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Publisert 2007

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Tidsskrift : Aquaculture , vol. 263 , p. 179–191 , 2007

Utgiver : Elsevier

Internasjonale standardnummer :
Trykt : 0044-8486
Elektronisk : 1873-5622

Publikasjonstype : Vitenskapelig artikkel

Bidragsytere : Ytrestøyl, Trine; Bjerkeng, Bjørn

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Kjetil Aune


Doses of 12.5, 25 or 50 mg astaxanthin (Lucantin Pink, 10% astaxanthin; BASF, Germany) were dispersed in phosphate
buffered saline solution and injected into the abdominal cavity of duplicated groups of Atlantic salmon (Salmo salar; 370 g) and
Atlantic cod (Gadus morhua; 210 g) to determine the dose-response relationships for astaxanthin E/Z-isomers and the metabolite
idoxanthin in plasma, muscle, liver, kidney and skin, in fish species that usually have white or red flesh. The control fish groups of
both species were injected with astaxanthin in phosphate buffered saline solution. Following injection the fish were fed a diet with
10 mg astaxanthin kg-1 of which 84% was the all-E-isomer, 6.7% the 9Z and 9.3% the 13Z-isomer, respectively. Astaxanthin
concentrations increased linearly in a dose-dependent manner in plasma and muscle of both species (Pb0.0001), and were highly
correlated (Pb0.0001). Concentrations up to 90 and 50 mg astaxanthin l-1 in plasma and 30 and 1 mg astaxanthin kg-1 in muscle
were detected in Atlantic salmon and cod, respectively. Unsaturated binding capacity was indicated by the linear dose-response of
muscle astaxanthin. Astaxanthin E/Z isomer accumulation in the various tissues was selective. A selective accumulation of
astaxanthin Z-isomers, and in particular the 13Z-isomer, in plasma, muscle and liver was found in Atlantic salmon and Atlantic cod
injected with astaxanthin compared to control fish (Pb0.0001). No mortality, but a reduction in growth was evident by increasing
doses. Higher astaxanthin concentrations in plasma, muscle, skin, kidney and liver of Atlantic salmon and Atlantic cod may thus be
obtained by intraperitoneal injection than by regular feeding. Cellular incorporation mechanisms in the muscle apparently explain
the differences in astaxanthin uptake in the muscle of these fish species.
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