Grunenwald, M and Adams, MB and Carter, CG and Nichols, DS and Koppe, W and Verlhac-Trichet, V and Schierle, J and Adams, LR, Pigment-depletion in Atlantic salmon (Salmo salar) post-smolt starved at elevated temperature is not influenced by dietary carotenoid type and increasing α-tocopherol level, Food Chemistry, 299 Article 125140. ISSN 0308-8146 (2019) [Refereed Article]
© 2019 Published by Elsevier Ltd.
Pigment-depletion in the fillets of farmed Atlantic salmon (Salmo salar) arises after periods of elevated water temperatures with voluntary starving. This study tested the effects of dietary pre-loading with different pigment carotenoids (astaxanthin and/or canthaxanthin) combined with two α-tocopherol levels (normal and high: 500 and 1000 mg/kg, respectively) on pigment-depletion in vivo in Atlantic salmon after four weeks of challenge. We also tested whether oxidative stress manifested as an underlying depletion mechanism.
Carotenoid levels in whole fillet homogenates were not decreased significantly post-challenge but fillet α-tocopherol concentrations were increased significantly in contrast to decreased oxidative stress indices. However, image analysis revealed localised fillet pigment-depletion following all dietary treatments. These data imply that localised pigment-depletion was not prevented by pre-loading of the fillet with different carotenoid-types/mixtures and increased of α-tocopherol levels from normal to high, respectively. Further, we suggest that oxidative stress might not facilitate pigment-depletion in vivo.
|Item Type:||Refereed Article|
|Keywords:||Atlantic salmon, carotenoids, pigmentation, oxidative stress, elevated temperature, alpha-tocopherol|
|Research Division:||Agricultural, Veterinary and Food Sciences|
|Research Group:||Fisheries sciences|
|Objective Division:||Animal Production and Animal Primary Products|
|Objective Group:||Fisheries - aquaculture|
|Objective Field:||Aquaculture fin fish (excl. tuna)|
|UTAS Author:||Grunenwald, M (Dr Martin Grunenwald)|
|UTAS Author:||Adams, MB (Dr Mark Adams)|
|UTAS Author:||Carter, CG (Professor Chris Carter)|
|UTAS Author:||Nichols, DS (Dr David Nichols)|
|UTAS Author:||Adams, LR (Dr Louise Adams)|
|Web of Science® Times Cited:||3|
|Deposited By:||Fisheries and Aquaculture|
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