Browsing by Author "Misund, Ole Arve"
Now showing items 1-20 of 78
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Abundance estimation of schools using a fisheries sonar
Misund, Ole Arve; Floen, Svein (ICES CM Documents;1991/B:35, Working paper, 1991)An attempt of abundance estimation of fish schooling close to surface using sonar was conducted in Eastern North Sea - Skagerrak in September 1990. The method is based on measurements of the school area by the Furuno ... -
Acoustic investigations of pilchard and sardinella schooling behaviour in Namibia and Angola. 16 April - 6 May 1998
Misund, Ole Arve; Coetzee, Janet; Luyeye, Nkosi; Oechslin, Gerhard (Reports on surveys with the R/V Dr Fridtjof Nansen;1998404, Report, 1998) -
Acoustic measurements of schooling herring. Estimation of school biomass and target strength
Misund, Ole Arve; Øvredal, Jan Tore (ICES CM Documents;1988/B:26, Working paper, 1988)The connections between reflected echo energy and dimensions of fatty herring schools were studied by a combination of multibeam sonar and a calibrated echo integration unit. A relation between the area and the biomass ... -
An experimental survey of the abundance, spatial distribution, schooling behaviour and acoustic backscatter of the Namibian pilchard. Preliminary report 14 June - 2 July 1999
Misund, Ole Arve; Buckle, W.; Cloete, Rudi; Coetzee, Janet; Dalen, John; Fossen, Inge; Haugland, Eli; Horne, John K.; Jech, Mike; Luyeye, Nkosi; Oechslin, Gerhard; Olsen, Magne; Totland, Bjørn (Reports on surveys with the R/V Dr Fridtjof Nansen;1999407, Report, 1999) -
An intership sonar calibration experiment in the Norwegian Sea
Misund, Ole Arve; Jakupsstovu, Stein Hjalti (ICES CM Documents;1996/B:22, Working paper, 1996)When migrating in the Norwegian Sea in spring and summertime, the Norwegian spring spawning herring will be surveyed by vessels from four nations. Because the herring may occur in schools close to the surface, use of ... -
A PC-based echo integrator system appliable for school structure analyzis
Floen, Svein; Totland, Bjørn; Øvredal, Jan Tore; Misund, Ole Arve (ICES CM Documents;1991/B:43, Working paper, 1991)A low cost system for integration of echo signals on a PC has been developed. The system calculates the area backscattering strength in surface and bottom layers, and is designed both for the purpose of conventional ... -
Await in the pelagic: herring compromising reproduction and survival within a vertically split school
Axelsen, Bjørn Erik; Misund, Ole Arve; Fernö, Anders; Nøttestad, Leif; Johannessen, Arne (ICES CM documents, Working paper, 1998) -
‘Await’ in the pelagic: dynamic trade-off between reproduction and survival within a herring school splitting vertically during spawning
Axelsen, Bjørn Erik; Nøttestad, Leif; Fernö, Anders; Johannessen, Arne; Misund, Ole Arve (Journal article; Peer reviewed, 2000-10-19)Spatio-temporal aspects of spawning behaviour were investigated in a single school of Norwegian spring-spawning herring Clupea harengus, and are explained by changes in the relative importance of reproduction, predation ... -
Behaviour of Norwegian spring spawning herring in relation to underwater light
Beltestad, Arvid K.; Misund, Ole Arve (ICES CM Documents;1988/B:24, Working paper, 1988)The Norwegian coastal purse seiners, with shallow nets, have experienced difficulties in catching the herring due to their natura! behaviour being located too deep during day time and toe scattered during night time. ... -
Benefit Surveys. Multifrequency acoustic target identification, maltisampler trawling, trophic interaction and sonar studies 12 - 30 June 2000
Coetzee, Janet; Misund, Ole Arve; Merkle, Dagmar; Soule, Mike; Rogers, Charlene; Skeide, Roar; Kreiner, Anja; Granville, Louw; Cooper, Rob; Maree, Ralton; Haugland, Eli; Tanci, Tembaletu; Galie, Ebraham; Mjanger, Magnar; Johannesen, Jarle; Berry, Shawn; Terrry, Megan; Jones, Susan; Malan, Envor (Reports on surveys with the R/V Dr Fridtjof Nansen;No 4/2000 - 2000406, Report, 2000) -
Bestandsmålinger kan nå gjøres med ekkolodd og sonar
Misund, Ole Arve (Havforskningsnytt, Working paper, 1996) -
Characteristics of sardinella aggregations in Angolan waters
Dalen, John; Misund, Ole Arve; Luyeye, Nkosi; Boyer, D.; Coetzee, Janet; Cloete, Rudi; Oechslin, Gerhard (ICES CM documents, Working paper, 1998) -
Complete acoustic recording of water column scatters and sea bed characteristics.
Knudsen, Hans Petter; Melle, Webjørn; Misund, Ole Arve; Ona, Egil; Aksnes, Dag Lorents; Seirup, Hans Petter (The Journal of the Acoustical Society of America, Others, 2001) -
Computerbased detection of schools for counting, quantification of size and swimming behavior by the SIMRAD SA950 sonar
Totland, Bjørn; Misund, Ole Arve (ICES CM Documents;1993/B:17, Working paper, 1993)As a help in stock assessment of pelagic, schooling fish a software for detection of schools and quantification of their size and swimming behaviour by a high resolution sonar has been developed. The system reads the ... -
Cruise report [26/5 - 22/6, 1995]
Misund, Ole Arve ([Toktrapport/Havforskningsinstituttet];, Working paper, 1995-06-22) -
Cruise report [29/4 - 28/5, 1996]
Misund, Ole Arve ([Toktrapport/Havforskningsinstituttet];, Working paper, 1996-05-28) -
Cruise report [3/4 - 18/4, 1996]
Misund, Ole Arve ([Toktrapport/Havforskningsinstituttet];, Working paper, 1996) -
Cruise report [6/4 - 20/4, 1997]
Misund, Ole Arve ([Toktrapport/Havforskningsinstituttet];, Working paper, 1997) -
Distribution and behavioural dynamics of ocean feeding Norwegian spring spawning herring: observations across spatio-temporal scales
Misund, Ole Arve; Nøttestad, Leif; Mackinson, Steven; Guenette, Sylvie; Pitcher, Tony; Fernö, Anders (ICES CM documents, Working paper, 1998) -
Dynamics of moving masses: Variability in packing density and shape among pelagic schools
Misund, Ole Arve (ICES CM Documents;1990/B:40, Working paper, 1990)The packing density and external shape of herring, saithe and sprat schools in the North Sea and along the Norwegian coast are measured acoustically. The packing density was inversely. related to the fish size, but species ...