Circulating levels of luteinizing hormone and androgen in mature male Japanese quail over 24 hours.
Male Japanese quail on a 16 light:8 dark photoperiod (on at 0600 h) were sampled over 24 h to determine peripheral levels of the luteinizing hormone and testosterone. Six males were sampled (each animal sampled once) at each of 10 sampling periods that began at 0800 h and ended the next morning at 0800 h. Serum testosterone concentrations were greatest at 2000 h and decreased across the night (2200 to 0600 h) to reach a nadir at 0500 h; levels increased in the morning but fell again at 1700 h. Luteinizing hormone levels were more constant, with peaks at 1500 and 0200 h.
Department of Poultry Science, University of Maryland, College Park 20742.
M A
MA
Ottinger
B K
BK
Follett
D000818:Animals; D003370:Coturnix / Q000097:blood*; D008027:Light; D007986:Luteinizing Hormone / Q000097:blood*; D008297:Male; D010507:Periodicity; D011784:Quail / Q000097:blood*; D013739:Testosterone / Q000097:blood*
D013739:Testosterone; D007986:Luteinizing Hormone