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Replacement of fish oil with thraustochytrid Schizochytrium sp. L oil in Atlantic salmon parr (Salmo salar L) diets.
Comp Biochem Physiol A Mol Integr Physiol. 2007 Oct; 148(2):382-92.CB

Abstract

Replacing fish oil with that from a docosahexaenoic acid (22:6omega3, DHA) rich single cell micro-organism, thraustochytrid Schizochytrium sp. L, in diets for Atlantic salmon (Salmo salar) was investigated. Four experimental diets containing 100% thraustochytrid oil (TO), 100% palm oil (PO) and a 4:1 palm and thraustochytrid oil mixture (MX) were compared to a fish oil (FO) diet over 9 weeks. A saltwater transfer challenge occurred at the end of the trial for 14 days to test the diet treatments on the ability of salmon to smolt. There were no significant differences in the feed consumption of the diets or the digestibility of the omega3 or omega6 PUFA, indicating no differences in the digestibility of fatty acids between diets. No significant differences were noted between the growth of fish on the four diet treatments. Significant differences were noted in the fatty acid profiles of the fish muscle tissues between all diets. Fish on the TO diet had a significantly greater percentage of DHA in muscle tissue compared with fish on all other diets. Blood osmolarity, which is inversely related to the ability of salmon to smolt, from the TO and FO fed fish was significantly lower than that of fish on the PO diet. This study showed that thraustochytrid oil can be used to replace fish oil in Atlantic salmon diets without detriment to the growth of parr. Including thraustochytrid oil in fish diets significantly increases the amount of DHA in Atlantic salmon muscle and therefore is a candidate for use in oil blends for salmon diets. Thraustochytrid oil provides a renewable source of essential fatty acids, in particular DHA, for aquafeeds.

Authors+Show Affiliations

School of Aquaculture, Tasmanian Aquaculture and Fisheries Institute, University of Tasmania (UTAS), Locked Bag 1370, Launceston, Tasmania 7250, Australia. matthew.miller@utas.edu.auNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17588797

Citation

Miller, Matthew R., et al. "Replacement of Fish Oil With Thraustochytrid Schizochytrium Sp. L Oil in Atlantic Salmon Parr (Salmo Salar L) Diets." Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology, vol. 148, no. 2, 2007, pp. 382-92.
Miller MR, Nichols PD, Carter CG. Replacement of fish oil with thraustochytrid Schizochytrium sp. L oil in Atlantic salmon parr (Salmo salar L) diets. Comp Biochem Physiol, Part A Mol Integr Physiol. 2007;148(2):382-92.
Miller, M. R., Nichols, P. D., & Carter, C. G. (2007). Replacement of fish oil with thraustochytrid Schizochytrium sp. L oil in Atlantic salmon parr (Salmo salar L) diets. Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology, 148(2), 382-92.
Miller MR, Nichols PD, Carter CG. Replacement of Fish Oil With Thraustochytrid Schizochytrium Sp. L Oil in Atlantic Salmon Parr (Salmo Salar L) Diets. Comp Biochem Physiol, Part A Mol Integr Physiol. 2007;148(2):382-92. PubMed PMID: 17588797.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Replacement of fish oil with thraustochytrid Schizochytrium sp. L oil in Atlantic salmon parr (Salmo salar L) diets. AU - Miller,Matthew R, AU - Nichols,Peter D, AU - Carter,Chris G, Y1 - 2007/05/29/ PY - 2007/03/25/received PY - 2007/05/18/revised PY - 2007/05/21/accepted PY - 2007/6/26/pubmed PY - 2007/10/20/medline PY - 2007/6/26/entrez SP - 382 EP - 92 JF - Comparative biochemistry and physiology. Part A, Molecular & integrative physiology JO - Comp. Biochem. Physiol., Part A Mol. Integr. Physiol. VL - 148 IS - 2 N2 - Replacing fish oil with that from a docosahexaenoic acid (22:6omega3, DHA) rich single cell micro-organism, thraustochytrid Schizochytrium sp. L, in diets for Atlantic salmon (Salmo salar) was investigated. Four experimental diets containing 100% thraustochytrid oil (TO), 100% palm oil (PO) and a 4:1 palm and thraustochytrid oil mixture (MX) were compared to a fish oil (FO) diet over 9 weeks. A saltwater transfer challenge occurred at the end of the trial for 14 days to test the diet treatments on the ability of salmon to smolt. There were no significant differences in the feed consumption of the diets or the digestibility of the omega3 or omega6 PUFA, indicating no differences in the digestibility of fatty acids between diets. No significant differences were noted between the growth of fish on the four diet treatments. Significant differences were noted in the fatty acid profiles of the fish muscle tissues between all diets. Fish on the TO diet had a significantly greater percentage of DHA in muscle tissue compared with fish on all other diets. Blood osmolarity, which is inversely related to the ability of salmon to smolt, from the TO and FO fed fish was significantly lower than that of fish on the PO diet. This study showed that thraustochytrid oil can be used to replace fish oil in Atlantic salmon diets without detriment to the growth of parr. Including thraustochytrid oil in fish diets significantly increases the amount of DHA in Atlantic salmon muscle and therefore is a candidate for use in oil blends for salmon diets. Thraustochytrid oil provides a renewable source of essential fatty acids, in particular DHA, for aquafeeds. SN - 1095-6433 UR - https://www.unboundmedicine.com/medline/citation/17588797/Replacement_of_fish_oil_with_thraustochytrid_Schizochytrium_sp__L_oil_in_Atlantic_salmon_parr__Salmo_salar_L__diets_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1095-6433(07)01025-2 DB - PRIME DP - Unbound Medicine ER -