{"id":2172,"date":"2025-04-30T14:25:38","date_gmt":"2025-04-30T18:25:38","guid":{"rendered":"https:\/\/www.glft.org\/?p=2172"},"modified":"2025-04-30T14:25:38","modified_gmt":"2025-04-30T18:25:38","slug":"cracking-the-code-of-lake-whitefish-otoliths-complicates-stock-delineation","status":"publish","type":"post","link":"https:\/\/www.glft.org\/de\/cracking-the-code-of-lake-whitefish-otoliths-complicates-stock-delineation\/","title":{"rendered":"Das Knacken des Codes der Otolithen von See-Wei\u00dffischen erschwert die Bestandsabgrenzung"},"content":{"rendered":"<div id=\"fws_69e1036a80b6a\"  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  vc_custom_1745949022401\" >\r\n\t<div class=\"wpb_wrapper\">\r\n\t\t<p>W\u00e4hrend <a href=\"https:\/\/www.michigan.gov\/dnr\/education\/michigan-species\/fish-species\/whitefish\" target=\"_blank\" rel=\"noopener\">See-Wei\u00dffisch<\/a> W\u00e4hrend die Populationen im gr\u00f6\u00dften Teil des Michigansees r\u00fcckl\u00e4ufig sind, bleiben die Populationen in der Green Bay stabil. Das Verst\u00e4ndnis der Geburtsorte der Green Bay-Wei\u00dffische k\u00f6nnte Forschern helfen, einzelne Best\u00e4nde abzugrenzen \u2013 ein wichtiges Managementinstrument. Ziel dieses Pilotprojekts war der Aufbau einer mikrochemischen Otolithenbibliothek zur Bestimmung der Geburtsorte von Wei\u00dffischen. Dabei wurde festgestellt, dass die Otolithenlarven der Wei\u00dffische in erster Linie ihren m\u00fctterlichen und nicht ihren Geburtsort widerspiegeln.<\/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_69e1036a81037\"  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<h3>Wichtige Erkenntnisse<\/h3>\n<ul>\n<li>Aus den Eiern der Wei\u00dffische, die von Weibchen gesammelt wurden, die in einem Fluss gefangen und anschlie\u00dfend in einem anderen Fluss ausgebr\u00fctet wurden, schl\u00fcpften Wei\u00dffischlarven, deren Otolithen eher den Fluss widerspiegelten, in dem ihre Mutter gefangen wurde, als den Ort, an dem sie ausgebr\u00fctet wurden.<\/li>\n<li>Otolithen von Larven der Seemar\u00e4ne k\u00f6nnen noch lange nach der Auswanderung vom Brutplatz bis ins pelagische Treibstadium von m\u00fctterlichen Einfl\u00fcssen gepr\u00e4gt sein. Dies liegt daran, dass die Otolithensignaturen von Larvenfischen die Aufzuchtumgebung erst widerspiegeln, wenn die Fische ihren Dottersack vollst\u00e4ndig absorbiert haben, was bei Seemar\u00e4nen etwa 15 Tage nach dem Schl\u00fcpfen dauert.<\/li>\n<\/ul>\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_69e1036a8120a\"  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<h3>Wichtige Ergebnisse der Forschung zu Wei\u00dffischen im See<\/h3>\n<p>Diese Studie kommt zu dem Schluss, dass die Mikrochemie der Otolithen nicht zur Bestimmung des Geburtsortes von Seesaiblingen verwendet werden kann, da die Otolithen eher m\u00fctterliche als br\u00fctende Einfl\u00fcsse widerspiegeln. Fr\u00fchere Studien haben Unterschiede in der Mikrochemie der Otolithen bei Gruppen anderer Fischarten der Gro\u00dfen Seen festgestellt, die in unterschiedlichen Umgebungen inkubiert wurden. Diese Studie legt jedoch nahe, dass diese Unterschiede m\u00f6glicherweise nicht auf Umweltver\u00e4nderungen, sondern m\u00fctterliche Einfl\u00fcsse zur\u00fcckzuf\u00fchren sind. Dies ist eine Warnung vor der Verwendung von Studien zur Mikrochemie der Otolithen zur Abgrenzung von Fischpopulationen in den Gro\u00dfen Seen.