dc.contributor.author | Gjøsæter, Jakob | |
dc.date.accessioned | 2008-08-07T13:32:01Z | |
dc.date.issued | 1986 | |
dc.identifier.issn | 0333-2594 | |
dc.identifier.uri | http://hdl.handle.net/11250/115074 | |
dc.description.abstract | Mesopelagic fish were studied using 38 and 50 kHz echo
sounders and electronic integrators on cruises covering the
Norwegian Deep, Skagerrak, the slope north of the North Sea and
west of the British Isles during 1971-1976. Samples of the fish
were taken using comrnercial pelagic trawls.
In Norwegian waters Maurolicus muelleri was the dominant
species and the estimated stock size in the area covered ranged
between 20 000 and 1 600 000 tonnes. No seasonal variation in
abundance could be traced.
West of the British Isles Notoscopelus kroeyeri seemed
most important, followed by M. Muelleri. Estimated stock size
ranged between about 0.3 to 13 million tonnes.
All the stock size estimates are tentative, as the density
coefficient used to convert echo abundance to fish biomass is
not known for the species involved, and a coefficient worked
out for another fish species had therefore to be used. | en |
dc.format.extent | 669052 bytes | |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | en |
dc.publisher | Havforskningsinstituttet | en |
dc.relation.ispartofseries | Flødevigen rapportserie | en |
dc.relation.ispartofseries | 1, 1986 | en |
dc.title | Estimates of the abundance of mesopelagic fish off southern Norway and west of the British Isles 1971-1976. In: Flødevigen rapportserie no 1, 1986 | en |
dc.type | Research report | en |
dc.source.pagenumber | 1-22 | en |