The influence of exteroceptive factors on the estrous cycle of the collared lemming (Dicrostonyx groenlandicus).
D000311:Adrenal Glands / Q000033:anatomy & histology; D000818:Animals; D004031:Diestrus; D004032:Diet; D004971:Estrus; D005260:Female; D006799:Housing, Animal; D008027:Light; D009929:Organ Size; D010053:Ovary / Q000033:anatomy & histology; D011247:Pregnancy; D012377:Rodentia; D012726:Sexual Behavior, Animal; D012931:Social Environment; D014599:Uterus / Q000033:anatomy & histology; D014626:Vaginal Smears