<\/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_69e1036a81394\"  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-6 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>Mehr erfahren<\/h2>\n<p>Bei Fragen wenden Sie sich bitte an den leitenden Pr\u00fcfer, Dr. Patrick Forsythe, unter <a href=\"mailto:forsythp@uwgb.edu\">forsythp@uwgb.edu<\/a>.<\/p>\n<p><strong>Haftungsausschluss<\/strong><\/p>\n<p>Research Notes enth\u00e4lt die Ergebnisse von GLFT-finanzierten Projekten, die zum wissenschaftlichen Wissen \u00fcber die Fischerei in den Gro\u00dfen Seen beitragen. Die Forschungsergebnisse und Zusammenfassungen der F\u00f6rderergebnisse stellen keine Billigung oder Stellungnahme der GLFT dar und sollen das Bewusstsein f\u00fcr Projektergebnisse sch\u00e4rfen und Forschern und Fischereimanagern relevante Informationen liefern. Die Forschungsergebnisse sind oft vorl\u00e4ufig und wurden m\u00f6glicherweise nicht von Experten begutachtet.<\/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\n\t<div style=\" color: #2c475d;margin-top: 15px; \" class=\"vc_col-sm-6 drk-back-link wpb_column column_container vc_column_container col padding-3-percent inherit_tablet inherit_phone\" data-using-bg=\"true\" data-padding-pos=\"left-right\" data-has-bg-color=\"true\" data-bg-color=\"rgba(44,71,93,0.05)\" 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: rgba(44,71,93,0.05);\"><\/div><\/div>\n\t\t\t<div class=\"wpb_wrapper\">\n\t\t\t\t<div class=\"divider-wrap\" data-alignment=\"default\"><div style=\"height: 25px;\" class=\"divider\"><\/div><\/div><h2 style=\"font-size: 30px;color: #2c475d;text-align: left;font-family:PT Sans;font-weight:400;font-style:normal\" class=\"vc_custom_heading\" >Verwandte Lekt\u00fcre<\/h2><div class=\"divider-wrap\" data-alignment=\"default\"><div style=\"height: 10px;\" class=\"divider\"><\/div><\/div><div class=\"nectar-fancy-ul\" data-list-icon=\"fa fa-search\" data-animation=\"false\" data-animation-delay=\"0\" data-color=\"extra-color-3\" data-spacing=\"10px\" data-alignment=\"left\"> \n<ul>\n<li><a href=\"https:\/\/www.glft.org\/de\/recruitment-dynamics-of-lake-whitefish-and-cisco-in-the-upper-great-lakes\/\">Rekrutierungsdynamik von Lake Whitefish und Cisco in den oberen Gro\u00dfen Seen<\/a><\/li>\n<li><a href=\"\/de\/using-genomics-techniques-to-delineate-lake-michigan-whitefish-stocks\/\">Einsatz genomischer Methoden zur Abgrenzung der Wei\u00dffischbest\u00e4nde im Michigansee<\/a><\/li>\n<li><a href=\"https:\/\/www.glft.org\/de\/exploring-disease-susceptibility-and-its-impact-on-lake-whitefish-recruitment\/\">Untersuchung der Krankheitsanf\u00e4lligkeit und ihrer Auswirkungen auf die Rekrutierung von Wei\u00dffischen im See<\/a><\/li>\n<li><a href=\"https:\/\/www.ices.dk\/news-and-events\/news-archive\/news\/Pages\/EC_Brown.aspx\" target=\"_blank\" rel=\"noopener\">Fast sechs Jahrzehnte Rekrutierungstrends f\u00fcr Lake Whitefish und Cisco in den Gro\u00dfen Seen<\/a><\/li>\n<\/ul>\n <\/div><div class=\"divider-wrap\" data-alignment=\"default\"><div style=\"height: 10px;\" class=\"divider\"><\/div><\/div>\n\t\t\t<\/div> \n\t\t<\/div>\n\t<\/div> \n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Diese Ausgabe der Research Notes beleuchtet die Forschung zum Ursprung der See-Wei\u00dffische in der Green Bay und stellt fest, ob diese Forschung den Forschern dabei helfen k\u00f6nnte, einzelne Best\u00e4nde abzugrenzen.<\/p>","protected":false},"author":7,"featured_media":2173,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[4],"tags":[],"class_list":{"0":"post-2172","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-research-notes"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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