Growth, digestibility and nutrient utilization of rainbow trout (Oncorhynchus mykiss) and European sea bass (Dicentrarchus labrax) juveniles fed different dietary soybean oil levels

Martins, Dulce Alves; Gomes, E.; Rema, Paulo; Dias, Jorge; Ozório, Rodrigo O. A.; Valente, Luísa

doi:10.1007/s10499-005-9034-x

Cited by 24 publications

(20 citation statements)

References 25 publications

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“…Both total fat and total fatty acid ADC of the different experimental diets were high (90.5-96.7%), which is in accordance with authors reporting similar results with diets including rapeseed as a FO replacer in rainbow trout (Caballero et al, 2002;Martins et al, 2006;Turchini et al, 2013). This replacement could even increase lipid digestibility at low water temperatures in salmonid species (Caballero et al, 2002;Karalazos et al, 2007).…”

Section: Discussionsupporting

confidence: 89%

Acid and re-esterified rapeseed oils as alternative vegetable oils for rainbow trout diets: Effects on lipid digestibility and growth

et al. 2016

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The present study aimed at evaluating the effects of dietary acid and re-esterified rapeseed oils as alternatives to native vegetable oils (VO) on growth performance and feed utilization in rainbow trout. Acid oils are a free fatty acid (FFA)-rich by-product from the refining of VO and re-esterified oils are the final product of a chemical esterification process between acid oils and glycerol. Because re-esterified oils have a high content of mono-and diacylglycerols (MAG and DAG), known for being good emulsifiers, a higher nutritive value than that of the native and the acid oils might be expected. A 72-day feeding trial where triplicate groups of rainbow trout were fed eight experimental diets formulated to contain 15% of a native, a re-esterified and an acid rapeseed oil, in addition to a 5% of fish oil (FO), was carried out. Diets with the native or the re-esterified oils blended with the acid oil were also studied. A commercial fish oil was used for the control diet. Fish fed rapeseed acid and re-esterified oil diets (RA and RE, respectively) showed high fat and total fatty acid apparent digestibility coefficients (ADC) (RA: 90.5 ± 0.3%, RE: 92.5 ± 1.0% for total fat and RA: 95.7 ± 0.1%, RE: 95.8 ± 0.2% for total fatty acids). However, the lowest total fatty acid ADC was that obtained in animals fed RA, which was significantly lower (P b 0.05) than that of fish fed the rapeseed native oil diet (RN: 96.7 ± 0.1%). No significant differences in final weight were obtained between fish fed RA (375.9 ± 2.9 g) and RE (381.5 ± 11.1 g) and those fed RN (393.7 ± 6.1 g), even though both values were significantly lower (P b 0.05) than that of fish fed the control diet (411.1 ± 3.3 g). Nonetheless, fish fed diets including blends of the rapeseed acid and the re-esterified oils (RE/RA and RA/RE) had higher final weights (392.8 ± 4.4 and 394.6 ± 1.6, respectively) than those of RA and RE, although differences were not statistically significant. Furthermore, RA and RE diets did not produce relevant changes in plasma parameters or in the morphology of liver and intestine of fish. Therefore, the inclusion of rapeseed acid and re-esterified oils along with a 5% of FO in aqua feeds does not seem to have negative effects on fat and fatty acid digestibility, growth, plasma parameter or morphology of liver and intestine in rainbow trout. However, before recommending their use, further studies regarding their effects on the final composition and quality of fillets should be carried out. Statement of relevance: Re-esterified and acid rapeseed oils could be included in diets for rainbow trout as economically advantageous sources with no negative results in fat and fatty acid digestibility, plasma parameters and morphology of liver and intestine.

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Section: Discussionsupporting

confidence: 89%

Acid and re-esterified rapeseed oils as alternative vegetable oils for rainbow trout diets: Effects on lipid digestibility and growth

et al. 2016

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“…In spite of total vegetable oil replacement, this adequate fish meal content of the feeds of vegetable oil groups were effective on growth and feed utilization. Similar results were reported with fishmeal-based diets for red sea bream (Huang et al, 2007), sea bream Montero et al, 2003;Izquierdo et al, 2005;Wassef et al, 2009;Wassef et al, 2014), European sea bass Martins et al, 2006;Eroldoğan et al, 2012;Yılmaz and Eroldoğan, 2015) and sharpsnout seabream (Piedecausa et al, 2007).…”

Section: Discussionsupporting

confidence: 81%

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Taşbozan¹,

Emre²,

Gökçe³

et al. 2015

Turk. J. Fish. Aquat. Sci.

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“…The resulting histological and morphological modifications of the gut tissues and intestinal epithelia can be responsible for altered digestion and absorption capabilities (Caballero et al. 2002, 2003; Martins et al. 2006).…”

Section: The Effects Of Fish Oil Replacement On Feed Qualitymentioning

confidence: 99%

Fish oil replacement in finfish nutrition

Turchini

Torstensen

2009

Reviews in Aquaculture

1,023

888

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Unsustainable fishing practices have placed a heavy emphasis on aquaculture to meet the global shortfalls in the supply of fish and seafood, which are commonly accepted as the primary source of health‐promoting essential omega‐3 (n‐3 highly unsaturated fatty acids). However, dietary fish oil is required for the production of omega‐3‐rich farmed fish and this commodity, in a vicious circle, is at present derived solely from wild fisheries. Decreasing global availability coupled with the highly variable price of this resource has forced the aquaculture industry to investigate the possibilities of alternative dietary lipid sources. This review attempts to compile all principal information available regarding the effects of fish oil replacement for the diets of farmed finfish, analysing the findings using a comparative approach among different cultured fish species. The review initially focuses on the present situation with regard to the production, availability and main nutritional characteristics of fish oil and the principal alternative lipid sources (such as vegetable oils and animal fats). Following this, the effects of fish oil replacement in finfish nutrition on feed quality, fish performance, feed efficiency, fish lipid metabolism, final eating quality and related economic aspects are presented and discussed.

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Growth, digestibility and nutrient utilization of rainbow trout (Oncorhynchus mykiss) and European sea bass (Dicentrarchus labrax) juveniles fed different dietary soybean oil levels

Cited by 24 publications

References 25 publications

Acid and re-esterified rapeseed oils as alternative vegetable oils for rainbow trout diets: Effects on lipid digestibility and growth

Acid and re-esterified rapeseed oils as alternative vegetable oils for rainbow trout diets: Effects on lipid digestibility and growth

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Fish oil replacement in finfish nutrition

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