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Influence of various dietary synthetic carotenoids on bio-defence mechanisms in rainbow trout, Oncorhynchus mykiss (Walbaum)

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Date
2001
Author
Amar, Edgar. C. ORCID
Kiron, V.
Satoh, S.
Watanabe, T.
Page views
4,194
Subject
animal nutrition ASFA
health ASFA
carotenoids ASFA
defence mechanisms ASFA
diet ASFA
feed composition ASFA
feeding experiments ASFA
growth rate ASFA
immunity ASFA
phagocytosis ASFA
vitamin a ASFA
vitamin C ASFA
vitamin E ASFA
vitamins ASFA
Oncorhynchus mykiss AGROVOC
immune response AGROVOC
Rainbow trout AGROVOC
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Abstract
This study examined the influence of different carotenoids on growth and some immune indices in rainbow trout. Six semipurified casein-based diets were formulated to contain one of three different carotenoids: astaxanthin, canthaxanthin and β-carotene, at 100 mg kg−1, each of them with vitamins A, C and E either added or omitted. The two control diets contained no carotenoids and were either with or without the vitamins. Rainbow trout weighing about 140 g were fed the diets for 9 weeks. Specific growth rate, feed:gain ratio and nonspecific immune parameters were determined. Growth and feed conversion were similar among the groups. Immune parameters like production of reactive oxygen species by head kidney leukocytes and plasma total immunoglobulin levels did not vary with the treatment. Serum complement activity in both β-carotene groups and the vitamin-containing astaxanthin group were significantly higher than both the control fish. Serum lysozyme activity in the vitamin-containing β-carotene and astaxanthin groups were significantly different from both control groups. Phagocytic activity was also high in the vitamin-containing β-carotene and astaxanthin groups compared with the controls. For phagocytic index, in addition to the foregoing groups, the vitamin-containing canthaxanthin group gave better results compared with the controls. The vitamin-containing astaxanthin and β-carotene groups also exhibited better nonspecific cytotoxicity for the peripheral blood lymphocytes at all effector-to-target ratios. Thus, among the carotenoids studied, β-carotene and astaxanthin elevated humoral factors such as serum complement and lysozyme activity, as well as cellular factors such as phagocytosis and nonspecific cytotoxicity. In the presence of the vitamins the carotenoids exerted a greater influence on the bio-defense mechanisms of rainbow trout.
URI
http://hdl.handle.net/10862/1887
Suggested Citation
Amar, E. C., Kiron, V., Satoh, S., & Watanabe, T. (2001). Influence of various dietary synthetic carotenoids on bio-defence mechanisms in rainbow trout, Oncorhynchus mykiss (Walbaum). Aquaculture Research, 32(Suppl. 1), 162-173. https://doi.org/10.1046/j.1355-557x.2001.00051.x 
DOI
10.1046/j.1355-557x.2001.00051.x
Type
Article
ISSN
1355-557X
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  • Journal Articles [1160]

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