Effekter av tarehøsting på fisk og skalldyr Nord-Trøndelag 2012
Research report
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http://hdl.handle.net/11250/113919Utgivelsesdato
2013-04-16Metadata
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- Fisken og havet (1958- ) [700]
Sammendrag
The Institute of Marine Research studied effects of kelp (Laminaria hyperborea) harvesting
on nearshore fish and crab abundance in Nord-Trøndelag in August 2012. Recordings were
made using fixed underwater camera systems and traditional fish and crab catching gear in
kelp harvested areas and in reference kelp beds. Recordings of fish varied between the kelp
harvested area and the reference area, but no significant variation in fish recordings before
and after kelp harvesting were observed. A significant reduction in recordings of larger
groups of fish from 2011 to 2012 was evident, but this reduction was not larger in harvested
areas than in reference kelp beds, and is likely not an effect of the kelp harvest activity.
Gadoids (70% of the total catches) and labrids (18% of the total catches) were the most
frequently caught fishes in Nord-Trøndelag in 2012. Apart from increasing the catchability of
Goldsinny wrasse (Ctenolabrus rupestris), no significant effects of kelp harvesting on fish
and crab catches were observed in Nord-Trøndelag in 2012.