{"id":6141,"date":"2026-10-19T09:48:33","date_gmt":"2026-10-19T09:48:33","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-liffraedi-samantha-victoria-beck\/"},"modified":"2026-10-19T09:48:33","modified_gmt":"2026-10-19T09:48:33","slug":"doktorsvorn-i-liffraedi-samantha-victoria-beck","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-liffraedi-samantha-victoria-beck\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed l\u00edffr\u00e6\u00f0i – Samantha Victoria Beck"},"content":{"rendered":"
\n
\n

Doktorsefni:<\/strong>\u00a0Samantha Victoria Beck<\/p>\n

Heiti ritger\u00f0ar:<\/strong>\u00a0Mikilv\u00e6gi Hrognast\u00e6r\u00f0ar fyrir \u00fer\u00f3un fj\u00f6lbreytileika hj\u00e1 afbrig\u00f0um bleikju (Salvelinus Alpinus)<\/p>\n

Andm\u00e6lendur:<\/strong>
<\/strong>Dr. Benedikt Hallgr\u00edmsson, pr\u00f3fessor vi\u00f0 Calgaryh\u00e1sk\u00f3la, Kanada
Dr.Kimmo K. Kahilainen, pr\u00f3fessor vi\u00f0 INN H\u00f8gskolen i Innlandet, Noregi<\/p>\n

Lei\u00f0beinandi:<\/strong>\u00a0Dr. Camille A. Leblanc, d\u00f3sent vi\u00f0 H\u00e1sk\u00f3lann \u00e1 H\u00f3lum<\/p>\n

Umsj\u00f3narkennari:\u00a0<\/strong>Dr. Zophon\u00edas O. J\u00f3nsson, pr\u00f3fessor vi\u00f0 L\u00edf- og umhverfisv\u00edsindadeild \u00a0H\u00e1sk\u00f3la \u00cdslands<\/p>\n

Einnig \u00ed doktorsnefnd:<\/strong>
<\/strong>
Dr. Katja R\u00e4s\u00e4nen, lektor vi\u00f0 EAWAG \u00ed Sviss
Dr. Bjarni K. Kristj\u00e1nsson, pr\u00f3fessor vi\u00f0 H\u00e1sk\u00f3lann \u00e1 H\u00f3lum
Dr. Sk\u00fali Sk\u00falason, pr\u00f3fessor vi\u00f0 H\u00e1sk\u00f3lann \u00e1 H\u00f3lum
Dr. John Postlethwait, pr\u00f3fessor emeritus vi\u00f0 h\u00e1sk\u00f3lann \u00ed Oregon, Bandar\u00edkjunum<\/p>\n

Doktorsv\u00f6rn st\u00fdrir:<\/strong>\u00a0Dr. Anna D\u00f3ra S\u00e6\u00fe\u00f3rsd\u00f3ttir, deildarforseti L\u00edf- og umhverfisv\u00edsindadeildar H\u00e1sk\u00f3la \u00cdslands.<\/p>\n

\u00c1grip<\/strong><\/p>\n

Breytileiki \u00e1 hrognast\u00e6r\u00f0 innan og milli tegunda fiska er umtalsver\u00f0ur og hrognast\u00e6r\u00f0 hefur \u00e1hrif \u00e1 afkomu og h\u00e6fni afkv\u00e6ma. Skilningur okkar \u00e1 \u00fev\u00ed hva\u00f0a \u00e1hrif eggjast\u00e6r\u00f0 getur haft \u00e1 \u00feroskunarferla afkv\u00e6ma er aftur \u00e1 m\u00f3ti takmarka\u00f0ur. Bleikja (Salvelinus alpinus) er \u00feekkt fyrir \u00f3venjumikinn svipger\u00f0arbreytileika og mismunandi afbrig\u00f0i sem n\u00fdta \u00f3l\u00edk b\u00fasv\u00e6\u00f0i og f\u00e6\u00f0u innan sama st\u00f6\u00f0uvatnsins eru algeng. Samantha athuga\u00f0i hvort breytileiki \u00ed st\u00e6r\u00f0 hrogna og afkv\u00e6ma hefur \u00e1hrif \u00e1 \u00feroskunarhra\u00f0a og tj\u00e1ningu gena tengdum vexti, bein\u00feroskun og l\u00f6gun \u00feess hluta h\u00f6fu\u00f0k\u00fapunnar sem tengjast f\u00e6\u00f0un\u00e1mi. \u00deetta var meti\u00f0 \u00ed afkv\u00e6mum vi\u00f0 klak og \u00feegar a \u00feau byrju\u00f0u a\u00f0 \u00e9ta. Sl\u00edk tengsl hrognast\u00e6r\u00f0ar og f\u00f3stur\u00feroska voru ranns\u00f6ku\u00f0 hj\u00e1 misa\u00f0greindum afbrig\u00f0um \u00ed tveim st\u00f6\u00f0uv\u00f6tnum (\u00deingvallavatni og Vatnshl\u00ed\u00f0arvatni), sem og hj\u00e1 sj\u00f3bleikjustofni (Flj\u00f3ta\u00e1). Genatj\u00e1ning og \u00feroskunarhra\u00f0i voru \u00f3l\u00edk milli afbrig\u00f0a, en hrognast\u00e6r\u00f0 haf\u00f0i einungis \u00e1hrif \u00ed einu afbrig\u00f0i. \u00deannig var tj\u00e1ning gena sem hafa \u00e1hrif h\u00f6fu\u00f0bein\u00feroskun hlutfallslega h\u00e1 snemma \u00e1 \u00feroskaferlinu (augnstig) og jafnframt tengd hrognast\u00e6r\u00f0 hj\u00e1 afkv\u00e6mum silfra\u00f0a-afbrig\u00f0isins \u00ed Vatnshl\u00ed\u00f0arvatni; en afbrig\u00f0in \u00ed vatninu eru minna a\u00f0skilin er afbrig\u00f0in \u00ed \u00deingvallavatni. Samanteki\u00f0 sty\u00f0ja ni\u00f0urst\u00f6\u00f0ur \u00fe\u00e1 tilg\u00e1tu a\u00f0 sveigjanleiki \u00ed \u00feroska svipger\u00f0a, m.a. vegna \u00e1hrifa hrognast\u00e6r\u00f0ar, minnki eftir \u00fev\u00ed sem samsv\u00e6\u00f0a bleikjuafbrig\u00f0 eru a\u00f0greindari. Helsta n\u00fdn\u00e6mi ritger\u00f0arinnar felst \u00ed \u00fev\u00ed a\u00f0 s\u00fdna hvernig breytileiki \u00ed genatj\u00e1ningu og snemm\u00feroska svipger\u00f0a geti sk\u00fdrt tilur\u00f0 \u00f3l\u00edkra afbrig\u00f0a innan tegunda og a\u00f0 \u00e1 fyrstu stigum sl\u00edkrar \u00fer\u00f3unar geti hrognast\u00e6r\u00f0 haft \u00e1hrif \u00e1 sveigjanleika \u00feessara \u00fe\u00e1tta.<\/p>\n

