An gano ragowar wani tsohon dolphin kogin da ya bace a cikin Amazon.
Kimanin mita 3,5 a girman da shekaru miliyan 16: Masana burbushin halittu daga Jami'ar Zurich sun sanar da gano wani tsohon nau'in dabbar dolphin na ruwa a yankin Amazon na Peruvian. An gano burbushin nasa a nan yayin wani balaguron kimiyya. Masu binciken sun ba da rahoton hakan a cikin wata sanarwa. aka buga akan gidan yanar gizon EurekAlert.
Kamar yadda bayani ya gabata, dolphins na kogin suna daga cikin ciyayi na zamani da ba kasafai ake samun su ba, wadanda akasarinsu nau’in halittu ne a halin yanzu.
An gano sabon nau'in, mai suna Pebanista yacuruna bayan mutanen ruwa na almara waɗanda ke zaune a cikin rafin Amazon, an gano su a cikin Amazon na Peruvian. Kamfanin dillancin labarai na gwamnatin Peru ya wallafa labarin game da wannan a tashar Agencia de Noticias Andina ta YouTube.
"Peru na iya sanar da duniyar kimiyya sabon taska: mafi girma kogin dolphin Pebanista yacuruna ya rayu shekaru miliyan 16 da suka wuce a cikin proto-Amazon, yanzu yankin Loreto (yankin mafi girma na kasar, wanda ke mamaye kashi uku na yankinsa kuma ya mamaye shi). yana da mafi ƙarancin yawan jama'a a Peru saboda wurin da yake da nisa a yankin dazuzzukan Amazon). Kuma abin da ya fi ban mamaki shi ne cewa shi dan uwansa ne na cetaceans da ke toshe kogunan Kudancin Asiya,” in ji rahoton.
Sabbin nau'in dabbar dolphin na cikin Platanistoidea, rukuni ne na dabbar dolphin da suka yadu a cikin tekunan duniya shekaru miliyan 16-24 da suka wuce. Masu binciken sun yi imanin cewa kakanninsu na ruwa sun mamaye muhallin halittu masu wadatar ruwa na proto-Amazonia kuma sun dace da wannan sabon muhalli.
"Shekaru miliyan 16 da suka gabata, Amazon na Peruvian ya bambanta da yadda yake a yau. Yawancin filayen Amazon an rufe su da tsarin tafkuna da fadama. Wannan shimfidar wuri ta rufe abin da a yanzu ake kira Colombia, Ecuador, Bolivia, Peru da Brazil,” in ji Aldo Benitez-Palomino, jagoran marubucin binciken daga Sashen Nazarin Paleontology na Jami'ar Zurich.
Lokacin da yanayin da aka kwatanta ya fara ba da hanyar zuwa Amazonia na zamani game da shekaru miliyan 10 da suka wuce, waɗannan canje-canje sun haifar da bacewar gandun daji na Pebanista yacuruna. Manyan dolphins daga ƙarshe sun bace. Binciken da aka yi nazari ya ba da haske kan tarihin juyin halittar dabbar dolphins.
"Mun gano cewa girmansa ba shine kawai abin mamaki ba. Muna sa ran samun dangi na kusa na dolphins na kogin Amazon da ke rayuwa a yau, amma ya zamana cewa dangin Pebanista na kusa su ne dolphins na Kudancin Asiya (genus Platanista),” masanin burbushin halittu ya bayyana.
Pebanista da Platanista sun ɓullo da tsarin kwanyar kasusuwa sosai da ke da alaƙa da ecolocation — ikon “gani” ta hanyar yin manyan sautuka da sauraron kararrakinsu, waɗanda suke dogara da su lokacin farauta. Wani dogon hanci mai tsayi tare da hakora da yawa yana nuna cewa Pebanista ya ci kifi, kamar sauran nau'in dolphins na kogin a yau.
Dajin Amazon yana ɗaya daga cikin yankuna mafi tsauri don binciken filin burbushin halittu. Kasusuwan kasusuwa suna samuwa ne kawai a lokacin rani, lokacin da matakan kogi ba su da yawa don fallasa tsoffin duwatsu. Idan ba a tattara abubuwan da aka samo a cikin lokaci ba, yawan ruwan da aka samu a lokacin damina zai wanke su kuma za su yi hasara har abada.
Holotype na Pebanista yacuruna - kawai samfurin jiki wanda aka samo bayanin da sunan sabon nau'in - an samo shi a cikin 2018 kuma an yi nazari sosai a duk wannan lokacin. Sannan balaguron ya mamaye fiye da kilomita 300 tare da kogin Napo, inda aka yi bincike a yankin. An tattara burbushin halittu da dama, amma babban abin mamaki yana jira a ƙarshen balaguron. Bayan kusan makonni uku na bincike, an gano wani babban kwanyar dabbar dolphin, wanda yanzu ana adana shi har abada a cikin Gidan Tarihi na Tarihin Halitta a Lima (Peru).
A baya can, masana burbushin halittu gano wani sabon nau'in dabbar burbushin halittu, wanda shine dan takarar neman lakabin halitta mafi nauyi a tarihin duniya. An samu burbushin burbushin wani katon kifin kifi a cikin hamada dake kudancin kasar Peru. Sunan sabon nau'in suna Perucetus colossus. A cikin duka, an samo kasusuwa 18 na giant prehistoric: 13 vertebrae, haƙarƙari huɗu da wani ɓangare na femur. Wannan ya isa ga masana kimiyya su fahimci irin nauyin wannan kifin kifi.
Muna ba da shawarar cewa ku karanta kuma ku lura da duk abin da aka yanke akan tashar mu bisa ga ra'ayin ku. Kada ku yi maganin kai! A cikin labaranmu, muna tattara sabbin bayanan kimiyya da kuma ra'ayoyin masana masu iko a fannin kiwon lafiya. Amma ku tuna: likita ne kawai zai iya tantancewa kuma ya rubuta magani.
An yi niyya ta hanyar tashar don masu amfani fiye da shekaru 13. Wasu kayan ƙila ba za su dace da yara masu ƙasa da shekara 16 ba. Ba ma tattara bayanan sirri daga yara a ƙarƙashin 13 ba tare da izinin iyaye ba.Muna da ƙaramin buƙata. Muna ƙoƙari don ƙirƙirar abun ciki mai inganci wanda ke taimakawa kula da dabbobi, kuma muna ba da shi kyauta ga kowa da kowa saboda mun yi imani cewa kowa ya cancanci ingantaccen bayani mai amfani.
Tallace-tallacen kuɗaɗen talla yana ɗaukar ƙaramin yanki na farashin mu, kuma muna son ci gaba da samar da abun ciki ba tare da buƙatar ƙara talla ba. Idan kun sami amfanin kayanmu, don Allah tallafa mana. Yana ɗaukar minti ɗaya kawai, amma tallafin ku zai taimaka mana mu rage dogaro ga talla da ƙirƙirar labarai masu fa'ida. Na gode!
