FN Archimer Export Format PT J TI Fatty acid composition in deep hydrothermal vent symbiotic bivalves. BT AF Ben-Mlih, F Marty, JC Fiala-Médioni, A AS 1:1;2:1;3:1; FF 1:;2:;3:; C1 Université P. M. Curie (Paris 6), France. C2 UNIV PARIS 06, FRANCE TC 0 UR https://archimer.ifremer.fr/doc/00667/77873/80020.pdf LA English DT Article CR HYDRONAUT BO Le Nadir DE ;bacterial endosymbionts associated with bivalve gills;relationships between bacteria and hosts;ecological conditions;species biochemistry;lipids;fatty acids;biomarkers AB Fatty acids in deep hydrothermal vent bivalves have been analyzed. Their composition is completely different from that of a littoral mussel collected in the Mediterranean sea. The distribution of fatty acids in the littoral mussel is characterized by a predominance of polyunsaturated fatty acids (20:5n-3, 22:6n-3) reflecting the planktonic origin of the food. Vent bivalve fatty acid distribution is dominated by an abundance of the monounsaturated acids (double bond in the n-7 position) 16:1n-7, 18:1n-7, and 20:1n-7 which are clearly of bacterial origin and give an indication of the symbiotic bacterial activity in the bivalves. Differences between the fatty acid composition of the bivalves from two hydrothermal sites (13 degrees N and Galapagos) and differences between the mantle and the gill were observed and are discussed with respect to vent activities at the two sites and species metabolic capacities as a function of ecological conditions. PY 1992 PD DEC SO Journal of Lipid Research SN 00222275 PU Elsevier BV VL 33 IS 12 BP 1797 EP 1806 DI 10.1016/S0022-2275(20)41337-9 ID 77873 ER EF