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Effects of full replacement of dietary fishmeal with insect meal from Tenebrio molitor on rainbow trout gut and skin microbiota

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Journal of Animal Science and Biotechnology 2021年第3期12卷 1042-1055页

作者： Genciana Terova Elisabetta Gini Laura Gasco Federico Moroni micaela antonini Simona Rimoldi Department of Biotechnology and Life Sciences University of InsubriaVia J.H.Dunant321100 VareseItaly Department of Agricultural Forest and Food SciencesUniversity of TurinLargo P.Braccini 2-10095 GrugliascoTorinoItaly

Background:Aquaculture must continue to reduce dependence on fishmeal(FM)and fishoil in feeds to ensure sustainable sector ***,the use of novel aquaculture feed ingredients is *** this regard,insects can represent a new world of sustainable and protein-rich ingredients for farmed fish ***,we investigated the effects of full replacement of FM with Tenebrio molitor(TM)larvae meal in the diet of rainbow trout(Oncorhynchus mykiss)on fish gut and skin ***:A feeding trial was conducted with 126 trout of about 80 g mean initial weight that were fed for 22 weeks with two isonitrogenous,isolipidic,and isoenergetic extruded experimental *** defatted TM meal was included in one of the diets to replace 100%(TM 100)of FM,whereas the other diet(TM 0)was without *** analyse the microbial communities,the Illumina MiSeq platform for sequencing of 16S rRNA gene and Qiime pipeline were used to identify bacteria in the gut and skin mucosa,and in the ***:The data showed no major effects of full FM substitution with TM meal on bacterial species richness and diversity in both,gut mucosa-and skin mucus-associated *** microbiome was dominated by phylum Proteobacteria and especially by Gammaproteobacteria class that constituted approximately half of the bacterial taxa *** two dietary fish groups did not display distinctive features,except for a decrease in the relative abundance of Deefgea genus(family Neisseriaceae)in trout fed with insect *** metagenomic analysis of the gut mucosa indicated that Tenericutes was the most abundant phylum,regardless of the ***,within this phylum,the Mollicutes,mainly represented by Mycoplasmataceae family,were the dominant ***,we observed only a weak dietary modulation of intestinal bacterial *** only changes due to full FM replacement with TM meal were a decreased number of Proteobacteria and a reduced number of taxa assigned to

关键词： Aquaculture Circular economy Gut microbiome Insect meal Metagenome Next-generation sequencing Rainbow trout Skin microbiome Tenebrio molitor

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