Jarida:Binciken Avian, 10 (1), shafi 19.
Nau'o'i (Avian):Babban Farin Gaban Geese (Anser albifrons)
Takaitawa:
Ka'idar ƙaura ta nuna, kuma wasu bincike na ƙwaƙƙwara sun nuna, don yin gasa don mafi kyawun wuraren kiwo da kuma ƙara samun nasarar haifuwa, bakin haure masu nisa na nesa suna ɗaukar dabarun rage lokaci yayin ƙauran bazara, wanda ke haifar da ƙaura na lokacin bazara idan aka kwatanta da wancan a cikin kaka. Ta hanyar amfani da masu watsa GPS/GSM, mun bibiyi cikakken ƙaura na 11 Greater White-fronted Geese (Anser albifrons) tsakanin kudu maso gabashin China da Arctic na Rasha, don bayyana lokacin ƙaura da hanyoyin mutanen gabashin Asiya, da kwatanta bambancin tsawon lokacin ƙaura na bazara da kaka na wannan yawan. Mun gano cewa ƙaura a cikin bazara (79 ± 12 kwanaki) ya ɗauki fiye da sau biyu tsawon tsayi don rufe wannan nisa kamar a cikin kaka (35 ± 7 kwanaki). Wannan bambance-bambancen tsawon lokacin ƙaura an ƙaddara shi ta hanyar ƙarin lokacin da aka kashe a cikin bazara (59 ± 16 kwanaki) fiye da a cikin kaka (23 ± 6 kwanakin) a mahimman wuraren tsayawa. Muna ba da shawarar cewa waɗannan geese, waɗanda ake tunanin su masu kiwo ne na ɗan kasuwa, sun kashe kusan kashi uku cikin huɗu na jimlar lokacin ƙaura a wuraren da ake tsayawa bazara don samun shagunan makamashi don saka hannun jari na ƙarshe a haifuwa, kodayake ba za mu iya watsi da hasashen cewa lokacin narkewar bazara shima ya ba da gudummawar tsayawa tsayin daka. A cikin kaka, sun sami ma'ajin makamashi masu mahimmanci a wuraren kiwo wanda ya isa ya isa yankin arewa maso gabashin China kusan ba tare da tsayawa ba, wanda ya rage lokacin tsayawa a cikin kaka kuma ya haifar da gudun hijirar kaka da sauri fiye da bazara.
ANA BUGA A NAN:
doi.org/10.1186/s40657-019-0157-6
