2021
DOI: 10.1016/j.aquaculture.2020.736073
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Hepatic biochemical, morphological and molecular effects of feeding microalgae and poultry oils to gilthead sea bream (Sparus aurata)

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Cited by 19 publications
(8 citation statements)
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“…This could explain the pattern here obtained for P40 fish, since the α-linolenic acid relative abundance in feed was the lowest among all the other experimental diets. Although marine fish exhibit a limited elongase and desaturase activities [57], a recent study showed that diets low in n-3 PUFA up-regulated the gene expression of desaturase and elongase in Sparus aurata [66], thus supporting the present findings about FA profile of the fish fed diets totally deprived of fish meal. Finally, García-Romero et al [67] recorded the reduction in EPA in the fillet of fish fed a diet that included up to 10% of Procambarus clarkii meal, while the concentration of DHA in muscle tissue remained above the value contained in the diet, triggering the Pagrus pagrus preference to use EPA for energy purposes while DHA was selectively deposited, as shown in the present study.…”
Section: Discussionsupporting
confidence: 88%
“…This could explain the pattern here obtained for P40 fish, since the α-linolenic acid relative abundance in feed was the lowest among all the other experimental diets. Although marine fish exhibit a limited elongase and desaturase activities [57], a recent study showed that diets low in n-3 PUFA up-regulated the gene expression of desaturase and elongase in Sparus aurata [66], thus supporting the present findings about FA profile of the fish fed diets totally deprived of fish meal. Finally, García-Romero et al [67] recorded the reduction in EPA in the fillet of fish fed a diet that included up to 10% of Procambarus clarkii meal, while the concentration of DHA in muscle tissue remained above the value contained in the diet, triggering the Pagrus pagrus preference to use EPA for energy purposes while DHA was selectively deposited, as shown in the present study.…”
Section: Discussionsupporting
confidence: 88%
“…Although fads2 gene overexpression was shown to be correlated with an increase in FADS2 enzymatic activity in anadromous fish such as salmon fed with VO diets (Zheng et al, 2004(Zheng et al, , 2005, this is less straightforward and the results are controversial in marine fish. Previous studies, indeed, have shown that the partial or total substitution of FO with VO did not increase hepatic desaturase activity in sea bass (Geay et al, 2010), whereas a 6-desaturase increased activity in response to a deficiency in essential fatty acids has been suggested in gilthead sea bream (Sparus aurata) (Houston et al, 2017;Carvalho et al, 2021) as well as in meager (Argyrosomus regiu) (Carvalho et al, 2018). In these species, high retention of C 18:2n-6 and C 18:3n-6 and of chain-elongation products of LA and ALA, namely, C 20:2n-6 and C 20:3n-3, suggested that these PUFAs are endogenously synthesized through 6-desaturases and Elovl5 (fatty acid elongase 5), respectively.…”
Section: Discussionmentioning
confidence: 96%
“…Nevertheless, the quantity of HPB and SFE added to the diet was not to determine the significant modification of the fillet's fatty acid profile. Nor EPA or DHA, two fatty acids having a very important structural and functional roles in fish metabolism [89], were significantly modified by the treatment. However, the content of C18:3n-3, the fatty acid precursor of EPA and DHA, found higher in the E1 group compared to the other diets, could deserve further investigations to better understand the interaction between HBP and the expression of genes involved in lipid metabolism.…”
Section: Discussionmentioning
confidence: 96%