Me yasa bears hibernate: bari muyi magana game da dalilin

Mun ji tun kuruciya cewa bears na yin barci da sanyi. Me ya sa bears ke yin barci, kuma ta yaya hakan ke faruwa? Tabbas masu karatunmu suna yin tunani akai-akai game da waɗannan tambayoyin. Don haka me yasa ba za ku ɗan faɗaɗa tunaninku ba?

Me yasa bears suka fada cikin rashin barci: magana game da dalilin

Da farko kana buƙatar tuna abin da beyar ke ci. launin ruwan kasa da baki galibi suna amfani da kayan lambu. Ina nufin berries berries, mai tushe, tubers. Kuma, ba shakka, ƙwallon ƙafa yana son zuma, wanda ke da ban mamaki mai gina jiki. A cewar masana kimiyya, kusan kashi ¾ na abincin waɗannan dabbobin sun fito ne daga tushen shuka.

Manoman ma sau da yawa suna korafin cewa masu wannan dajin suna barin matsugunin da suka saba yi suna kai hare-hare a cikin gonakin lokaci-lokaci. Suna son, musamman, amfanin gona na masara, hatsi. Lokacin da aka sami girbi mara kyau na berries, filayen su ne ainihin ceto.

Tabbas, a cikin sanyi duk wannan abincin ya zama bear wanda ba zai iya isa ba. Idan bear a zahiri ya zama babu abin da za a ci, yana da hikima don yin hibernate. Duk matakai masu mahimmanci a wannan lokacin zasu ragu saboda raguwa a cikin metabolism. Ta haka rasa yawancin abincin beyar suna rayuwa ba tare da matsala ba.

SHA'AWA: Kwancen ƙwallon ƙafa yakan yi barci daga ƙarshen kaka zuwa farkon bazara. Duk da haka, masana kimiyya sun gano cewa saboda dumamar yanayi, kowane mataki na zafi daga muhalli yana rage lokacin barci da kwanaki 6.

Mutum zai iya ƙin yarda: menene game da kifi da nama, waɗanda kuma za a iya haɗa su a cikin abincin bears? Haka ne, dabbar ma tana ciyar da su. Bugu da ƙari, wani lokacin yana iya ɗaukar ƙananan dabbobin abinci kamar kerkeci, lynx. Duk da haka, kamar yadda aka ambata a baya, irin wannan nau'in abinci bai wuce kashi ɗaya cikin huɗu ba daga yawancin abincin da ake ci. Kuma don tsira hunturu wannan kwata tabbas ba zai isa ba.

Abin sha'awa, ba duka bears suna yin hibernate ba. Don haka, fararen bears da wasu nau'ikan kudanci - sloth, spectacled - kada kuyi haka. Wadannan dabbobin ba sa yin hibernate don cikakken dalili na banal - ba sa buƙatar wannan. Misali, berayen polar suna tsira da sanyi sosai. Bugu da ƙari, irin wannan yanayi yana da dadi a gare su, kuma akwai isasshen abinci a cikin nau'i na hatimi ko da a cikin mafi tsananin sanyi. A cikin kudanci, abinci ba ya ɓacewa ko kaɗan a cikin kowane watanni, saboda haka ba sa fuskantar ƙarancin abinci.

Koyaya, akwai wasu keɓancewa a cikin wannan yanayin. Don haka, polar bears suna da ƙananan hibernation na iya fada cikin mace, wanda ke ciyar da matasa. Musamman tawa ba ta da lokacin abinci a wannan lokacin, saboda haka wasu raguwa a cikin metabolism ba zai cutar da su ba.

Yadda bacci ke bayyana kansa

Shin wannan al'amari ya faru?

• Yin nazarin dalilin da yasa bears ya yi sanyi, mun gano cewa hakan ya faru ne saboda rashin abinci. Sabili da haka, bears dole ne su fara samun mai, abubuwan gina jiki. Kuma mafi, mafi kyau! A zahiri, saboda irin wannan ajiyar, jiki yana cika lokacin bacci. A cewar masana kimiyya, bayan rashin barci, dabbar ta rasa kusan kashi 40% na nauyinta. Sabili da haka, a zahiri nan da nan bayan farkawa, ya sake fara samun nauyi sosai, wanda zai ninka har sai abin da ya faru na dogon lokaci na gaba a cikin kogon.
• Kusa da ƙarshen kaka, ana fara nemo wurin da ya dace. Tare da sa'a, mai gandun daji ya mamaye wani gida wanda wani ya riga ya zauna a cikin hunturu na karshe. Sau da yawa, ta hanyar, dukan tsararraki suna damuna a cikin wannan laka kowace shekara! Idan ba a tsammanin mutum ba, beyar ta gina shi da kansa. Dace da wannan dalili ne wasu keɓaɓɓen wuri a cikin tushen, rassan da gansakuka, alal misali. A matsakaita, ginin Layi ɗaya yana ɗaukar kwanaki 3 zuwa 7. Dabba daya na rayuwa a cikinta, sai dai in ba ita ce bear mai ‘ya’ya ba.
• A hankali, kafin a kwanta barci, beyar tana ƙara yin rashin ƙarfi. Wannan yana faruwa ne saboda tsarin rayuwa yana raguwa sannu a hankali. Wato bugun bugun jini da nunfashi suna zama da wuya. Ko da zafin jiki yana raguwa zuwa digiri 30. Bugu da ƙari, a cikin farkawa na dabbar, yana daidaitawa daga 36,8 zuwa 38,8 digiri.
• Bears suna barci ta hanyoyi daban-daban: wasu suna kwance a baya, wasu suna kwance a gefensu. Sau da yawa, a hanya, berayen suna barci, suna murƙushewa suna murƙushe bakinsu da tafin hannu. Don haka ne ma, mafarauta sukan yi tunanin cewa dabbobi suna tsotsar tafin hannu saboda yunwa, wanda ko kadan ba haka yake ba.
• Af, bears gaske tsotse tafin hannu. Fiye da daidai, suna cire saman saman fata na keratinized daga pads. Idan ba tare da wannan Layer ba, dabbobi ba za su iya motsawa a kan sassa masu kaifi - duwatsu, alal misali. Duk da haka, fata yana ƙoƙarin canzawa, kuma dole ne a cire manyan yadudduka. Haka kuma, fatar da ke bazuwar tana haifar da qaiqayi, kwatankwacin wanda mutane ke fuskanta idan sun yi zafi a rana. Saboda haka, ba tare da saninsa ba, beyar ta ƙwanƙwasa fata.
• Mutane da yawa suna sha'awar yadda bear ke sauke kansa yayin barci. Sai ya zama bai yi ba. Fitsarin yana rushewa zuwa sunadaran, wanda nan da nan jiki ya sha kuma yana da amfani sosai a wannan lokacin. Dangane da najasa, kuma ba a fitar da su daga jiki - a ƙarshen kaka, berayen suna samar da wani toshe na musamman wanda ke toshe babban hanji. Yana bace a cikin bazara.

В babu abin da ke faruwa a yanayi haka. Tabbas, irin wannan al'amari kamar rashin bacci, yana da bayaninsa da hanyoyinsa. Idan ba tare da su ba, beyar ba za ta kasance da gaske ba.