Mary Allen
Narwhals suna cin abinci a Greenland halibut, Arctic da polar cod, squid, da shrimp. Suna yin ƙulle-ƙulle a bakin ƙanƙara da kuma cikin ruwan rani mara ƙanƙara.
Menene kamannin narwhals?
Mafi shaharar halayen narwhals ita ce haƙori mai tsayin mita biyu zuwa uku, wanda yawancin narwhals na maza ke ɗauka, amma kaɗan ne kawai mata. Narwhals suna da goshi mai siffar zagaye, zagayen baki, babu ƙoƙon ƙwanƙwasa, da gajere, fins ɗin ɓangarorin ƙwaya. Ba su da baki mai fitowa. Ƙarfin caudal yana da wani gefuna mai siffa ta musamman wanda ya yi kama da an haɗe shi sama da ƙasa. Tare da belugas, sun zama dangin goby whales (Monodontidae).
Yaya rayuwar ku ta yau da kullun take?
Narwhals suna rayuwa ne a rukuni na mutane 10 zuwa 20, amma a cikin watannin bazara suna taruwa cikin ɗaruruwa ko ma dubbai don fara ƙaura. Suna iyo kusa da juna kuma kusa da saman. Wani lokaci, duk membobin ƙungiyar za su yi tsalle daga cikin ruwa kuma su koma ciki a lokaci guda. Har yanzu ba a san dalilin wannan hali ba.
Zurfin da aka yi rikodin narwhal ya kasance 1,500m. Suna iya riƙe numfashin su har zuwa mintuna 25.
Me suke ci?
Narwhals sun fi son kifin kifi, cod, shrimp, squid da kaguwa, waɗanda suke samu a kan tekun yayin da suke nitsewa. Suna amfani da ecolocation don nemo abinci kuma suna da hanyar ciyarwa mai ban sha'awa: suna haifar da wani yanayi kuma suna tsotse abincinsu.
Ina kike zama?
Narwhals suna zaune a cikin ruwaye na arewacin Arctic Circle, har zuwa gefen takardar kankara, kuma galibi ana samun su daidai akan fakitin kankara. A lokacin rani suna ƙaura kusa da bakin tekun Kanada da Greenland cikin sanyi, zurfin fjords da bays.
Maƙiyansu na dabi'a sune berayen polar, orcas, da wasu nau'ikan sharks. Mutane sun yi ta farautarsu tsawon shekaru aru-aru don hauren giwa.
Tunda mazauninsu yana gefen kankara, sauyin yanayi ya shafe su musamman.
Shin maharan narwhal ne ko ganima?
An samo shi da farko a cikin ruwan Arctic na Kanada da Greenlandic da ruwan Rasha, narwhal ƙwararren mafarauci ne na Arctic na musamman. A cikin hunturu, yana ciyar da ganima na benthic, galibi flatfish, ƙarƙashin fakitin kankara.
Ta yaya narwhals suke samun abincinsu?
Narwhals suna sha'awar kifin kifi, cod, shrimp da squid da nau'ikan nau'ikan kaguwa waɗanda suke samu akan gaɓar teku yayin dogon nutsewarsu. Suna amfani da ecolocation don taimaka musu su sami abinci kuma su sami hanyar cin abinci mai ban sha'awa - ƙirƙirar wani nau'i na vacuum da tsotsar abincin su.
Menene ƙahon narwhal ga?
A maimakon haka da alama ana amfani da haƙori azaman kayan aiki don gano canje-canje a cikin muhalli, kamar bambance-bambancen zafin ruwa, matakin gishiri, da kasancewar ganima kusa. Masana kimiyya sun taɓa tunanin cewa ana amfani da haƙarƙarin narwhal don faɗa, amma narwhals a zahiri suna shafa ƙahonin juna don tsaftacewa.
Shin narwhals suna cin jellyfish?
Narwhal yana hawa 99-176 lb (45-80 kg) na kifi, prawns, da jellyfish kowace rana.
Shin narwhals suna abokantaka da mutane?
Abin takaici, narwhals na iya zama ba su da kayan aiki don tuntuɓar irin wannan kusanci da mutane. Lokacin da waɗannan whales suka fuskanci haɗari waɗanda ba su saba da su ba, jikinsu yana amsawa ta hanya mai ban tsoro, masu bincike sun ruwaito a yau a cikin Kimiyya.
Me ake yi na narwhal tururuwa?
Haƙorin narwhal haƙori ne mai miliyoyin ƙarshen jijiya. Wannan yana nufin za ku iya amfani da shi don "ji" ko dandana shi. Narwhals suna da hakora biyu kuma a cikin maza haƙoran hagu yakan zama haƙori. Wasu suna da hatso guda biyu, kuma kusan kashi uku na narwhal na mata suma suna da hatso guda.