A ilimin ilimin ilmin halitta, ƙaura mai nisa na ƙananan tsuntsaye ya kasance yanki mai ƙalubale na bincike. Dauki Eurasian Whimbrel (Numenius phaeopus), misali. Yayin da masana kimiyya suka bi diddigin yanayin ƙaura na duniya na ƙaura na manya, suna tara bayanai masu yawa, bayanai game da yara ba su da yawa.
Wani bincike da aka yi a baya ya nuna cewa manya-manyan fulawa suna nuna dabarun ƙaura daban-daban a lokacin kiwo a watan Afrilu da Mayu lokacin da suke tafiya daga wuraren da suke damina zuwa wuraren kiwon su. Wasu suna tashi kai tsaye zuwa Iceland, yayin da wasu suka karya tafiyarsu zuwa kashi biyu tare da tsayawa. Daga baya, daga ƙarshen Yuli zuwa Agusta, yawancin ƙwararrun ƙwanƙwasa suna tashi kai tsaye zuwa wuraren hunturu a Yammacin Afirka. Koyaya, mahimman bayanai game da yara ƙanana-kamar hanyoyin ƙaura da lokacinsu—ya daɗe da zama sirri, musamman lokacin ƙaura ta farko.
A cikin wani binciken da aka yi kwanan nan, ƙungiyar bincike ta Icelandic ta yi amfani da na'urori masu sauƙi guda biyu waɗanda Global Messenger suka kirkira, ƙirar HQBG0804 (4.5g) da HQBG1206 (6g), don saka idanu kan ƙananan yara 13. Sakamakon ya nuna kamanceceniya da bambance-bambance masu ban sha'awa tsakanin matasa da manya a lokacin ƙaura na farko zuwa Afirka ta Yamma.
Kamar manya, yawancin ƙwaƙƙwaran ƙuruciyar matasa sun sami nasarar tashi daga Iceland zuwa Yammacin Afirka. Koyaya, an kuma lura da bambance-bambance daban-daban. Yara kan yi tafiya daga baya a cikin kakar fiye da manya kuma ba su da yuwuwar bin hanyar ƙaura kai tsaye. Maimakon haka, sun fi tsayawa akai-akai akan hanya kuma suna tashi a hankali. Godiya ga masu bin diddigin Global Messenger, tawagar Iceland ta kama, a karon farko, balaguron ƙaura na matasa daga Iceland zuwa Yammacin Afirka, suna ba da bayanai masu kima don fahimtar halayen ƙaura na matasa.
Hoto: Kwatanta tsarin jirgin tsakanin manya da matasa Eurasian whimbrels. Panel a. manya whimbrels, panel b. Yara matasa.
Lokacin aikawa: Dec-06-2024
