Effects of dietary iron supplementation on growth performance, fatty acid composition and fatty acid metabolism in rainbow trout (Oncorhynchus mykiss) fed vegetable oil based diets

Senadheera, Shyamalie D.; Turchini, Giovanni M.; Thanuthong, Thanongsak; Francis, David S.

doi:10.1016/j.aquaculture.2012.02.020

Cited by 27 publications

(9 citation statements)

References 41 publications

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“…Similarly, high concentrations of copper in the diet of Atlantic salmon ( Salmo salar ) juveniles (above 500 mg) correlated with a decrease in the body protein levels, while low concentrations of dietary copper (35 mg) were correlated with healthy levels of body protein (Berntssen et al., 1999). Additionally, different inclusion levels of dietary iron directly affected the biosynthesis and concentration of n‐3 PUFA fatty acids in rainbow trout (Senadheera et al., 2012).…”

Section: Discussionmentioning

confidence: 99%

Different levels of organic trace minerals in diets for Nile tilapia juveniles alter gut characteristics and body composition, but not growth

et al. 2020

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Thirty groups of twenty juveniles each of Nile tilapia (Oreochromis niloticus, initial average weight 23.93 ± 0.80 g) were fed diets containing increasing amounts (0%, 25%, 50%, 75%, and 100% of levels used by the tilapia feed industry) of organic trace mineral (Fe, Zn, Mn, Cu, Se) supplementation for 56 days. Growth was not affected by the dose of mineral supplementation. However, body protein increased in fish fed intermediate doses of organic minerals, reaching a maximum at 40.44% supplementation. Doses >50% showed mild damage to the intestinal tissue. Body Fe, Zn and Cu deposition were highest at 28.32%, 24.43% and 78.45% supplementation, respectively. Tilapia could modulate intestinal morphology when fed different doses of organic minerals. As the supplementation doses increased, hemosiderin staining increased in the distal intestine and total body Fe content, indicating that the distal region of the intestine plays an important role in iron excretion by tilapia. Supplementation of organic trace minerals at intermediate doses does not harm Nile tilapia growth, but excessive trace mineral supplementation can impair body protein retention and promote histological alterations in the gut.

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Section: Discussionmentioning

confidence: 99%

Different levels of organic trace minerals in diets for Nile tilapia juveniles alter gut characteristics and body composition, but not growth

et al. 2020

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“…More research is thus required on the replacement of fish oil by readily available, economically and environmentally sustainable lipid source alternatives in aquaculture feeds. In this context, studies on transgenic plants rich in EPA and DHA [ 65 ], finishing diets [ 18 , 23 , 24 ] or modulators [ 66 , 67 ] added to feed to improve fish lipid bioconversion capacity could be potential options.…”

Section: Discussionmentioning

confidence: 99%

Temperature Increase Negatively Affects the Fatty Acid Bioconversion Capacity of Rainbow Trout (Oncorhynchus mykiss) Fed a Linseed Oil-Based Diet

et al. 2016

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Aquaculture is meant to provide fish rich in omega-3 long chain polyunsaturated fatty acids (n-3 LC-PUFA). This objective must be reached despite (1) the necessity to replace the finite and limited fish oil in feed production and (2) the increased temperature of the supply water induced by the global warming. The objective of the present paper was to determine to what extent increased water temperature influences the fatty acid bioconversion capacity of rainbow trout (Oncorhynchus mykiss) fed a plant-derived diet. Fish were fed two diets formulated with fish oil (FO) or linseed oil (LO) as only added lipid source at the optimal water temperature of 15°C or at the increased water temperature of 19°C for 60 days. We observed that a temperature increase close to the upper limit of the species temperature tolerance range negatively affected the feed efficiency of rainbow trout fed LO despite a higher feed intake. The negative impact of increased water temperature on fatty acid bioconversion capacity appeared also to be quite clear considering the reduced expression of fatty acid desaturase 2 in liver and intestine and the reduced Δ6 desaturase enzymatic activity in intestinal microsomes. The present results also highlighted a negative impact of increased temperature on the apparent in vivo enzymatic activity of Δ5 and Δ6 desaturases of fish fed LO. Interestingly, this last parameter appeared less affected than those mentioned above. This study highlights that the increased temperature that rainbow trout may face due to global warming could reduce their fatty acid bioconversion capacity. The unavoidable replacement of finite fish oil by more sustainable, readily available and economically viable alternative lipid sources in aquaculture feeds should take this undeniable environmental issue on aquaculture productivity into account.

