The inclusion of Palmaria palmata macroalgae in Atlantic salmon (Salmo salar) diets: effects on growth, haematology, immunity and liver function

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• 作者：Alex H. L. Wan ; Anna Soler-Vila ; Damien O’Keeffe…
• 关键词：Atlantic salmon ; Seaweed ; Macroalgae ; Dillisk ; Palmaria palmata ; Blood parameters
• 刊名：Journal of Applied Phycology
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：28
• 期：5
• 页码：3091-3100
• 全文大小：416 KB
• 刊物主题：Plant Sciences; Freshwater & Marine Ecology; Plant Physiology; Ecology;
• 出版者：Springer Netherlands
• ISSN：1573-5176
• 卷排序：28

文摘

A feeding study was carried out for fourteen weeks to evaluate the effects of partial inclusion of 5, 10 and 15 % of dillisk, Palmaria palmata, into formulated Atlantic salmon (Salmo salar) diets. A further fourth diet was produced without the presence of algae and was used as a basal reference diet. All the four diets were formulated to be iso-nitrogenous (40 %), iso-lipidic (25 %) and iso-energetic (26 MJ kg−1). Salmon growth (final body weight, weight gain, feed conversion ratio (FCR), specific growth rate (SGR)) were comparable across algal and control diets, with no significant differences amongst the treatments (P > 0.05). Comparisons of liver weight, viscera weight and viscerosomatic index (VSI) also suggested that the macroalgal inclusion did not affect fish growth (P > 0.05). Fish health indicators across haematological, immunological and hepatic function were generally similar between the experimental diets. The exceptions to this pattern included a significant decrease in alanine transaminase activity (P < 0.05) in the diet with 5 and 15 % P. palmata inclusion compared to other experimental diets. This may indicate that higher P. palmata inclusion improved hepatic function. Seaweed inclusion at 5 % also had positive effects on body lipid content when compared to the control diets. In conclusion, the findings demonstrated that P. palmata can be a suitable feed supplement in Atlantic salmon (S. salar) diets.