Ka taƙaita labarin:  Wani kifin whale na yamma ya yi ƙaura mafi tsawo da aka sani da kowane dabba mai shayarwa. Mace, mai suna Varvara, ta yi nisan mil 14,000 (22,500km) daga gabar gabashin Rasha zuwa wuraren kiwo a gabar tekun Mexico, da dawowa, ba tare da tsayawa don cin abinci ba lokacin da take 'yar shekara tara. Tafiya ta dawowa ta Arewacin Pacific ta tayar da tambayoyi game da yanayin kiyaye halittar da ke cikin haɗari. Wani kifin whale na yamma (hoton) ya yi ƙaura mafi tsawo da aka sani ta kowane dabba mai shayarwa. Mace, mai suna Varvara, ta yi iyo mil 14,000 (22,500) daga gabar gabashin Rasha zuwa wuraren kiwo a gabar tekun Mexico, kuma ta dawo, an ba da rahoton ba tare da tsayawa don abun ciye-ciye ba. Har zuwa yanzu, masana kimiyya sun yi imanin cewa akwai rukuni biyu na whale mai launin toka - whale mai launin toka na gabas, wanda ke tafiya a gefen gabar yammacin Amurka, da kuma whale mai launin toka na yamma, wanda ke tafiya a gefen gabar gabashin Asiya. Masu binciken sun yi amfani da alamun saka idanu na tauraron dan adam don bin diddigin manyan kifi uku na yammacin Arewacin Pacific daga wuraren da suke cin abinci na farko daga Tsibirin Sakhalin na Rasha a fadin Tekun Pacific da kuma gabar tekun yammacin Amurka zuwa Baja, Mexico. Masana sun kasance suna lura da nau'in da ke rayuwa a gabar tekun Rasha na tsawon shekaru kuma sun bi diddigin tafiyar rikodin sama da watanni biyar da rabi tsakanin 2011 da 2012. Whales masu launin toka ba sa cin abinci yayin ƙaura, wanda ya sa masu bincike suka yi imanin cewa Varvara bai ci abinci ba a lokacin doguwar tafiya. Sun gano cewa Varvara, wanda shine Rasha don Barbara, ya ziyarci manyan yankuna uku na kiwo na whale na Gabas, wanda aka samo a Arewacin Amirka, bisa ga binciken da Royal Society ta wallafa a cikin mujallar Biology Letters. Tafiya ta dawowa ta Arewacin Pacific ta tayar da tambayoyi game da yanayin kiyaye halittar da ke cikin haɗari. Masana sun kasance suna lura da nau'in da ke rayuwa a gabar tekun Rasha na shekaru da yawa kuma sun bi hanyar da aka yi rikodin rikodin tsakanin 2011 da 2012. An nuna wani whale na yammacin yamma. <unk>Yana da ban sha'awa sosai,<unk> Farfesa Bruce Mate, na...
An yi wa raƙuman raƙuman raƙuman raƙuman raƙuman raƙuman raƙuman shekaru bakwai da suka gabata don lura da ƙaura. Mace mai shekaru tara da haihuwa mai suna Varvara ta yi iyo daga Rasha zuwa wuraren kiwo kusa da Mexico a cikin watanni biyar da rabi a shekara ta 2011. Whales masu launin toka ba sa cin abinci a lokacin ƙaura, wanda ya sa masu bincike suka yi imanin cewa ba ta ci ba a lokacin doguwar tafiya. Rikodin da ya gabata ya kasance na wani humpback wanda ya yi ninkaya mil 11,706 a 2011.