{"id":34137,"date":"2021-09-10T11:44:50","date_gmt":"2021-09-10T09:44:50","guid":{"rendered":"https:\/\/foretnature.be\/resume-foret-mail\/de-nouvelles-especes-a-partir-de-comportements-differents\/"},"modified":"2021-09-10T11:44:50","modified_gmt":"2021-09-10T09:44:50","slug":"de-nouvelles-especes-a-partir-de-comportements-differents","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/de-nouvelles-especes-a-partir-de-comportements-differents\/","title":{"rendered":"De nouvelles esp\u00e8ces \u00e0 partir de comportements diff\u00e9rents"},"content":{"rendered":"<p>Le col\u00e9opt\u00e8re (Pogonus chalceus) vit dans les marais salants de la ville c\u00f4ti\u00e8re fran\u00e7aise de Gu\u00e9rande (cr\u00e9dit photo : \u00a9 IRSNB)<br \/>\nDes scientifiques de l\u2019Institut royal des Sciences naturelles de Belgique ont mis en lumi\u00e8re une diff\u00e9renciation g\u00e9n\u00e9tique au sein d\u2019un m\u00eame esp\u00e8ce suite \u00e0 un comportement diff\u00e9rent des populations.<br \/>\nCe principe de sp\u00e9ciation est d\u00e9j\u00e0 connu lorsque des barri\u00e8res naturelles s\u00e9parent les populations. Avec le temps les populations s\u00e9par\u00e9es \u00e9voluent en deux esp\u00e8ces distinctes.<br \/>\nIci, les chercheurs ont \u00e9valu\u00e9 les comportements diff\u00e9rents de deux groupes d\u2019une m\u00eame esp\u00e8ce de col\u00e9opt\u00e8re (Pogonus chalceus). Celui-ci vit dans les marais salins pr\u00e8s de Gu\u00e9rande, en France.<br \/>\nLe premier groupe vit dans des zones inond\u00e9es quotidiennement (\u00e0 mar\u00e9e haute) et peut rester plusieurs heures sous l\u2019eau en respirant gr\u00e2ce aux bulles d\u2019air coinc\u00e9es sous sa carapace. Le second vit dans les marais voisins mais inond\u00e9s moins souvent et s\u2019envole dans des zones plus s\u00e8ches lorsque l\u2019eau arrive. Ces ailes sont d\u2019ailleurs plus longues que son cong\u00e9n\u00e8re immerg\u00e9.<br \/>\nLes biologistes de l\u2019IRSNB ont constat\u00e9, gr\u00e2ce \u00e0 des tests en laboratoire, que ce comportement diff\u00e8re d\u00e8s le d\u00e9but du stade larvaire. L\u2019origine (\u00ab sous l\u2019eau \u00bb ou \u00ab volante \u00bb) des larves n\u2019a pas d\u2019importance : seul l&rsquo;environnement d\u00e9termine le comportement.<br \/>\nLes deux groupes en sont ainsi venus \u00e0 ne plus se rencontrer. Chacun reste dans son habitat. C\u2019est la premi\u00e8re \u00e9tape d\u2019une diff\u00e9renciation g\u00e9n\u00e9tique et le d\u00e9but d\u2019une s\u00e9paration possible en deux esp\u00e8ces distinctes. Ils ont d\u2019ailleurs remarqu\u00e9 que les g\u00e8nes responsables de la taille des ailes sont d\u00e9j\u00e0 diff\u00e9rents entre les deux groupes.<br \/>\n\u00ab Les modifications g\u00e9n\u00e9tiques apparaissent donc apr\u00e8s les changements de comportement. Autrement dit, les g\u00e8nes sont des suiveurs, et non des meneurs. \u00bb<br \/>\nDe nouvelles esp\u00e8ces \u00e0 partir de comportements diff\u00e9rents. Communiqu\u00e9 IRSNB, 03\/10\/16.<br \/>\nSteven M. Van Belleghem, Katrien De Wolf, Frederik Hendrickx (2016). Behavioral adaptations imply a direct link between ecological specialization and reproductive isolation in a sympatrically diverging ground beetle. Evolution, DOI 10.1111\/evo.12998.<\/p>","protected":false},"excerpt":{"rendered":"<p>Le col\u00e9opt\u00e8re (Pogonus chalceus) vit dans les marais salants de la ville c\u00f4ti\u00e8re fran\u00e7aise de Gu\u00e9rande (cr\u00e9dit photo : \u00a9 IRSNB) Des scientifiques de l\u2019Institut royal des Sciences naturelles de Belgique ont mis en lumi\u00e8re une diff\u00e9renciation g\u00e9n\u00e9tique au sein d\u2019un m\u00eame esp\u00e8ce suite \u00e0 un comportement diff\u00e9rent des populations. Ce principe de sp\u00e9ciation est [&hellip;]<\/p>","protected":false},"featured_media":0,"template":"","categories":[50],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>De nouvelles esp\u00e8ces \u00e0 partir de comportements diff\u00e9rents - For\u00eat.Nature<\/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:\/\/foretnature.be\/en\/resume-foret-mail\/de-nouvelles-especes-a-partir-de-comportements-differents\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"De nouvelles esp\u00e8ces \u00e0 partir de comportements diff\u00e9rents - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Le col\u00e9opt\u00e8re (Pogonus chalceus) vit dans les marais salants de la ville c\u00f4ti\u00e8re fran\u00e7aise de Gu\u00e9rande (cr\u00e9dit photo : \u00a9 IRSNB) Des scientifiques de l\u2019Institut royal des Sciences naturelles de Belgique ont mis en lumi\u00e8re une diff\u00e9renciation g\u00e9n\u00e9tique au sein d\u2019un m\u00eame esp\u00e8ce suite \u00e0 un comportement diff\u00e9rent des populations. 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