{"id":1529,"date":"2021-05-05T18:20:01","date_gmt":"2021-05-05T22:20:01","guid":{"rendered":"https:\/\/newsletter.glft.org\/?p=1529"},"modified":"2021-09-02T12:27:04","modified_gmt":"2021-09-02T16:27:04","slug":"lake-whitefish-stocking-feasibility","status":"publish","type":"post","link":"https:\/\/www.glft.org\/fr\/lake-whitefish-stocking-feasibility\/","title":{"rendered":"Une approche de bureau pour \u00e9valuer la faisabilit\u00e9 de l&#039;empoissonnement du grand cor\u00e9gone"},"content":{"rendered":"<div id=\"fws_69eec64c95ef9\"  data-column-margin=\"default\" data-midnight=\"dark\"  class=\"wpb_row vc_row-fluid vc_row\"  style=\"padding-top: 0px; padding-bottom: 0px; \"><div class=\"row-bg-wrap\" data-bg-animation=\"none\" data-bg-overlay=\"false\"><div class=\"inner-wrap\"><div class=\"row-bg viewport-desktop\"  style=\"\"><\/div><\/div><\/div><div class=\"row_col_wrap_12 col span_12 dark left\">\n\t<div  class=\"vc_col-sm-12 wpb_column column_container vc_column_container col no-extra-padding inherit_tablet inherit_phone\"  data-padding-pos=\"all\" data-has-bg-color=\"false\" data-bg-color=\"\" data-bg-opacity=\"1\" data-animation=\"\" data-delay=\"0\" >\n\t\t<div class=\"vc_column-inner\" >\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"img-with-aniamtion-wrap center\" data-max-width=\"100%\" data-max-width-mobile=\"default\" data-shadow=\"none\" data-animation=\"fade-in\" >\r\n      <div class=\"inner\">\r\n        <div class=\"hover-wrap\"> \r\n          <div class=\"hover-wrap-inner\">\r\n            <img loading=\"lazy\" decoding=\"async\" class=\"img-with-animation skip-lazy\" data-delay=\"0\" height=\"1335\" width=\"2000\" data-animation=\"fade-in\" src=\"https:\/\/www.glft.org\/wp-content\/uploads\/2021\/05\/great-lakes-whitefish.jpg\" alt=\"\" srcset=\"https:\/\/www.glft.org\/wp-content\/uploads\/2021\/05\/great-lakes-whitefish.jpg 2000w, https:\/\/www.glft.org\/wp-content\/uploads\/2021\/05\/great-lakes-whitefish-300x200.jpg 300w, https:\/\/www.glft.org\/wp-content\/uploads\/2021\/05\/great-lakes-whitefish-1024x684.jpg 1024w, https:\/\/www.glft.org\/wp-content\/uploads\/2021\/05\/great-lakes-whitefish-768x513.jpg 768w, https:\/\/www.glft.org\/wp-content\/uploads\/2021\/05\/great-lakes-whitefish-1536x1025.jpg 1536w, https:\/\/www.glft.org\/wp-content\/uploads\/2021\/05\/great-lakes-whitefish-900x600.jpg 900w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\" \/>\r\n          <\/div>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n<div class=\"wpb_text_column wpb_content_element  vc_custom_1620676955389\" >\r\n\t<div class=\"wpb_wrapper\">\r\n\t\t<h2>Arri\u00e8re-plan<\/h2>\n<p>Grand cor\u00e9gone (<em>Cor\u00e9gone clupeaformis<\/em>) les effectifs sont en baisse substantielle dans les Grands Lacs, ce qui pr\u00e9occupe les gestionnaires des p\u00eaches et les p\u00eacheurs commerciaux et tribaux qui accordent une grande importance \u00e0 l&#039;esp\u00e8ce. Le public partage de plus en plus cette inqui\u00e9tude en raison de la couverture m\u00e9diatique qui met en lumi\u00e8re les facteurs de stress de la p\u00eache et les perspectives de r\u00e9tablissement. Cette \u00e9dition de <em>Notes de recherche<\/em> met en \u00e9vidence les r\u00e9centes contributions de recherche sur le grand cor\u00e9gone soutenues par le Great Lakes Fishery Trust.<\/p>\n<p>En 2019, une \u00e9quipe du Centre quantitatif des p\u00eaches de l\u2019Universit\u00e9 d\u2019\u00c9tat du Michigan a \u00e9valu\u00e9 la faisabilit\u00e9 de l\u2019empoissonnement de grands cor\u00e9gones pour r\u00e9habiliter ou compl\u00e9ter les p\u00eacheries des Grands Lacs. James Bence, Travis Brenden et Emily Liljestrand, membres de l\u2019\u00e9quipe de recherche, ont cherch\u00e9 \u00e0 d\u00e9terminer le nombre de poissons \u00e0 empoissonner qui serait n\u00e9cessaire \u00e0 diff\u00e9rentes \u00e9tapes du cycle de vie pour produire des avantages substantiels ainsi que les ressources n\u00e9cessaires pour produire ces chiffres. Leur analyse documentaire s\u2019est concentr\u00e9e sur les lacs Michigan et Huron, en utilisant les informations disponibles dans la litt\u00e9rature primaire et secondaire combin\u00e9es aux points de vue d\u2019experts sur l\u2019\u00e9levage de poissons dans la r\u00e9gion des Grands Lacs.