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Inclusion of macroalgae meal ( Macrocystis pyrifera ) as feed ingredient for rainbow trout ( Oncorhynchus mykiss ): effect on flesh fatty acid composition
Author(s) -
Dantagnan Patricio,
Hernández Adrián,
Borquez Aliro,
Mansilla Andrés
Publication year - 2009
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2009.02308.x
Subject(s) - rainbow trout , biology , polyunsaturated fatty acid , fish meal , flesh , macrocystis pyrifera , composition (language) , food science , ingredient , meal , commercial fish feed , fatty acid , fishery , zoology , aquaculture , kelp , biochemistry , fish <actinopterygii> , botany , philosophy , linguistics
The use of macroalgae as an additional component in animal feeding has been studied. However, information on how it could influence muscle composition of fish body is scarce. This study evaluates four diets with different macroalgae inclusion levels (0%, 1.5%, 3% and 6%) to test the effect on body fatty acid composition of rainbow trout. Tanks with a volume of 600 L were stocked with 60.6 ± 7.9 g fish at a density of 45 individuals tank −1 and fed for 124 days. At the end of the experiment there were not significant differences ( P <0.05) in muscle proximate composition among fish fed the different treatments. However, it was determined that inclusion of 3% and 6% of macroalgae meal resulted in a significant increase ( P <0.05) of polyunsaturated fatty acids (PUFAs) in muscle. In summary, macroalgae meal in rainbow trout diets do not enhance the quantity of protein and lipid contents at muscle level but an addition of 3–6% might contribute to increase the level of PUFAs, specially EPA, DHA and LIN. Thus, use of macroalgae meal might help to increase lipid quality content in the final product due the beneficial effects of PUFAs for human health.