{"id":9224,"date":"2024-07-30T10:00:00","date_gmt":"2024-07-30T08:00:00","guid":{"rendered":"https:\/\/www.triopsgalaxy.de\/?p=9224"},"modified":"2024-07-29T19:28:25","modified_gmt":"2024-07-29T17:28:25","slug":"t-rex-de-15-tonnes","status":"publish","type":"post","link":"https:\/\/www.triopsgalaxy.de\/fr\/t-rex-de-15-tonnes\/","title":{"rendered":"Pal\u00e9ontologie : le T. rex aurait-il pu peser 15 tonnes ?"},"content":{"rendered":"\n<p>Le plus grand T. rex d\u00e9couvert n&rsquo;est peut-\u00eatre pas le plus grand qui ait jamais exist\u00e9. \u00ab Certains os isol\u00e9s et fragments indiquent qu&rsquo;il existait des individus plus grands que ceux dont nous avons d\u00e9couvert les squelettes jusqu&rsquo;\u00e0 pr\u00e9sent \u00bb, explique David Hone de la Queen Mary University of London dans un communiqu\u00e9. Le plus grand squelette de Tyrannosaurus rex, connu sous le nom de Scotty, a \u00e9t\u00e9 d\u00e9couvert au Canada en 1991. De son vivant, ce sp\u00e9cimen mesurait probablement 13 m\u00e8tres de long et pesait pr\u00e8s de neuf tonnes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Les chercheurs devraient encore d\u00e9terrer des fossiles pendant environ 1000 ans<\/h2>\n\n\n\n<p>En collaboration avec Jordan Mallon du Mus\u00e9e canadien de la nature, Hone a reconstruit sur ordinateur la taille du plus grand T. rex de tous les temps. En comparaison, Scotty semble petit : le T. rex record pourrait avoir pes\u00e9 environ 15 tonnes et mesur\u00e9 15 m\u00e8tres de long. Les r\u00e9sultats de cette \u00e9tude ont \u00e9t\u00e9 publi\u00e9s dans la revue sp\u00e9cialis\u00e9e Ecology and Evolution.<\/p>\n\n\n\n<p>Selon l&rsquo;\u00e9tude, environ 2,5 milliards d&rsquo;individus ont v\u00e9cu pendant les quelque 2,4 millions d&rsquo;ann\u00e9es d&rsquo;existence du Tyrannosaurus rex. Cependant, seuls 84 squelettes relativement complets ont \u00e9t\u00e9 d\u00e9couverts jusqu&rsquo;\u00e0 pr\u00e9sent. Il n&rsquo;\u00e9tait donc pas clair si les plus grands squelettes d\u00e9couverts jusqu&rsquo;\u00e0 pr\u00e9sent appartenaient effectivement aux plus grands individus de cette esp\u00e8ce ou s&rsquo;il existait des animaux beaucoup plus grands.<\/p>\n\n\n\n<p>Pour estimer les dimensions maximales du corps du T. rex, les chercheurs ont simul\u00e9 une population de 140 millions d&rsquo;animaux en tenant compte de diff\u00e9rents facteurs tels que le taux de croissance et la dur\u00e9e de vie de l&rsquo;esp\u00e8ce. Les diff\u00e9rences de sexe ont \u00e9galement \u00e9t\u00e9 prises en compte. Selon les calculs des chercheurs, il faudrait encore exhumer des fossiles pendant environ 1000 ans pour trouver un sp\u00e9cimen appartenant au plus grand 0,01 pour cent.<\/p>\n\n\n\n<p>Il est cependant tr\u00e8s improbable que l&rsquo;on trouve un jour un squelette correspondant \u00e0 la taille calcul\u00e9e. Selon les mod\u00e8les informatiques, les fossiles d\u00e9j\u00e0 d\u00e9couverts appartiennent au 99e centile de la masse corporelle de T. rex &#8211; ils sont donc aussi grands que le plus grand un pour cent des animaux ayant jamais v\u00e9cu.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le plus grand T. rex d\u00e9couvert n&rsquo;est peut-\u00eatre pas le plus grand qui ait jamais exist\u00e9. \u00ab Certains os isol\u00e9s et fragments indiquent qu&rsquo;il existait des individus plus grands que ceux dont nous avons d\u00e9couvert les squelettes jusqu&rsquo;\u00e0 pr\u00e9sent \u00bb, explique David Hone de la Queen Mary University of London dans un communiqu\u00e9. Le plus [&#8230;]\n","protected":false},"author":2,"featured_media":7621,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[240],"tags":[],"class_list":["post-9224","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-fr"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pal\u00e9ontologie : T. rex de 15 tonnes ? - Triops Galaxy<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.triopsgalaxy.de\/fr\/t-rex-de-15-tonnes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pal\u00e9ontologie : T. rex de 15 tonnes ? - Triops Galaxy\" \/>\n<meta property=\"og:description\" content=\"Le plus grand T. rex d\u00e9couvert n&rsquo;est peut-\u00eatre pas le plus grand qui ait jamais exist\u00e9. \u00ab Certains os isol\u00e9s et fragments indiquent qu&rsquo;il existait des individus plus grands que ceux dont nous avons d\u00e9couvert les squelettes jusqu&rsquo;\u00e0 pr\u00e9sent \u00bb, explique David Hone de la Queen Mary University of London dans un communiqu\u00e9. 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