Total replacement of fish oil by soybean or linseed oil with a return to fish oil in Turbot (Psetta maxima)

Regost, Christelle; Arzel, Jacqueline; Cardinal, Mireille; Rosenlund, Grethe; Kaushik, Sadasivam

doi:10.1016/s0044-8486(02)00655-5

Cited by 191 publications

(247 citation statements)

References 24 publications

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“…Steffens (1997) cites various studies that report n-3 and n-6 proportions in fish lipids in which n-3s are more than n-6s but all fish tested are either zooplanktivorous or piscivorous. Similar results are reported by Regost et al (2003) working with turbot Psetta maxima. However, rabbitfish is a macro-algaevore and thus does not benefit from the bioaccumulation of HUFAs as do organisms of a higher trophic level.…”

Section: Resultssupporting

confidence: 89%

The Effect of Linseed Oil and Kelp Meal in Diets on Fatty Acid Profile of Rabbitfish Siganus Rivulatus

Saoud

Ghanawi²,

Lebbos³

et al. 2010

Mediterranean Aquaculture Journal

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Marine fish are an excellent source of dietary protein and omega-3 highly unsaturated fatty acids (n-3 HUFA). Various researchers claim that wild caught fish are healthier to consume than aquacultured fish. The assumption is that the diet of the wild fish is healthier and that translates to humans consuming the fish. The spinefoot rabbit fish is an herbivorous marine fish with a healthy fatty acid profile. Because diet can significantly influence the fatty acid profile of fish, we tested the effect of dietary non-marine lipids on rabbitfish proximate composition and fatty acid profile. Spinefoot rabbitfish juveniles were maintained in 50L glass tanks connected to a recirculating system. Fish were offered one of four dietary treatments with three replicate tanks per treatment. Three feeds were formulated to contain lipids with various fatty acid profiles. One diet was formulated with fish oil (Rich in EPA and DHA), one with linseed oil (Rich in alpha linolenic acid, ALA) and the third with linseed oil supplemented with DHA. Additionally, a commercial feed was tested as a reference and all results were compared to those of fish from another experiment that were reared using a high protein and lipid commercial diet. Results show that flesh of wild rabbitfish does not contain significantly more EPA and DHA than flesh of fish offered diets rich in ALA. Flesh of rabbitfish that consumed EPA and DHA in their diets contained significantly more of these two n-3 HUFA than flesh of wild fish. The present study demonstrates that consumption of aquacultured rabbitfish is as beneficial as, if not more beneficial than consumption of wild caught fish.

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Section: Resultssupporting

confidence: 89%

The Effect of Linseed Oil and Kelp Meal in Diets on Fatty Acid Profile of Rabbitfish Siganus Rivulatus

Saoud

Ghanawi²,

Lebbos³

et al. 2010

Mediterranean Aquaculture Journal

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show abstract

“…The use of vegetable oils did no affect flesh quality in terms of fillet texture and organoleptic qualities, as described for other species such as Atlantic salmon (Hardy et al, 1987;Bjerkeng et al, 1997), differing from those results found by Regost et al (2003b) who described a more potato (earthy) odour and less flesh moisture of fish fed soybean oil containing diet when compared with fish fed 100% FO. However, it is difficult to compare these results among different species and different countries, since preferences for specific odour or flavour varies due to species and cultural reasons.…”

Section: Discussioncontrasting

confidence: 85%

Growth, feed utilization and flesh quality of European sea bass (Dicentrarchus labrax) fed diets containing vegetable oils: A time-course study on the effect of a re-feeding period with a 100% fish oil diet

