{"id":6263,"date":"2026-10-19T09:48:42","date_gmt":"2026-10-19T09:48:42","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-matvaelafraedi-gudrun-svana-hilmarsdottir\/"},"modified":"2026-10-19T09:48:42","modified_gmt":"2026-10-19T09:48:42","slug":"doktorsvorn-i-matvaelafraedi-gudrun-svana-hilmarsdottir","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-matvaelafraedi-gudrun-svana-hilmarsdottir\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed matv\u00e6lafr\u00e6\u00f0i – Gu\u00f0r\u00fan Svana Hilmarsd\u00f3ttir"},"content":{"rendered":"
\n
\n

\u00deri\u00f0judaginn 31. ma\u00ed ver Gu\u00f0r\u00fan Svana Hilmarsd\u00f3ttir doktorsritger\u00f0 s\u00edna \u00ed matv\u00e6lafr\u00e6\u00f0i vi\u00f0 Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideild H\u00e1sk\u00f3la \u00cdslands. Ritger\u00f0in ber heiti\u00f0: Megin\u00e1hrifa\u00fe\u00e6ttir g\u00e6\u00f0a og umhverfis\u00e1hrifa vi\u00f0 framlei\u00f0slu fiskmj\u00f6ls og l\u00fdsis \u00far uppsj\u00e1varfiski. Identification of quality and environmental hotspots during pelagic fishmeal and fish oil production.<\/strong><\/p>\n

Andm\u00e6lendur eru Dr. \u00c5ge Oterhals, pr\u00f3fessor vi\u00f0 Nofima h\u00e1sk\u00f3lann \u00ed Noregi, og dr. Massimo Pizzol, pr\u00f3fessor vi\u00f0 \u00c1laborgarh\u00e1sk\u00f3la, \u00ed Danm\u00f6rku.<\/p>\n

Umsj\u00f3narkennari og lei\u00f0beinandi var dr. Mar\u00eda Gu\u00f0j\u00f3nsd\u00f3ttir, pr\u00f3fessor vi\u00f0 Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideild. Auk hennar s\u00e1tu \u00ed doktorsnefnd \u00d3lafur \u00d6gmundarson lektor og Sigurj\u00f3n Arason, pr\u00f3fessor emeritus.<\/p>\n

\u00d3l\u00f6f Gu\u00f0n\u00fd Geirsd\u00f3ttir, d\u00f3sent og varadeildarforseti Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideildar, stj\u00f3rnar ath\u00f6fninni sem fer fram \u00ed H\u00e1t\u00ed\u00f0asal H\u00e1sk\u00f3la \u00cdslands og hefst kl. 13.00.<\/p>\n

V\u00f6rninni ver\u00f0ur streymt:\u00a0https:\/\/livestream.com\/hi\/doktorsvorngudrunsvanahilmarsdottir<\/a><\/p>\n

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

\u00cd dag eru uppsj\u00e1vartegundir, hli\u00f0arstraumar fr\u00e1 vinnslust\u00e6rri fisktegundum og annar me\u00f0afli uppista\u00f0an \u00ed \u00fev\u00ed hr\u00e1efni sem unni\u00f0 er \u00ed fiskmj\u00f6l og l\u00fdsi. Fiskmj\u00f6l og l\u00fdsi eru helst notu\u00f0 sem f\u00f3\u00f0ur \u00ed fiskeldi, en \u00fear sem ver\u00f0 \u00e1 fiskmj\u00f6li hefur l\u00e6kka\u00f0 s\u00ed\u00f0asta \u00e1ratuginn og hlutur \u00feess hefur minnka\u00f0 \u00ed fiskeldisf\u00f3\u00f0ri \u00fearf a\u00f0 finna n\u00fdjar lei\u00f0ir til a\u00f0 n\u00fdta hr\u00e1efni\u00f0 \u00e1 hagkv\u00e6man h\u00e1tt. \u00deessi ranns\u00f3kn varpar lj\u00f3si \u00e1 n\u00faverandi \u00e1stand hr\u00e1efnisins og \u00feeirra g\u00e6\u00f0abreytinga sem eiga s\u00e9r sta\u00f0 \u00ed hverju vinnslu\u00ferepi \u00ed fiskmj\u00f6ls- og l\u00fdsisframlei\u00f0slunni (Grein I-II), \u00e1samt \u00fev\u00ed a\u00f0 meta \u00e1hrif breytilegs hitastigs \u00ed sj\u00f3\u00f0ara \u00e1 g\u00e6\u00f0i (Grein I), kanna\u00f0 er hvernig framlei\u00f0sluferli\u00f0 h\u00f6ndlar mismunandi hr\u00e1efni (Grein II), rannsaka\u00f0ir eru eiginleikar hli\u00f0arstrauma m.t.t. pr\u00f3teing\u00e6\u00f0a (Grein III), k\u00f6nnu\u00f0 umhverfis\u00e1hrif \u00e1 framlei\u00f0slu fiskmj\u00f6ls og l\u00fdsis \u00far lo\u00f0nu me\u00f0 mismunandi orkugj\u00f6fum (Grein IV) og kanna\u00f0 hvort h\u00e6gt s\u00e9 a\u00f0 nota n\u00e6rinnrau\u00f0a litr\u00f3fsgreiningu (NIR) til g\u00e6\u00f0am\u00e6linga og ferlast\u00fdringar \u00ed fiskmj\u00f6ls- og l\u00fdsisframlei\u00f0slunni (Grein V). Greinarnar leggja grunninn a\u00f0 b\u00e6ttum fiskmj\u00f6ls- og l\u00fdsisferlum og auka \u00feekkingu \u00e1 vinnsluferlunum sem mun n\u00fdtast vi\u00f0 \u00fer\u00f3un \u00feeirra n\u00e6stu \u00e1rin.<\/p>\n

