Saizi yakakosha: madhadha echando anogara kwenguva refu uye anoshandisa nzvimbo shoma pamadziva makuru eChinese.

Journal:Avian Research, 10(1), pp.1-8.

Zvisikwa(Avian):Eurasian wigeon (Mareca penelope), Falcated duck (Mareca falcata), Northern pintail (Anas acuta)

Abstract:

Humbowo hunoratidza kuti shiri dzemumvura dzemuchando dzave kunyanya kunyura mumadziva maviri makuru eRwizi rweYangtze Floodplain, East Dong Ting Lake (Purovhinzi yeHunan, 29°20′N, 113°E) nePoyang Lake (Purovhinzi yeJiangxi, 29°N, 116°20′E), zvisinei nedzimwe nzvimbo dzakachengeterwa madziva. Kunyange zvazvo hukama uhu huchigona kunge huchikonzerwa nekuwanda kwenzvimbo dzekugara dzisina kukanganiswa mumadhamu akakura, tinonzwisisa zvishoma zvevatyairi vari kukanganisa maitiro emunhu ari seri kwemaitiro aya. Takaronda mafambiro emuchando emarudzi matatu edhadha (Eurasian Wigeon Mareca penelope, Falcated Duck M. falcata neNorthern Pintail Anas acuta) tichishandisa GPS transmitters, tichiongorora misiyano pakati pemadziva makuru maviri nemamwe madhadha madiki ari munzvimbo dzemadhadha, nguva yekugara padhamu rega rega uye shiri dzemazuva ese dzichifambiswa neshiri dzemazuva ese. Eurasian Wigeon uye Falcated Duck yakagara zvakapetwa kashanu uye yakada kushandiswa chete marudzi enzvimbo dzekugara pamadziva maviri makuru (91‒95% yezvinzvimbo) zvichienzaniswa nekureba kwenguva yekugara mumadziva madiki, uko vakapedza mazuva 28‒33 paavhareji (kunze kwenzvimbo yekutapa) uye vakabira akawanda akawanda %0 nzvimbo dzekunze (5). Kudzidza kwedu ndiko kwekutanga kuratidza kuti hurefu hupfupi hwekugara uye kushandiswa kwakasiyana-siyana kwekugara nemadhadha kumadziva madiki kunogona kubatsira pakutsanangura kuoneka kwenhamba yenhamba dziripo dzeidzi nedzimwe mhuka pamadziva makuru mumakore achangopfuura. Ikoku kunoenzaniswa nokuwanda kwavo kuri kudzikira mumadziva maduku, uko kurashikirwa nepekugara uye kuparara kwave kuchioneka zvikuru kupfuura pamadziva makuru.