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Publication d’un article pour Maria Angelica Martinez-Silva

Maria Angelica Martinez-Silva, ISMER

Supervision : Réjean Tremblay (ISMER), Céline Audet (ISMER), Gesche Winkler (ISMER)

Voici le titre et le résumé de l'article publié par Maria Angelica Martinez-Silva dans le journal Aquaculture and Fisheries :

Prey quality impact on the feeding behavior and lipid composition of winter flounder (Pseudopleuronectes americanus) larvae

Maria Angelica Martinez-Silva1, Céline Audet1, Gesche Winkler1 et Réjean Tremblay1

1Institut des Sciences de la Mer, Université du Québec à Rimouski, Québec, Canada

Aquaculture and Fisheries, 3 : 145-155, https://doi.org/10.1016/j.aaf.2018.06.003

Copepods are the main natural food of many marine fish larvae. However, enriched rotifers are the mostcommonly used live prey in larval rearing. Impacts on the feeding behavior, growth, survival, and fattyacid (FA) composition of winter flounder larvae fed with copepods and rotifers were determined andcompared to the FA composition of the two live prey. Nauplii of Eurytemora spp. and Acartia sp., two ofthe main species of copepods present in the St. Lawrence estuary, showed no significant differences intheir essential fatty acid profiles, suggesting similar nutritional quality. Thus, only Eurytemora herdmaniwas compared to enriched rotifers in this study. Copepod nauplii were characterized by higher levels ofessential fatty acids, particularly docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA). The se-lective incorporation of essential fatty acids from diets in larval tissues (polar lipids) indicated thatnauplii might better fulfill larval nutritional requirements for DHA than rotifers. Furthermore, larvalbehavior was modified according to the diet: larvae fed with nauplii spent more time swimming with nochanges in the occurrence of hunting events.