title: [Seasonal changes in the size of testis and vocalization in pikas as a confirmation of hormonal control for acoustic behavior in mammals].
authors.forename: A A
authors.initials: AA
authors.lastname: Nikol'skiĭ
authors.forename: T D
authors.initials: TD
authors.lastname: Mukhamediev
authors.forename: E B
authors.initials: EB
authors.lastname: Srebrodol'skaia
mesh_terms: D000818:Animals; D007793:Lagomorpha / Q000033:anatomy & histology / Q000502:physiology*; D008297:Male; D012621:Seasons; D013737:Testis / Q000033:anatomy & histology*; D013739:Testosterone / Q000502:physiology*; D014828:Vocalization, Animal / Q000502:physiology*
chemical_list: D013739:Testosterone