Dabba narwhal Dabbar dabba ce wacce take cikin gidan narwhal. Yana cikin tsarin cetaceans. Wannan dabba ce mai matukar ban mamaki. Narwhals suna da daraja saboda kasancewar ƙaho mai tsawo (tusk). Yana da tsayin mita 3 kuma ya fita daidai daga bakin.
Nunin Narwhal da fasali
Babban narwhal ya kai tsawon kusan mita 4.5, kuma ɗan ƙafa ya zama mita 1.5. A wannan yanayin, maza suna auna kimanin tan 1.5, kuma mata - 900 kg. Fiye da rabi na nauyin dabba shine ajiyar mai. A waje, narwhals sunyi kama da belugas.
Wani fasali na narwhal shine kasancewar hazo, wanda galibi ana kiransa ƙaho. Hauren giwa ya kai kimanin kilo 10. Hauren hauren da kansu suna da ƙarfi sosai kuma suna iya lanƙwasa zuwa ga gefen nesa na tsawon 30 cm.
Har zuwa yanzu, ba a yi nazarin ayyukan hauren giwa ba tabbatacce. A baya an ɗauka cewa narwhal yana buƙatar sa don kai hari ga wanda aka azabtar, kuma don dabbar ta kutsa kai ta cikin kankara. Amma kimiyyar zamani ta tabbatar da rashin wannan ka'idar. Akwai ƙarin ra'ayoyi biyu:
Hauren yana taimaka wa maza wajen jan hankalin mata yayin wasannin saduwa, kamar yadda narwhals ke son shafawa hakuransu juna. Kodayake, daidai da wata ka'idar, narwhals suna gogewa da ƙaho don tsabtace su daga ci gaba da ɗakunan ma'adinai daban-daban. Hakanan, ana buƙatar hauren giɓi ga maza yayin gasar wasannin dabbar aure.
Narwhal Tusk - Wannan wata kwayar halitta ce mai matukar damuwa, a saman kanta akwai abubuwan da suke kawo karshen jijiyoyi da yawa, don haka mahanga ta biyu ita ce dabba tana bukatar hakora don sanin yawan zafin ruwan, matsin yanayi, da kuma yanayin karfin lantarki. Ya kuma gargadi dangi game da hatsarin.
Narwhals suna tattare da zagaye kai, ƙananan idanu, babban goshi, ƙaramin baki, wanda yake ƙasa. Inuwar jiki ta ɗan fi inuwa haske. Ciki haske ne. A bayanta da kuma gefen dabbobin akwai wuraren da yawa-launin ruwan kasa-kasa-kasa.
Narwhals ba su da haƙori. Muƙamuƙin sama na sama ne kawai yake da anlages biyu. A cikin maza, tsawon lokaci, haƙori na hagu ya rikide ya zama ƙyama. Yayin da yake girma, sai ya huda lebensa na sama.
Haure-hauren suna jujjuya agogo kuma da ɗan kamannin abin toshewa. Masana kimiyya ba su gano dalilin da ya sa ƙwarin ke girma a gefen hagu ba. Wannan har yanzu ya kasance sirrin da ba za a iya fahimta ba. A cikin al'amuran da ba safai ba, haƙoran narwhal duka na iya canzawa zuwa ƙaho. To zai zama mai ƙaho biyu, kamar yadda aka gani a ciki hoton dabba narwhal.
Hakkin dama a cikin narwhals an ɓoye shi a cikin babban ɗan guminsa kuma ba shi da tasiri a rayuwar dabbar. Koyaya, kimiyya tabbas ta san haka idan teku unicorn narwhal ya karya kahonta, sa'annan rauni a wurin zai zama an matse shi da kashin nama, kuma sabon kaho ba zai yi girma a wurin ba.
Irin waɗannan dabbobi suna ci gaba da rayuwa cikakke ba tare da wata damuwa ba daga rashin ƙaho. Wani fasali dabbar teku narwhal Shin rashin dorsal fin ne Yana iyo tare da taimakon ƙegewayen gefe da wutsiya mai ƙarfi.