<\/p>\n<p>Le projet visait \u00e0 comprendre si l&#039;empoissonnement de jeunes poissons de lac blanc ou de cor\u00e9gones d&#039;un an pouvait produire des quantit\u00e9s de poissons suffisamment importantes pour compenser le d\u00e9clin de la population. Le projet de recherche comprenait les \u00e9l\u00e9ments suivants :<\/p>\n<ul>\n<li>Identifier les taux de survie plausibles pour les diff\u00e9rents stades de vie du cor\u00e9gone de lac gr\u00e2ce \u00e0 un examen de la litt\u00e9rature primaire et secondaire<\/li>\n<li>Estimez les co\u00fbts associ\u00e9s \u00e0 l&#039;\u00e9levage du cor\u00e9gone de lac jusqu&#039;\u00e0 des stades de vie ult\u00e9rieurs gr\u00e2ce \u00e0 des consultations d&#039;experts<\/li>\n<li>Calculer le rendement anticip\u00e9 par recrue pour la zone d&#039;\u00e9tude gr\u00e2ce \u00e0 l&#039;\u00e9valuation du stock de cor\u00e9gone de lac existant<\/li>\n<li>\u00c9laborer une analyse co\u00fbts-b\u00e9n\u00e9fices de plusieurs sc\u00e9narios d\u2019empoissonnement de grands cor\u00e9gones<\/li>\n<\/ul>\n<div id=\"attachment_1534\" style=\"width: 1210px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1534\" class=\"wp-image-1534 size-full\" src=\"https:\/\/newsletter.glft.org\/wp-content\/uploads\/2021\/05\/Lake-whitefish.jpeg\" alt=\"\" width=\"1200\" height=\"579\" \/><p id=\"caption-attachment-1534\" class=\"wp-caption-text\">Grand cor\u00e9gone (Coregonus clupeaformis)<\/p><\/div>\n<h2>Principales conclusions<\/h2>\n<p>L&#039;\u00e9quipe de recherche a constat\u00e9 que l&#039;empoissonnement des alevins d&#039;automne ou des jeunes d&#039;un an offre les meilleures chances de survie. Cependant, les r\u00e9sultats mod\u00e9lis\u00e9s par l&#039;\u00e9quipe de recherche sugg\u00e8rent que les ressources financi\u00e8res n\u00e9cessaires \u00e0 la mise en place d&#039;un programme d&#039;empoissonnement d\u00e9passeraient la valeur \u00e9conomique du rendement suppl\u00e9mentaire anticip\u00e9.<\/p>\n<h2>Au-del\u00e0 des principales conclusions<\/h2>\n<p>Les taux de survie r\u00e9els des poissons ensemenc\u00e9s sont tr\u00e8s incertains et l&#039;\u00e9quipe aurait pu utiliser des valeurs alternatives plausibles dans ses calculs, ce qui aurait donn\u00e9 des r\u00e9sultats diff\u00e9rents des sc\u00e9narios d&#039;ensemencement. Ces r\u00e9serves mises \u00e0 part, en effectuant l&#039;analyse co\u00fbts-avantages, l&#039;\u00e9quipe de recherche a pu fournir les co\u00fbts anticip\u00e9s de l&#039;ensemencement de grands cor\u00e9gones en quantit\u00e9s qui permettent de r\u00e9cup\u00e9rer le rendement. Les travaux ont \u00e9galement d\u00e9montr\u00e9 comment les informations facilement disponibles peuvent \u00eatre compil\u00e9es et synth\u00e9tis\u00e9es pour \u00e9laborer une analyse co\u00fbts-avantages concernant l&#039;ensemencement comme mesure potentielle de gestion des p\u00eaches dans les Grands Lacs. De plus, les recherches de l&#039;\u00e9quipe sugg\u00e8rent que des travaux sont n\u00e9cessaires pour \u00e9valuer la survie en d\u00e9but de vie des grands cor\u00e9gones \u00e9lev\u00e9s en \u00e9closerie dans les Grands Lacs et pour r\u00e9duire les co\u00fbts de l&#039;\u00e9levage des grands cor\u00e9gones.