Chronohaematological changes in the lizard Calotes versicolor after pinealectomy.

Chronohaematological study was performed on the blood of pinealectomized and sham-operated lizards over a 48 hrs. time scale. Pineal removal significantly inhibited leucocytopoisis, erythropoiesis and led to hypoglycemia, as evident from lowered circulating number of cells and level of glucose respectively. However existence of circadian rhythm in WBC, RBC and glucose level of sham-operated lizards was evident. Influence of pineal extirpation on chronohaemotology varied with time scale (Time X Pinealectomy P less than 0.01).