Ba da dadewa ba, masana kimiyyar halittu daga Afirka ta Kudu suka gano cewa a cikin mazauninsu, giwaye suna kwana ta hanyoyi daban-daban: duka kwance da tsaye. Kowace rana, babban launi yakan shiga cikin barcin awa biyu ba tare da canza yanayin jikinsu ba, kuma sau ɗaya kawai cikin kwana uku suna ba da kansu damar kwanciya, suna shiga cikin yanayin bacci na REM.
Tsammani
Akwai nau'ikan da dama game da dalilin da yasa giwaye suka fi son ba da kansu ga hannun Morpheus yayin tsaye.
Na farko. Dabbobi ba sa kwanciya, suna kare siririn fata tsakanin yatsun kafa daga mamayar ƙananan beraye, da kunnuwa da kututture daga shigarwar dabbobi masu rarrafe masu guba da ire-irensu guda a cikinsu. Wannan sigar ba zata yiwu ba saboda wata hujja mai sauƙi: giwaye (tare da fata mai taushi) sun natsu a ƙasa.
Na biyu. Kattai masu nauyin tan da yawa ba sa yawan kwanciya, tunda a cikin halin da suke ciki suna da matsewar gabobin jikinsu. Wannan hasashe ma bai tsaya ga zargi ba: hatta giwayen da suka tsufa suna da ƙwaƙƙwaran ƙwayoyin tsoka da ke kare gabobin jikinsu.
Na uku. Wannan yanayin yana taimaka wa mara nauyi mai nauyi ya hanzarta ɗaukar matakin kariya yayin da farauta suka fara farkawa ba zato ba tsammani. Wannan bayanin ya fi kama da gaskiya: tare da harin da ba zato ba tsammani, giwa kawai ba za ta iya tsayawa kan kafafunta ba kuma za ta mutu.
Na Hudu. Memorywaƙwalwar ajiyar halitta tana sa giwaye su yi barci yayin da suke tsaye - wannan shi ne yadda magabatansu da ke nesa, mammoths, suka yi barci a ƙafafunsu. Ta wannan hanyar, sun kiyaye jikinsu daga yuwuwar yanayin sanyi: har ma da furcin yalwa bai ceci tsoffin dabbobi masu shayarwa daga tsananin sanyi ba. A zamanin yau, nau'in kwayar halitta ba za a musanta ko tabbatar ba.
Yadda giwaye suke bacci
Har ila yau, babu wani baki] aya game da wannan al'amarin. Gabaɗaya an yarda cewa giwayen Afirka da Indiya suna zaɓar hanyoyin daban don yin bacci.
Sigogin fasali
Afirka na kwana a tsaye, jingina gefe da jikin bishiyar bishi ko haɗa shi da akwati. Akwai ra'ayin da ba a tabbatar ba cewa giwayen Afirka ba sa sauka ƙasa saboda tsoron zafin rana a ƙasa mai zafi. A cikin yanayi mai zafi ƙwarai, dabbobi na barin kansu yin barci a cikin cikinsu, ƙafafunsu sun lankwasa da kututture suna lanƙwashe. An yi imani da cewa maza galibi suna kwana a tsaye, kuma budurwarsu da cuba andansu sukan huta a kwance.
An ce giwayen Indiya sun fi kwanciya bacci a wani wuri, suna lankwasa gaɓoɓin baya da kuma kwantar da kawunansu a kan waɗanda aka faɗaɗa gaba. Yara da matasa suna son yin bacci a gefensu, kuma dabbobin da suka manyanta ba sa iya yin barci a ciki / gefensu, sun fi son yin bacci yayin da suke tsaye.
Giwayen dabaru
Yayin da dabbobi ke tsaye a ƙafafunsu, suna barci, suna kwantar da ƙuttukansu / hauren a kan rassan masu kauri, da kuma sanya manyan ƙusoshin kan tsaunin duwatsu ko kan tudun duwatsu. Idan kun yi barci yayin da kuke kwance, zai fi kyau ku sami goyon baya mai ƙarfi a nan kusa don taimakawa giwar ta tashi daga ƙasa.
Yana da ban sha'awa! Akwai ra'ayi cewa masu kwantar da hankali (garken giwaye 1-2) suna ba da kwanciyar hankali, waɗanda ke lura da abubuwan da ke kewaye da su don tayar da dangi a cikin haɗari kaɗan.
Abu mafi wahalar bacci shine tsofaffin maza, waɗanda dole ne su tallafawa babban kawunan su, waɗanda nauyinsu da ƙyauren haushi ya hau kansu, tsawon kwanaki a ƙarshe. Adana daidaito, tsofaffin maza sun rungumi bishiya ko kuma suna kwance a gefensu, kamar ɗiya. Giwayen jarirai waɗanda ba su da kiba har yanzu suna kwanciya cikin sauƙi kuma suna tashi da sauri.
Yaran suna kewaye da giwayen tsofaffi, suna kare yara daga hare-haren cin amana na masu farauta. Barcin gajeren lokaci yana katsewa ta hanyar farkawa akai-akai: manya suna shakar ƙamshin ƙamshi kuma suna sauraron sautuna masu firgitarwa.
Gaskiya
Jami'ar Witwatersrand ta gudanar da bincike kan barcin giwaye. Tabbas, an riga an lura da wannan aikin a gidajen zoo, yana tabbatar da cewa giwaye suna yin bacci na tsawon awanni 4. Amma bacci a cikin fursuna ya fi kowane lokaci tsayi fiye da na daji, don haka masana kimiyyar halittu na Afirka ta Kudu suka yanke shawarar auna tsawon lokacin bacci dangane da aikin kwayar halittar giwar, akwati.
An saki dabbobin a cikin savannah, sanye take da kayan kwalliya (wanda ya nuna a wane wuri giwa ta yi barci), da kuma masu karɓar GPS waɗanda ke rikodin motsin garken. Masana ilmin dabbobi sun gano cewa talakawansu sun yi bacci na awanni 2, kuma a ƙa’ida - a tsaye. Giwayen suna kwance a ƙasa kowane kwana 3-4, suna yin bacci ƙasa da awa ɗaya. Masana kimiyya sun tabbata cewa a wannan sa'ar ne dabbobin suka shiga cikin barci REM, lokacin da aka sami ƙwaƙwalwar ajiyar dogon lokaci kuma aka yi mafarki.
Hakanan ya bayyana cewa ƙattai suna buƙatar kwanciyar hankali da nutsuwa: masu farauta, mutane ko dabbobi masu shayarwa masu yawo da ke yawo na iya zama tushen tashin hankali.
Yana da ban sha'awa! Jin kasancewar makwabta masu hayaniya ko masu haɗari, garken ya bar wurin da aka zaɓa kuma zai iya yin tafiya har zuwa kilomita 30 don neman wurin da babu nutsuwa don bacci.
Ya zama karara cewa farkawa da kuma yin bacci a cikin giwaye ba su da alaƙa da lokacin rana. Dabbobin da faɗuwar rana da fitowar rana ba sa jagorar dabbobi kamar yadda yanayin zafi da ɗimbin yanayin da ke musu dadi: sau da yawa giwayen ke yin bacci da sanyin safiya, har rana ta fito.
Kammalawa: a dabi'a, giwaye suna barcin rabin abin da suke cikin bauta, kuma sun ninka sau huɗu fiye da mutane.
