Open AccessSelenium and vitamin E interaction in the nutrition of yellowtail kingfish ( S eriola lalandi ): physiological and immune responses
Author(s) -
Le K.T.,
Fotedar R.,
Partridge G.
Publication year - 2014
Publication title -
aquaculture nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 79
eISSN - 1365-2095
pISSN - 1353-5773
DOI - 10.1111/anu.12079
Subject(s) - biology , vitamin e , micronutrient , vitamin , glutathione peroxidase , antioxidant , immune system , food science , factorial experiment , selenium , zoology , vitamin c , endocrinology , medicine , biochemistry , chemistry , immunology , catalase , statistics , mathematics , organic chemistry
Six dietary treatments were prepared in a 3 × 2 factorial design (unsupplemented or supplemented with Se at 1 or 2 mg kg −1 × supplemented with vitamin E at 40 or 180 mg kg −1 ) and fed to yellowtail kingfish ( S eriola lalandi ) for 6 weeks to evaluate the effects of dietary S e and vitamin E on growth performance, immune and antioxidant responses and to investigate the potential interaction between these two micronutrients in this species. The results have revealed significantly interactive effects with positive physiological responses. Se significantly increased weight gain of fish fed diets low in vitamin E , but not high in vitamin E , whereas serum lysozyme activity was significantly improved by S e in diets high in vitamin E , but not low in vitamin E . Moreover, there was evidence of myopathy in fish deficient in both S e and vitamin E , but not single deficiency. There was no significant effect of dietary S e, vitamin E or their interaction on survival, antibody titre, feed intake, feed conversion ratio and fillet proximate composition; however, fillet S e and vitamin E were significantly responsive to dietary S e and vitamin E , respectively, and higher dietary S e intakes produced significantly higher red blood cell glutathione peroxidase activity.