Detailed visual seabed survey at drilling site 7218/11-1
Detailed visual seabed survey at drilling site 7218/11-1
Detailed visual seabed survey at drilling site 7218/11-1
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Figure9. Generaldistribution of habit<strong>at</strong>-forming spongesin the NEAtlantic and NordicSeasas indic<strong>at</strong>edby<br />
recordsin the OSPAR[…]d<strong>at</strong>abase.Concentr<strong>at</strong>ionof spongesvaryconsiderablywithin theseareas.<br />
In the BarentsSea,spongec<strong>at</strong>chesin trawls(fisheriesandresearch)havebeennoted (Figure10). The<br />
following is an extract from OSPAR(2010). "The western Barents Sea is well known for mass<br />
occurrencesof spongesfrom numerousscientificand fishermen sources(reviewedby Klitgaard&<br />
Tendal2004).Between150and 350m depth,spongesof up to 1 m diameterandcontributingup to<br />
95-98 %of the localtotal biomasssamplesand up to 5-6 kg*m-2 were found to occuron sandyand<br />
sandy-silty bottom with good w<strong>at</strong>er movement. The speciescomposition correspondsto the<br />
“Atlantic“ band group as describedby Klitgaardand Tendal(2004,seeabove)and includesGeodia<br />
barretti, G.macandrewi,Geodia(former Isops)phlegraei,I. pyriformes, andother species."<br />
<strong>Detailed</strong> <strong>site</strong> <strong>survey</strong> <strong>at</strong> PL531 Darwin<br />
Akvaplan-niva AS Rapport 6051 - 1 15
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