Effects of oxytetracycline containing feed on pond ecosystem and health of carp (Cyprinus carpio L.)
2006
Svobodova, Z. | Sudova, E. | Nepejchalova, L. | Cervinka, S. | Vykusova, B. | Modra, H. | Kolarova, J.
The aim of the present study was to assess the effects of medicated feed, Rupin Special gran. ad us. vet. with oxytetracyclini chloridum as active ingredient (5 g/kg feed), on physical and chemical characteristics of a pond ecosystem and the health of carp of two age groups in a pilot operation. The medicated feed was administered in 8 doses (15 g/kg live weight). Temperature, oxygen concentration, pH, microbiological, hydrobiological and hydrochemical variables of pond water were monitored. Eighty carps were examined before, during, immediately after and 15 days after the administration of medicated feed. Losses of haematopoietic tissue from the spleen and dystrophic changes in the renal duct epithelium were observed after the application of 8 doses. Significant decrease in leukocyte and lymphocyte counts and in total blood plasma protein concentrations were observed already after the 3rd dose of Rupin Special. No effects on water quality were found. In conclusion, Rupin Special should be used in only 4 (exceptionally 6) doses.
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