A fannin ilmin tsuntsaye, ƙaura mai nisa na tsuntsayen da ke yin nisa ya kasance wani fanni mai ƙalubale na bincike. Yi la'akari da Eurasian Whimbrel (Numenius phaeopus), misali. Duk da cewa masana kimiyya sun bi diddigin yanayin ƙaura a duniya na manyan mutane, suna tara tarin bayanai, bayanai game da yara ƙanana sun yi karanci sosai.
Nazarin da aka yi a baya ya nuna cewa manyan tsuntsaye suna nuna dabarun ƙaura daban-daban a lokacin kiwo a watan Afrilu da Mayu lokacin da suke tafiya daga wuraren hunturu zuwa wuraren kiwo. Wasu suna tashi kai tsaye zuwa Iceland, yayin da wasu kuma ke raba tafiyarsu zuwa sassa biyu tare da tsayawa. Daga baya, daga ƙarshen Yuli zuwa Agusta, yawancin manyan tsuntsaye suna tashi kai tsaye zuwa wuraren hunturu a Yammacin Afirka. Duk da haka, bayanai masu mahimmanci game da ƙananan yara - kamar hanyoyin ƙaura da lokacinsu - sun daɗe suna zama abin asiri, musamman a lokacin ƙaura ta farko.
A wani bincike da aka yi kwanan nan, wata ƙungiyar bincike ta Iceland ta yi amfani da na'urori biyu masu sauƙi na bin diddigin abubuwa waɗanda Global Messenger ta ƙirƙiro, samfurin HQBG0804 (4.5g) da HQBG1206 (6g), don sa ido kan ƙananan yara 13. Sakamakon ya nuna kamanceceniya da bambance-bambance masu ban sha'awa tsakanin ƙananan yara da manya a lokacin ƙaurarsu ta farko zuwa Yammacin Afirka.
Kamar manya, yawancin matasan da ke tafiya a hankali sun sami nasarar tashi ba tare da tsayawa ba daga Iceland zuwa Yammacin Afirka. Duk da haka, an lura da bambance-bambance daban-daban. Matasa galibi suna tafiya daga baya a kakar wasa fiye da manya kuma ba sa bin hanyar ƙaura kai tsaye. Madadin haka, suna tsayawa akai-akai a kan hanya kuma suna tashi a hankali. Godiya ga masu bin diddigin Global Messenger, ƙungiyar Icelandic ta kama, a karon farko, tafiyar ƙaura ta matasa daga Iceland zuwa Yammacin Afirka, tana ba da bayanai masu mahimmanci don fahimtar ɗabi'ar ƙaura ta matasa.
Hoto: Kwatanta yanayin tashi tsakanin manya da yara ƙanana na Eurasia.. manya masu wayo, panel b. Matasa.
Lokacin Saƙo: Disamba-06-2024
