<prompt> Ruvara rwemaneya rwunosiyana uye rwunosviba nezera; tsvakurudzo inoratidza kuti ruvara rwayo uye saizi zvinokanganiswa nezvinhu zvakatipoteredza zvakadai seavhareji tembiricha yemhepo. Kureba kwemaneya kunoratidzika kunge kunoratidza kubudirira kurwisa muhukama hwevarume nevakadzi; vanhu vane maneya akasviba vanogona kunge vaine hupenyu hurefu hwekubereka uye kurarama kwevana kwakakwirira, kunyangwe vachitambura mumwedzi inopisa yegore. Kuvapo, kusavapo, ruvara uye saizi yemaneya zvine hukama ne genetiki, kukura kwepabonde, mamiriro ekunze uye kugadzirwa kwe testosterone; mutemo wegunwe ndewekuti maneya yakasviba, izere maneya inoratidza mhuka ine hutano. MuSerengeti National Park, shumba dzechirume dzine maneya akawandisa, sevakaroorana. Chinangwa chikuru chekuchengetedzwa kwemaneya inofungidzirwa kuve yekurwisa mhuka uye nzvimbo dzisina tembiricha yekunze.  <response>: Nzvimbo inotonhorera 