{"id":36763,"date":"2019-09-14T03:20:03","date_gmt":"2019-09-14T00:20:03","guid":{"rendered":"https:\/\/bilimvegelecek.com.tr\/?p=36763"},"modified":"2019-09-13T17:12:36","modified_gmt":"2019-09-13T14:12:36","slug":"t-rexlerin-kafalarinda-klima-oldugu-one-suruldu","status":"publish","type":"post","link":"https:\/\/bilimvegelecek.com.tr\/index.php\/2019\/09\/14\/t-rexlerin-kafalarinda-klima-oldugu-one-suruldu","title":{"rendered":"T. Rex\u2019lerin kafalar\u0131nda “klima” oldu\u011fu \u00f6ne s\u00fcr\u00fcld\u00fc"},"content":{"rendered":"

Missouri, Ohio ve Florida \u00dcniversiteleri’nden biliminsanlar\u0131 ge\u00e7ti\u011fimiz y\u00fczy\u0131l\u0131n g\u00f6r\u00fc\u015flerine meydan okudu ve gezegenimizin etle beslenen en b\u00fcy\u00fck dinozolar\u0131ndan Tyrannosaurus rex\u2019lerin kafalar\u0131nda klima oldu\u011fu fikrini \u00f6ne s\u00fcrd\u00fc.<\/p>\n

Ge\u00e7mi\u015fte biliminsanlar\u0131 T. rex\u2019lerin kafataslar\u0131nda \u00fcst k\u0131sm\u0131nda \u201cdorsotemporal fenestra\u201d ad\u0131ndaki iki b\u00fcy\u00fck deli\u011fin \u00e7i\u011fneme kaslar\u0131yla dolu oldu\u011funu varsay\u0131yordu.\u00a0Ancak Missouri \u00dcniversitesi T\u0131p Fak\u00fcltesi\u2019nde anatomi profes\u00f6r\u00fc olarak g\u00f6rev yapan Casey Holliday bu konuda bir \u00e7al\u0131\u015fma y\u00fcr\u00fctt\u00fc.\u00a0\u201cKaslar\u0131n \u00e7eneden yukar\u0131 \u00e7\u0131k\u0131p, 90 derecelik bir a\u00e7\u0131yla d\u00f6nerek kafatas\u0131n\u0131n \u00e7at\u0131s\u0131 boyunca ilerlemesi olduk\u00e7a garip” diyen Holliday, \u00a0“Ancak, \u015fimdilerde timsahlar ve di\u011fer s\u00fcr\u00fcngenler \u00fczerinde y\u00fcr\u00fctt\u00fc\u011f\u00fcm\u00fcz \u00e7al\u0131\u015fmalara dayanarak, bu b\u00f6lgedeki kan damarlar\u0131 i\u00e7in bir\u00e7ok d\u00fc\u015f\u00fcnd\u00fcr\u00fcc\u00fc verimiz var” a\u00e7\u0131klamalar\u0131nda bulundu.<\/p>\n

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Biliminsanlar\u0131, Tyrannosaurus rex\u2019lerin kafalar\u0131nda klima oldu\u011fu fikrini \u00f6ne s\u00fcrd\u00fc<\/figcaption><\/figure>\n

Ara\u015ft\u0131rmac\u0131lar s\u0131cakl\u0131\u011f\u0131 \u0131\u015f\u0131\u011fa d\u00f6n\u00fc\u015ft\u00fcren termal g\u00f6r\u00fcnt\u00fcleyicileri kullanarak Augustine Timsah \u00c7iftli\u011fi Zooloji Park\u0131\u2019ndaki timsahlar\u0131 incelediler. Elde ettikleri verilerin, yeni bir teoriye kap\u0131 aralayaca\u011f\u0131n\u0131 ve T. rex\u2019lerin kafa anatomisine \u0131\u015f\u0131k tutaca\u011f\u0131n\u0131 d\u00fc\u015f\u00fcn\u00fcyorlar.\u00a0\u201cBir timsah\u0131n v\u00fccut s\u0131cakl\u0131\u011f\u0131 \u00e7evresine g\u00f6re de\u011fi\u015fir” diyor Florida \u00dcniversitesi Biyoloji B\u00f6l\u00fcm\u00fc koordinat\u00f6r\u00fc Kent Vliet ve a\u00e7\u0131klamalar\u0131n\u0131 \u015f\u00f6yle s\u00fcrd\u00fcr\u00fcyor: “Bu nedenle ortam so\u011fudu\u011funda ve timsahlar \u0131s\u0131nmaya \u00e7al\u0131\u015ft\u0131klar\u0131nda, termal g\u00f6r\u00fcnt\u00fcleyicimiz, kafatas\u0131n\u0131n \u00e7at\u0131s\u0131nda bu deliklerde s\u0131cakl\u0131\u011f\u0131n y\u00fckseldi\u011fini g\u00f6steren b\u00fcy\u00fck s\u0131cak noktalar\u0131n\u0131 i\u015faretledi. \u00d6te yandan g\u00fcn\u00fcn daha s\u0131cak saatlerinde bu delikler sanki serin kalmak i\u00e7in kendilerini kapatm\u0131\u015f\u00e7as\u0131na siyaha b\u00fcr\u00fcnd\u00fcler. Bu durum da, timsahlar\u0131n bir ‘\u00e7apraz ak\u0131\u015f dola\u015f\u0131m sistemi’ne ya da deyim yerindeyse bir i\u00e7 termostata sahip oldu\u011funa dair \u00f6nceki kan\u0131tlarla tutarl\u0131l\u0131k g\u00f6steriyor.”<\/p>\n

