Replacement of fish oil with vegetable oil blends in feeds for greater amberjack (Seriola dumerili) juveniles: Effect on growth performance,feed efficiency,tissue fatty acid composition and flesh nutritional value |
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| Authors: | R Monge‐Ortiz A Tomás‐Vidal D Rodriguez‐Barreto S Martínez‐Llorens JA Pérez M Jover‐Cerdá A Lorenzo |
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| Affiliation: | 1. Research Group of Aquaculture and Biodiversity, Institute of Animal Science and Technology, Universitat Politècnica de València, Valencia, Spain;2. Departamento de Biología Animal, Edafología y Geología (U.D.I. Fisiología), Facultad de Ciencias, Sección Biología, Universidad de La Laguna, San Cristóbal de La Laguna, Spain |
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| Abstract: | This study was undertaken to assess the effects of fish oil (FO) substitution by a mixture of alternative vegetable oils (VO) on Seriola dumerili culture performance. A 154‐day feeding experiment was conducted using juveniles (39.2 ± 1.6 g average weight). Three isolipidic and isoenergetic meal‐based diets were formulated varying their lipid component. The control diet contained 100% FO (FO100), whereas diets VO50 and VO100 included 1/2 of oil blend and all the oil from blend of palm oil (PO) and linseed oil (LO) as substitute for FO, respectively. Dietary regime did not significantly affect growth performance, biometric indices, feed efficiency, plasma chemistry and liver and muscle lipid contents. Nonetheless, dietary VO inclusion impacted on the fatty acid profile of target tissues, especially in the liver. Fatty acid profiles of the fillets reflected those of the dietary oils except that there was apparent selective utilization of palmitic acid (C16:0) and oleic acid (C18:1n‐9) and apparent selective retention of long‐chain polyunsaturated fatty acids, especially eicosapentaenoic acid (EPA, C20:5n‐3) and docosahexaenoic acid (DHA, C22:6n‐3). The nutritional value and the potential ability to prevent the development of coronary heart diseases of the flesh lipid fraction decreased with gradual FO substitution. |
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| Keywords: | alternative oil sources fatty acid composition fish oil substitution greater amberjack linseed oil palm oil |
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