A comparison of chemical composition between diploids and triploids of "ginbuna" Carassius auratus langsdorfi.

Abstract

The diploid and triploid populations of “ginbuna” Carassius auratus langsdorfi were com-pared in terms of several consituents in the muscle and blood. The muscles of both populations did not differ clearly from each other in the proximate and protein compositions. No significant differences were found in the hematocrit value and hemoglobin level of the blood either. Activities of some erythrocyte glycolytic enzymes such as hexokinase and phosphofructokinase were 1.26-1.35 times higher in the triploid than in the diploid, on a per cell basis. However, the activities of each enzyme matched well each other on a unit blood volume basis. This, together with other results, suggested that a regulation system is retained in the triploid so that its metabolic rate is controlled at the diploid level.