Effects of dietary fish oil replacement by various vegetable oils on growth performance, body composition and fatty acid profile of juvenile Malaysian mahseer, Tor tambroides

Abstract

The current study was carried out to investigate the effects of replacing dietary fish oil with different vegetable oil sources and ratios on the growth performance and tissue fatty acid profiles of juvenile Tor tambroides. Three different vegetable oils (sunflower oil, linseed oil and palm oil) were used in two different substitution ratios (50% and 100%). A diet without replacement (100% fish oil) was used as a control. Triplicate groups of T. tambroides juveniles (5.0 ± 0.4 g) were fed the test diets for 9 weeks. The highest weight gain was observed in fish fed palm oil diets that, of course, were reared in aquaria. There was a significant effect (P < 0.05) of the percentage of fish oil replacement on the liver weight after controlling for the effect of fish weight (P < 0.05). The viscera weight significantly increased (P < 0.05) in fish on vegetable oil diets, and its highest amount observed among fish fed palm oil diets. Vegetable oil inclusion significantly reduced eicosapentaenoic acid and docosahexaenoic acid (DHA) concentrations in both muscle and liver of fish except for fish on 50% palm oil diet that had similar liver DHA content with those on control diet.

More Judicious Use of Fish Oil in Cobia Feeds: II. Effects of Graded Fish Oil Sparing and Finishing

“…Fish oil sparing rarely impacts fish production performance as long as essential fatty acid requirements are met (Turchini et al , 2011aGao et al 2011;Trushenski et al 2011aTrushenski et al , 2011bTrushenski et al , 2011cTrushenski et al , 2011dTrushenski et al , 2013aTrushenski et al , 2013bKamarudin et al 2012;Mulligan and Trushenski 2013;Ng et al 2013;Trushenski and Kanczuzewski 2013). Our results are consistent with this convention and with other research on fish oil sparing in Cobias (Trushenski et al 2011a(Trushenski et al , 2012(Trushenski et al , 2013bWoitel et al 2014).…”

Effects of Different Types of Oils on Growth Performance, Survival and Carcass Composition of Nile Tilapia (Oreochromis niloticus)

“…In contrast, studies have reported partial replacement (at least 50 % up to 80 %) of dietary fish oil by vegetable oil (Caballero et al, 2002). Vegetable oil inclusion significantly reduced EPA and DHA concentrations in both muscle and liver of fish juvenile Malaysian mahseer, Tor tambroides except for fish on 50% palm oil diet that had similar liver DHA content with those on control diet (fish oil) (Kamarudin et al, 2012). Mourente et al, (2005) found that 60% of fish oil could be replaced by rapeseed, linseed and olive oils without reduction on the growth rates in European sea bass Dicentrarchus labrax.…”

Seeds of sacha inchi (Plukenetia volubilis, Euphorbiaceae) as a feed ingredient for juvenile tambaqui, Colossoma macropomum, and matrinxã, Brycon amazonicus (Characidae)

“…Like other vertebrates, fish cannot produce linoleic (18:2 n-6) and linolenic acid (18:3 n-3) and therefore need to obtain these essential fatty acids from their diet, according to species-specific requirements (New 1987;Valenzuela et al 2014). Fish can convert 18-carbon PUFA into highly unsaturated fatty acids (HUFA) of the same omega 3 series, namely eicosapentanoic acid (EPA; 20:5 n-3) and docosaexanoic acid (DHA; 22:6 n-3) (Vargas et al 2008;Tanamati et al 2009;Kamarudin et al 2012). In human nutrition, HUFAs are associated with the prevention Table 2.…”