Comparative assessment of physiological and immunological indicators in different crosses of the carp ( <i>Cyprinus carpio</i> L.)
Comparative study was curried out on immunobiochemical indicators of serum of blood, liver and kidneys in two-year-olds carps of different crosses. In the trial, there were used 40 individuals from fish-breeding farms of the 2nd (Kir, Chuvash Republic) and the 5th (Ergeninsky and Flora, Volgograd oblast) fish-breeding zones. Cross Petrovsky (selection achievement, the patent No. 4805, 2009) is hybrid of Chuvash scaly and anishsky mirror breeds. Cross Mirror is a result of crossing males of Moldavian mirror line and females of Volga ramchaty carp. Cross Ergeninsky is received by reciprocal crossing Scaly local and Moldavian mirror forms. Reference values were tabulated on circulating immune complexes, malonate dialdehyde and parameters of anti-oxidant capacity in carp of different origin. The obtained data show that crosses Ergeninsky (mirror group) and Petrovsky are characterized by the most stable immunobiochemical status in all studied tissues which indicates the highest resistance of these groups to possible infections, invasive diseases and to deviations in cultivation conditions.