Mayendedwe apachaka a Far East Greylag Geese (Anser anser rubrirostris) amawululidwa ndi kutsatira GPS.

Magazini:Integrative zoology, 15 (3), pp.213-223.

Mitundu (Avian):Tsekwe wa Greylag kapena tsekwe wa graylag (Anser anser)

Chidule:

20 Far East Greylag Geese, Anser anser rubrirostris, anagwidwa ndi kuikidwa odula mitengo a Global Positioning System/Global System for Mobile Communications (GPS/GSM) kuti azindikire madera oswana ndi nyengo yozizira, mayendedwe osamukira ndi malo oimirira. Deta ya Telemetry kwa nthawi yoyamba idawonetsa kulumikizana pakati pa madera awo nyengo yozizira ya Mtsinje wa Yangtze, malo oima kumpoto chakum'mawa kwa China, ndi malo oswana/kusungunula kummawa kwa Mongolia ndi kumpoto chakum'mawa kwa China. 10 mwa anthu 20 omwe ali ndi ma tag adapereka chidziwitso chokwanira. Anayima posamukira ku Yellow River Estuary, Beidagang Reservoir ndi Xar Moron River, kutsimikizira maderawa kukhala malo ofunikira oimirirapo kwa anthuwa. Nthawi yapakati yosamukira ku masika inali masiku 33.7 (anthu anayamba kusamuka pakati pa 25 February ndi 16 March ndipo anamaliza kusamuka kuchokera pa 1 mpaka 9 April) poyerekeza ndi masiku 52.7 m'dzinja (26 September-13 October mpaka 4 November-11 December). Kutalika kwa nthawi yoyima kwapakati kunali 31.1 ndi masiku 51.3 ndipo liwiro lapakati paulendo linali 62.6 ndi 47.9 km/tsiku pakusamuka kwa masika ndi autumn, motsatana. Kusiyana kwakukulu pakati pa kusamuka kwa masika ndi autumn pa nthawi yakusamuka, nthawi yoyima ndi liwiro la kusamuka kunatsimikizira kuti atsekwe achikulire a Greylag amayenda mofulumira m'nyengo ya masika kusiyana ndi autumn, kuchirikiza lingaliro lakuti ayenera kukhala ndi nthawi yochepa pa kusamuka kwa masika.