The experiment was conducted in the animal field of the College of Agriculture - University of Basra between 1 October to 29 December 2021, to investigate the effect of environmental variation on growth, food and water consumption and some biochemical parameters of Arabi sheep and local goats. A total of twelve animals (6 lambs and 6 kids) aged between 7 and 8 months and weighed (20.85, 20.30) kg respectively, were divided into two groups (each type in one group). The results showed a significant (P<0.05) increase in body weight, daily and total weight gain, food consumption, total protein, albumin and cholesterol concentration, but there was a significant (P<0.05) decrease in water consumption and glucose concentration in sheep compared to goats. Body weight increased significantly (P<0.05) when the temperature decreased to below 36.42 Co , while the greatest daily weight gain was recorded at the temperature of 19.56 Co . Globulin levels decreased significantly (P<0.05) at high temperatures (36.42 Co ). The concentration of cholesterol and glucose gradually increased when the temperature decreased from 36.42 Co to 12.33 Co . Keywords: Temperature, humidity, sheep, goats, growth,Physiological trails.

Temperature, humidity, sheep, goats, growth,Physiological trails.