Female gonads of the perch (Perca fluviatilis) in various stages of development are tested for hemagglutinin activity against human erythrocytes. Based on the different agglutination patterns obtained...
Four-day-old chick embryos were hormonally treated with 19-nortestosterone in order to inhibit bursa development. At days 1, 4, 8, 15, 22, 29, and 36 of age, plasma, adrenals, and gonads from intact a...