Masayendisiti pakupedzisira vakawana chii akakonzera kutsakatika Megalodon

Over nhoroondo yaro, nyika akasangana vakawanda kutsakatika shanu (kana 8, zvichienderana chii kupatsanura udzidzire). The vakaipisisa ava kutsakatika kukuru makore mamiriyoni 252 apfuura, anokonzerwa unopfuurira kuputika kwemakomo uye unichtozhevshee 96 muzana zvipenyu zvose.

kuchinja

Zvisinei, vamwe "diki" kutsakatika, zviri zvakajeka, aigona kunzvenga dzedu. Somuenzaniso, masayendisiti refu vanofungidzirwa kuti munguva kuchinja pakati Pliocene uye Pleistocene (anenge mamiriyoni 2,6 akapfuura), paiva chinokosha kutsakatika, asi zvakaoma kusarudza sei ngozi yakanga.

Zvino kudzidza itsva vaongorori paUniversity Zurich akawana kuti, pamberi yakakurumbira megafauna nyika - woolly mammoths uye Saber-toothed katsi - akafurira anopikisana zvinhu zvizhinji, makungwa akatamburawo varasikirwa.

Uku pakati maviri Geological epochs akacherekedza Kuchinja kwoushamwari okunze uye kutanga zvikuru glaciation, izvo zvakakonzera pachena akurumidze donhwe wegungwa uye chinokosha kutonhora mumvura.

Sei yakatotsakatika Marine megafauna

Pachishandiswa itsva yera chinyorwa, masayendisiti vakagumisa kuti zvakanga zvakakwana kuuraya munhu zvinoshamisa yokuwanda zvisikwa zvikuru zvegungwa: vanosvika mumwe pavatatu zvomumvura megafauna vakava yakatotsakatika panguva iyi iitike.

Wakaomesesa rova zvomumvura mhuka, kurasikirwa 55% zvakasiyana-siyana. Uyezve, vakarasikirwa vamwe 35% kubva zvomumvura shiri uye 43% chegungwa nenjiva. Zvinokosha kuziva kuti munguva ino vakava yakatotsakatika, 9 chete muzana ari Sharks, asi pakati pazvo paiva zvikuru kuoneka uye zvinokosha mhuka.

Kutsakatika of Megalodon

Isu Chokwadi, kutaura pamusoro Megalodon - rimwe remasangano uye vakatya zvikuru zvikara munhoroondo panyika, iyo inokura kusvika 18 mamita. Zvinofadza kuti nguva nenguva padandemutande ikoko vachifunga kuti chikara ichi chakashata achiri Anovandira kumwe mukudzika munyanza.

Pasinei nezvose izvi nyaya, masayendisiti akazivisa zvakajeka kuti Megalodon akava yakatotsakatika makore mamiriyoni 2,6 akapfuura. Sezvo vakanga kutanga vawana Zvisaririra uchapupu chokuvapo kwavo, masayendisiti akaedza kufunga sei izvi zvakaitika. We zvaipirwa zvakasiyana-siyana, kusanganisira pokuwa cheni zvokudya, kunyanya kukwikwidzana nezvimwe mhuka uye pakarepo kutonhora munyanza.

Self-kuparadzwa cheni chikafu

A kudzidza mutsva panyaya iyi dzakabudiswa muna Nature Ecology & Evolution magazini. Masayendisiti vanoti Nokurasikirwa yakafanira kuderedza gungwa nhanho razvo pamusoro kumahombekombe nzvimbo kwakanga zvakakwana kukonzera vakawanda kutsakatika vasingagoni kurarama kunyange wekare basking shark. Kutaura zvazviri, mhaka kutsakatika Megalodon aiva vaizviita destruct chikafu cheni.

"The kuzarurwa ichi chiitiko kutsakatika zvinoratidza kuti zvipenyu kusiyana zvomumvura megafauna unetseke kuchinja kuti kuitika zvakatipoteredza kupfuura kare vakafunga" - masayendisiti vanoti. Ipapo anotaura mamiriro akanyengera vanhu-mamiriro shanduko, ichiti kuti ayo "zvinogona nemigumisiro nokuda zvomumvura megafauna hakufaniri kurerutswa."