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Frá árinu 1970 hefur Hafrannsóknastofnun farið í umfangsmikla leiðangra austur fyrir Ísland að vori og safnað gögnum um frumframleiðni, dýrasvif og síld og mælt umhverfisbreytur, þ.á.m. seltu, hita og næringarefni. Í þessari rannsókn munum við einblína á tvö ólík svæði, kalda sjóinn austur og norðaustur af Íslandi (66-67.5°N, 9-12°W) og hlýja sjóinn í suðaustri (63.5-65°N, 9-12°W) og leitast við að svara eftirfarandi spurningum:

Hefur tegundasamsetning, þroski og magn dýrasvifs breyst undanfarin 22 ár (1995-2017)?
Er samband á milli umhverfisbreyta, þroska og magns dýrasvifs og magns og göngumynsturs síldar? 
Endurspeglar hlutfall og magn dýrasvifs í sjónum fæðu síldarinnar, þ.e. er síldin að velja sér fæðu?
Markmið verkefnisins er að fá heildrænan skilning á samspili umhverfisþátta, dýrasvifs og síldar í uppsjávarvistkerfinu austan við Ísland. Niðurstöður rannsóknarinnar verða nýttar til þess að skilja betur göngumynstur og fæðuvistfræði síldarinnar og til að kortleggja samfélagsgerð dýrasvifsins. Aukinn skilningur á dýrasvifinu, sem er einn mikilvægasti fæðuhlekkur hafsins, og samspili þess við fiskistofna sem lifa í uppsjónum, er nauðsynlegur til þess að hægt sé að spá fyrir um breytingar á komandi árum.</gco:CharacterString>
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