Abstract
THE results of several investigations have suggested the possibility that gonadal hormones affect hemoglobin levels. Harmon (1936) found no significant difference in hemoglobin levels of male and female chicks up to 8 weeks of age, although cocks had higher levels than hens and capons. This phenomenon was noted also in pigeons and doves by Riddle and Braucher (1934). Tanaka and Rosenberg (1954) reported that mature males had significantly higher Hb* levels than females from 24 to 80 weeks of age. In their investigation, laying chickens had lower Hb levels than nonlaying birds from the same hatch, and Hb levels varied significantly within individuals, being higher during periods of pause and partial molt than during egg production. These phenomena were observed both in mature pullets and yearling hens. Steinglass et al. (1941) reported that, in rats, normal males had higher Hb values than norml females. Following castration, the erythrocyte numbers and …
Published Version
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