Seasonal changes in the blood parameters of two major carps, Labeo rohita (Ham.) and Cirrhina mrigala (Ham.).

Seasonal changes in blood properties of two Indian major carps, L. rohita and C. mrigala, were investigated. Haematocrit values, haemoglobin concentrations and erythrocyte numbers showed seasonal fluctuations, being high from September to November and again in April-May, and low from January to March. Males had generally higher blood values than the females.