title: Physiological development of cockerels as influenced by selected wavelengths of environmental light.
mesh_terms: D000311:Adrenal Glands / Q000033:anatomy & histology; D000818:Animals; D001835:Body Weight; D002645:Chickens / Q000254:growth & development*; D003129:Comb and Wattles / Q000032:analysis / Q000033:anatomy & histology; D003624:Darkness; D004780:Environment, Controlled; D004781:Environmental Exposure; D008027:Light; D008297:Male; D009929:Organ Size; D010902:Pituitary Gland / Q000033:anatomy & histology; D013737:Testis / Q000033:anatomy & histology