ISSN:
1365-2095
Quelle:
Blackwell Publishing Journal Backfiles 1879-2005
Thema:
Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
Notizen:
A minor stabilization effect was found for the content of total lipids, total fatty acids and docosahexaenoic acid (DHA) when Artemia franciscana was maintained at high concentrations of Isochrysis galbana for 72 h at 12 °C, both in 3- and 4-day-old individuals. The eicosapentaenoic (EPA) level was only stabilized at higher algal concentrations in the 4-day-old A. franciscana. In the 3-day-old A. franciscana, the EPA content increased at all algal concentrations during the first 24 h of post enrichment, presumably as an effect of DHA catabolism. Apparently, the 4-day-old A. franciscana metabolized DHA, and other lipids, faster than the 3-day-old A. franciscana did. During the 72 h incubation with I. galbana, the content of ascorbic acid (AA) in A. franciscana increased approximately to 1000–1200 μg g–1 dry weight (DW) at algal concentrations above 3 mg C L–1, close to AA content of the algae. The vitamin B6 content in A. franciscana decreased from approximately 20 to 4–11 μg g–1 DW, with highest loss rates at the higher algal concentrations. The thiamin content of A. franciscana was independent of algal concentration and remained at 20–30 μg g–1 DW. The nutritional effects of the algal incubation on the 3- and 4-day-old A. franciscana at algal concentrations which can be used during the cultivation of Atlantic-halibut larvae (〈2 mg C L–1) was insignificant, except for the small enrichment effect of AA already at 1 mg C L–1. Other beneficial effects of the algae should not be ruled out, like possible effects on the microflora of A. franciscana even at algal concentrations less than 2 mg C L–1.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1046/j.1365-2095.2000.00157.x
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