Effects of total replacement of fish oil by vegetable oils on n-3 and n-6 polyunsaturated fatty acid desaturation and elongation in sharpsnout seabream (Diplodus puntazzo) hepatocytes and enterocytes

Almaida-Pagán, P.F.; Hernández, Marta; Garcı́a, Benjamı́n Garcı́a; Madrid, Juan Antonio; Costa, Jorge de Assis; Mendiola, P.

doi:10.1016/j.aquaculture.2007.08.017

Cited by 33 publications

(27 citation statements)

References 42 publications

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“…In agreement with other similar studies performed with enterocytes and hepatocytes from fish fed VOs, cell viability was high (Rodríguez et al, 2002;Almaida-Pagán et al, 2007). Cell oxygen consumption was neither affected by diet showing values that were in the range previously reported for gilthead seabream enterocytes (Dópido et al, 2004).…”

Section: Discussionsupporting

confidence: 92%

“…There was also a trend for DHA and EPA to decrease but not in a significant way. In many other trials, fish fed VOs displayed significant reductions in n-3HUFA together with increased C 18 fatty acids in liver (Rodríguez et al, 2002;Menoyo et al, 2004;Mourente et al, 2005;Bell et al, 2006;Almaida-Pagán et al, 2007) and enterocytes Mourente et al, 2005;Almaida-Pagán et al, 2007) of different marine fish. Nevertheless, in seabass fed a balanced blend of VOs, enterocytes were capable at regulating fatty acid levels, with C 18 fatty acids not increasing greatly, and EPA and DHA levels relatively maintained (Mourente et al, 2005).…”

Section: Discussionmentioning

confidence: 92%

“…The most abundant C 18 fatty acids of VOs are LA, LNA and 18:1n-9, which were increased in enterocytes and hepatocytes of seabass, sharpsnout seabream and turbot fed VOs (Rodríguez et al, 2002;Mourente et al, 2005;Almaida-Pagán et al, 2007). Nevertheless, with EO other C 18 PUFA, including GLA (18:3n-6) and SDA (18:4n-3) increased in liver and muscle of freshwater and marine fish Miller et al, 2008;Díaz-López et al, 2009), and also in enterocytes and hepatocytes in the present trial.…”

Section: Discussionmentioning

confidence: 99%

“…Much information of the biosynthetic pathways of HUFA synthesis and other aspects of fatty acid metabolism has been obtained by incubating isolated fish cells with radiolabeled fatty acids (Bell et al, 2001Rodríguez et al, 2002;Tocher et al, , 2004Mourente et al, 2005;Fonseca-Madrigal et al, 2006;Almaida-Pagán et al, 2007). Therefore, the aim of the present study was to evaluate the effects of 50% substitution of dietary FO by EO, in gilthead seabream lipid profile and fatty acid metabolism in isolated hepatocytes and enterocytes.…”

Section: Introductionmentioning

confidence: 96%

“…In this sense, there are several studies demonstrating that dietary VOs induce the conversion of LA to ARA, and LNA to EPA and DHA in both hepatocytes and enterocytes in salmonids, although total n-3 HUFA levels are still significantly decreased in flesh and liver (Bell et al, 2001Tocher et al, , 2004Fonseca-Madrigal et al, 2006). However, HUFA synthesis is very low and generally not increased by dietary VOs in marine fish (Mourente et al, 2005;Almaida-Pagán et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Effects of dietary fish oil substitution by Echium oil on enterocyte and hepatocyte lipid metabolism of gilthead seabream (Sparus aurata L.)

Díaz-López

Pérez

Acosta

et al. 2010

Comparative Biochemistry and Physiology Part B: Biochemistry an

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The fatty acid profile of vegetable oils (VOs), together with the poor ability of marine fish to convert polyunsaturated fatty acids (PUFA) to highly unsaturated fatty acids (HUFA), lead to important changes in the nutritional value of farmed fish fed VO, which include increased fat and 18:2n-6 and reduced n-3 HUFA. Echium oil (EO) has a good n-3/n-6 balance as well as an interesting profile with its high content of unusual fatty acids (SDA, was also unaffected by EO in terms of total uptake, incorporation, β-oxidation and elongationdesaturation activities.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of dietary fish oil substitution by Echium oil on enterocyte and hepatocyte lipid metabolism of gilthead seabream (Sparus aurata L.)

