Comparative Analysis Of Plastic Attributes Of Different Carp Koi Forms (cyprinus Carpio Koi)
O. O. Lysak, P. H. Shevchenko, V. V. Tsedyk
Japanese carp or carp koi ( Cyprinus carpio koi) – is a freshwater, partially saltwater fish which is a decorative subspecies of carp ( Cyprinus carpio L.) namely a primary black form of carp koi that has its domestic name Magoi. Constant complex activity of abiotic and biotic factors together with husbandry and selectional activity of human caused significant changes in water ecosystems that impacted on the biology of carp koi subspecies (Cyprinus carpio koi) and as a result caused the species-specific morphological adaptations in fish. Collection of materials was conducted from ornamental water ponds at the territory of Nemishaievo state agrotechnical college in the spring 2012. Author selected 3000 units of this year fish offsprings of carp koi with different colors. All the studied fish was divided into groups according to external indexes ( among them color) in the following way: group I (sample) – grey and white form (Hikarimuji which is the most similar to Magoi), group II – black and white form (Kumonryu), group III – black and yellow form ( Utsurimono), group IV – red and white form (Kohaku). For further researches scientists selected 25 exemplars of carp koi for each group. It is necessary to have a starting point (sample) for statistical research of differences in carp koi forms. Sample or optimal form was determined by distances of deviations of scalar sums of form vectors of carp koi from nyvkivskyi carp. Morphometric study of carp koi was conducted according to 30 plastic attributes, in accordance with method proposed by I. F. Pravdin. In contrast with generally accepted relative magnitudes of indexes of plastic attributes of carp koi body were calculated from zoological (not standard) length of the body of the fish that is connected with using koi as an object of decorative aquaculture.