Possibilities to raise vitamin D content of rainbow trout (Oncorhynchus mykiss) by elevated feed cholecalciferol contents
✍ Scribed by Mattila, Pirjo; Piironen, Vieno; Hakkarainen, Tuuli; Hirvi, Timo; Uusi-Rauva, Esko; Eskelinen, P�ivi
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 107 KB
- Volume
- 79
- Category
- Article
- ISSN
- 0022-5142
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✦ Synopsis
Farmed rainbow trout (Oncorhynchus mykiss) is a widely consumed üsh species. The cholecalciferol content in the muscle of rainbow trout is, however, quite low compared with that in several wild üsh species. The present study was designed to determine whether it is possible to increase the cholecalciferol content of rainbow trout (initial weight about 500 g) with the use of cholecalciferoldosed feeds. Three diþ erent cholecalciferol concentrations (8.9, 17.4 and 53.9 lg 100 g-1 feed) were tested. After 4 months of feeding, the cholecalciferol determinations from samples of muscle and liver were performed using an HPLC method. Here, we suggest that the cholecalciferol content of rainbow trout muscle cannot be increased by feeding them with elevated doses of the vitamin.