{"id":6136,"date":"2026-10-19T09:48:33","date_gmt":"2026-10-19T09:48:33","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-i-liffraedi-jed-macdonald\/"},"modified":"2026-10-19T09:48:33","modified_gmt":"2026-10-19T09:48:33","slug":"doktorsvorn-i-i-liffraedi-jed-macdonald","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-i-liffraedi-jed-macdonald\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed \u00ed l\u00edffr\u00e6\u00f0i – Jed Macdonald"},"content":{"rendered":"
\n
\n

Doktorsefni:<\/strong>\u00a0Jed Macdonald<\/p>\n

Heiti ritger\u00f0ar:<\/strong>\u00a0Notkun l\u00edkana og kvarna til a\u00f0 l\u00fdsa \u00fatbrei\u00f0slu og fer\u00f0um fiska \u00ed sj\u00f3<\/p>\n

Andm\u00e6lendur:\u00a0
<\/strong>Dr. Audrey Geffen, pr\u00f3fessor vi\u00f0 H\u00e1sk\u00f3lann \u00ed Bergen \u00ed Noregi\u00a0
Dr. Pierre Petitgas, IFREMER, Nantes \u00ed Frakklandi.<\/p>\n

Lei\u00f0beinandi:<\/strong>\u00a0Dr. Gu\u00f0r\u00fan Marteinsd\u00f3ttir, pr\u00f3fessor vi\u00f0 L\u00edf- og umhverfisv\u00edsindadeild.<\/p>\n

Einnig \u00ed doktorsnefnd:<\/strong>\u00a0<\/p>\n

\u00deorsteinn Sigur\u00f0sson, svi\u00f0sstj\u00f3ri hj\u00e1 Hafranns\u00f3knarstofnun
Dr. Geir Huse, fr\u00e1 Marine Research Institute, Bergen \u00ed Noregi.<\/p>\n

Doktorsv\u00f6rn st\u00fdrir:<\/strong>\u00a0Dr. Sn\u00e6bj\u00f6rn P\u00e1lsson, pr\u00f3fessor vi\u00f0 L\u00edf- og umhverfisv\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands<\/p>\n

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

Hreyfingar og hjar\u00f0heg\u00f0un d\u00fdra er heillandi og \u00e1hrifamiki\u00f0 sj\u00f3narspil sem hefur veri\u00f0 uppspretta \u00fdmissa ranns\u00f3kna. Fiskar eru me\u00f0al \u00feeirra d\u00fdra sem s\u00fdna hva\u00f0 mest sl\u00e1andi d\u00e6mi um hjar\u00f0heg\u00f0un og margar heimildir eru til um sl\u00edkt atferli hj\u00e1 nytjastofnum sem og \u00f6\u00f0rum l\u00edfverum sj\u00e1var.<\/p>\n

Eftir \u00fev\u00ed sem meiri vitneskja safnast um vitsmunalega getu fiska, sem og um breytileika \u00e1 me\u00f0al einstaklinga innan s\u00f6mu tegundar, vakna spurningar um hva\u00f0a \u00fe\u00e6ttir hafa mest \u00e1hrif \u00e1 heg\u00f0un \u00feeirra.<\/p>\n

\u00deessi ritger\u00f0 samanstendur af fimm v\u00edsindagreinum \u00fear sem notu\u00f0 eru l\u00edk\u00f6n til a\u00f0 l\u00fdsa \u00fatbrei\u00f0slu fiska \u00ed sj\u00f3 me\u00f0 s\u00e9rstakri \u00e1herslu \u00e1 a\u00f0 sk\u00fdra \u00fe\u00e6tti sem hafa \u00e1hrif \u00e1 \u00fabrei\u00f0slu \u00edslenskrar sumargotss\u00edldar (Clupea harengus L.) vi\u00f0 \u00cdsland og rau\u00f0r\u00f6ndungs (Mullus surmuletus L.) \u00ed Nor\u00f0ursj\u00f3 og Ermasundi.<\/p>\n

