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dc.contributor.authorAmar, Edgar. C.
dc.contributor.authorKiron, V.
dc.contributor.authorSatoh, S.
dc.contributor.authorWatanabe, T.
dc.date.accessioned2014-01-13T08:57:20Z
dc.date.available2014-01-13T08:57:20Z
dc.date.issued2001
dc.identifier.citationAmar, 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.en
dc.identifier.issn1355-557X
dc.identifier.urihttp://hdl.handle.net/10862/1887
dc.description.abstractThis 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.en
dc.description.sponsorshipThis study was partly funded by the Ministry of Education, Sports, Culture, Science and Technology (MEXT), Japan. We are also grateful to the Roche Vitamin Japan KK for their gift of carotenoids employed in this study.en
dc.language.isoenen
dc.publisherWiley-Blackwellen
dc.subjectOncorhynchus mykissen
dc.subjectimmune responseen
dc.subjectRainbow trouten
dc.titleInfluence of various dietary synthetic carotenoids on bio-defence mechanisms in rainbow trout, Oncorhynchus mykiss (Walbaum)en
dc.typeArticleen
dc.citation.volume32
dc.citation.issueSuppl. 1
dc.citation.spage162
dc.citation.epage173
dc.citation.journalTitleAquaculture Researchen
dc.subject.asfaanimal nutritionen
dc.subject.asfahealthen
dc.subject.asfacarotenoidsen
dc.subject.asfadefence mechanismsen
dc.subject.asfadieten
dc.subject.asfafeed compositionen
dc.subject.asfafeeding experimentsen
dc.subject.asfagrowth rateen
dc.subject.asfaimmunityen
dc.subject.asfaphagocytosisen
dc.subject.asfavitamin aen
dc.subject.asfavitamin Cen
dc.subject.asfavitamin Een
dc.subject.asfavitaminsen
dc.identifier.doi10.1046/j.1355-557x.2001.00051.x


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    These papers were contributed by AQD staff to various national and international journals

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