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Herein, the effect of dietary inclusion of insect ( Tenebrio molitor ) meal on hepatic pathways of apoptosis and autophagy in three farmed fish species, gilthead seabream ( Sparus aurata ), European seabass ( Dicentrarchus labrax ) and rainbow trout ( Oncorhynchus mykiss ), fed diets at 25%, 50% and 60% insect meal inclusion levels respectively, was investigated. Hepatic proteome was examined by liver protein profiles from the three fish species, obtained by two-dimensional gel electrophoresis. Although cellular stress was evident in the three teleost species following insect meal, inclusion by  T. molitor ,  D. labrax  and  O. mykiss  suppressed apoptosis through induction of hepatic autophagy, while in  S. aurata  both cellular procedures were activated. Protein abundance showed that a total of 30, 81 and 74 spots were altered significantly in seabream, European seabass and rainbow trout, respectively. Insect meal inclusion resulted in individual protein abundance changes, with less number of proteins altered in gilthead seabream compared to European seabass and rainbow trout. This is the first study demonstrating that insect meal in fish diets is causing changes in liver protein abundances. However, a species-specific response both in the above mentioned bioindicators, indicates the need to strategically manage fish meal replacement in fish diets per species.

Tenebrio molitor larvae meal inclusion affects hepatic proteome and apoptosis and/or autophagy of three farmed fish species