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Effect of micro-algae Schizochytrium sp.supplementation in plant diet on reproduction of female rainbow trout(Oncorhynchus mykiss):maternal programming impact of progeny

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Journal of Animal Science and Biotechnology 2022年第4期13卷 1175-1192页

作者： 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 AdourE2S UPPANuMéAF-64310Saint Pée-sur-NivelleFrance INRAE UR1037 Fish Physiology and Genomic laboratoryF-35000 RennesFrance Viviers de Sarrance F-64490SarranceFrance Viviers de Rébénacq F-64260RébénacqFrance.

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.

关键词： Egg quality Micro-algae Nutritional programming plant diet Rainbow trout Reproduction

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NITROGEN BUDGETS OF YOUNG GRASS CARP FED ON plant OR ANIMAL dietS

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Progress in Natural Science:Materials International 1991年第5期 466-469页

作者：崔奕波王少梅刘肖芳陈少莲 Academia Sinica Freshwater Ecology and Biotechnology Laboratory Institute of Hydrobiology PRC Wuhan 430072

Ⅰ.INTRODUCTIONGrass carp is an important cultured fish in China.There has been controversy onwhether the grass carp is a real herbivorous fish and can grow well on plant diets only.Some researchers argued that grass carp has very low growth rates when feeding on plantdiets only,and that this species is an omnivorous fish whose optimal diet should mclude alarger proportion of animal food.Other reports showed that even very small-sized grasscarp could achieve high growth rates when fed with appropriate macrophytes.

关键词： nitrogen budget animal diet plant diet Ctenopharyngodon idella

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