いくつかの量的形質に関する横斑鶏と優性白色鶏の比較研究

1. 初期成長と生理諸元に及ぼす環境温度の影響

抄録

Early growth rate, rectal temperature, respiration rate and pulse rate were compared between barred (i/i, B/(B) and dominant white (I/i, B/(B) chickens under both standard (normal) and high environmental temperatures. The body weight of the barred birds at 4, 6 and 8 weeks of age exceeded those of their white fullsibs under the standard conditions of temperature. Whereas, no significant difference was observed between both color type when they were reared in the high temperatures. It was suggested that the heat load which caused supression in the growth and rise in the respiration rate might be higher in the barred chickens than the white ones under the high environmental temperatures.