Effect of heat and several additives related to stress levels on fluctuating asymmetry, heterophil:lymphocyte ratio, and tonic immobility duration in White Leghorn chicks

摘要: The purpose of this study was to analyze the effects heat and several additives related stress on fluctuating asymmetry (groups 1 10), heterophil:lymphocyte ratio 3 8 tonic immobility duration 7 10) in White Leghorn chicks at 42 d age. Chicks group (heat) were reared with temperatures 8°C greater than those control group. Groups 2 9 consisted addition capsaicin, allicin, ascorbic acid, tryptophan, brewer's yeast, lactic corticosterone, or cholesterol diet. 10 (control) standard temperatures. Heat effect significant (P<0.05) for ratio, which heat-stressed without any smaller chicks. There no differences between both groups. Heterophil:lymphocyte capsaicin allicin significantly lower that additives. Capsaicin not duration, whereas increased wing length (P<0.05). acid corticosterone resulted In conclusion, an found additives, indicating it is a more reliable indicator addition, dietary supplementation effective alleviate induced by high temperature, as indicated ratio.