Blar i ICES CM documents authored by IMR scientists (1949-2011) på forfatter "Svellingen, Ingvald"
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Oil production structures in the North Sea as fish aggregating devices
Brønstad, Oddvar; Humborstad, Odd-Børre; Jørgensen, Terje; Løkkeborg, Svein; Svellingen, Ingvald; Soldal, Aud Vold (ICES CM documents, Working paper, 1998)The paper deals with a study aimed at investigating whether underwater structures from decommissioned oil platforms in the North Sea can be used as artificial fish reefs or protection habitats for fish. The experimental ... -
Quantifying the amount of fish unavailable to a bottom trawl by use of an upward looking transducer
Michalsen, Kathrine; Aglen, Asgeir; Somerton, David; Svellingen, Ingvald; Øvredal, Jan Tore (ICES CM documents, Working paper, 1999)When surveying demersal fish with a wide and variable vertical distribution, it is desirable to combine information from a bottom trawl survey with the information from a hydroacoustic survey into an absolute abundance ... -
Simple calibration of a split-beam echo-sounder
Svellingen, Ingvald; MacLennan, David N. (ICES CM Documents;1986/B:8, Working paper, 1986) -
Some pitfalls of short-range standard-target calibration
Ona, Egil; Foote, Kenneth G.; Zhao, Xianyong; Svellingen, Ingvald (ICES CM Documents;1996/B:36, Working paper, 1996)Often it is necessary or desirable to perform a standard-target calibration at rather short range, for example, because of shallow water or interest in measuring animals at short range. A number of general range-dependent ...