{"id":9937,"date":"2026-01-18T19:28:33","date_gmt":"2026-01-18T18:28:33","guid":{"rendered":"https:\/\/www.imbe.fr\/?p=9937"},"modified":"2026-01-19T17:28:07","modified_gmt":"2026-01-19T16:28:07","slug":"a-la-recherche-de-lorigine-des-hydres-deau-douce-antillaises-retour-mission-au-senegal-20205","status":"publish","type":"post","link":"https:\/\/www.imbe.fr\/fr\/a-la-recherche-de-lorigine-des-hydres-deau-douce-antillaises-retour-mission-au-senegal-20205\/","title":{"rendered":"A la recherche de l\u2019origine des hydres d\u2019eau douce antillaises &#8211; Retour mission au S\u00e9n\u00e9gal &#8211; 2025."},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"9937\" class=\"elementor elementor-9937\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ad28a6b e-flex e-con-boxed e-con e-parent\" data-id=\"ad28a6b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-6373252 e-con-full e-flex e-con e-child\" data-id=\"6373252\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f155eea elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"f155eea\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"304\" data-end=\"875\">En 2019, dans le cadre d\u2019une <strong data-start=\"333\" data-end=\"373\">mission de 2 mois financ\u00e9e par l\u2019IRD<\/strong>, <a href=\"https:\/\/www.imbe.fr\/fr\/annuaire\/herve-macarie\/\">Herv\u00e9 Macarie<\/a> (\u00e9quipe <a href=\"https:\/\/www.imbe.fr\/fr\/recherche\/equipes-de-recherche\/equipe-santes-sante-et-toxicologie-environnementales\/\">SANTES<\/a>-IMBE), accompagn\u00e9 du Professeur <a href=\"https:\/\/www.pomona.edu\/directory\/people\/daniel-e-martinez\" target=\"_blank\" rel=\"noopener\">Daniel Martinez<\/a> (Pomona College, USA), a montr\u00e9 pour la premi\u00e8re fois que les <strong data-start=\"512\" data-end=\"534\">hydres d\u2019eau douce<\/strong>, petits cnidaires, \u00e9taient<a href=\"https:\/\/nuage.osupytheas.fr\/s\/acjXyLXPaAKPnT8?dir=\/&amp;editing=false&amp;openfile=true\" target=\"_blank\" rel=\"noopener\"> <strong data-start=\"562\" data-end=\"604\">ubiquistes en Guadeloupe et Martinique<\/strong><\/a>, et retrouv\u00e9es dans <strong data-start=\"622\" data-end=\"647\">50 % des points d\u2019eau<\/strong> prospect\u00e9s (rivi\u00e8res et \u00e9tangs). Cette d\u00e9couverte \u00e9tait inattendue, car ces organismes inf\u00e9od\u00e9s \u00e0 l\u2019eau douce ne traversent pas naturellement les \u00e9tendues d\u2019eau sal\u00e9e.<\/p><p data-start=\"877\" data-end=\"1530\">Ce r\u00e9sultat a renforc\u00e9 la pertinence de l\u2019utilisation de l\u2019<a href=\"https:\/\/amu.hal.science\/hal-03843265v1\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"941\" data-end=\"1000\">hydre comme mod\u00e8le pour \u00e9tudier l\u2019impact du chlord\u00e9cone<\/strong><\/a>, insecticide responsable d\u2019une crise environnementale et sanitaire aux Antilles. L\u2019analyse g\u00e9nomique des hydres antillaises a r\u00e9v\u00e9l\u00e9 <strong data-start=\"1194\" data-end=\"1220\">deux groupes distincts<\/strong> : un proche des hydres d\u2019Am\u00e9rique et un second qui pourrait \u00eatre li\u00e9 aux populations d&#8217;hydres africaines,\u00a0 l\u2019hypoth\u00e8se \u00e9tant que ce second groupe pourrait avoir \u00e9t\u00e9 <strong data-start=\"1382\" data-end=\"1424\">introduit par l\u2019homme depuis l\u2019Afrique<\/strong> lors de la traite des esclaves.