Effect of different plant oils on growth performance, fatty acid composition and flesh quality of rainbow trout (Oncorhynchus mykiss)

Abstract

This experiment intended to assess the effect of sesame (SO), sunflower (SFO) and linseed (LO) oils on growth performance, fatty acid composition of fillet and liver or flesh quality traits of rainbow trout. Fish fed different four iso-nitrogenous and iso-lipidic experimental feeds. The control feed contained only fish oil as the primary lipid source. The fillet eicosapentaenoic acid and docosahexaenoic acid levels were the highest in fish fed control feed. In contrast, the liver eicosapentaenoic acid level was the highest in fish fed LO feed. Fish fed SFO feed had the highest level of total nÀ6 fatty acids in fillet and liver. Fish fed SO feed had the highest level of 18:1 nÀ9 fatty acid in fillet and liver. During the 12 days refrigerated storage period at 1°C, thiobarbituric acid (TBA) and pH values gradually increased in all dietary groups. However, trimethylamin nitrogen (TMA-N) values increased in all dietary groups between days 0 and 9 during the storage period. Generally, pH value in fillets of control group was slightly higher than the other fish groups during 12 days refrigerated storage. Nevertheless, the chemical indicators of spoilage, TBA, TMA-N and pH values were in the limit of acceptability for human consumption. Results of growth performance and chemical tests in the present study showed that sesame, linseed and sunflower oils could be used in feeds for rainbow trout. Moreover, we concluded that further researches should be carried out on the partial replacement of fish oil by sesame oil in rainbow trout nutrition.

Fatty acid digestibility in gilthead sea bream fed diets containing native, re-esterified or acid vegetable oils

“…; Yildiz et al . ). As extensively reported, certain vegetable oils (VO) are considered good alternatives to FO in diets for salmonids and freshwater fish (Bell et al .…”

“…In view of the increasing global demand of fish oil (FO), its decreasing availability and its large use by the aquaculture industry (FAO, 2014) oils from vegetable origin have been widely studied as sustainable and economically valuable FO substitutes in aqua feeds (Bell et al 2001;Ng et al 2003;Turchini et al 2009;Yildiz et al 2014). As extensively reported, certain vegetable oils (VO) are considered good alternatives to FO in diets for salmonids and freshwater fish (Bell et al 2001;Caballero et al 2002;Fountoulaki et al 2009; Dernekbas ßı 2012).…”

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

“…This ingredient is thus progressively replaced by more sustainable alternative lipid sources in fish feed. In this context, plant-derived oils are considered as promising alternatives [ 18 ] and have already been included in commercial feeds without compromising fish growth performance [ 23 – 26 ]. Nevertheless, plant-derived oils do not contain n-3 LC-PUFA, which decreases the amount of EPA and DHA in the feeds and, consequently, the farmed fish, compromising their nutritional benefits to human consumers [ 18 , 23 – 26 ].…”

Effects of different dietary lipid sources on growth performance, antioxidant enzyme activities and biochemical composition of juvenile swimming crab, Portunus trituberculatus

“…Besides, PO contains a high proportion of palmitic acid (PA, 16:0) with considerable quantities of oleic and linoleic acids (Ng & Gibon, ). Many studies have indicated that FO replacement with VOs did not show any negative effects on growth performance, feed utilization and survival in fish, such as rainbow trout ( Oncorhynchus mykiss ) (Yildiz, Eroldoğan, Engin, Gulçubuk, & Baltaci, ; Yildiz, Kose, Issa, & Kahraman, ) and turbot ( Scophthalmus maximus L .) (Peng et al, ).…”