Um doktorsefni\u00f0<\/strong><\/p>\n

Samantha h\u00f3f n\u00e1m \u00ed hestafr\u00e6\u00f0um vi\u00f0 Oatridge College \u00ed Skotlandi en flutti svo til Nor\u00f0ur Wales \u00fear sem h\u00fan lauk fyrstu h\u00e1sk\u00f3lagr\u00e1\u00f0u \u00ed d\u00fdra- og n\u00e1tt\u00faruverndarfr\u00e6\u00f0i vi\u00f0 H\u00e1sk\u00f3lann \u00ed Bangor. Lokaverkefni hennar var unni\u00f0 \u00e1 ranns\u00f3knastofu \u00ed sameindavistfr\u00e6\u00f0i og fiskaerf\u00f0afr\u00e6\u00f0i og fjalla\u00f0i um l\u00edflandafr\u00e6\u00f0i „Su\u00f0ur As\u00edskra killifiska“ (South Asian Killifish). \u00dear kvikna\u00f0i \u00e1hugi hennar \u00e1 a\u00f0 nota sameindal\u00edffr\u00e6\u00f0ilegar a\u00f0fer\u00f0ir til a\u00f0 \u00fatsk\u00fdra stofnger\u00f0 fiska, sem leiddi til \u00feess a\u00f0 h\u00fan h\u00f3f meistaran\u00e1m vi\u00f0 ranns\u00f3knir \u00e1 stofnerf\u00f0afr\u00e6\u00f0i Bleikju \u00ed Nor\u00f0ur Wales og lauk me\u00f0 \u00fev\u00ed a\u00f0 h\u00fan hlaut ver\u00f0laun fyrir bestu meistararitger\u00f0 vi\u00f0 h\u00e1sk\u00f3lann \u00ed Nor\u00f0ur Wales \u00e1ri\u00f0 2014. Samantha vildi halda \u00e1fram \u00ed bleikjuranns\u00f3knum og flutti til \u00cdslands \u00e1ri\u00f0 2014 \u00fear sem h\u00fan h\u00f3f doktorsn\u00e1m sitt vi\u00f0 ranns\u00f3knir \u00e1 mikilv\u00e6gi hrognast\u00e6r\u00f0ar fyrir \u00fer\u00f3un fj\u00f6lbreytileika hj\u00e1 afbrig\u00f0um \u00edslenskrar bleikju.<\/p>\n

Vi\u00f0bur\u00f0ur \u00e1 facebook<\/a><\/p>\n


<\/strong><\/p>\n

\u00a0<\/strong><\/p>\n<\/div><\/div>","protected":false},"featured_media":5269,"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":"2019-01-30T13:00:00+00:00","_phd_date_end":"2019-01-30T15:00:00+00:00","_phd_location":"Askja Stofa 132","_phd_admission":"Allir velkomnir","_phd_thesis_title":"Mikilv\u00e6gi Hrognast\u00e6r\u00f0ar fyrir \u00fer\u00f3un fj\u00f6lbreytileika hj\u00e1 afbrig\u00f0um bleikju (Salvelinus Alpinus)","_phd_source_url":"https:\/\/gamli.hi.is\/vidburdir\/doktorsvorn_i_liffraedi_samantha_victoria_beck","_phd_source_node_id":"314413","_phd_source_type":"vidburdir","_phd_member_id":624,"footnotes":""},"phd_school":[96,93],"phd_discipline":[97],"class_list":["post-6141","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\/6141","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\/6141\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media\/5269"}],"wp:attachment":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media?parent=6141"}],"wp:term":[{"taxonomy":"phd_school","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_school?post=6141"},{"taxonomy":"phd_discipline","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_discipline?post=6141"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}