1. Haematological and respiratory parameters (including RBC count, CO2 content and percentage oxygen saturation) were studied in coldacclimated (12 ± 1 °C) and normal frogs (23 + 2 °C). 2. Seasonal variation in RBC count was found, the count being higher in January than in September. Females showed higher counts than males. Coldacclimation resulted in the elevation of counts in all seasons and ...