{"id":6211,"date":"2026-10-19T09:48:38","date_gmt":"2026-10-19T09:48:38","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-liffraedi-gotje-katharina-gisela-von-leesen\/"},"modified":"2026-10-19T09:48:38","modified_gmt":"2026-10-19T09:48:38","slug":"doktorsvorn-i-liffraedi-gotje-katharina-gisela-von-leesen","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-liffraedi-gotje-katharina-gisela-von-leesen\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed l\u00edffr\u00e6\u00f0i &#8211; Gotje Katharina Gisela von Leesen"},"content":{"rendered":"<div class=\"field-items\">\n<div class=\"field-item even\" property=\"content:encoded\">\n<p><strong>Streymi:\u00a0 <a href=\"https:\/\/livestream.com\/hi\/doktorsvorngotjekatharinagvonleesen\">https:\/\/livestream.com\/hi\/doktorsvorngotjekatharinagvonleesen <\/a><\/strong><\/p>\n<p><strong>Doktorsefni:<\/strong>\u00a0Gotje Katharina Gisela von Leesen<\/p>\n<p><strong>Heiti ritger\u00f0ar:<\/strong> Fylgni hitastigs og b\u00fasv\u00e6\u00f0avals hj\u00e1 \u00edslenskum og nor\u00f0austur-heimskauts\u00feorski (Temperature selectivity in Icelandic and Northeast-Arctic cod)<\/p>\n<p><strong>Andm\u00e6lendur: <\/strong>Dr. Karin H\u00fcssy, rannsakandi, vi\u00f0 Danmarks Tekniske Universitet<br \/> Dr. Arild Folkvord, pr\u00f3fessor vi\u00f0 H\u00e1sk\u00f3lann \u00ed Bergen, Noregi<\/p>\n<p><strong>Lei\u00f0beinandi:<\/strong>\u00a0Dr. Steven E. Campana, pr\u00f3fessor vi\u00f0 L\u00edf- og umhverfisv\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands<\/p>\n<p><strong>Einnig \u00ed doktorsnefnd:<\/strong><strong><br \/> <\/strong>Dr. Audrey J. Geffen, pr\u00f3fessor vi\u00f0 H\u00e1sk\u00f3lann \u00ed Bergen, Noregi<br \/> Dr. Steffen Mischke, pr\u00f3fessor vi\u00f0 Jar\u00f0v\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands<br \/> Dr. Sigur\u00f0ur Sveinn Snorrason, pr\u00f3fessor vi\u00f0 L\u00edf- og umhverfisv\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands<\/p>\n<p><strong>Doktorsv\u00f6rn st\u00fdrir:<\/strong>\u00a0Dr. Arnar P\u00e1lsson, pr\u00f3fessor og varadeildarforseti L\u00edf- og umhverfisv\u00edsindadeildar H\u00e1sk\u00f3la \u00cdslands<\/p>\n<p><strong>\u00c1grip<\/strong><\/p>\n<p>H\u00e6kkandi sj\u00e1varhita er n\u00fa sp\u00e1\u00f0 um allan heim og \u00e1 nor\u00f0ursl\u00f3\u00f0um er auk \u00feess b\u00faist vi\u00f0 meiri hitasveiflum en annars sta\u00f0ar. Betri skilningur \u00e1 vi\u00f0br\u00f6g\u00f0um Atlantshafs\u00feorsks (Gadus morhua) vi\u00f0 breyttum umhverfisa\u00f0st\u00e6\u00f0um \u00e1 li\u00f0num \u00e1ratugum opnar m\u00f6guleika \u00e1 a\u00f0 sp\u00e1 fyrir um m\u00f6gulega breytta dreifingu \u00feorsksins \u00e1 t\u00edmum loftslagsbreytinga. H\u00e9r er greint fr\u00e1 ranns\u00f3knum \u00fear sem leitast var vi\u00f0 a\u00f0 sk\u00fdra hvort og hvernig \u00feorskar af \u00edslenska stofninum og nor\u00f0austur-heimskautsstofninum breg\u00f0ast vi\u00f0 breytingum \u00e1 hitastigi sj\u00e1var og