{"id":52711,"date":"2024-05-27T15:15:23","date_gmt":"2024-05-27T15:15:23","guid":{"rendered":"https:\/\/matis.is\/?p=52711"},"modified":"2026-02-10T11:42:13","modified_gmt":"2026-02-10T11:42:13","slug":"erfdabreytileiki-laxa-i-laxa-i-adaldal","status":"publish","type":"post","link":"https:\/\/matis.is\/en\/skyrsla\/erfdabreytileiki-laxa-i-laxa-i-adaldal\/","title":{"rendered":"Genetic diversity of salmon in Lax\u00e1 in A\u00f0aldal"},"content":{"rendered":"<p>Erf\u00f0abreytileiki laxa \u00ed Lax\u00e1 \u00ed A\u00f0aldal var sko\u00f0a\u00f0ur yfir t\u00edma. Unni\u00f0 var me\u00f0 erf\u00f0as\u00fdni sem tekin voru 1980, 2004, 2022 og 2023 \u00ed Lax\u00e1. S\u00fdnin voru arfger\u00f0argreind fyrir 14 tafsra\u00f0ir fr\u00e1 SalSea arfger\u00f0arsettinu. Lj\u00f3st er a\u00f0 breytingar hafa or\u00f0i\u00f0 \u00e1 erf\u00f0asamsetningu \u00ed Lax\u00e1 \u00ed A\u00f0aldal. &nbsp;Ni\u00f0urst\u00f6\u00f0ur s\u00edna a\u00f0 me\u00f0al arfblendni hefur breyttst l\u00edtilega en arfblendni fyrir einst\u00f6k erf\u00f0aset hefur breyttst nokku\u00f0. Erf\u00f0abreytileiki m\u00e6ldur sem fj\u00f6ldi sams\u00e6ta \u00e1 erf\u00f0aseti e\u00f0a sem fj\u00f6ldi einkasams\u00e6ta \u00e1 erf\u00f0aseti hefur aukist \u00ed s\u00fdnunum fr\u00e1 2022 og 2023. Hinsvegar er lj\u00f3st a\u00f0 mat \u00e1 virkri stofnst\u00e6r\u00f0 (\u00e6xlunarstofnst\u00e6r\u00f0 \u00e1 \u00e1ri) hefur minnka\u00f0 yfir t\u00edma s\u00e9rstaklega \u00ed n\u00fdjasta s\u00fdninu fr\u00e1 2023. \u00de\u00e1 er lj\u00f3st a\u00f0 stofnger\u00f0 laxa \u00ed Lax\u00e1 hefur breyttst, \u00feannig flokkast f\u00e6rri laxar til Lax\u00e1r n\u00fa en \u00e1\u00f0ur og a\u00f0 sama skapi eru fleiri laxar greindir \u00ed \u00e1nni fr\u00e1 \u00f6\u00f0rum stofnum\/\u00e1m. Mikil r\u00e6ktun hefur \u00e1tt s\u00e9r sta\u00f0 \u00ed Lax\u00e1 s\u00ed\u00f0an 1984 hinsvegar er lj\u00f3st a\u00f0 uppruni undaneldisfisks er \u00f3\u00feekktur. V\u00edsbendingar eru um a\u00f0 r\u00e6ktun s\u00e9 a\u00f0 auka skyldleika \u00ed stofninum \u00fe\u00f3 svo a\u00f0 nokkur aukning hafi or\u00f0i\u00f0 \u00ed vei\u00f0i s\u00ed\u00f0asta \u00e1r.<br><br><strong>Genetic diversity in Atlantic salmon in river Lax\u00e1<\/strong><br><br>Genetic diversity of Atlantic salmon in river Lax\u00e1 was investigated over time. Samples were collected in the river Lax\u00e1 in 1980, 2004, 2022 and 2023. The samples were genotyped with the SalSea microsatellite marker set. Changes have occurred in genetic make up of salmon of river Lax\u00e1. Mean heterozygosity has only changed insignificantly, but larger changes are seen for individual markers. Genetic diversity as number of alleles per loci and the number of private alleles per loci have increased over time. However effective population size in year has declined especially for the sample in 2023. The stock structure in the river has also changed as fewer salmon are traced back to river Lax\u00e1 than in earlier samples. There has been a large effort in supplementing the stock from hatchery fish from the river since 1984. However, the origin of the hatchery fish is undetermined. There is observation that the supplemental program in increasing relatedness in the stock although some increase has been seen in the catch in the river for last year.<\/p>\n\n\n\n<p><em>Worked for Landsvirkjun<\/em><\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Erf\u00f0abreytileiki laxa \u00ed Lax\u00e1 \u00ed A\u00f0aldal var sko\u00f0a\u00f0ur yfir t\u00edma. Unni\u00f0 var me\u00f0 erf\u00f0as\u00fdni sem tekin voru 1980, 2004, 2022 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","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":[15],"tags":[2284,2285,2286],"class_list":["post-52711","post","type-post","status-publish","format-standard","hentry","category-skyrsla","tag-erfdabreytileiki","tag-laxa-i-adaldal","tag-virk-stofnstaerd"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Erf\u00f0abreytileiki laxa \u00ed Lax\u00e1 \u00ed A\u00f0aldal - 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\/skyrsla\/erfdabreytileiki-laxa-i-laxa-i-adaldal\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Erf\u00f0abreytileiki laxa \u00ed Lax\u00e1 \u00ed A\u00f0aldal - Mat\u00eds\" \/>\n<meta property=\"og:description\" content=\"Erf\u00f0abreytileiki laxa \u00ed Lax\u00e1 \u00ed A\u00f0aldal var sko\u00f0a\u00f0ur yfir t\u00edma. 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