Essential fatty acids in Atlantic salmon: effects of increasing dietary doses of n-6 and n-3 fatty acids on growth, survival and fatty acid composition of liver, blood and carcass.

By Ruyter, Røsjø, Einen, Thomassen. 2000

134 citations recorded by the source corpus.

Atlantic salmon fry (4 g) were fed for 4 months on semi-synthetic diets containing fatty acid methyl esters of either 18:2 n-6, 18:3 n-3 or a mixture of equal amounts of 20:5 n-3 and 22:6 n-3. The different amounts of polyunsaturated fatty acids added were 0, 0.1, 0.2, 0.5, 1 and 2% (by dry weight). Increasing levels of dietary n-3 fatty acids up to 1% gave faster growth rates in salmon fry, and fish fed the mixture of 20:5 n-3 and 22:6 n-3 seemed to grow faster than fish fed only 18:3 n-3. No significant effect on growth rate was seen when the dietary level of 18:2 n-6 was increased. Dietary inclusions of n-3 fatty acids reduced the mortality of salmon, while dietary 18:2 n-6 had no such beneficial effects. The dietary treatments caused substantial changes in the fatty acid composition of blood and liver phospholipids (PL), whereas the total lipid fraction of the carcass was less affected. Increasing doses of 18:2 n-6 in the diet resulted in an increased percentage of 20:4 n-6 in liver and blood PLs, while the percentage of 20:3 n-9 decreased. The percentage of 18:2 n-6 also increased in liver, blood and carcass. Dietary 18:3 n-3 resulted in increased percentages of 18:3 n-3 and 20:5 n-3 in liver PLs, while the percentage of 20:3 n-9 decreased. There was, however, no significant increase in the percentage of 22:6 n-3. Dietary 18:3 n-3 produced no significant changes in the composition of blood fatty acids, but increased the percentage of 18:3 n-3 in the carcass. The dietary combination of the n-3 fatty acids 20:5 and 22:6 resulted in an increased percentage of 22:6 n-3 in blood and liver lipids and a decreased percentage of 20:3 n-9, but there were no changes in the percentage of 20:5 n-3.

Subfields: Aquatic Science, Immunology, Physiology

View Paper: https://www.semanticscholar.org/paper/a103b0b70f362b39441fdbf1ccc933e0963e0141

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Aquatic Science

1. B. Glencross
2. D. Tocher
3. Ó. Monroig
4. G. Allan
5. M. Booth
6. C. J. Shepherd
7. C. Parrish
8. G. Turchini

In Immunology

1. B. Glencross
2. D. Tocher
3. Ó. Monroig
4. C. J. Shepherd
5. G. Allan
6. M. Booth
7. C. Parrish
8. G. Turchini

In Physiology

1. Ó. Monroig
2. D. Tocher
3. B. Glencross
4. C. J. Shepherd
5. G. Allan
6. M. Booth
7. C. Parrish
8. G. Turchini

Citations in the corpus

• A feed is only as good as its ingredients – a review of ingredient evaluation strategies for aquaculture feeds (2007, background): “potential ingredient effects (Ruyter et al. 2000; Booth & Allan 2003).”
• Future availability of raw materials for salmon feeds and supply chain implications: the case of Scottish farmed salmon (2017, background): “…and DHA for global salmon feed falls below 4% of the total dietary oil fraction (equivalent to c. 1.2% of total feed), this then approaches the 1% risk area for essential fatty acid deficiency in salmon and could predispose to health problems or reduced performance (Ruyter et al., 2000a, 2000b).”
• Essential fatty acids in Atlantic salmon: time course of changes in fatty acid composition of liver, blood and carcass induced by a diet deficient in n-3 and n-6 fatty acids. (2000, background): “In parallel groups given a dietary supply of long-chain n-3 PUFAs, the growth rates were also slow during the ®rst part of the study (Ruyter et al. 2000).”