Montero¹,

Robaina²,

Caballero³

et al. 2005

Aquaculture

227

157

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In the present study 75 g European sea bass were fed for 8 months with different diets (22% dietary lipid content) containing vegetable oils at two inclusion levels. The control diet (Diet FO) contained anchovy oil as the only lipid source; in diets 60RO, 60LO, and 60SO of fish oil was substituted by rapeseed, linseed or soybean oils, respectively; finally, in diet 80LO, 80% of the fish oil was substituted by linseed oil. Fish were fed to apparent satiation three times a day. All fish were individually weighed once per month. Lipid and fatty acid composition of diets and fish fillets were determined at the beginning, middle and end of the experimental period. Once the commercial size was reached, all fish were fed a 100% FO containing diet during 150 days.No significant differences were found in feed intake. Fish fed the diets containing 80% linseed oil or 60% rapeseed oil had significant ( P b 0.05) lower growth. Flesh fatty acid composition of total lipids reflected the fatty acids in the diets. Flesh contents of n-3 HUFA were reduced to about 45% in fish fed diets 60RO, 60LO or 60SO and to about 50% in diet 80LO. This reduction was markedly higher for EPA than for DHA. High levels of oleic, linoleic and linolenic acids were found in fish fed RO, SO and LO respectively.After 150 days of re-feeding period with a 100% fish oil diet, DHA levels were restored in those fish previously fed diets containing vegetable oils, but EPA levels remained lower when compared with fish fed 100% FO diet. Flesh content of linoleic and linolenic acids remained higher in those fish previously fed soybean and linseed oil containing diets, respectively.

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“…Consequently, tissue fatty acid compositions in fish fed vegetable oils are characterised by increased levels of C 18 PUFA and decreased levels of C 20/22 HUFA, compromising their nutritional value to the human consumer (Tocher et al, 2000;Bell et al, 2001bBell et al, , 2002Caballero et al, 2002;Izquierdo et al, 4 2003; Regost et al, 2003). Our primary hypothesis is that understanding the molecular basis of HUFA biosynthesis and its regulation in fish will enable us to manipulate and optimise the activity of the pathway to enable efficient and effective use of vegetable oils in aquaculture.…”

Section: Introductionmentioning

confidence: 99%

Characterization and comparison of fatty acyl Δ6 desaturase cDNAs from freshwater and marine teleost fish species

Zheng

Seiliez

Hastings

et al. 2004

Comparative Biochemistry and Physiology Part B: Biochemistry an

173

139

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Abstract:Fish are the most important dietary source of the n-3 highly unsaturated fatty acids (HUFA), eicosapentaenoic (EPA) and docosahexaenoic acid (DHA), that have particularly important roles in human nutrition reflecting their roles in critical physiological processes. The objective of the study described here was to clone, functionally characterise and compare expressed fatty acid desaturase genes involved in the production of EPA and DHA in freshwater and marine teleost fish species.Putative fatty acid desaturase cDNAs were isolated and cloned from common carp (Cyprinus carpio) and turbot (Psetta maximus). The enzymic activities of the products of these cDNAs, together with those of cDNAs previously cloned from rainbow trout (Oncorhynchus mykiss) and gilthead seabream (Sparus aurata), were determined by heterologous expression in the yeast containing the haem-binding motif, HPGG. Functional expression showed all four fish cDNAs encode basically unifunctional Δ6 fatty acid desaturase enzymes responsible for the first and ratelimiting step in the biosynthesis of HUFA from 18:3n-3 and 18:2n-6. All the fish desaturases were more active towards the n-3 substrate with 59.5%, 31.5%, 23.1% and 7.0% of 18:3n-3 being converted to 18:4n-3 in the case of turbot, trout, seabream and carp, respectively. The enzymes also showed very low, probably physiologically insignificant, levels of Δ5 desaturase activity, but none of the products showed Δ4 desaturase activity. The cloning and characterisation of desaturases from these fish is an important advance, as they are species in which there is a relative wealth of data on the nutritional regulation of fatty acid desaturation and HUFA synthesis, and between which substantive differences occur.

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Total replacement of fish oil by soybean or linseed oil with a return to fish oil in Turbot (Psetta maxima)

Cited by 191 publications

References 24 publications

The Effect of Linseed Oil and Kelp Meal in Diets on Fatty Acid Profile of Rabbitfish Siganus Rivulatus

The Effect of Linseed Oil and Kelp Meal in Diets on Fatty Acid Profile of Rabbitfish Siganus Rivulatus

Growth, feed utilization and flesh quality of European sea bass (Dicentrarchus labrax) fed diets containing vegetable oils: A time-course study on the effect of a re-feeding period with a 100% fish oil diet

Characterization and comparison of fatty acyl Δ6 desaturase cDNAs from freshwater and marine teleost fish species

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