Kartlegging av fremmede marine arter i Rogaland
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2012-03Metadata
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Original version
Husa V, Heggøy E, Agnalt A-L, Sjøtun K, Svensen R, Rokkan-Iversen K, Alvestad T. 2012. Kartlegging av fremmede marine arter i Rogaland. Utredning for DN 3-2012. Direktoratet for naturforvaltning.Abstract
The method Rapid Coastal Survey was
applied in 36 marinas in the county of
Rogaland during five days in august 2010.
27 introduced species were targeted in this
investigation. No new species to Norway
was found, but six species already established
in Norway were observed at a number
of sites. The ascidian Styela clava, native to
northwest Pacific, was recorded at eleven
sites in the county, and was most abundant
at sites near Stavanger, where the species
was recorded for the first time in 1990. The
Japanese wire weed Sargassum muticum was
recorded on 26 of 36 sites, and was quite
abundant on many of them. The method is
well suited for mapping of sessile organisms
in shallow waters, but is less applicable
for recordings of mobile animals such as
crustaceans.