Holliday ve ekibi termal g\u00f6r\u00fcnt\u00fcleyiciden elde ettikleri verilerini ald\u0131lar ve kafatas\u0131ndaki bu deli\u011fin zamanla nas\u0131l de\u011fi\u015fti\u011fini g\u00f6rebilmek ad\u0131na dinozor ve timsahlar\u0131n fosille\u015fmi\u015f kal\u0131nt\u0131lar\u0131n\u0131 incelediler.\u00a0Ohio \u00dcniversitesi Osteopatik T\u0131p Fak\u00fcltesi’nden anatomi profes\u00f6r\u00fc Larry Witmer konuya ili\u015fkin olarak \u015fu a\u00e7\u0131klamalarda bulundu: “Biliyoruz ki t\u0131pk\u0131 T. rex’lerde oldu\u011fu gibi timsahlar\u0131n da kafataslar\u0131n\u0131n \u00fcst k\u0131sm\u0131nda delikler var bu delikler kan damarlar\u0131yla dolu. Yine de 100 y\u0131l\u0131 a\u015fk\u0131n bir s\u00fcredir bu kaslar\u0131 dinozorlar ile benzer bir kategoride de\u011ferlendiriyoruz. G\u00fcn\u00fcm\u00fczde ya\u015fayan hayvanlar\u0131n baz\u0131 anatomik \u00f6zellikleri ve fizyolojik yap\u0131lar\u0131n\u0131 kullanarak T. rex kafatas\u0131n\u0131n bu b\u00f6l\u00fcm\u00fcn\u00fcn anatomisi hakk\u0131ndaki ilk hipotezleri devirebilece\u011fimizi g\u00f6sterebiliriz.\u201d<\/p>\n

Kaynak:<\/strong> https:\/\/www.sciencedaily.com\/releases\/2019\/09\/190904125337.htm<\/p>\n","protected":false},"excerpt":{"rendered":"

Missouri, Ohio ve Florida \u00dcniversiteleri’nden biliminsanlar\u0131 ge\u00e7ti\u011fimiz y\u00fczy\u0131l\u0131n g\u00f6r\u00fc\u015flerine meydan okudu ve gezegenimizin etle beslenen en b\u00fcy\u00fck dinozolar\u0131ndan Tyrannosaurus rex\u2019lerin kafalar\u0131nda klima oldu\u011fu fikrini \u00f6ne s\u00fcrd\u00fc. Ge\u00e7mi\u015fte biliminsanlar\u0131 T. rex\u2019lerin kafataslar\u0131nda \u00fcst k\u0131sm\u0131nda \u201cdorsotemporal fenestra\u201d ad\u0131ndaki iki b\u00fcy\u00fck deli\u011fin \u00e7i\u011fneme kaslar\u0131yla dolu oldu\u011funu varsay\u0131yordu.\u00a0Ancak Missouri \u00dcniversitesi T\u0131p Fak\u00fcltesi\u2019nde anatomi profes\u00f6r\u00fc olarak g\u00f6rev yapan Casey Holliday […]<\/p>\n","protected":false},"author":1969,"featured_media":36765,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19],"tags":[816,3453,5306,5009],"class_list":["post-36763","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bilim-gundemi","tag-fosil","tag-sicaklik","tag-t-rex","tag-timsah"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t