{"id":2843,"date":"2014-08-21T15:13:45","date_gmt":"2014-08-21T20:13:45","guid":{"rendered":"http:\/\/sciencemediacentre.ca\/site\/?p=2843"},"modified":"2014-08-21T15:15:45","modified_gmt":"2014-08-21T20:15:45","slug":"le-premier-vol-ou-pourquoi-les-jeunes-oiseaux-migrent-plus-lentement","status":"publish","type":"post","link":"http:\/\/sciencemediacentre.ca\/site\/le-premier-vol-ou-pourquoi-les-jeunes-oiseaux-migrent-plus-lentement\/","title":{"rendered":"Le premier vol, ou pourquoi les jeunes oiseaux migrent plus lentement<img src=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/01\/canada_flag_icon_small.gif\">"},"content":{"rendered":"<div id=\"attachment_2828\" style=\"width: 310px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/08\/Wood-thrush-2-credit-Kevin-Fraser.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-2828\" class=\"size-full wp-image-2828\" src=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/08\/Wood-thrush-2-credit-Kevin-Fraser.jpg\" alt=\"La grive des bois passe l\u2019hiver au B\u00e9lize et au Costa Rica et niche aux \u00c9tats-Unis et au Canada pendant l\u2019\u00e9t\u00e9. (Photo: Kevin Fraser)\" width=\"300\" height=\"450\" srcset=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/08\/Wood-thrush-2-credit-Kevin-Fraser.jpg 300w, http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/08\/Wood-thrush-2-credit-Kevin-Fraser-200x300.jpg 200w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-2828\" class=\"wp-caption-text\">La grive des bois passe l\u2019hiver au B\u00e9lize et au Costa Rica et niche aux \u00c9tats-Unis et au Canada pendant l\u2019\u00e9t\u00e9. (Photo: Kevin Fraser)<\/p><\/div>\n<p><span style=\"color: #000000;\">Une nouvelle \u00e9tude montre que les jeunes oiseaux qui migrent pour la premi\u00e8re fois sont plus lents que les adultes afin d\u2019\u00e9viter la comp\u00e9tition avec ceux-ci. <\/span><\/p>\n<p><span style=\"color: #000000;\">Des chercheurs ont utilis\u00e9 des donn\u00e9es de g\u00e9olocalisation sur des grives des bois migrants du B\u00e9lize et du Costa Rica jusqu\u2019au Canada. Ils ont trouv\u00e9 que les jeunes oiseaux commencent leur migration 2 semaines plus tard que les adultes et prennent environ 50% plus de temps pour arriver \u00e0 destination. Les chercheurs expliquent que les ailes plus courtes des jeunes oiseaux seraient moins efficaces et obligeraient les jeunes \u00e0 faire plus d\u2019arr\u00eats. <\/span><\/p>\n<p><span style=\"color: #000000;\">Toutefois, une fois arriv\u00e9 au Canada, ce d\u00e9savantage \u00e9vite aux jeunes oiseaux \u00e0 avoir \u00e0 concurrencer les adultes pour les meilleurs sites de nidification.<\/span><\/p>\n<p>Pour lire l\u2019article original publi\u00e9 dans\u00a0<em>PLoS ONE\u00a0<\/em>le\u00a0<strong>20 ao\u00fbt\u00a0<\/strong><strong>2014<\/strong>,\u00a0<span style=\"text-decoration: underline;\"><a href=\"http:\/\/www.plosone.org\/article\/info%3Adoi%2F10.1371%2Fjournal.pone.0105605\" target=\"_blank\">cliquez ici<\/a><\/span>.<\/p>\n<p><span style=\"text-decoration: underline;\"><em><strong>Auteur \u00e0 contacter pour plus d\u2019informations<\/strong><\/em><\/span><\/p>\n<h4 dir=\"ltr\"><span style=\"color: #000000;\">Emily McKinnon, Universit\u00e9 York,\u00a0Ontario<\/span><\/h4>\n<h4 dir=\"ltr\"><span style=\"color: #000000;\">Kevin Fraser, Universit\u00e9 du Manitoba, Manitoba<\/span><\/h4>\n","protected":false},"excerpt":{"rendered":"<p>Une nouvelle \u00e9tude montre que les jeunes oiseaux qui migrent pour la premi\u00e8re fois sont plus lents que les adultes afin d\u2019\u00e9viter la comp\u00e9tition avec ceux-ci. Des chercheurs ont utilis\u00e9 des donn\u00e9es de g\u00e9olocalisation sur des grives des bois migrants du B\u00e9lize et du Costa Rica jusqu\u2019au Canada. Ils ont trouv\u00e9 que les jeunes oiseaux [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":2828,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[531],"tags":[1263,843,68,846],"class_list":["post-2843","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-paper-of-interest-fr","tag-comportement-animal","tag-manitoba","tag-oiseaux","tag-ontario-fr"],"jetpack_featured_media_url":"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/08\/Wood-thrush-2-credit-Kevin-Fraser.jpg","jetpack_shortlink":"https:\/\/wp.me\/p4DqbN-JR","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/2843","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/comments?post=2843"}],"version-history":[{"count":2,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/2843\/revisions"}],"predecessor-version":[{"id":2848,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/2843\/revisions\/2848"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/media\/2828"}],"wp:attachment":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/media?parent=2843"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/categories?post=2843"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/tags?post=2843"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}