stofnst\u00e6r\u00f0. L\u00ednuleg l\u00edk\u00f6n me\u00f0 bl\u00f6ndu\u00f0um \u00e1hrifa\u00fe\u00e1ttum voru notu\u00f0 til a\u00f0 greina hvort samhengi v\u00e6ri milli hundra\u00f0 \u00e1ra gagnara\u00f0a um hitastig sj\u00e1var og sveiflur \u00ed stofnst\u00e6r\u00f0 \u00feorskstofnanna annars vegar og samb\u00e6rilegra m\u00e6linga \u00e1 st\u00f6\u00f0ugum \u00eds\u00f3t\u00f3pum s\u00farefnis \u00ed \u00e1rhringjum kvarna \u00far \u00edslenska og nor\u00f0austur-heimskautsstofninum hins vegar, en vita\u00f0 er a\u00f0 nota m\u00e1 m\u00e6lingar \u00e1 \u00eds\u00f3t\u00f3pum s\u00farefnis \u00ed \u00e1rhringjum kvarna sem metil \u00e1 hitastig sem einstaklingurinn lif\u00f0i vi\u00f0 \u00feegar \u00e1rhringurinn mynda\u00f0ist. Markt\u00e6k fylgni fannst milli \u03b418O gilda \u00edslenska \u00feorsksins og sj\u00e1varhita yfir t\u00edma, sem bendir til \u00feess a\u00f0 \u00feorskurinn hafi veri\u00f0 \u00fatsettur fyrir sveiflukenndum sj\u00e1varhita s\u00ed\u00f0astli\u00f0in 100 \u00e1r en vir\u00f0ist ekki hafa h\u00f6rfa\u00f0 a\u00f0 marki fr\u00e1 h\u00e6kkandi hitastigi. Aukinn stofn\u00fe\u00e9ttleiki \u00e1 sv\u00e6\u00f0um me\u00f0 kj\u00f6rhita getur leitt til aukinnar samkeppni og minnkandi h\u00e6fni einstaklinga en sl\u00edkt getur valdi\u00f0 \u00fev\u00ed a\u00f0 sumir einstaklingar leiti \u00e1 sv\u00e6\u00f0i \u00fear sem hitastig er ekki eins hagst\u00e6tt. G\u00f6gn okkar benda til \u00feess a\u00f0 sl\u00edkt hafi \u00e1tt s\u00e9r sta\u00f0 \u00ed b\u00e1\u00f0um stofnunum en vi\u00f0br\u00f6g\u00f0in hafi samt veri\u00f0 \u00f3l\u00edk. Til frekari sta\u00f0festingar \u00e1 notagildi kvarna til a\u00f0 s\u00fdna hitastig sj\u00e1var \u00e1 mismunandi stigum l\u00edfsferils voru \u00eds\u00f3t\u00f3par s\u00farefnis m\u00e6ldir \u00ed kv\u00f6rnum \u00feorska sem \u00e1 voru fest gagnas\u00f6fnunarmerki (DST-tag) sem m\u00e6la hitastig og d\u00fdpi. \u00cd \u00feessu tilfelli voru \u00eds\u00f3t\u00f3par \u00ed vaxtarhringjum kvarna m\u00e6ldir me\u00f0 meiri upplausn \u00ed n\u00e1kv\u00e6mum massalitr\u00f3fsgreini (SIMS) og sta\u00f0fest a\u00f0 \u00feessar a\u00f0fer\u00f0ir eru vel til \u00feess fallnar a\u00f0 meta hitastig sj\u00e1var sem fiskar hafa dvali\u00f0 \u00ed aftur \u00ed t\u00edmann, \u00fe\u00f3 svo a\u00f0 h\u00e1markshiti s\u00e9 gjarnan ofmetinn. Ranns\u00f3knirnar s\u00fdna hvernig nota m\u00e1 m\u00e6lingar \u00e1 \u00eds\u00f3t\u00f3pum s\u00farefnis \u00ed \u00e1rhringjum kvarna \u00e1samt samb\u00e6rilegum langt\u00edmag\u00f6gnum um hitastig sj\u00e1var og stofnsveiflur til \u00feess a\u00f0 greina hvernig \u00feessir \u00fe\u00e6ttir hafa \u00e1hrif \u00e1 hitastigsval \u00feorsks. Sl\u00edkar uppl\u00fdsingar geta reynst hj\u00e1lplegar vi\u00f0 a\u00f0 sp\u00e1 fyrir um hvernig \u00feorskstofnar breg\u00f0ast vi\u00f0 hnattr\u00e6nni hl\u00fdnun og stofnsveiflum.