\u00a0<\/p><p data-start=\"877\" data-end=\"1530\">Pour tester cette hypoth\u00e8se, un <strong data-start=\"1564\" data-end=\"1613\">financement de l\u2019AOI mission au Sud de l\u2019IMBE<\/strong> a permis \u00e0 Herv\u00e9 Macarie de se rendre au <strong data-start=\"1655\" data-end=\"1680\">S\u00e9n\u00e9gal en 2025<\/strong>, accompagn\u00e9 d\u2019<a href=\"https:\/\/www.imbe.fr\/fr\/annuaire\/herve-jourdan\/\">Herv\u00e9 Jourdan<\/a> (\u00e9quipe <a href=\"https:\/\/www.imbe.fr\/fr\/recherche\/equipes-de-recherche\/popco-populations-paysages-communautes-conservation\/\">POPCO<\/a>) et de Mamadou Sylla Barry. Sur <strong data-start=\"1755\" data-end=\"1781\">2560 km de prospection<\/strong>, ils ont explor\u00e9 le fleuve S\u00e9n\u00e9gal, le lac de Guiers, le fleuve Gambie et plusieurs points d\u2019eau autour de Dakar. <strong>Aucune hydre n\u2019a \u00e9t\u00e9 trouv\u00e9e<\/strong>, sugg\u00e9rant une densit\u00e9 tr\u00e8s faible dans les milieux prospect\u00e9s, avec des facteurs d\u00e9favorables tels que l\u2019eau saum\u00e2tre ou trop chaude.<\/p><p data-start=\"839\" data-end=\"992\">Cette recherche ouvre la voie pour mieux comprendre la <strong data-start=\"891\" data-end=\"945\">biog\u00e9ographie et l\u2019histoire des hydres antillaises<\/strong>, ainsi que leur r\u00f4le dans les \u00e9cosyst\u00e8mes insulaires.<\/p><p data-start=\"1104\" data-end=\"1245\"><strong data-start=\"1104\" data-end=\"1245\">Prochaine \u00e9tape\u202f:<\/strong> poursuivre l\u2019exploration en Afrique pour lever le voile sur l\u2019histoire m\u00e9connue de ces micro\u2011habitants des eaux douces.<strong data-start=\"1104\" data-end=\"1245\"> Nous vous tiendrons au courant des avanc\u00e9es!<\/strong><\/p><p data-start=\"877\" data-end=\"1530\">\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-cddb28f e-flex e-con-boxed e-con e-parent\" data-id=\"cddb28f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-6cc0d6c e-con-full e-flex e-con e-child\" data-id=\"6cc0d6c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-67e07fb elementor-widget elementor-widget-image\" data-id=\"67e07fb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"720\" height=\"405\" src=\"https:\/\/www.imbe.fr\/wp-content\/uploads\/2026\/01\/2025_04_Prospection_hydres_senegal_montage_photo.jpg\" class=\"attachment-2048x2048 size-2048x2048 wp-image-9945\" alt=\"\" srcset=\"https:\/\/www.imbe.fr\/wp-content\/uploads\/2026\/01\/2025_04_Prospection_hydres_senegal_montage_photo.jpg 720w, https:\/\/www.imbe.fr\/wp-content\/uploads\/2026\/01\/2025_04_Prospection_hydres_senegal_montage_photo-300x169.jpg 300w, https:\/\/www.imbe.fr\/wp-content\/uploads\/2026\/01\/2025_04_Prospection_hydres_senegal_montage_photo-18x10.jpg 18w\" sizes=\"(max-width: 720px) 100vw, 720px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>En 2019, dans le cadre d\u2019une mission de 2 mois financ\u00e9e par l\u2019IRD, Herv\u00e9 Macarie (\u00e9quipe SANTES-IMBE), accompagn\u00e9 du Professeur Daniel Martinez (Pomona College, USA), a montr\u00e9 pour la premi\u00e8re [&hellip;]<\/p>\n","protected":false},"author":300,"featured_media":9945,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"class_list":["post-9937","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mission-de-terrain"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/posts\/9937","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/users\/300"}],"replies":[{"embeddable":true,"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/comments?post=9937"}],"version-history":[{"count":10,"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/posts\/9937\/revisions"}],"predecessor-version":[{"id":9949,"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/posts\/9937\/revisions\/9949"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/media\/9945"}],"wp:attachment":[{"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/media?parent=9937"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/categories?post=9937"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/tags?post=9937"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}