Modifying Influence of Light on Chick's Comb Response to Androsterone

Abstract

SummaryExposure to varying degrees of light influenced the weight response of male chicks' combs to which androsterone had been applied by inunction. The weight response of the combs to androgenic stimulation is considerably greater in birds receiving normal daylight than in those kept in the dark or in inadequate light. Body weights of the various groups indicate a lack of growth which is in direct correlation to the lack of light. The importance of exposing the test birds to an adequate and a constant source of light is emphasized if this method is to be used for the assay of unknown androgens.