ISSN:
1365-2761
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Biology
,
Medicine
Notes:
Two purified diets supplemented with 0 or 20 000 IU vitamin D3 kg−1 of diet were fed to amago salmon, Oncorhynchus rhodurus (Jordan & McGregor), for 22 weeks. The feeding stopped when fish with deficiency signs including reduced growth, and caudal region and fin tip damage increased in number. Deficient fish had a thinned epidermis consisting of atrophied and necrotic epidermal cells over the basal cells. In lesions of the caudal peduncle, the skin and the underlying musculature were extensively necrotized. The liver showed degenerated and necrotic hepatocytes. Respiratory epithelium and cardiac muscle fibres were swollen. Hypocalcaemia was evident. No pathological changes were found in bone, eyes, brain and alimentary tract. The control groups fed a nutritionally complete diet grew well and displayed no pathological changes. The pathological changes were reversed after 4 weeks of feeding of vitamin-D3-suppliemented diet.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1046/j.1365-2761.1996.d01-85.x
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