A mazauninsu na iyakacin duniya bear. Ina da iyakacin duniya bears?

Iyakacin duniya, ko na iyakacin duniya bear ne kawai daya wanda aka classified a mafi yawan kasashen (Amurka, Norway, Greenland da kuma Rasha) a matsayin marine dabbobi masu shayarwa. A togiya ne Canada, wanda yanzu classifies da iyakacin duniya bear don nazarin sasannin dabbobi masu shayarwa. Iyakacin duniya bears ne a saman da abinci sarkar a cikin Arctic, inda suka ciyar, yafi a like.

Su wane ne iyakacin duniya bears?

Bisa ga latest cewar da yawa karatu, da kakaninmu na iyakacin duniya Bears ne da launin ruwan kasa bear. Su asalin Dates baya ga lokaci na game da 350 dubu 6 shekaru miliyan da suka wuce. Ba kamar su ruwan kasa uwan cewa rayuwa a ƙasar, na iyakacin duniya Bears suna daidai saba rayuwa a cikin Arctic tekuna na Far Arewa. Akwai daban-daban alƙarya na iyakacin duniya Bears. Akwai 19 iri daban-daban subpopulations na iyakacin duniya Bears. Kamar yadda mafi kwanan nan karatu, akwai huɗu da babban kungiyoyin. Wannan rarrabuwa daukan kamar yadda ta da asali a wuri na musamman inda iyakacin duniya bears: kankara bamban, convergent kankara, yanayi kankara da kuma archipelagos.

Iyakacin duniya bear - shi ne mafi kusa zumunta na launin ruwan kasa bear. Adult maza yawanci auna daga 350 zuwa 600 kilo. Adult mace karami - yawanci su nauyi ne daga 150 zuwa 295 kilo. Iyakacin duniya bears suna dauke su dogon-rayu. A cikin daji, suka zama wani talakawan of 15 zuwa shekaru 18, ko da yake masana halittu suka rubuta wasu 30-shekara tsufa. A zaman talala, wasu dogon-rayu bears isa shekaru 40 da haihuwa. A karin misalin wannan da aka girma cikin bauta Medved Debbi daga Canada, wanda ya rayu a shekaru 42.

Ina iyakacin duniya bears?

A mazauninsu na iyakacin duniya bear - shi ne da halitta yanayi, inda ya iya farautar nasu abincin, ku kuma riɓaɓɓanya, gina snow dajin ga rashin himma da kuma kare su matasa. Iyakacin duniya bears ake samu a ko'ina a cikin Arctic. Su sau da yawa rayuwa a wuraren da jama'ar na ringed hatimi da aka samu. A mazauninsu na iyakacin duniya bear maida hankali ne akan dukan circumpolar Arctic.

Wadannan manyan dabbobi masu shayarwa sun saba da rayuwa a cikin ruwa da kuma a kan ƙasar. Ba kamar sauran beyar, da iyakacin duniya bear ne mai kyau Dan wasan ninkaya, da kuma wani lokacin za su iya a gani fiye da 160 kilomita daga ƙasar, ko kankara. A halin yanzu, fiye da kashi 40 na duk iyakacin duniya bears rayuwa a arewacin Canada, a kan kankara tare da gaba na da yawa tsibirin.

Da barazana da nau'i nau'i

Iyakacin duniya bears suna dauke su quite m jinsunan cikin sharuddan nau'i nau'i. A Rasha, da dabbobi da aka jera a cikin Red Littãfi, wanda ya hada da rare ko miyagun dabbobi. A Amurka, da fari bear matsayin barazana jinsunan da aka jera a cikin jerin "namun dajin". Canada ta yi imanin cewa sun bukatar kulawa ta musamman a cikin kasa jinsunan miyagun. dabba kariya matakan dauka a majalisu matakin.

A dalilan da damuwa ne da asarar mazauninsu, saboda canjin yanayi. Masana kimiyya hasashen cewa saboda m narkewa na kankara kashi biyu cikin uku na duniya yawan iyakacin duniya bears iya bace a cikin wannan karni. A binciken ya kuma nuna cewa har yanzu akwai fixable, idan a nan gaba za a dauka don rage greenhouse gas watsi. A wuri inda iyakacin duniya bears kamata ba zama datti saboda da kasuwanci amfani da Arctic.

