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Processing of astaxanthin-rich Haematococcus cells for dietary inclusion and optimal pigmentation in Rainbow trout, Onchorynchus mykiss L.

Young, AJ and pritchard, J and White, D and Davies, S Processing of astaxanthin-rich Haematococcus cells for dietary inclusion and optimal pigmentation in Rainbow trout, Onchorynchus mykiss L. Aquaculture Nutrition. ISSN 1365-2095 (Accepted)

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Abstract

A range of physical cell disruption techniques have been evaluated to aid the processing of astaxanthin-rich haematocysts of Haematoccus pluvialis for inclusion in
salmonid feeds. Cell disruption by a scaleable pressure treatment system was shown to be effective in breaking open the haematocysts without altering the content or
isomeric composition of carotenoids in the algal cells. Storage of disrupted cells was optimal at -20°C in the dark under nitrogen. Disrupted cells were spray-dried,
incorporated into commercial diets and fed to Rainbow trout (Onchorynchus mykiss L). A marketable level of pigmentation in fish muscle was achieved after 10 weeks
dietary supplementation. The geometric and optimal isomer composition of the astaxanthin deposited in the muscle was nearly identical to that seen in
Haematococcus. Changes were observed in the chirality of the astaxanthin deposited in the skin in comparison to that isolated from both the white muscle and the alga.

Item Type: Article
Uncontrolled Keywords: 0704 Fisheries Sciences
Subjects: Q Science > QH Natural history > QH301 Biology
S Agriculture > SH Aquaculture. Fisheries. Angling
Divisions: Natural Sciences and Psychology
Publisher: Wiley: 12 months
Date Deposited: 07 Sep 2016 09:11
Last Modified: 07 Sep 2016 09:11
URI: http://researchonline.ljmu.ac.uk/id/eprint/4096

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