<\/p>\n<p><strong>Um doktorsefni\u00f0<\/strong><\/p>\n<p>Gotje von Leesen er f\u00e6dd og uppalin \u00ed \u00de\u00fdskalandi. H\u00fan \u00fatskrifa\u00f0ist me\u00f0 BSc-gr\u00e1\u00f0u \u00ed l\u00edffr\u00e6\u00f0i \u00ed Bremen \u00e1ri\u00f0 2014 og tveimur \u00e1rum seinna me\u00f0 al\u00fej\u00f3\u00f0lega MSc-gr\u00e1\u00f0u \u00ed l\u00edffr\u00e6\u00f0ilegum fj\u00f6lbreytileika sj\u00e1var og verndun hans (EMBC). Um nokkurt skei\u00f0, \u00e1\u00f0ur en h\u00fan h\u00f3f doktorsferil sinni vi\u00f0 H\u00e1sk\u00f3la \u00cdslands \u00ed \u00e1g\u00fast 2017, starfa\u00f0i h\u00fan sem ranns\u00f3knara\u00f0sto\u00f0arma\u00f0ur vi\u00f0 Alfred-Wegener-Institute \u00ed Bremerhaven \u00ed \u00de\u00fdskalandi. H\u00fan er n\u00fana starfandi sem n\u00fddoktor vi\u00f0 H\u00e1sk\u00f3lann \u00ed \u00c1r\u00f3sum \u00fear sem h\u00fan hyggst halda ranns\u00f3knum s\u00ednum \u00e1 st\u00f6\u00f0ugum s\u00farefnis- og kolefnis\u00eds\u00f3t\u00f3pum \u00far kv\u00f6rnum \u00feorska \u00e1fram.<\/p>\n<p><strong><br \/> <\/strong><\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<\/div><\/div>","protected":false},"featured_media":4975,"template":"","meta":{"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":"","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-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":"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":""},"mobile":{"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":""}},"_phd_date_start":"2021-06-25T14:00:00+00:00","_phd_date_end":"2021-06-25T16:00:00+00:00","_phd_location":"Askja Stofa 132","_phd_admission":"A\u00f0gangur \u00f3keypis","_phd_thesis_title":"Fylgni hitastigs og b\u00fasv\u00e6\u00f0avals hj\u00e1 \u00edslenskum og nor\u00f0austur-heimskauts\u00feorski (Temperature selectivity in Icelandic and Northeast-Arctic cod)","_phd_source_url":"https:\/\/gamli.hi.is\/vidburdir\/doktorsvorn_i_liffraedi_gotje_katharina_gisela_von_leesen","_phd_source_node_id":"375701","_phd_source_type":"vidburdir","_phd_member_id":734,"footnotes":""},"phd_school":[96,93],"phd_discipline":[97],"class_list":["post-6211","phd_defence","type-phd_defence","status-publish","has-post-thumbnail","hentry","phd_school-lif-og-umhverfisvisindadeild","phd_school-verkfraedi-og-natturuvisindasvid","phd_discipline-phd-i-liffraedi"],"_links":{"self":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence\/6211","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence"}],"about":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/types\/phd_defence"}],"version-history":[{"count":0,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence\/6211\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media\/4975"}],"wp:attachment":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media?parent=6211"}],"wp:term":[{"taxonomy":"phd_school","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_school?post=6211"},{"taxonomy":"phd_discipline","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_discipline?post=6211"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}