Mazaunin Narwhal
Narwhals dabbobi ne na Arctic. Wuri ne mai sanyi wanda ke bayanin kasancewar babban layin kitse mai laushi a cikin waɗannan dabbobin. Wuraren da aka fi so daga waɗannan dabbobi masu shayarwa sune ruwan Tekun Arctic, yankin Kanada Arctic Archipelago da Greenland, kusa da Novaya Zemlya da Franz Josef Land. A lokacin sanyi, ana iya samun su a Tekun Fari da Berengo.
Yanayi da salon rayuwar narwhal
Narwhals mazaunan buɗe ido ne tsakanin kankara. A cikin kaka arctic unicorn narwhals yi ƙaura zuwa kudu Suna samun ramuka a cikin kankara wanda ya rufe ruwa. Dukan garken narwhals suna numfasawa ta cikin waɗannan ramuka. Idan ramin an rufe shi da kankara, to, mazan sukan fasa kankara da kan su. A lokacin rani, dabbobi, akasin haka, suna motsawa zuwa arewa.
Narwhal yana jin dadi sosai a zurfin mita 500. A zurfin teku, narwhal na iya zama ba tare da iska ba na mintina 25. Narwhals dabbobi ne na garke. Suna kirkirar kananan garken tumaki: mutane 6-10 kowannensu. Suna sadarwa tare da sauti, kamar belugas. Makiyan dabbobin Arctic sune kifin kifi da dabbobin polar; sharks na polar na da haɗari ga ɗiya.
Narwhal abinci
Tekun unicorns suna cin abinci akan nau'in kifin mai zurfin teku kamar halibut, polar cod, Arctic cod da redfish. Hakanan suna son cephalopods, squids da crustaceans. Suna farauta a zurfin kilomita 1.
An yi amannar ana amfani da haƙoran aikin narwhal don shayarwa da fita jirgi na ruwa. Wannan yana ba da damar kawar da ganima, kamar kifin kifi ko ƙasan kifi. Narwhals suna da wuyan sassauƙa, wanda ke basu damar bincika manyan yankuna da kuma kame ganima mai motsi.
Sake haifuwa da tsawon rai na narwhal
Sake haifuwa a cikin wadannan dabbobi masu shayarwa sannu a hankali. Suna balaga yayin jima'i lokacin da suka kai shekaru biyar. Ana lura da tazarar shekaru 3 tsakanin haihuwa. Lokacin wasan dabba lokacin bazara. Ciki yana dauke da watanni 15.3. A matsayinka na doka, unicorns na teku suna haihuwar ɗiya ɗaya, da ƙyar sau biyu. Kubiyu suna da girma cikin girma, tsawonsu yakai mita 1.5.
Bayan haihuwa, mata suna haɗuwa zuwa wani garken daban (mutane 10-15). Maza suna rayuwa a cikin garken daban (mutane na 10-12). Ba a san lokacin lactation daidai ga masana kimiyya ba. Amma ana zaton cewa, kamar na belugas, kusan watanni 20 ne. Ruwan ciki yana faruwa ciki zuwa ciki. Kubiyoni an haife su da farko wutsiya.
Narwhal Dabba ce mai son yanci. A cikin 'yanci, ana nuna shi da tsawon rai, kimanin shekaru 55. Ba su zama cikin bauta ba. Narwhal ya fara bushewa kuma ya mutu a cikin 'yan makonni. Matsakaicin tsawon rayuwar narwhal a cikin fursuna ya kasance watanni 4. Narwhals ba su taɓa yin haihuwa a cikin bauta ba.
Don haka, narwhals mazaunan lumana ne masu zaman lafiya, suna ciyar da kifi da kifin kifi. Suna taka rawa a cikin yanayin halittu, kasancewar su masu masaukin irin wadannan dabbobin masu cutar kamar nematodes da whale lice. Waɗannan dabbobi masu shayarwa sun daɗe suna zama babban abincin mutanen Arctic. Yanzu narwhals suna cikin Lissafi kuma doka tana kiyaye su.
