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Influence of dietary vitamin B 6 on tissue vitamin B 6 contents and immunity in Atlantic salmon, Salmo salar L.
Author(s) -
Albrektsen S,
Sandnes K,
Glette J,
WaagbØ R
Publication year - 1995
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.1365-2109.1995.tb00921.x
Subject(s) - salmo , biology , aeromonas salmonicida , lysozyme , immune system , immunity , vitamin , pyridoxine , fish meal , zoology , fishery , fish <actinopterygii> , endocrinology , immunology , biochemistry
Atlantic salmon, Salmo salar L., (14 g) were fed a practical fish‐meal‐based diet supplemented with 0. 10, 20. 40, 80 and 160 mg pyridoxine (PN) per kg feed for 20 weeks. Tissue vitamin B 6 contents were significantly reduced in fish fed the non‐supplemented diet compared with fish fed PN‐supplemented diets. Serum haemolytic complement activity and head kidney lysozyme activity, and the specific antibody response following immunization with Vibrio salmonicida. were not influenced by the dietary regimes. Challenge with Aeromonas salmonicida showed that increasing the dietary levels of vitamin B 6 did not improve the resistance to furunculosis. Growth, mortality and haematology were not affected by supplementing a practical diet with vitamin B 6 In conclusion, feed levels of vitamin B 6 higher than the minimum dietary requirement did not enhance immune functions and disease resistance in Atlantic salmon.