title: Frequency of activity and endocrine response among male house mice (Mus musculus) in freely growing populations.
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D005837:Genitalia, Male / Q000033:anatomy & histology*; D008297:Male; D051379:Mice; D009043:Motor Activity; D009929:Organ Size; D010413:Penis / Q000033:anatomy & histology; D011158:Population Growth; D012669:Seminal Vesicles / Q000033:anatomy & histology; D013737:Testis / Q000033:anatomy & histology