title: Development of photorefractoriness in willow ptarmigan (Lagopus lagopus lagopus) and red grouse (Lagopus lagopus scoticus) exposed to different photoperiods.
mesh_terms: D000818:Animals; D001717:Birds / Q000502:physiology*; D003129:Comb and Wattles / Q000033:anatomy & histology; D007700:Kinetics; D008027:Light; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D010507:Periodicity; D012098:Reproduction / Q000528:radiation effects*; D013739:Testosterone / Q000097:blood
chemical_list: D013739:Testosterone; D007986:Luteinizing Hormone