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Diurnal changes in plasma testosterone concentrations in Japanese quail males and females

, : Diurnal changes in plasma testosterone concentrations in Japanese quail males and females. Vedecke Prace Hydinarstvo (21): 47-55

Data were obtained on 90 Japanese quails, aged 70 days. 15 and 10 were slaughtered at 4-h intervals under a constant light regime of 14-h light:10-h darkness. In testosterone concentration, estimated by radioimmunoassay, was 12.7-21.6 nmol/litre (18-21.6 nmol/litre during the dark phase and 12.7-17 nmol/litre during the light phase). In the concentrations were 2.3-4.0 nmol/litre (2.3-2.8 nmol/litre in the dark phase and 2.4-4.0 nmol/litre in the light phase).


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