Journal:Avian Research, 10(1), p.19.
Zvisikwa(Avian):Greater White-fronted Geese (Anser albifrons)
Abstract:
Dzidziso yekutama inoratidzira, uye zvimwe zvidzidzo zvehunyanzvi zvinoratidza, kuti kuitira kukwikwidza nzvimbo dzakanakisa dzekuberekesa uye kuwedzera kubudirira kwekubereka, vanoenda kure kure neavian vanotamira kune vanotora nzira yekuderedza nguva panguva yekutama kwechirimo, zvichikonzera kupfupika kwekufamba kwechirimo zvichienzaniswa neiyo mumatsutso. Tichishandisa GPS/GSM transmitters, takaronda kutama kuzere kwegumi neimwe Greater White-fronted Geese (Anser albifrons) pakati pemaodzanyemba kwakadziva kumabvazuva kweChina neRussia Arctic, kuratidza nguva yekutama uye nzira dzehuwandu hweEast Asia, uye kuenzanisa mutsauko wenguva pakati pechirimo nekumatsutso kutama kwehuwandu uhwu. Takaona kuti kutama muchirimo (79 ± 12 mazuva) kwakatora kanopfuura kaviri kureba kuvhara chinhambwe chakafanana nechirimo (35 ± 7 mazuva). Musiyano uyu mukufamba kwenguva wainyanya kutariswa nenguva yakawandisa yaishandiswa muchirimo (59 ± 16 mazuva) kupfuura mumatsutso (23 ± 6 mazuva) panzvimbo dzakanyanya kumira. Isu tinopa zano kuti maganzi aya, anofungidzirwa kuti ane chikamu chevapfuri vemari, akashandisa zvikamu zvitatu muzvina zvenguva yakazara yekutama panzvimbo dzekumira kwechirimo kuti vawane zvitoro zvemagetsi ekupedzisira mari mukubereka, kunyangwe isu tisingakwanise kuramba fungidziro yekuti nguva yekunyungudika kwechirimo yakabatsirawo pakumira kwenguva. Mumatsutso, vakawana zvitoro zvemagetsi zvinodikanwa panzvimbo yekuberekesa zvakaringana kuti vasvike kuchamhembe kwakadziva kumabvazuva kweChina nzvimbo dzekutandarira dzinenge dzisina kumira, izvo zvakaderedza nguva dzekumira mumatsutso uye zvakakonzera kukurumidza kwematsutso kutama kupfuura muchirimo.
ZVINYORWA ZVIRIPO PA:
https://doi.org/10.1186/s40657-019-0157-6