<\/p>\n<h2>Collaboration en recherche<\/h2>\n<p>Les recherches et les connaissances de l&#039;\u00e9quipe sur la p\u00eache au grand cor\u00e9gone, l&#039;\u00e9levage de poissons dans les Grands Lacs et les co\u00fbts associ\u00e9s aux m\u00e9thodes d&#039;\u00e9levage du grand cor\u00e9gone \u00e0 diff\u00e9rents stades de vie ont \u00e9t\u00e9 am\u00e9lior\u00e9es gr\u00e2ce \u00e0 des interactions avec des experts du minist\u00e8re de l&#039;Ontario, du d\u00e9partement des ressources naturelles du Michigan, du US Fish and Wildlife Service, de la tribu des Indiens Chippewa de Sault, des bandes indiennes Odawa de Little Traverse Bay et de la communaut\u00e9 indienne de Bay Mills. Ces organismes de gestion \u00e9tatiques, f\u00e9d\u00e9raux et tribaux ont fourni leur expertise pour d\u00e9terminer si les taux de survie identifi\u00e9s \u00e0 partir des sources de l&#039;\u00e9quipe de recherche et des \u00e9valuations ult\u00e9rieures \u00e9taient fiables.<\/p>\n\t<\/div>\r\n<\/div>\r\n\r\n\r\n\r\n\n\t\t\t<\/div> \n\t\t<\/div>\n\t<\/div> \n<\/div><\/div>\r\n\t\t<div id=\"fws_69eec64c96b88\"  data-column-margin=\"default\" data-midnight=\"dark\" data-top-percent=\"2%\" data-bottom-percent=\"2%\"  class=\"wpb_row vc_row-fluid vc_row  right_padding_2pct left_padding_2pct\"  style=\"padding-top: calc(100vw * 0.02); padding-bottom: calc(100vw * 0.02); \"><div class=\"row-bg-wrap\" data-bg-animation=\"none\" data-bg-overlay=\"false\"><div class=\"inner-wrap\"><div class=\"row-bg viewport-desktop using-bg-color\"  style=\"background-color: #ffffff; \"><\/div><\/div><\/div><div class=\"row_col_wrap_12 col span_12 dark left\">\n\t<div style=\"\" class=\"vc_col-sm-12 wpb_column column_container vc_column_container col no-extra-padding inherit_tablet inherit_phone\" data-using-bg=\"true\" data-padding-pos=\"all\" data-has-bg-color=\"true\" data-bg-color=\"#ffffff\" data-bg-opacity=\"1\" data-animation=\"\" data-delay=\"0\" >\n\t\t<div class=\"vc_column-inner\" ><div class=\"column-bg-overlay-wrap\" data-bg-animation=\"none\"><div class=\"column-bg-overlay\" style=\"opacity: 1; background-color: #ffffff;\"><\/div><\/div>\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<blockquote class=\"nectar_single_testimonial\" data-color=\"accent-color\" data-style=\"small_modern\"><div class=\"inner\"data-custom-color=\"true\" style=\"color: #000000;\"> <p><span class=\"open-quote\">\u201d<\/span>Je pense qu\u2019un r\u00e9sultat important de ce travail est qu\u2019il pourrait concentrer la recherche sur la survie pr\u00e9coce du cor\u00e9gone de lac \u00e9lev\u00e9 en \u00e9closerie ou sur des approches viables pour r\u00e9duire les co\u00fbts de l\u2019\u00e9levage du cor\u00e9gone de lac. <\/p><span class=\"wrap\"><span>James Bence, Ph.D.<\/span><span class=\"title\">Chercheur principal<\/span><\/span><\/div><\/blockquote>\n\t\t\t<\/div> \n\t\t<\/div>\n\t<\/div> \n<\/div><\/div>\r\n\t\t<div id=\"fws_69eec64c97081\"  data-column-margin=\"default\" data-midnight=\"dark\"  class=\"wpb_row vc_row-fluid vc_row\"  style=\"padding-top: 0px; padding-bottom: 0px; \"><div class=\"row-bg-wrap\" data-bg-animation=\"none\" data-bg-overlay=\"false\"><div class=\"inner-wrap\"><div class=\"row-bg viewport-desktop\"  style=\"\"><\/div><\/div><\/div><div class=\"row_col_wrap_12 col span_12 dark left\">\n\t<div  class=\"vc_col-sm-12 wpb_column column_container vc_column_container col no-extra-padding inherit_tablet inherit_phone\"  data-padding-pos=\"all\" data-has-bg-color=\"false\" data-bg-color=\"\" data-bg-opacity=\"1\" data-animation=\"\" data-delay=\"0\" >\n\t\t<div class=\"vc_column-inner\" >\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t\r\n<div class=\"wpb_text_column wpb_content_element\" >\r\n\t<div class=\"wpb_wrapper\">\r\n\t\t<h2>Apprendre encore plus<\/h2>\n<p>Pour plus d&#039;informations sur la conception de l&#039;\u00e9tude, les r\u00e9sultats et les implications, consultez le <a href=\"https:\/\/www.canr.msu.edu\/qfc\/publications\/qfc-technical-reports\" target=\"_blank\" rel=\"noopener\">Rapport technique du Centre de p\u00eache quantitative<\/a> du D\u00e9partement des p\u00eaches et de la faune de l&#039;Universit\u00e9 d&#039;\u00c9tat du Michigan. Pour toute question, contactez le chercheur principal, James Bence, Ph.D., <a href=\"mailto:bence@msu.edu\">bence@msu.edu<\/a>.