Effects of Triploidy on Hematological Characteristics and Oxygen Consumption in Ayu

Abstract

The hematological characteristics and oxygen consumption of diploid and triploid ayu Plecoglossus altivelis were examined to understand the physiological difference between them. Triploids were larger in erythrocyte size but smaller in erythrocyte number than diploids. The nuclei in triploids were also larger than in diploids. Values of MCV and MCH in triploids were larger than in diploids. The values of hematocrit, hemoglobin and MCHC were almost the same in both ploidies. Triploids tended to show higher oxygen consumption than diploids, but the difference was not statistically significant. © 1991, The Japanese Society of Fisheries Science. All rights reserved.