Ubude bexesha lokufuduka kwentwasa hlobo lidlula elo lemfuduko yasekwindla eFar East Asian Greater White-fronted Geese (Anser albifrons).

Ijenali:UPhando lweeAvian, 10 (1), p.19.

Iintlobo (Intaka):Amarhanisi aMhlophe Amakhulu angaphambili (Anser albifrons)

Inkcazo:

Ithiyori yokufuduka icebisa, kunye nophononongo olunobungqina obubonisa ukuba, ukuze kukhuphisane ngezona ndawo zibalaseleyo zokuzala kunye nokwandisa impumelelo yokuzala, abafuduki beentaka ezihlala umgama omde badla ngokuthatha isicwangciso sokunciphisa ixesha ngexesha lokufuduka kwentwasahlobo, okukhokelela kwixesha elifutshane lokufuduka kwentwasahlobo xa kuthelekiswa naleyo ekwindla. Ukusebenzisa i-GPS / i-GSM transmitters, silandelele ukufuduka okupheleleyo kwe-11 Greater White-fronted Geese (Anser albifrons) phakathi kwe-China-mpuma ye-China kunye ne-Arctic yaseRashiya, ukuveza ixesha lokufuduka kunye neendlela zabemi base-East Asia, kwaye uthelekise umahluko phakathi kwexesha phakathi kwentwasahlobo kunye ne-autumn imfuduko yaba bantu. Sifumanise ukuba ukufuduka entwasahlobo (iintsuku ezingama-79 ± 12) kuthathe ixesha eliphindwe kabini ukugubungela umgama ofanayo nowasekwindla (iintsuku ezingama-35 ± 7). Lo mahluko kubude bexesha lokufuduka umiselwe ikakhulu lixesha elininzi elichithwe entlakohlaza (iintsuku ezingama-59 ± 16) kunasekwindla (iintsuku ezingama-23 ± 6) kwiindawo ezininzi zokumisa. Sicebisa ukuba la marhanisi, ekucingelwa ukuba angabafuyi abayinkunzi abayinxenye, achithe phantse ikota ezintathu zexesha lilonke lokufuduka kwiindawo zokumisa intwasahlobo ukuze afumane iivenkile zamandla otyalo-mali lokugqibela ekuveliseni, nangona singenako ukuyikhaba ingqikelelo yokuba ixesha lokunyibilika kwentwasahlobo nalo libe negalelo kwixesha lokuyeka. Ekwindla, bafumana iivenkile zamandla eziyimfuneko kwimihlaba yokuzala eyaneleyo ukufikelela kwiindawo zokuma kuMntla-mpuma weTshayina phantse ngaphandle kokuyeka, nto leyo eyanciphisa amaxesha okumisa ekwindla kwaye yakhokelela ekufudukeni ngokukhawuleza kwekwindla kunentwasahlobo.