Iyakacin duniya bears: mazauninsu

Bears maida shi musamman domin Arctic sauyin yanayi, inda hunturu da zazzabi iya sauke saukar zuwa -45º C. Wadannan dabbobi sun ware biyu Jawo Layer, wanda taimaka su ga riƙe jiki kadan. Bugu da kari, a cikin mai kyau sau su ma suna da wani lokacin farin ciki Layer na mai. Karamin kananan kunnuwa da wutsiya kuma hana kadan hasãra. A gaskiya, na iyakacin duniya take ɗauke da karin matsalolin da zafi fiye da kima fiye da daga sanyi, musamman a lokacin da guje. Hunt yana taimaka musu wajen girma a ji na wari, kuma su fika iya ci gaba da samar a cikin 40-90 kg.

Wajen wani iyakacin duniya bear a cikin abinci sarkar

Mazauninsu na wadannan furry da yara ne Arctic jeji. White Bear a saman na Arctic abinci sarkar. Kamar wancan da na halitta balance aka samu domin hana overcrowding mazauninsu. Lokacin da ya fara tasawa bear a siffar, kafa ta jiki mai Stores aka samu a tsakanin abinci.

Yanã farauta ringed like, bearded like, baleen Whales. Wadannan fari da kuma Fluffy dabbobi masu shayarwa suna da kyau swimmers: su yi amfani da su gaban paws kamar oars yayin da Hind kafafu aiki a matsayin mai rada. Bugu da kari, suna da wata gagarumar ma'ana na wari: su ganima, su iya jin warin, a nesa na daya kilometer.

zurriyar

Dangane da yanayin jiki, da mace yawanci haifa a cikin haske na biyu ko uku kwiyakwiyanta kowane 4-6 shekaru. A wannan connection, da iyakacin duniya bears ne daya daga cikin slowest haihuwa sake zagayowar a cikin yanayi, kawo zuriyarsa, yawanci ba fiye da sau biyar a rayuwa. A mazauninsu na iyakacin duniya bear sa ya yiwu a zabi wani m tsari ga calving. A kwiyakwiyanta an haife shi a watan Nuwamba ko Disamba a snow kogwanni, da ake kira na haihuwa dajin.

A haihuwa, da jariran kama babban farin berayen, wanda isa wani tsawon 30-35 cm kuma ku auna nauyi kawai kan rabin kilogram. Makafi, toothless da kuma rufe takaice, taushi da Jawo, su ne gaba ɗaya dogara a kan uwarsa samu daga ta zafi da kuma abinci. Sun girma quite da sauri godiya ga high-kalori madara daga mahaifiyarsa, wanda mai abun ciki ne game da 31%. Little bears zauna tare da su uwa har da shekaru 2.5 years.

mazauninsu siffofin

A mazauninsu na iyakacin duniya bear iya bambanta, kamar yadda dabbobi zai iya yin dogon hijira ta ƙasar da ruwa tare da nahiyar ƙasar da kuma tsibiran. Wasu mutane ciyar mafi yawan shekaru a ƙasar. Mai ciki mãtã ciyar da kaka da kuma hunturu a ƙasa a cikin su na haihuwa dajin.

A iska zafin jiki a cikin Arctic talakawan kai -34 ° C a hunturu da kuma bazara 0 ° C. A coldest wuri a cikin hunturu ne arewa-gabashin Siberia, inda zafin jiki aka saukar zuwa -69 ° C. Warmest yankunan a lokacin bazara dauke m Siberia yankin, Alaska da Canada, inda zafin jiki iya isa + 32 ° C.

Iyakacin duniya Bears mazauninsu wanda da dama a arewacin iyakacin duniya yankuna, sau da yawa wanda aka nuna a cikin zane-zane a rare almarar da kuma littattafan yara, tare da penguins. Duk da haka, da suka rayu a kan daban-daban zura sandunan ɗaukarsa. Iyakacin duniya bears ba rayuwa a Antarctica: penguins rayuwa a can a kan kankara-rufe nahiyar kewaye da teku, da kuma na iyakacin duniya bear mazauninsu - ne Arctic.

Waɗannan su ne, wadannan ban mamaki dabbobi - iyakacin duniya Bears.