Role of gonadal feedback in annual reproduction of the weaver bird: interaction with photoperiod.
D000818:Animals; D001502:Beak / Q000502:physiology; D001717:Birds / Q000502:physiology*; D002369:Castration; D005241:Feathers / Q000502:physiology; D005246:Feedback; D005260:Female; D008027:Light; D008297:Male; D010507:Periodicity; D010858:Pigmentation; D012098:Reproduction / Q000528:radiation effects*; D012621:Seasons; D013737:Testis / Q000502:physiology*