{"id":97392,"date":"2026-04-22T13:02:40","date_gmt":"2026-04-22T13:02:40","guid":{"rendered":"https:\/\/www.africa-press.net\/niger\/politique\/comportement-des-saumons-sauvages-et-pollution-a-la-cocaine"},"modified":"2026-04-22T13:15:47","modified_gmt":"2026-04-22T13:15:47","slug":"comportement-des-saumons-sauvages-et-pollution-a-la-cocaine","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/comportement-des-saumons-sauvages-et-pollution-a-la-cocaine","title":{"rendered":"Comportement des saumons sauvages et pollution \u00e0 la coca\u00efne"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Niger. <\/strong><\/span>Affecte\u0301s par l&rsquo;un des me\u0301tabolites de la cocai\u0308ne qui s&rsquo;accumule dans leur cerveau, les saumons de l&rsquo;Atlantique changent de comportement. C&rsquo;est la conclusion d&rsquo;une e\u0301tude internationale mene\u0301e non pas en laboratoire mais dans la nature. Des scientifiques ont e\u0301quipe\u0301 105 jeunes saumons de l&rsquo;Atlantique a\u0302ge\u0301s de deux ans, avec des implants capables de libe\u0301rer lentement des substances chimiques. Ils ont ensuite suivi leurs mouvements durant huit semaines dans le Va\u0308ttern, un important lac situe\u0301 en Sue\u0300de.<\/p>\n<p>Certains poissons n&rsquo;e\u0301taient soumis a\u0300 aucun compose\u0301 via leur implant (te\u0301moins), d&rsquo;autres recevaient de la cocai\u0308ne &#8211; un stimulant psychomoteur &#8211; et les derniers e\u0301taient contamine\u0301s par son me\u0301tabolite principal, qui se retrouve bien souvent dans les eaux use\u0301es: la benzoylecgonine. Et c&rsquo;est ce compose\u0301 qui affecte le plus les jeunes saumons, re\u0301ve\u0300le la nouvelle e\u0301tude.<\/p>\n<p>Il les conduit a\u0300 nager 1,9 fois plus loin par semaine que les poissons te\u0301moins et a\u0300 se disperser 12,3 kilome\u0300tres plus loin a\u0300 travers le lac. La benzoylecgonine augmente donc drastiquement le nombre de mouvements re\u0301alise\u0301s par ces saumons. L&rsquo;effet de ce me\u0301tabolisme est plus important que celui de la cocai\u0308ne elle-me\u0302me.<\/p>\n<p><b>Un pollution mondiale<\/b><\/p>\n<p>L&rsquo;e\u0301loignement plus prononce\u0301 des poissons sous benzoylecgonine n&rsquo;est pas anodin. \u00ab\u00a0L\u2019endroit ou\u0300 vont les poissons de\u0301termine ce qu\u2019ils mangent, ce qui les mange et comment les populations sont structure\u0301es, remarque dans un communique\u0301 le Dr Marcus Michelangeli. Si la pollution modifie ces sche\u0301mas, elle risque d\u2019affecter les e\u0301cosyste\u0300mes d\u2019une manie\u0300re que nous commenc\u0327ons a\u0300 peine a\u0300 comprendre.\u00a0\u00bb<\/p>\n<p>Les re\u0301sultats obtenus, publie\u0301s dans la revue Current Biology, sont les premiers a\u0300 de\u0301montrer les effets de la contamination des eaux par ce psychotrope et son me\u0301tabolite sur le comportement des poissons sauvages. Un danger qu&rsquo;il est ne\u0301cessaire d&rsquo;e\u0301valuer alors que ces compose\u0301s sont de plus en plus souvent de\u0301tecte\u0301s dans les rivie\u0300res et les lacs, les syste\u0300mes des eaux use\u0301es e\u0301tant incapables de les e\u0301liminer efficacement.<\/p>\n<p>Les auteurs de cette nouvelle e\u0301tude rappellent que la consommation mondiale de drogues a augmente\u0301 d&rsquo;environ 20 % au cours des dix dernie\u0300res anne\u0301es. La cocai\u0308ne est l&rsquo;une des substances illicites les plus fre\u0301quemment de\u0301tecte\u0301es dans les environnements aquatiques du monde entier.<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <span style=\"color: #ff6600\">Niger<\/span>, suivez <span style=\"color: #ff6600\">Africa-Press<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Niger. Affecte\u0301s par l&rsquo;un des me\u0301tabolites de la cocai\u0308ne qui s&rsquo;accumule dans leur cerveau, les saumons de l&rsquo;Atlantique changent de comportement. C&rsquo;est la conclusion d&rsquo;une e\u0301tude internationale mene\u0301e non pas en laboratoire mais dans la nature. Des scientifiques ont e\u0301quipe\u0301 105 jeunes saumons de l&rsquo;Atlantique a\u0302ge\u0301s de deux ans, avec des implants capables [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":97391,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[29],"class_list":["post-97392","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-niger"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Comportement des saumons sauvages et pollution \u00e0 la coca\u00efne - niger<\/title>\n<meta name=\"description\" content=\"Affecte\u0301s par l&#039;un des me\u0301tabolites de la cocai\u0308ne qui s&#039;accumule dans leur cerveau, les saumons de l&#039;Atlantique changen ...\" \/>\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\/niger\/toutes-les-actualites\/comportement-des-saumons-sauvages-et-pollution-a-la-cocaine\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comportement des saumons sauvages et pollution \u00e0 la coca\u00efne\" \/>\n<meta property=\"og:description\" content=\"Affecte\u0301s par l&#039;un des me\u0301tabolites de la cocai\u0308ne qui s&#039;accumule dans leur cerveau, les saumons de l&#039;Atlantique changen ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/comportement-des-saumons-sauvages-et-pollution-a-la-cocaine\" \/>\n<meta property=\"og:site_name\" content=\"niger\" \/>\n<meta property=\"article:published_time\" content=\"2026-04-22T13:02:40+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-22T13:15:47+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/niger\/sites\/40\/2026\/04\/sm_1776851010.282782.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"899\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/comportement-des-saumons-sauvages-et-pollution-a-la-cocaine#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/comportement-des-saumons-sauvages-et-pollution-a-la-cocaine\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/niger\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Comportement des saumons sauvages et pollution \u00e0 la coca\u00efne\",\"datePublished\":\"2026-04-22T13:02:40+00:00\",\"dateModified\":\"2026-04-22T13:15:47+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/comportement-des-saumons-sauvages-et-pollution-a-la-cocaine\"},\"wordCount\":450,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/comportement-des-saumons-sauvages-et-pollution-a-la-cocaine#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/niger\/sites\/40\/2026\/04\/sm_1776851010.282782.jpg\",\"keywords\":[\"Niger\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/comportement-des-saumons-sauvages-et-pollution-a-la-cocaine#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/comportement-des-saumons-sauvages-et-pollution-a-la-cocaine\",\"url\":\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/comportement-des-saumons-sauvages-et-pollution-a-la-cocaine\",\"name\":\"Comportement des saumons sauvages et pollution \u00e0 la coca\u00efne - 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