{"id":64778,"date":"2025-01-14T12:57:42","date_gmt":"2025-01-14T12:57:42","guid":{"rendered":"https:\/\/www.africa-press.net\/senegal\/politique\/vous-ne-devinerez-jamais-ou-se-cache-le-nez-des-araignees"},"modified":"2025-01-14T12:57:42","modified_gmt":"2025-01-14T12:57:42","slug":"vous-ne-devinerez-jamais-ou-se-cache-le-nez-des-araignees","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/vous-ne-devinerez-jamais-ou-se-cache-le-nez-des-araignees","title":{"rendered":"Vous ne Devinerez Jamais o\u00f9 se Cache le Nez des Araign\u00e9es"},"content":{"rendered":"

Africa-Press – Senegal. <\/strong><\/span>Depuis longtemps, les chercheurs savent que les araigne\u0301es sont sensibles au moins a\u0300 certaines odeurs. Ils ont de\u0301sormais compris comment elles font pour les sentir.<\/p>\n

Elles sont pre\u0301sentes un peu partout autour de nous. Les araigne\u0301es. Les scientifiques en connaissent plus de 50 000 espe\u0300ces. Ils nous ont appris qu’elles ont de nombreux yeux. Mais jusqu’ici, ils ignoraient encore comment les araigne\u0301es peuvent de\u0301tecter les odeurs, alors qu’ils ont montre\u0301 depuis longtemps qu’elles les \u00ab sentent \u00bb bel et bien, pourtant. Celles des phe\u0301romones sexuelles, notamment.<\/p>\n

Des milliers de poils pour sentir les araigne\u0301es femelles<\/b><\/p>\n

Aujourd’hui enfin, des biologistes de l’universite\u0301 de Lund (Sue\u0300de) ont mis au jour le secret du \u00ab nez \u00bb des araigne\u0301es. Il se cache dans des sortes de poils sensoriels situe\u0301s sur leurs pattes. Et dans les Proceedings of the National Academy of Sciences, les chercheurs racontent comment ils ont examine\u0301 des spe\u0301cimens d’Argiope bruennichi, que l’on appelle commune\u0301ment l’Argiope frelon, au microscope e\u0301lectronique a\u0300 balayage haute re\u0301solution et comment ils ont de\u0301couvert des milliers de ces sensilles sur toutes les pattes ambulatoires des araigne\u0301es ma\u0302les. Des sensilles diffe\u0301rentes de celles que l’on trouve chez les insectes et chez les autres arthropodes.<\/p>\n

Des capteurs olfactifs ultrasensibles chez les ma\u0302les adultes<\/b><\/p>\n

Ces \u00ab nez \u00bb sont localise\u0301s sur la partie supe\u0301rieure des pattes. Des zones qui entrent peu en contact avec les sols et donc, plus sensibles a\u0300 la de\u0301tection des odeurs en suspension dans l’air. Et les expe\u0301riences mene\u0301es par les biologistes montrent qu’ils re\u0301agissent bien aux odeurs des phe\u0301romones femelles.<\/p>\n

Seuls les ma\u0302les adultes en sont e\u0301quipe\u0301s. Et quelques nanogrammes de phe\u0301romones suffisent a\u0300 de\u0301clencher une re\u0301ponse.<\/p>\n

Des questions toujours en suspens<\/b><\/p>\n

Poussant plus loin leurs travaux, les chercheurs ont de\u0301couvert de telles sensilles sur la plupart des 19 espe\u0300ces qu’ils ont e\u0301tudie\u0301es. Toujours sur des ma\u0302les. Reste ainsi un certain nombre de questions sans re\u0301ponse. Par exemple, le fait de comprendre comment les araigne\u0301es femelles peuvent sentir. Et de savoir aussi si les \u00ab nez \u00bb des araigne\u0301es peuvent de\u0301tecter d’autres odeurs que celles des phe\u0301romones sexuelles. Affaire a\u0300 suivre…<\/p>\n

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

Africa-Press – Senegal. Depuis longtemps, les chercheurs savent que les araigne\u0301es sont sensibles au moins a\u0300 certaines odeurs. Ils ont de\u0301sormais compris comment elles font pour les sentir. Elles sont pre\u0301sentes un peu partout autour de nous. Les araigne\u0301es. Les scientifiques en connaissent plus de 50 000 espe\u0300ces. Ils nous ont appris qu’elles ont de […]<\/p>\n","protected":false},"author":82,"featured_media":64777,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[44],"class_list":["post-64778","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-senegal-2"],"yoast_head":"\nVous ne Devinerez Jamais o\u00f9 se Cache le Nez des Araign\u00e9es - Senegal<\/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\/senegal\/politique\/vous-ne-devinerez-jamais-ou-se-cache-le-nez-des-araignees\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Vous ne Devinerez Jamais o\u00f9 se Cache le Nez des Araign\u00e9es\" \/>\n<meta property=\"og:description\" content=\"Africa-Press – Senegal. Depuis longtemps, les chercheurs savent que les araigne\u0301es sont sensibles au moins a\u0300 certaines odeurs. Ils ont de\u0301sormais compris comment elles font pour les sentir. Elles sont pre\u0301sentes un peu partout autour de nous. Les araigne\u0301es. Les scientifiques en connaissent plus de 50 000 espe\u0300ces. 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