Journal:Mvura Yakachena Biology, 64 (6), pp.1183-1195.
Zvisikwa(Avian):Hanzi bhinzi (Anser fabalis), Hanzi chena-mberi (Anser erythropus)
Abstract:
Kukwidziridzwa kwechinjo yezvakatipoteredza kunoitwa nevanhu kunopa dambudziko rakakura kumhuka dzesango. Kugona kwemhuka dzesango kujairana nekuchinja kwezvakatipoteredza kune mhedzisiro yakakosha pakusimba kwavo, kurarama, uye kubereka. Behavioral flexibility, kugadziriswa kwekukurumidza kwemaitiro mukupindura kushanduka kwezvakatipoteredza, zvingave zvakakosha pakugadzirisa kuchinja kweanthropogenic. Chinangwa chikuru chechidzidzo ichi chaive chekuyera mhinduro yemhando mbiri dzehanzi dzemuchando (bhinzi Anser fabalis uye hanzi chena-mberi Anser erythropus) kumamiriro ekugara asina kunaka pahuwandu hwevanhu nekudzidza maitiro ekudya. Uye zvakare, isu takaedza kana maitiro epurasitiki anogona kuchinja trophic niche. Takaratidza maitiro ekutsvaga chikafu uye takaverengera zuva rega rega renji (HR) yehanzi tichishandisa global positioning system yekutevera data. Takaverenga nzvimbo dze ellipse kuti tiverenge hupamhi hwe niche tichishandisa δ13C uye δ15N tsika dzehanzi. Isu takabatanidza hunhu hwepurasitiki nehunhu hwekugara tichishandisa ANCOVA (analysis of covariance) modhi. Isu takaedza zvakare kuwirirana pakati peyakajairwa ellipse nzvimbo uye HR tichishandisa ANCOVA modhi. Takawana misiyano mikuru mumafambiro ekudya kwegezi pakati pemakore munzvimbo yavo yemazuva ese yekudya, chinhambwe chekufamba uye kumhanya, uye kona yekutendeuka. Kunyanya, shiri dzakawedzera nzvimbo yadzo yekudyira kuti dzigutse simba radzo remazuva ese mukupindura kune hurombo hwekugara. Vaibhururuka zvakanyanya uye vaifamba nzendo dzinokurumidza uye refu zuva nezuva. Kune iri mungozi yekutsakatika chena-kumberi hanzi, ese mafambiro akasiyana aisanganiswa nehunhu hwekugara. Kune bhinzi hanzi, chete HR uye kona yekutendeuka yaienderana nemhando yekugara. Shiri idzi, kunyanya hanzi dzine jena-kumberi zvishoma, dzinogona kunge dzakange dziine nzvimbo yepamusoro pasi pemamiriro asina kunaka. Zvatakawana zvinoratidza kuti nguva yechando geese yakaratidza mwero wepamusoro wehunhu hwepurasitiki. Zvakadaro, kushingaira kwekudyara maitiro pasi pemamiriro ekugara asina kunaka haana kutungamira kune yakakura trophic niche. Kuwanikwa kweHabitat kunogona kuve nehany'a kune mhinduro dzakasiyana dzekutsvaga HR uye isotopic niche kune-inokonzeresa nharaunda shanduko. Naizvozvo, kuchengetedza hutongi hwemvura panguva yakaoma (kureva Gunyana-Mbudzi) kuve nechokwadi chekuti zvekudya zvemhando yepamusoro zviripo ndizvo zviri pakati peremangwana rehuwandu hwehanzi mukati meEast Asian-Australasian Flyway.
ZVINYORWA ZVIRIPO PA:
https://doi.org/10.1111/fwb.13294
