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The System for Assessment of Ecological Condition, coordinated by the Norwegian Environment Agency, is intended to form the foundation for evidence-based assessments of the ecological condition of Norwegian terrestrial and marine ecosystems not covered by the EU Water Framework Directive. The reference condition is defined as “intact ecosystems”, i.e., a condition that is largely unimpacted by modern industrial anthropogenic activities. An ecosystem in good ecological condition does not deviate substantially from this reference condition in structure, functions or productivity. This report describes the first operational assessment of the ecological condition of the marine shelf ecosystem in the Norwegian sector of the North Sea and Skagerrak. The assessment method employed is the Panel-based Assessment of Ecosystem Condition (PAEC1) and the current assessment has considered to what extent the North Sea and Skagerrak shelf ecosystem deviates from the reference condition2 by evaluating change trajectories. Panel-based Assessment of Ecosystem Condition of the North Sea Shelf Ecosystem

Etter at vi startet opp med fangstprøvelotteriet i 2018 har vi sett en gradvis og betydelig forbedring i prøvetakingen fra de kommersielle pelagiske fiskeriene. Vi ser likevel et stort forbedringspotensial framover siden det per i dag kun er ca. 60% av de bestilte prøvene som faktisk kommer frem til HI og dermed kan inngå i bestandsvurderingene. Dette skyldes blant annet at ikke alle fiskerne som mottar prøvebestilling gjennomfører prøvetakingen. I tillegg tror vi at noen prøver blir glemt igjen både om bord og på mottaksanleggene som skal sende prøvene videre til HI. Det er derfor viktig å fortsette arbeidet med å informere næringsaktørene om fangstprøvelotteriet og forbedre systemet for tilbakemelding om resultatene fra prøvene. Fangstprøvelotteriet gir de viktigste grunnlagsdataene for kvoteanbefalingene for pelagisk fisk, og en forbedring av prøvetakingen vil derfor først og fremst komme fiskerinæringen til gode. Fangstprøvelotteriet 2020 – erfaringer og resultat

Sprat is a key species in several Norwegian fjords, as an important prey for fish, sea mammals and sea birds. The sprat populations are monitored with routine acoustic-trawl surveys using a large research vessel, which provide the main scientific basis for sprat quota advices. Previous survey observations indicate that a significant fraction of the sprat population can be found close to the sea surface and thereby in the acoustic blind zone of the echosounder mounted below the vessel. In addition, fish may avoid the approaching vessel, and thereby measure less acoustic density. Furthermore, a large research vessel cannot operate in shallow waters and is difficult to maneuver close to the shore. In an experiment carried out in Årdalsfjorden in the evening 15 August and during daytime 16 August, the distribution of sprat was measured with a kayak drone installed with a 200 kHz echosounder. The geographical distribution and the mean acoustic density were similar between the two coverages. The experiment showed that 63% of the fish density was observed closer to the surface than 8 meters, which is the acoustic blind zone of research vessel. At daytime, the fish was distributed deeper, but 24% of the fish was still distributed closer to the surface than 8 m. This experiment show that future sprat surveys should be carried with silent vehicles where the echo sounders are mounted near the surface. A larger vessel is though also needed for trawling for biological samples.

Denne håndboken er ment som hjelp til nye prøvetakere på nordsjøsild. Håndboken henviser til hvor man finner nyttige dokumenter og aktuelle linker som en trenger som tekniker ved Pelagisk fisk, hvordan en nordsjøsildprøve skal opparbeides og leseregler for alderslesing av nordsjøsildotolitter. I tillegg er det laget en referansesamling av nordsjøsildotolitter. Referansesamlingen kan også brukes av erfarne lesere for å sjekke at man holder seg til lesereglene og ikke begynner å drifte.