English abstract<\/strong><\/p>\n

Today, small pelagic species, side-streams from the production of larger fishes intended for human consumption, and other by-catch are currently processed into fishmeal and fish oil. Fishmeal and fish oil are presently mainly used as feed, primarily for aquaculture, but fishmeal prices have declined over the last decade. Great effort towards improving handling on board the fishing vessels has resulted in higher quality of the catch reaching the harbor. Meanwhile, the fishmeal and fish oil production processes have remained similar since the 1960s. Hence, this thesis aims to shed light on the current state of the raw material and the quality changes occurring during each operational step of the production (Paper I-II), to assess the effect of cooking temperature on the fishmeal quality (Paper I), investigates how the production process handles different raw materials (Paper II), investigates promising protein rich side-streams for the production of higher value products (Paper III), investigates the environmental impacts of producing 1 tonne of fishmeal and fish oil (Paper IV), and investigates if Near infrared spectroscopy (NIR) can be used as a monitoring tool during the fishmeal and fish oil production. The papers, I-V, also lay a foundation for redesigning purposes of the currently operated fishmeal and fish oil factories.<\/p>\n

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

Gu\u00f0r\u00fan Svana Hilmarsd\u00f3ttir er f\u00e6dd \u00e1ri\u00f0 1990 \u00e1 Akureyri. H\u00fan lauk st\u00fadentspr\u00f3fi af n\u00e1tt\u00farufr\u00e6\u00f0ibraut Menntask\u00f3lans \u00e1 Akureyri, auk burtfararpr\u00f3fs \u00e1 sell\u00f3 fr\u00e1 T\u00f3nlistarsk\u00f3la Akureyrar \u00e1ri\u00f0 2010, og er \u00feekkt fyrir a\u00f0 sl\u00e1 \u00e1 l\u00e9tta strengi enn \u00ed dag. \u00c1ri\u00f0 2013 lauk Gu\u00f0r\u00fan B.Sc. pr\u00f3fi \u00ed l\u00edfefnafr\u00e6\u00f0i vi\u00f0 H\u00e1sk\u00f3la \u00cdslands og f\u00f3r \u00ed kj\u00f6lfari\u00f0 utan. \u00c1ri\u00f0 2016 kl\u00e1ra\u00f0i h\u00fan al\u00fej\u00f3\u00f0legt M.Sc. n\u00e1m \u00ed framlei\u00f0slu sj\u00e1varafur\u00f0a, me\u00f0 \u00e1herslu \u00e1 g\u00e6\u00f0i og \u00f6ryggi, fr\u00e1 T\u00e6knih\u00e1sk\u00f3lunum \u00ed Noregi og Danm\u00f6rku (NTNU og DTU). Gu\u00f0r\u00fan hefur me\u00f0fram doktorsn\u00e1minu sinnt b\u00e6\u00f0i lei\u00f0beiningu M.Sc. nemenda, sem og stundakennslu vi\u00f0 Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideild H\u00e1sk\u00f3la \u00cdslands. Foreldrar Gu\u00f0r\u00fanar eru Krist\u00edn P\u00e9tursd\u00f3ttir og Hilmar Karlsson, maki hennar er Hjalti Hannesson og d\u00f3ttir \u00feeirra er Emma Krist\u00edn Hjaltad\u00f3ttir.<\/p>\n<\/div><\/div>","protected":false},"featured_media":5147,"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":"2022-05-31T13:00:00+00:00","_phd_date_end":"2022-05-31T16:00:00+00:00","_phd_location":"A\u00f0albygging H\u00e1t\u00ed\u00f0asalur","_phd_admission":"A\u00f0gangur \u00f3keypis","_phd_thesis_title":"Megin\u00e1hrifa\u00fe\u00e6ttir g\u00e6\u00f0a og umhverfis\u00e1hrifa vi\u00f0 framlei\u00f0slu fiskmj\u00f6ls og l\u00fdsis \u00far uppsj\u00e1varfiski. Identification of quality and environmental hotspots during pelagic fishmeal and fish oil production","_phd_source_url":"https:\/\/gamli.hi.is\/vidburdir\/doktorsvorn_i_matvaelafraedi_gudrun_svana_hilmarsdottir","_phd_source_node_id":"383783","_phd_source_type":"vidburdir","_phd_member_id":791,"footnotes":""},"phd_school":[60,72],"phd_discipline":[74],"class_list":["post-6263","phd_defence","type-phd_defence","status-publish","has-post-thumbnail","hentry","phd_school-heilbrigdisvisindasvid","phd_school-matvaela-og-naeringafraedideild","phd_discipline-phd-i-matvaelafraedi"],"_links":{"self":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence\/6263","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\/6263\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media\/5147"}],"wp:attachment":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media?parent=6263"}],"wp:term":[{"taxonomy":"phd_school","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_school?post=6263"},{"taxonomy":"phd_discipline","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_discipline?post=6263"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}