Blar i ICES CM documents authored by IMR scientists (1949-2011) på forfatter "Misund, Ole Arve"
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Relationships between the geometric dimensions and biomass of schools
Misund, Ole Arve; Aglen, Asgeir; Beltestad, Arvid K.; Dalen, John (ICES CM Documents;1990/B:41, Working paper, 1990)Acoustic measurements of the geometric dimensions and packing density of herring, sprat and saithe schools have been conducted by multi-beam sonars and echo integrator systems. Relationships between the reflected echo ... -
Report on surveys of the distribution, abundance and migrations of the Norwegian spring-spawning herring, other pelagic fish and the environment of the Norwegian Sea and adjacent waters in late winter, spring and summer of 1997
Vilhjálmsson, Hjálmar; Misund, Ole Arve; Arrhenius, Fredrik; Holst, Jens Christian; Gislason, Ástthor; Gudmundsdottir, Asta; Jacobsen, Jan Arge; Krysov, Alexander; Malmberg, Svend-Aage; Reid, David (ICES CM Documents;1997/Y:4, Working paper, 1997)The distribution and migrations of Norwegian spring spawning herring in the Norwegian Sea in the spring and summer of 1997 were mapped during 11 coordinated surveys carried out by Faroese, Icelandic, Norwegian, Russian ... -
Sampling herring in the Norwegian Sea by pelagic trawl
Misund, Ole Arve (ICES CM Documents;1997/W:21, Working paper, 1997)When the stock of Norwegian spring-spawning herring is distributed in the Norwegian Sea in summertime, pelagic trawl sampling may be rather challenging because of substantial variation in vertical distribution (from ... -
School geometry measurements using a sonar accuracy and an algorithm for school detection
Misund, Ole Arve (ICES CM Documents;1991/B:36, Working paper, 1991)The accuracy of geometric measurements of schools, using horizontal guided single-beam or multi-beam sonar, is simulated. For both types of sonars, the accuracy is dependent of horizontal beam-width and range. As multiple ... -
Seasonal changes in distribution and aggregation characteristics of sardinella species in Angolan waters
Misund, Ole Arve; Luyeye, Nkosi (ICES CM documents, Working paper, 1998) -
Size-selection of mackerel and saithe in purse seine
Misund, Ole Arve; Beltestad, Arvid K. (ICES CM Documents;1994/B:28, Working paper, 1994)In purse seine fisheries, there may exist potentials for size selection because some of the fish in the catch are less than the legal size, and because different size groups are paid differently. Both potentials are ... -
Sonar observations of schooling mackerel during purse seining
Misund, Ole Arve (ICES CM Documents;1988/B:27, Working paper, 1988)The swimming behaviour and horizontal dimensions of mackerel schools have been quantified by use of a multibeam, true motion sonar during purse seining in the Northern North Sea, August 1986. The horizontal dimensions ... -
A sonar study of the migration pattern of Norwegian spring-spawning herring (Clupea harengus L.) in July
Kvamme, Cecilie; Nøttestad, Leif; Fernö, Anders; Misund, Ole Arve; Dommasnes, Are; Axelsen, Bjørn Erik (ICES CM documents, Working paper, 2000)About 700 schools of Norwegian spring-spawning herring (Clupea harengus L.) were tracked by multi-beam sonar during transect surveys in the Norwegian Sea in July 1995 and 1996. This herring stock usually concentrates in ... -
Survival of mackerel and saithe escaping through sorting grids in purse seines
Beltestad, Arvid K.; Misund, Ole Arve (ICES CM Documents;1996/B:24, Working paper, 1996)Technology for efficient size-selection of mackerel and saithe in purse seines has been developed. A critical constraint for application of the technology is the survival of escaping fish. We have conducted a series of ... -
Swimming behaviour of fish schools in the North Sea during acoustic surveying and pelagic sampling trawling
Aglen, Asgeir; Misund, Ole Arve (ICES CM Documents;1990/B:38, Working paper, 1990)Swimming behaviour of schooling herring, mackerel and sprat, when approached by a survey vessel, was observed by aid of a true motion sonar. Observations were made both during surveying and during pelagic trawling. Horizontal ... -
Taking the consequences of international conventions, national policy and our own arguments: developing the way of working at the Institute of Marine Research, Norway, to deliver according to the ecosystem approach.
Misund, Ole Arve; Lønne, Ole Jørgen; Moksness, Erlend; Nepstad, Tore (ICES CM documents;2007/R:18, Working paper, 2007)Over the years The Institute of Marine Research, has been developed to become the leading body for monitoring and exploration of marine ecosystems, development of the aquaculture industry, and science based advices on ... -
The challenge of the herring in the Norwegian Sea: making optimal collective spatial decision
Fernö, Anders; Melle, Webjørn; Misund, Ole Arve; Pitcher, Tony; Nøttestad, Leif; Mackinson, Steven; Hollingworth, Charles (ICES CM Documents;1996/H:15, Working paper, 1996)Herring are long-lived multiple spawners exhibiting strong variation in reproductive and recruitment success between years. They tend to adopt low-risk, preferred-conservative strategies; for example, shifts to alternative ... -
Trawl sampling of small pelagic species off Angola. Effects of avoidance, towing speed, tow duration and time of day
Luyeye, Nkosi; Coetzee, Janet; Boyer, D.; Misund, Ole Arve (ICES CM Documents;1997/W:12, Working paper, 1997)A series of pelagic trawl sampling trials on pelagic species distributed near surface off Angola were conducted by R/V «Dr. Fridtjof Nansen» operating a medium sized pelagic trawl with a vertical opening of about 20 m. ... -
Variability in the spatial structure of three schooling pelagic species off Namibia
Misund, Ole Arve; Coetzee, Janet; Luyeye, Nkosi; Oechslin, Gerhard (ICES CM documents, Working paper, 1998)