Díaz-López

Pérez

Acosta

et al. 2010

Comparative Biochemistry and Physiology Part B: Biochemistry an

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Beef tallow as an alternative to fish oil in diets for gilthead sea bream (Sparus aurata) juveniles: Effects on fish performance, tissue fatty acid composition, health and flesh nutritional value

Pérez¹,

Rodrı́guez²,

Bolaños³

et al. 2014

Euro J Lipid Sci & Tech

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Gilthead sea bream juveniles of 135 g average body weight were fed for 120 days a fish oil-based commercial diet (CTRL) or one of two experimental isonitrogenous and isolipidic low fat (LF) fish mealbased diets differing only by the lipid source, in order to evaluate the efficacy of beef tallow (BT) as an ingredient in aquafeeds. Both experimental feeds were formulated with 60 g/kg of BT; the LFBTFO diet also contained 35 g/kg of fish oil (FO) whereas a blend of BT and vegetable oils (VO) completely replaced FO in the LFBTVO diet. No differences in growth and feed efficiency were found between fish fed the LFBTFO diet and the CTRL group whereas fish fed the diet devoid of FO (LFBTVO) presented the poorest growth indicators and the lowest feed and protein efficiencies. The use of LF feeds contributed to maintain the hepatosomatic index and the proportion of triacylglycerols (TAG) in muscle and brain in spite of the dietary replacement of FO. Flesh from fish fed the LFBTFO diet supplied the same absolute amount of EPA þ DHA than that of fish fed the CTRL diet, whereas a reduction of approximately 45% was registered when fish were deprived of FO.Practical applications: High proportions of BT can effectively be used as a valuable alternative to partially substitute FO in diets for gilthead sea bream juveniles without significantly affecting fish performance and health while promoting a limited impact on its health benefits for human consumption. The decline in the inclusion of marine ingredients in aquafeeds could actively contribute to the sustainability and profitability of the marine aquaculture industry.

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Econometric model of viability/profitability of ongrowing sharp snout sea bream (Diplodus puntazzo) in sea cages

García¹,

García²

2010

Aquacult Int

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We have designed and evaluated an ongrowing plant in sea cages as representative of Spanish Mediterranean exploitations with an annual production of 1,000 tonnes, based on the technology already in use for Sparus aurata ongrowing but taking into consideration the zootechnical variables for this species. We used the cost analysis and once defined the accounting structure, and we have used mathematical modelling or econometric to establish indicators of viability/profitability (NPV/IRR) based on the variables chosen for their economic importance in the sensitivity analysis. The highest costs and therefore of greatest economic importance are feed (43.85%) and juveniles (25.04%). The costs analysis points to a profitable business activity, but with a relatively low profitability (benefit/total cost = 7.26%) although benefit/investment is slightly better (15.29%). The break even point suggests that the business will only be viable above a selling price of € 3.69/kg and a production minimum of 709,363 kg/year. The feeding price threshold indicates that the activity is viable up to a cost of € 1.85/kg, which is within the range of sensitivity, while the cost of juvenile threshold (€ 1.17/kg) is much above this range. This underlines the great sensitivity of the activity to feeding costs, although the cost of the juveniles is not so important in this respect. When significant production levels have been reached, it is feasible that the cost of feeding will decrease since the species uses protein of vegetal origin efficiently, especially soy flour. If the minimum selling price is fixed at € 4.21/kg, the cost of feed is 11% lower and the IRR will reach 13.12%, which is an attractive alternative for investors. The econometric model is therefore a very useful tool for evaluating the viability or profitability of new species.

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Effects of total replacement of fish oil by vegetable oils on n-3 and n-6 polyunsaturated fatty acid desaturation and elongation in sharpsnout seabream (Diplodus puntazzo) hepatocytes and enterocytes

Cited by 33 publications

References 42 publications

Effects of dietary fish oil substitution by Echium oil on enterocyte and hepatocyte lipid metabolism of gilthead seabream (Sparus aurata L.)

Effects of dietary fish oil substitution by Echium oil on enterocyte and hepatocyte lipid metabolism of gilthead seabream (Sparus aurata L.)

Beef tallow as an alternative to fish oil in diets for gilthead sea bream (Sparus aurata) juveniles: Effects on fish performance, tissue fatty acid composition, health and flesh nutritional value

Econometric model of viability/profitability of ongrowing sharp snout sea bream (Diplodus puntazzo) in sea cages

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