{"id":50441,"date":"2023-08-18T13:10:55","date_gmt":"2023-08-18T13:10:55","guid":{"rendered":"https:\/\/matis.is\/?p=50441"},"modified":"2023-08-18T13:10:57","modified_gmt":"2023-08-18T13:10:57","slug":"rapid-and-coupled-phenotypic-and-genetic-divergence-in-icelandic-arctic-charr","status":"publish","type":"post","link":"https:\/\/matis.is\/en\/greinar\/rapid-and-coupled-phenotypic-and-genetic-divergence-in-icelandic-arctic-charr\/","title":{"rendered":"Rapid and coupled phenotypic and genetic divergence in Icelandic Arctic Charr."},"content":{"rendered":"<p>Resource polymorphism has been proposed as an important phase of diversification and speciation in vertebrates. Studies of fish in young lakes of the Northern Hemisphere indicate variably advanced cases of adaptive trophic diversification. We have previously proposed a scheme describing this variation in terms of a gradient of resource-based polymorphic traits, emphasizing flexible behavior in early phases and morphological divergence in more advanced phases. Here, we present data on Arctic char (<em>Salvelinus alpinus<\/em>) in Icelandic lakes exhibiting a variable degree of phenotypic and genotypic segregation. We show that (<em>i<\/em>) the morphs are at different levels of phenotypic segregation and reproductive isolation and in one case completely reproductively isolated, (<em>ii<\/em>) morphs within lakes appear to be of intralacustrine origin, and (<em>iii<\/em>) the morphological and genetic divergence of morphs is correlated, suggesting a role for trophic adaptation as a driving force in morph segregation.<\/p>\n\n\n\n<p><a href=\"https:\/\/cdnsciencepub.com\/doi\/10.1139\/f99-245\" target=\"_blank\" rel=\"noreferrer noopener\">Link to article.<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Resource polymorphism has been proposed as an important phase of diversification and speciation in vertebrates. Studies of fish in young [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"template-greinar.php","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[2011],"tags":[],"class_list":["post-50441","post","type-post","status-publish","format-standard","hentry","category-greinar"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Rapid and coupled phenotypic and genetic divergence in Icelandic Arctic Charr. - Mat\u00eds<\/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:\/\/matis.is\/en\/greinar\/rapid-and-coupled-phenotypic-and-genetic-divergence-in-icelandic-arctic-charr\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Rapid and coupled phenotypic and genetic divergence in Icelandic Arctic Charr. - Mat\u00eds\" \/>\n<meta property=\"og:description\" content=\"Resource polymorphism has been proposed as an important phase of diversification and speciation in vertebrates. 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