{"id":5984,"date":"2021-08-16T10:44:39","date_gmt":"2021-08-16T08:44:39","guid":{"rendered":"https:\/\/www.caribaea.org\/?p=5984"},"modified":"2021-08-23T09:54:41","modified_gmt":"2021-08-23T07:54:41","slug":"surpeche-et-reglementation-comment-determiner-la-maturite-sexuelle-des-langoustes","status":"publish","type":"post","link":"https:\/\/www.caribaea.org\/fr\/surpeche-et-reglementation-comment-determiner-la-maturite-sexuelle-des-langoustes\/","title":{"rendered":"Surp\u00eache et r\u00e9glementation : Comment d\u00e9terminer la maturit\u00e9 sexuelle des langoustes ?"},"content":{"rendered":"<p><strong>La p\u00eache de la langouste blanche (<em>Panulirus argus<\/em>) g\u00e9n\u00e8re chaque ann\u00e9e pr\u00e8s d\u2019un milliard de dollars. Une telle exploitation intensive peut repr\u00e9senter une menace pour l\u2019esp\u00e8ce. Une r\u00e9glementation adapt\u00e9e en mati\u00e8re de p\u00eache, notamment au niveau local, s\u2019av\u00e8re donc de prime importance pour en pr\u00e9server les populations. La mise en place de ces mesures n\u00e9cessite une bonne connaissance de la biologie de l\u2019esp\u00e8ce, impliquant notamment de savoir d\u00e9terminer de mani\u00e8re fiable la maturit\u00e9 sexuelle de ces crustac\u00e9s.<\/strong><!--more--><\/p>\n<p>Dans une \u00e9tude r\u00e9cemment publi\u00e9e, Nicole Atherley et ses coll\u00e8gues se sont attach\u00e9s \u00e0 d\u00e9terminer la maturit\u00e9 sexuelle de langoustes blanches en utilisant diff\u00e9rentes m\u00e9thodes. Les crustac\u00e9s ont \u00e9t\u00e9 pr\u00e9lev\u00e9s chaque mois autour de Saint-Kitts-et-Nevis pendant plus d\u2019un an et demi. Au total, plus de 300 langoustes, m\u00e2les et femelles, ont \u00e9t\u00e9 examin\u00e9es.<\/p>\n<p>Les chercheurs ont diff\u00e9renci\u00e9 la maturit\u00e9s physiologique, caract\u00e9ris\u00e9e par des gonades matures et aptes \u00e0 produire des ovules ou des spermatozo\u00efdes, et la maturit\u00e9 fonctionnelle, correspondant chez les femelles au d\u00e9veloppement de certaines caract\u00e9ristiques indispensables \u00e0 l&rsquo;accouplement (spermatophore bien positionn\u00e9, \u0153ufs pr\u00e9sents sur l&rsquo;abdomen, etc.). La maturit\u00e9 sexuelle a \u00e9t\u00e9 d\u00e9termin\u00e9e gr\u00e2ce \u00e0 une inspection globale des individus, des analyse histologiques (observations au microscope) des gonades, et le calcul d\u2019un indice dit gonado-somatique, souvent utilis\u00e9 chez les crustac\u00e9s, et prenant en compte l\u2019importance du poids des gonades par rapport \u00e0 la longueur des individus.<\/p>\n<p>Ces analyses ont permis de pr\u00e9ciser la m\u00e9thodologie \u00e0 appliquer pour des r\u00e9sultats fiables, tout en apportant des connaissances pr\u00e9cieuses sur la biologie de l\u2019esp\u00e8ce. Le suivi mensuel a notamment permis de r\u00e9v\u00e9ler la p\u00e9riode critique pour la reproduction des langoustes, situ\u00e9e de mars \u00e0 mai, et de pr\u00e9ciser la taille \u00e0 partir de laquelle les individus peuvent \u00eatre consid\u00e9r\u00e9s comme sexuellement matures et donc aptes \u00e0 se reproduire. Ces deux param\u00e8tres sont particuli\u00e8rement importants puisqu\u2019ils permettent de d\u00e9finir des mesures de restriction de p\u00eache appropri\u00e9es, respectivement la saison o\u00f9 la p\u00eache peut \u00eatre autoris\u00e9e (hors p\u00e9riode de reproduction) et une taille minimale en-dessous de laquelle les individus ne devraient pas \u00eatre pr\u00e9lev\u00e9s.<\/p>\n<p>Ainsi que le soulignent les auteurs, la taille \u00e0 laquelle les crustac\u00e9s sont capables de se reproduire peut varier, notamment en relation avec des param\u00e8tres climatiques ou la pression de p\u00eache. Ils encouragent donc des \u00e9tudes similaires dans les autres territoires o\u00f9 l\u2019esp\u00e8ce est pr\u00e9sente afin de d\u00e9terminer des mesures adapt\u00e9es localement.