{"id":95747,"date":"2025-02-28T14:28:10","date_gmt":"2025-02-28T14:28:10","guid":{"rendered":"https:\/\/www.africa-press.net\/cotedivoire\/politique\/chez-cette-espece-de-poisson-lintelligence-favorise-la-reproduction"},"modified":"2025-02-28T14:28:10","modified_gmt":"2025-02-28T14:28:10","slug":"chez-cette-espece-de-poisson-lintelligence-favorise-la-reproduction","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/cotedivoire\/toutes-les-actualites\/chez-cette-espece-de-poisson-lintelligence-favorise-la-reproduction","title":{"rendered":"Chez cette esp\u00e8ce de poisson, l’intelligence favorise la reproduction"},"content":{"rendered":"

Africa-Press – C\u00f4te d’Ivoire. <\/strong><\/span>Depuis longtemps, l’e\u0301volution des capacite\u0301s cognitives chez les animaux est explique\u0301e par la se\u0301lection naturelle: un cerveau plus performant aide a\u0300 trouver de la nourriture, a\u0300 e\u0301viter les pre\u0301dateurs ou a\u0300 s’adapter a\u0300 un environnement changeant.<\/p>\n

Mais une e\u0301quipe australienne remet en question cette vision simpliste en de\u0301montrant que la se\u0301lection sexuelle favorise e\u0301galement les aptitudes ce\u0301re\u0301brales chez des poissons, les gambusies de l’est (Gambusia holbrooki).<\/p>\n

Les ma\u0302les les plus intelligents ont plus de rejetons<\/b><\/p>\n

Pour tester cette hypothe\u0300se, les chercheurs ont soumis des ma\u0302les a\u0300 une se\u0301rie d’e\u0301preuves cognitives: navigation dans des labyrinthes, contournement d’obstacles transparents, apprentissage d’associations de couleurs, etc. Chaque test offrait une re\u0301compense aux poissons les plus performants. Ensuite, les scientifiques ont observe\u0301 leur succe\u0300s reproductif sur deux mois en analysant plus de 2000 tests de paternite\u0301.<\/p>\n

Le re\u0301sultat est sans appel: les ma\u0302les gambusies les plus intelligents ont eu plus de partenaires et engendre\u0301 davantage de descendants. \u00ab\u00a0Nos travaux montrent que l’e\u0301volution des capacite\u0301s cognitives peut e\u0302tre influence\u0301e par la se\u0301lection sexuelle\u00a0\u00bb, explique dans un communique\u0301 Michael Jennions, co-auteur de l’e\u0301tude parue dans la revue Nature Ecology and Evolution.<\/p>\n

Un me\u0301canisme a\u0300 de\u0301crypter<\/b><\/p>\n

Dans le cadre de cette e\u0301tude, deux hypothe\u0300ses ont e\u0301te\u0301 avance\u0301es pour expliquer l’avantage confe\u0301re\u0301 aux ma\u0302les les plus malins. La premie\u0300re hypothe\u0300se, d’ordre biologique, sugge\u0300re que les femelles manifestent une pre\u0301fe\u0301rence inne\u0301e pour les ma\u0302les qui de\u0301montrent une agilite\u0301 mentale supe\u0301rieure.<\/p>\n

La seconde hypothe\u0300se, plus pragmatique, propose que les gambusies les plus intelligentes sont e\u0301galement plus efficaces pour attirer les femelles et assurer la copulation, une strate\u0301gie re\u0301pandue au sein de cette espe\u0300ce.<\/p>\n

Pour trancher sur cette question, il faudra multiplier les observations des interactions entre les ma\u0302les et les femelles, comme le souligne Ivan Vinogradov, le premier auteur de l’e\u0301tude. Et tenter d’explorer les diffe\u0301rences de comportement entre les ma\u0302les les plus performants dans les labyrinthes et ceux qui s’y perdent, s’il y en a.<\/p>\n

Pour plus d’informations et d’analyses sur la C\u00f4te d’Ivoire<\/span>, suivez Africa-Press<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – C\u00f4te d’Ivoire. Depuis longtemps, l’e\u0301volution des capacite\u0301s cognitives chez les animaux est explique\u0301e par la se\u0301lection naturelle: un cerveau plus performant aide a\u0300 trouver de la nourriture, a\u0300 e\u0301viter les pre\u0301dateurs ou a\u0300 s’adapter a\u0300 un environnement changeant. Mais une e\u0301quipe australienne remet en question cette vision simpliste en de\u0301montrant que la se\u0301lection […]<\/p>\n","protected":false},"author":82,"featured_media":95746,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[37],"class_list":["post-95747","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-cote-divoire-2"],"yoast_head":"\nChez cette esp\u00e8ce de poisson, l'intelligence favorise la reproduction - C\u00f4te d'Ivoire<\/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.africa-press.net\/cotedivoire\/politique\/chez-cette-espece-de-poisson-lintelligence-favorise-la-reproduction\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Chez cette esp\u00e8ce de poisson, l'intelligence favorise la reproduction\" \/>\n<meta property=\"og:description\" content=\"Africa-Press – C\u00f4te d’Ivoire. Depuis longtemps, l’e\u0301volution des capacite\u0301s cognitives chez les animaux est explique\u0301e par la se\u0301lection naturelle: un cerveau plus performant aide a\u0300 trouver de la nourriture, a\u0300 e\u0301viter les pre\u0301dateurs ou a\u0300 s’adapter a\u0300 un environnement changeant. 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