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THE INFLUENCE OF THE SEX HORMONES ON THE BURSA OF FABRICIUS AND THE PELVIS IN THE RING-NECKED PHEASANT 1

1944; Oxford University Press; Volume: 34; Issue: 5 Linguagem: Inglês

10.1210/endo-34-5-340

1945-7170

Carl M. J. Kirkpatrick, F. N. Andrews,

Urological Disorders and Treatments

IT HAS LONG been known that the bursa of Fabricius, a dorsal diverticulum of the cloaca, is characteristically present in young birds but is almost always absent in the adult with the exception of the Ratitae. Jolly (1915) referred to the bursa as a “cloacal thymus,” reported that in the fowl maximum bursa size occurred at approximately four months, and that initiation of bursa involution coincided with the appearance of sexual maturity. Riddle (1928) found that in doves and pigeons the ovaries and testes developed slowly and appeared to be suppressed during the period of rapid body, bursa, and thymus growth. Involution of the bursa began immediately following its maximum development, and was usually complete at the time of sexual maturity. The period of involution coincided with the phase of rapid gonad devlopment and the relationship of the bursa to the growth of the gonads was regarded as suggestive evidence of an endocrine function of the bursa.