UMary Allen
I-Narwhals idla i-Greenland halibut, i-Arctic kunye ne-polar cod, i-squid kunye ne-shrimp. Benza ukungqungqa kwabo kwincam yomkhenkce nakumanzi asehlotyeni angenamkhenkce.
Zikhangeleka njani iinarwhals?
Olona phawu lubalaseleyo lweenarwhals libamba elide leemitha ezimbini ukuya kwezintathu, ezithwalwa uninzi lweenarwhals, kodwa ngamabhinqa ambalwa kuphela. Iinarwhals zinebunzi elingqukuva, umlomo ongqukuva, akukho mqolomba, kunye namaphiko amafutshane, abuthuntu. Azinawo umlomo ogqamileyo. I-caudal fin inomphetho olandelanayo omile ngendlela ekhethekileyo kangangokuba ikhangeleka ngathi incamathele phezulu. Kunye neebeluga, benza usapho lweminenga ye-goby (Monodontidae).
Bunjani ubomi bakho bemihla ngemihla?
AmaNarwhal ahlala ngokwamaqela abantu aba-10 ukuya kwangama-20, kodwa ebudeni beenyanga zasehlotyeni aqokelelana kumakhulu okanye kwanakumawaka ukuze aqalise ukufuduka kwawo. Zidada ngokusondelelana kwaye zisondele kumphezulu. Ngamanye amaxesha, onke amalungu eqela azakutsiba aphume emanzini aze aphinde angene ngaphakathi kwangaxeshanye. Isizathu sokuziphatha asikaziwa.
Eyona rekhodi inzulu yokuntywila kwe-narwhal yayiyi-1,500m. Bangakwazi ukubamba umoya ukuya kutsho kwimizuzu engama-25.
Zitya ntoni?
Iinarwhals zithanda intlanzi ecaba, icod, ishrimps, iskwidi kunye nonkala, ezizifumana phantsi kolwandle xa zintywila ixesha elide. Basebenzisa i-echolocation ukufumana ukutya kwaye banendlela enomdla yokutya: benza uhlobo lwe-vacuum kwaye bafunxa ukutya kwabo.
Uhlalaphi?
AmaNarwhals ahlala emanzini emantla eArctic Circle, ukuya kuthi ga kumda we-ice sheet, kwaye ahlala efunyanwa kanye kumkhenkce wepakethi. Ehlotyeni zifudukela kufutshane nonxweme lwaseKhanada naseGreenland ukuya kwiindawo ezibandayo, ezinzulu kunye namatheku.
Iintshaba zabo zendalo ziibhere ezimhlophe, ii-orcas, kunye neentlobo ezithile zookrebe. Zazingelwa ngabantu kangangeenkulungwane ngenxa yophondo lwazo lwendlovu.
Ekubeni indawo abahlala kuyo isekupheleni komkhenkce, bachatshazelwa kakhulu kukutshintsha kwemozulu.
Ngaba amarhamncwa enarwhal okanye amaxhoba?
Ifumaneka ikakhulu kumanzi aseCanada aseArctic naseGreenlandic naseRussia, iNarwhal sisitshaba esikhethekileyo esiseArctic. Ebusika, itya ixhoba le-benthic, ubukhulu becala i-flatfish, phantsi komkhenkce oshinyeneyo.
Iinarwhals zikufumana njani ukutya kwazo?
Iinarwhal ziyazithanda iintlanzi ezityalwe, icod, ishrimps kunye nesquid kunye neentlobo ezifana noononkala ezizifumana elwandle ngexesha lokuntywila kwazo ixesha elide. Basebenzisa i-echolocation ukubanceda ukuba bafumane ukutya kwaye babe nendlela yokutya enomdla - ukudala uhlobo lwe-vacuum kunye nokufunxa ukutya kwabo.
Loluphi uphondo lwenarwhal?
Ibamba endaweni yalo libonakala lisetyenziswa njengesixhobo sokubona utshintsho kwimo engqongileyo, njengomahluko kubushushu bamanzi, inqanaba letyuwa, kunye nobukho bexhoba elikufutshane. Izazinzulu zakha zacinga ukuba amabamba e<em>narwhal ayesetyenziselwa ukulwa, kodwa eneneni ii<em>narwhal zikhuhlana iimpondo zazo ukuze zicocwe.
Ngaba iinarwhals ziyayitya ijellyfish?
I-narwhal hoovers up 99-176 lb (45-80 kg) yentlanzi, iiprawns, kunye nejellyfish yonke imihla.
Ngaba iinarwhals zinobuhlobo ebantwini?
Ngelishwa, ii-narwhals zisenokungaxhotyiswanga ukujongana nobudlelwane obusondeleyo obunjalo nabantu. Xa le minenga ijongene neengozi engaziqhelanga, imizimba yayo isabela ngendlela ephazamisayo, abaphandi banikela ingxelo namhlanje kwiSayensi.
Enziwa ngantoni amabamba e<em>narwhal?
Ibamba le<em>narwhal lizinyo elinezigidi zemithambo-luvo. Oko kuthetha ukuba ungayisebenzisa "ukuyiva" okanye ukuyingcamla. Iinarwhals zinamazinyo amabini kwaye kwindoda izinyo lasekhohlo lidla ngokwenza ibamba. Ezinye zinamabamba amabini, kwaye malunga nesithathu ekhulwini seenarwhals zamabhinqa nazo zinebamba elinye.