Comparison proportion of Cyprinus carpio according to scale

The aim of the study was to compare the yield of scaly carp and mirror carp, two major representatives of the common carp (Cyprinus carpio), predominantly bred in the Czech Republic. The yield comparisons were performed in a newly created company store, where it was important to assess the suitability of fish for different products. A partial objective was, through a questionnaire survey, to determine the popularity and frequency of the consumption of carp. Finally, the intensity of individual forms of carp was monitored. The experiment was conducted in the years 2012-2013 during the four seasons spring, summer, autumn and after relaying. The evaluation took place for two types of carp, the mirror carp and the scaly carp. Another reference subject was two ponds, the naturally fed Vrbský Pond and the feeding pond Musik. Both carp are characterized by distinct developmental and life cycles. The mirror carp, the body structure of which is smaller than the scaly carp, demonstrated a higher yield in all monitored aspects at the end of the evaluation. At the same time, the fillet yield of both representatives achieved similar values and ranged from about 43-48%. The carp from the feeding pond Musik gave a surprising result, where a lower yield was expected due to the lower amount of plankton and zoobenthos, a natural food for fish. During the monitored period, the highest yield was recorded in the period after relaying, while the lowest yield in the spring, due to the selected increased fish stock for the given year