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Acoustic estimates of the Barents Sea capeling stock 1971-1976
(ICES CM documents, Working paper, 1977)The surveys were carried out in June and in August - October. No estimates were obtained for 0-group capelin. 1 year old capeling are grossly underestimated in June. To a lesser extent this is also the case for older ... -
Acoustic extinction in dense herring layers, measured from a bottom-mounted transducer
(ICES CM documents, Working paper, 2006)Herring is often found in dense aggregations or schools, and acoustic shadowing is thus a problem in acoustic survey estimates. Knowledge of the attenuated echo intensity in herring aggregations is essential for correcting ... -
Acoustic investigation of fish behaviour apropos avoidance reaction
(ICES CM Documents;1981/B:21, Working paper, 1981) -
Acoustic measurements of schooling herring. Estimation of school biomass and target strength
(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 ... -
Acoustic method for estimating absolute abundance of young cod and haddock in the Barents Sea
(ICES CM documents, Working paper, 1979) -
Acoustic methods in studies of fish ecology
(ICES CM documents, Working paper, 1998)Systematic use of echo sounder in fisheries and marine science comrnenced in the 1930's and developed rapidly after World War II. During the 1950's and 1960's large scale echo surveys were carried out in many regions as a ... -
Acoustic portrait of herring in Vestfjord, january 1996, with geostatistical analysis
(ICES CM Documents;1996/H:31, Working paper, 1996)In January 1996 the stock of Norwegian spring-spawning herring (Clupea harengus) was acoustically surveyed in the wintering area. Both immature and mature fish were present. Because of the comparative lateness of the ... -
Acoustic properties of Salpa thompsoni.
(ICES CM documents;2009 / I:01, Working paper, 2009)Salps are common members of the world oceans planktonic community (Madin, et.al., 2006). In the southern ocean, both krill (Euphausia superba) and salps (Salpa thompsoni) can occur in dense aggregations (Loeb et al, 2009, ... -
Acoustic sampling volume for cod
(ICES CM Documents;1989/B:5, Working paper, 1989)This is expressed through the effective equivalent beam angle * for cod as represented by measurements of the tilt angle dependence of target strength. The functional form of * is approximated for each of several behaviour ... -
Acoustic sampling volume versus equivalent beam angle
(ICES CM Documents;1988/B:5, Working paper, 1988)Irnprovements in target strength measurement have shown the equivalent beam angle (EBA) to be a worrisome source of error in echo integrator surveys. The reason is that the EBA is generally defined as a purely physical ... -
Acoustic survey of deep-water fish of the Skagerrak
(ICES CM Documents;1992/H:15, Working paper, 1992)Introduction: Two fish species, the greater silver smelt Argentina silus and the roundnose grenadier Coryphaenoides rupestris, are highly abundant in the deep-water areas of the Skagerrak. Since the 1970s, a small aimed ... -
Acoustic survey on blue whiting in the Norwegian Sea, August / September 1985
(ICES CM Documents;1985/H:4, Working paper, 1985)Seven research vessels from USSR, Norway, GDR, Iceland and the Faroes participated in the fourth ICES-coordinated acoustic survey on blue whiting in the Norwegian Sea and adjacent waters. Blue whiting were recorded over ... -
Acoustic visualization of large scale macroplankton and micronekton distributions across the Norwegian shelf and slope of the Norwegian Sea.
(ICES CM Documents;1993/L:44, Working paper, 1993)We present results from acoustical (38 kHz split beam) surveys, biological sampling (trawling, zooplankton nets), and measurements of physical parameters (salinity, temperature, currents) across and along the shelf ... -
Acute toxicity of some byproducts from vinylchloride production to saithe (Pollachius virens)
(ICES CM Documents;1971/E:11, Working paper, 1971) -
Adaptive management of living marine resources by integrating different data sources and key ecological processes (ADMAR): A joint effort by IMR and CEES
(ICES CM documents;2010/R:26 Poster;, Working paper, 2010-09) -
Addressing uncertainty to facilitate participatory governance
(ICES CM documents;2009/R:17, Working paper, 2009) -
Advances in Bergen Echo Integrator
(ICES CM Documents;1993/B:28, Working paper, 1993)The Bergen Echo Integrator (BEl) is a software system designed for convenient postprocessing of echo sounder data. BEl is realized in international standards and is essentially machine independent. Development of BEl for ... -
Advisory Committee on Fishery Management (ACFM) Minutes from May 2005 [ICES HQ, 26 May – 2 June 2005]
(ICES CM documents;2005/MCAP:06, Working paper, 2005) -
Aerial and visual surveys to estimate harp seal pup production in the Greenland Sea
(ICES CM documents, Working paper, 1993)In March-April 1991 a combined expedition using fixed-wing aircraft and ship-borne helicopter was carried out to estimate harp seal pup production in the Greenland Sea (the West Ice). Photographs were taken from the ... -
Age and Growth of Mackerel from Skagerrak and the Northern North Sea
(ICES CM Documents;1969/H:7, Working paper, 1969)