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Efficiency of selenium ion
inclusion into common carp (Cyprinus carpio L.) diets
Magdy M. Gaber
National Institute of Oceanography and Fisheries, Cairo
Egypt. E-mail:
gabermagdy@yahoo.com.
Accepted 25 February, 2009 |
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Efficiency of the increase diets nutritional value by adding
selenium as microelement into diets common carp fingerlings
were studied using aquarium and cement tanks systems, which
allowed feeding and continues measurement of growth
parameters. In experiment (I) one hundred and fifty
fingerlings each weighing approximately 7.5 ± 0.23 g was
carried out, in aquarium and fed either normal diet (group
A) or diets supplemented with 0.08, 0.16, 0.32 and 0.64 mg
kg-1 of sodium selenite. In experiment (II) three
hundred and sixty juvenile common carp, average weight 26.9
± 1.38 g was carried out in cement tanks and fed as in
experiment (I). When selenium added to the diets and fed to
the fish caused a significant increase in weight gain and
carp fingerlings growth rate was accelerated by 18-22% feed
expenditure out by 17-18% as compared to the control diet.
Significant differences in survival rate were found between
treatments, indicating that diets are likely to be
responsible for increased survival rate, observed in fish
fed diets supplemented with 0.24 and 0.32 mg kg-1
sodium selenite (0.12 and 0.15 mg kg-1 selenium).
The results of this study indicated that a diet supplement,
0.24 and 0.32 mg kg-1 of sodium selenite (0.12
and 0.15 mg kg-1 selenium), is important for
growth and survival of common carp.
Key words:
Selenium; growth, common carp, mineral contents. |
