Background:The broodstock diet, and in particular the lipid and fatty acid composition of the diet, is known to play a key role in reproductive efficiency and survival of the progeny in fish. A major problem when replacing both fish meal and fish oil by plant sources is the lack of n-3 long chain polyunsaturated fatty acids, such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). To address this problem, we studied the effect of the plant-based diet supplemented with Schizochytrium sp. microalgae, source of DHA, compared to a conventional commercial diet rich in fish meal and fish oil on reproductive performance and egg quality and the consequences on progeny, in female rainbow trout broodstock. Results:The results demonstrated that DHA-rich microalgae supplementation in a plant-based diet allowed for the maintenance of reproductive performance and egg quality comparable to a conventional commercial feed rich in fish meal and fish oil and led to an increased significant fry survival after resorption. Moreover, when females were fed a plant-based diet supplemented with micro-algae, the 4-month-old progenies showed a significant higher growth when they were challenged with a similar diet as broodstock during 1 month. We provide evidence for metabolic programming in which the maternal dietary induced significant protracted effects on lipid metabolism of progeny. Conclusions:The present study demonstrates that supplementation of a plant-based diet with DHA-rich microalgae can be an effective alternative to fish meal and fish oil in rainbow trout broodstock aquafeed.

Emilie Cardona;Emilien Segret;Yoann Cachelou;Thibaut Vanderesse;Laurence Larroquet;Alexandre Hermann;Anne Surget;Geneviève Corraze;Frederic Cachelou;Julien Bobe;Sandrine Skiba-Cassy

INRAE,Univ.Pau&Pays Adour,E2S UPPA,NuMéA,F-64310,Saint Pée-sur-Nivelle,France;INRAE,UR1037 Fish Physiology and Genomic laboratory,F-35000 Rennes,France;Viviers de Sarrance,F-64490,Sarrance,France;Viviers de Rébénacq,F-64260,Rébénacq,France

畜牧与生物技术杂志（英文版）

[1]Emilie Cardona;Emilien Segret;Yoann Cachelou;Thibaut Vanderesse;Laurence Larroquet;Alexandre Hermann;Anne Surget;Geneviève Corraze;Frederic Cachelou;Julien Bobe;Sandrine Skiba-Cassy-.Effect of micro-algae Schizochytrium sp. supplementation in plant diet on reproduction of female rainbow trout (Oncorhynchus mykiss):maternal programming impact of progeny)[J].畜牧与生物技术杂志（英文版）,2022(04):1175-1192

broodstock,fry,aquafeed

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