<\/p>\n<p>&nbsp;<\/p>\n<h5><span style=\"color: #e95b2b;\"><strong>A propos de l\u2019auteur<\/strong><\/span><\/h5>\n<p>Originaire de la Barbade, Nicole Atherley est actuellement en fin de doctorat \u00e0 l&rsquo;Universit\u00e9 Ross de Saint Kitts &amp; Nevis. Son doctorat a \u00e9t\u00e9 rendu possible gr\u00e2ce au programme de formation de jeunes experts carib\u00e9ens mis en place par Caribaea Initiative.<\/p>\n<p>&nbsp;<\/p>\n<h5><span style=\"color: #e95b2b;\"><strong>R\u00e9f\u00e9rence<\/strong><\/span><\/h5>\n<p><strong>Atherley, N.A.M.<\/strong>, Dennis, M.M., Behringer, D.C. &amp; Freeman, M.A. (2021). Size at sexual maturity and seasonal reproductive activity of the Caribbean spiny lobster, <em>Panulirus argus<\/em>. Marine Ecology Progress Series 671: 129-145.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La p\u00eache de la langouste blanche (Panulirus argus) g\u00e9n\u00e8re chaque ann\u00e9e pr\u00e8s d\u2019un milliard de dollars. Une telle exploitation intensive peut repr\u00e9senter une menace pour l\u2019esp\u00e8ce. Une r\u00e9glementation adapt\u00e9e en mati\u00e8re de p\u00eache, notamment au niveau local, s\u2019av\u00e8re donc de prime importance pour en pr\u00e9server les populations. La mise en place de ces mesures n\u00e9cessite [&hellip;]<\/p>\n","protected":false},"author":34,"featured_media":5985,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5984","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classifiee"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Surp\u00eache et r\u00e9glementation : Comment d\u00e9terminer la maturit\u00e9 sexuelle des langoustes ? - Caribaea Initiative<\/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.caribaea.org\/en\/overfishing-and-regulation-how-to-determine-the-sexual-maturity-of-lobsters\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Surp\u00eache et r\u00e9glementation : Comment d\u00e9terminer la maturit\u00e9 sexuelle des langoustes ? - Caribaea Initiative\" \/>\n<meta property=\"og:description\" content=\"La p\u00eache de la langouste blanche (Panulirus argus) g\u00e9n\u00e8re chaque ann\u00e9e pr\u00e8s d\u2019un milliard de dollars. Une telle exploitation intensive peut repr\u00e9senter une menace pour l\u2019esp\u00e8ce. Une r\u00e9glementation adapt\u00e9e en mati\u00e8re de p\u00eache, notamment au niveau local, s\u2019av\u00e8re donc de prime importance pour en pr\u00e9server les populations. La mise en place de ces mesures n\u00e9cessite [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.caribaea.org\/en\/overfishing-and-regulation-how-to-determine-the-sexual-maturity-of-lobsters\/\" \/>\n<meta property=\"og:site_name\" content=\"Caribaea Initiative\" \/>\n<meta property=\"article:published_time\" content=\"2021-08-16T08:44:39+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-08-23T07:54:41+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.caribaea.org\/wp-content\/uploads\/2021\/08\/panulirus2-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"1387\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Sophie Labaude\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Sophie Labaude\" \/>\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\":\"WebPage\",\"@id\":\"https:\/\/www.caribaea.org\/en\/overfishing-and-regulation-how-to-determine-the-sexual-maturity-of-lobsters\/\",\"url\":\"https:\/\/www.caribaea.org\/en\/overfishing-and-regulation-how-to-determine-the-sexual-maturity-of-lobsters\/\",\"name\":\"Surp\u00eache et r\u00e9glementation : Comment d\u00e9terminer la maturit\u00e9 sexuelle des langoustes ? 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