Nota\u00f0ar eru n\u00fdjar Bayesian a\u00f0fer\u00f0ir \u00ed l\u00edkanager\u00f0 sem eru samtvinna\u00f0ar vi\u00f0 greiningar \u00e1 efnainnihaldi kvarna til a\u00f0 sko\u00f0a innri \u00fe\u00e6tti (s.s. samh\u00e6ft atferli, l\u00fd\u00f0fr\u00e6\u00f0ilega eiginleika, einstaklings\u00feroska) og ytri \u00fe\u00e6tti (s.s. umhverfis\u00fe\u00e6tti, vei\u00f0i\u00e1lag, f\u00e6\u00f0uframbo\u00f0) sem \u00e1hrif hafa \u00e1 dreifingu \u00feessarra mikilv\u00e6gu nytjastofna.<\/p>\n

Ni\u00f0urst\u00f6\u00f0urnar s\u00fdna a\u00f0 me\u00f0 \u00fev\u00ed a\u00f0 tengja saman innri og ytri \u00fe\u00e6tti \u00fe\u00e1 m\u00e1 betur l\u00fdsa g\u00f6ngum torfufiska. \u00de\u00e1 er einnig s\u00fdnt fram \u00e1 hvernig n\u00fdta m\u00e1 ni\u00f0urst\u00f6\u00f0urnar vi\u00f0 fiskvei\u00f0istj\u00f3rnun, b\u00e6\u00f0i vi\u00f0 n\u00faverandi umhverfisa\u00f0st\u00e6\u00f0ur og einnig ef umhverfisa\u00f0st\u00e6\u00f0ur breytast.<\/p>\n

Um doktorsefni\u00f0:\u00a0<\/strong><\/p>\n

Jed f\u00e6ddist \u00ed Melbourne \u00ed \u00c1stral\u00edu \u00e1ri\u00f0 1979. Hann lauk BS pr\u00f3fi \u00ed vistfr\u00e6\u00f0i vi\u00f0 H\u00e1sk\u00f3lann \u00ed Tasman\u00edu og meistarapr\u00f3fi \u00ed fiskfr\u00e6\u00f0i fr\u00e1 sama sk\u00f3la.
Eftir nokkurra \u00e1ra starf vi\u00f0 ranns\u00f3knir \u00e1 ferskvatnsfiski \u00ed \u00c1stral\u00edu, Bretlandi og Su\u00f0ur Amer\u00edku, h\u00f3f hann doktorsn\u00e1m vi\u00f0 H\u00e1sk\u00f3la \u00cdslands \u00e1ri\u00f0 2013.\u00a0<\/p>\n<\/div><\/div>","protected":false},"featured_media":2013,"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":"2019-10-03T13:00:00+00:00","_phd_date_end":"2019-10-03T14:30:00+00:00","_phd_location":"A\u00f0albygging H\u00e1t\u00ed\u00f0arsalur","_phd_admission":"A\u00f0gangur \u00f3keypis","_phd_thesis_title":"Notkun l\u00edkana og kvarna til a\u00f0 l\u00fdsa \u00fatbrei\u00f0slu og fer\u00f0um fiska \u00ed sj\u00f3","_phd_source_url":"https:\/\/gamli.hi.is\/vidburdir\/doktorsvorn_i_i_liffraedi_jed_macdonald","_phd_source_node_id":"323405","_phd_source_type":"vidburdir","_phd_member_id":600,"footnotes":""},"phd_school":[96,93],"phd_discipline":[97],"class_list":["post-6136","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\/6136","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\/6136\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media\/2013"}],"wp:attachment":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media?parent=6136"}],"wp:term":[{"taxonomy":"phd_school","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_school?post=6136"},{"taxonomy":"phd_discipline","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_discipline?post=6136"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}