai-Yi
authors.initials: KY
authors.lastname: Tseng
authors.affiliation: National Chiayi University, Department of Aquatic Biosciences, 300 University Road, Chiayi 60004, Taiwan. Electronic address: chuhuang@mail.ncyu.edu.tw.
authors.forename: Chen-Huei
authors.initials: CH
authors.lastname: Huang
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000818:Animals; D049872:Bivalvia / Q000276:immunology* / Q000378:metabolism*; D004032:Diet; D005227:Fatty Acids / Q000032:analysis*; D007113:Immunity, Innate; D015227:Lipid Peroxidation; D058086:Microalgae / Q000737:chemistry*; D012519:Sarcoplasmic Reticulum / Q000378:metabolism
chemical_list: D005227:Fatty Acids
keywords: Clam; Fatty acid profile; Immunity; Lipid oxidation; Microalgae