<\/p>\n<h2>Clause de non-responsabilit\u00e9<\/h2>\n<p><em>Notes de recherche <\/em>comprend les r\u00e9sultats des projets financ\u00e9s par le GLFT qui contribuent \u00e0 l&#039;ensemble des connaissances scientifiques sur la p\u00eache dans les Grands Lacs. Les conclusions des chercheurs et les r\u00e9sum\u00e9s des r\u00e9sultats des subventions ne constituent pas une approbation ou une position du GLFT et sont fournis pour mieux faire conna\u00eetre les r\u00e9sultats des projets et fournir des informations pertinentes aux chercheurs et aux gestionnaires des p\u00eaches.<\/p>\n\t<\/div>\r\n<\/div>\r\n\r\n\r\n\r\n\n\t\t\t<\/div> \n\t\t<\/div>\n\t<\/div> \n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Le nombre de grands cor\u00e9gones diminue consid\u00e9rablement dans les Grands Lacs, ce qui inqui\u00e8te ceux qui accordent une grande valeur \u00e0 cette esp\u00e8ce. D\u00e9couvrez les r\u00e9centes contributions \u00e0 la recherche sur le grand cor\u00e9gone soutenues par le GLFT.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[4],"tags":[],"class_list":{"0":"post-1529","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-research-notes"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>A Desktop Approach to Assessing Lake Whitefish Stocking Feasibility - Great Lakes Fishery Trust<\/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.glft.org\/fr\/lake-whitefish-stocking-feasibility\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A Desktop Approach to Assessing Lake Whitefish Stocking Feasibility - Great Lakes Fishery Trust\" \/>\n<meta property=\"og:description\" content=\"Lake whitefish numbers are declining substantially in the Great Lakes, concerning those who highly value the species. Learn about recent research contributions on lake whitefish supported by the GLFT.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.glft.org\/fr\/lake-whitefish-stocking-feasibility\/\" \/>\n<meta property=\"og:site_name\" content=\"Great Lakes Fishery Trust\" \/>\n<meta property=\"article:published_time\" content=\"2021-05-05T22:20:01+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-09-02T16:27:04+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/newsletter.glft.org\/wp-content\/uploads\/2021\/05\/Lake-whitefish.jpeg\" \/>\n<meta name=\"author\" content=\"glftstaging\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"glftstaging\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.glft.org\\\/lake-whitefish-stocking-feasibility\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.glft.org\\\/lake-whitefish-stocking-feasibility\\\/\"},\"author\":{\"name\":\"glftstaging\",\"@id\":\"https:\\\/\\\/www.glft.org\\\/#\\\/schema\\\/person\\\/4d48ede5625620bd4df9749c84e33e56\"},\"headline\":\"A Desktop Approach to Assessing Lake Whitefish Stocking Feasibility\",\"datePublished\":\"2021-05-05T22:20:01+00:00\",\"dateModified\":\"2021-09-02T16:27:04+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.glft.org\\\/lake-whitefish-stocking-feasibility\\\/\"},\"wordCount\":1151,\"publisher\":{\"@id\":\"https:\\\/\\\/www.glft.org\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.glft.org\\\/lake-whitefish-stocking-feasibility\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/newsletter.glft.org\\\/wp-content\\\/uploads\\\/2021\\\/05\\\/Lake-whitefish.jpeg\",\"articleSection\":[\"Research Notes\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.glft.org\\\/lake-whitefish-stocking-feasibility\\\/\",\"url\":\"https:\\\/\\\/www.glft.org\\\/lake-whitefish-stocking-feasibility\\\/\",\"name\":\"A Desktop Approach to Assessing Lake Whitefish Stocking Feasibility - 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