| Popis: |
Carp of the initial individual weight of 30 g/ind. (±5 g) were fed for 83 days with three kinds of extruded, isoprotein (47.5%) feeds differing in the lipid content (9.1%, in feed A, 12.9% in feed B, and 17.0% in feed C). The main source of the lipids was a poultry fat. After the completion of the experiment the following values of the Specific Growth Rate, SGR index were achieved (respectively): 2.45, 2.75, 2.59% The values of Food Conversion Ratio, FCR were as follows: 1.27, 1.10, 1.21, while the Energy Retained index was respectively: 23.7, 29.6, and 26.6%. In the present experiment consisting in feeding the carp fry in the conditions of cooling water at 13.1-31.2°C, the most favourable results of rearing were achieved using the extruded feed containing12.9% of lipids. The lipids consisted of 2/3 of poultry fat and 1/3 of structural fish fat. |