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“…It is known that in the absence of added n-3 LC PUFA, several fish species, including Atlantic salmon, have the capacity to endogenously produce 20:5n-3 and 22:6n-3 when provided 18:3n-3 as a substrate for in vivo bioconversion (Nakamura & Nara 2004;Tocher 2003). However, the extent of endogenous n-3 LC-PUFA production is limited and dependent on: i) both substrate (18:3n-3) and end-product (22:6n-3) availability; ii) on the physiological requirement for 22:6n-3, which itself is influenced by a number of factors including developmental stage and water temperature (Tocher et al 2003;Torstensen et al 2004;Turchini & Francis 2009;Turchini et al 2011b); and iii) on other external factors, such as, amongst others, dietary co-enzyme and co-factor availability (Giri et al 2016;Lewis et al 2013;Senadheera et al 2012b, a) and the presence of promoters or inhibitors (Pickova et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Altered levels of shorter vs long-chain omega-3 fatty acids in commercial diets for market-sized Atlantic salmon reared in seawater – Effects on fatty acid composition, metabolism and product quality

et al. 2019

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There is a growing trend of 'replacing' long-chain omega-3 polyunsaturated fatty acid (n-3 LC PUFA) rich oils with C18 shorter-chain omega-3 polyunsaturated fatty acid rich oils in Atlantic salmon aquafeed formulations. n-3 LC PUFA, including 20:5n-3 and 22:6n-3, play contrasting physiological roles and are metabolised differently in comparison to C18 PUFA. Accordingly, the present study recorded the effect of replacing n-3 LC PUFA rich dietary fish oil with C18 n-3 PUFA rich camelina oil at two inclusion levels in commercial-like diets fed to market-sized Atlantic salmon. This assessment was achieved by an analysis of industry relevant production parameters including growth performance, fatty acid composition and metabolism, nutrient digestibility and consumer preference (taste and sensorial analysis of fillet). The trial was conducted over the final 150 days of an on-farm grow-out period in seawater. The dietary replacement of n-3 LC PUFA with C18 n-3 PUFA resulted in a significant decrease in fillet n-3 LC PUFA and a poorer growth performance. However, in the absence of fish oil, the inclusion of camelina oil at high levels (40 %) contributed to an improved n-6/n-3 ratio and partially ameliorated low dietary n-3 LC PUFA by providing added substrate for endogenous n-3 LC PUFA synthesis in comparison to a 20% camelina oil inclusion. Furthermore, taste quality was largely unaffected by the dietary addition of camelina oil. Finally, this study provides evidence to suggest that a more complete reporting of the relative contribution of shorter-chain C18 n-3 PUFA and n-3 LC PUFA in fish and seafood products would benefit consumers from a nutritional quality standpoint.

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Effects of dietary iron supplementation on growth performance, fatty acid composition and fatty acid metabolism in rainbow trout (Oncorhynchus mykiss) fed vegetable oil based diets

Cited by 27 publications

References 41 publications

Different levels of organic trace minerals in diets for Nile tilapia juveniles alter gut characteristics and body composition, but not growth

Different levels of organic trace minerals in diets for Nile tilapia juveniles alter gut characteristics and body composition, but not growth

Temperature Increase Negatively Affects the Fatty Acid Bioconversion Capacity of Rainbow Trout (Oncorhynchus mykiss) Fed a Linseed Oil-Based Diet

Altered levels of shorter vs long-chain omega-3 fatty acids in commercial diets for market-sized Atlantic salmon reared in seawater – Effects on fatty acid composition, metabolism and product quality

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