Application of the assessment method for loading the fishponds with ducks under the conditions of complete integration
2006
Nikolova, L. (Institute of Fisheries and Aquaculture, Varna (Bulgaria))
After a 5-year study on the integration of fish and ducks in warm fishponds (n=32) under the conditions of Bulgaria, carried out at the Institute of Fisheries and Aquaculture - Plovdiv, an analysis was made about the possibilities of applying the methods of complex assessment of the fishponds with ducks under the conditions of complete integration. The method developed by the author (Nikolova, 2003) suggests that for conducting the complex assessment of the effect of waterfowls on the fishpond it is advisable to use the coefficient loading with ducklings (Kd). The effect of the ducks on the fish production indices could be more logically explained by the coefficient of pond loading with ducks rather than by the effect of the separate factors included as elements of the formula for calculating the former. Out of that reason it is recommended to use it as a complex index about the duck influence on the fishpond.
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