ICES CM documents authored by IMR scientists (1949-2011): Recent submissions
Now showing items 921-940 of 3138
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Estimation of predation mortalities on capelin using a cod - capelin model for the Barents Sea
(ICES CM Documents;1990/H:16, Working paper, 1990)The Barents Sea capelin stock collapsed during the period 1983-1986. One of the main factors causing the collapse was a rapid increase in consumption of capelin by cod. Based on measurements of stomach evacuation rates ... -
Growth of Polar cod (Boreogadus saida) in the Barents Sea
(ICES CM Documents;1990/G:47, Working paper, 1990)Observed length-at-age, and backcalculated lengths based on otolith measurements, from samples of polar cod collected in the Barents Sea in autumn of 1987 to 1989, were analysed. An increase in individual length growth ... -
Growth of scallop juveniles (Pecten maximus L.) in an enriched shallow seawater basin
(ICES CM Documents;1990/K:23, Working paper, 1990)The aim of this work was to see if a shallow, enriched seawater basin was a suitable location for scallop culture. Growth of great scallop juveniles (Pecten maximus L.) was compared with two open sea locations, and the ... -
Report of the Atlanto-Scandian Herring and Capelin Working Group [Copenhagen, 15- 19 October, 1990]
(ICES CM Documents;1991/Assess:6, Working paper, 1991) -
Simultaneous two-sphere two-transducer calibration
(ICES CM Documents;1990/B:23, Working paper, 1990)When directional transducers are mounted nearby, the central lobes of their beam patterns may partly overlap at ranges typical for standard-target suspension in calibration exercises, e.g., 20 m. According to the ... -
Impact of size-selective mortality on waterfleas (Daphnia)
(ICES CM Documents;2010/M:25, Working paper, 2010)Size‐selective predation shapes species and induces changes in life‐history traits. Exposure to sizeselective mortality will make being the size that is vulnerable dangerous and possibly fatal; thus, if small individuals ... -
Report of the Working Group on the Assessment of the Stocks of Sardine, Horse Mackerel and Anchovy [Copenhagen, 20- 29 June, 1990]
(ICES CM Documents;1990/Assess:24, Working paper, 1990) -
Induced deformities on larvae of the Atlantic halibut (Hippoglossus hippoglossus L.). A new experimental approach.
(ICES CM Documents;1990/F:45, Working paper, 1990)Introduction: The atlantic halibut is viewed as a promising species for cold water aquaculture, and have been subjected to extensive research efforts both in Norway and in U.K. the later years. As the biology, and ... -
A field intercomparison between an acoustic current profiler / ADCP and two Savonius type current meters
(ICES CM Documents;1990/C:30, Working paper, 1990)During an introductory experiment in Lofoten May 1990 data from a vessel mounted ADCP on an anchored research vessel were intercompared with corresponding data from two anchored rotor current meters in a region where the ... -
Studies on environmental conditions and influence on salmon farm production
(ICES CM Documents;1990/F:35, Working paper, 1990)The study was undertaken to investigate how environmental conditions influence growth of Atlantic salmon, and how different sub groups of salmon respond to different environment. The fish were raised at five different ... -
Analysis of spatial variability of Georges Bank haddock (Melanogrammus aeglefinus) from trawl survey data using a linear regression model with spatial interaction
(ICES CM Documents;1990/D:36, Working paper, 1990)A regression model with spatially autocorrelated errors is used to test if there is systematic spatial variation across the study area in haddock catch per tow data from the NEFC annual fall survey from 1963 - 1987. A ... -
Report from a special meeting of the Multispecies Assessment Working Group [Bergen, 23- 27 April, 1990]
(ICES CM Documents;1990/Assess:28, Working paper, 1990) -
Report of the Working Group on Genetics [by correspondence]
(ICES CM Documents;1990/F:15, Working paper, 1990) -
Report of the Working Group on Environmental Impacts of Mariculture [Aberdeen, 27- 31 March, 1990]
(ICES CM Documents;1990/F:12, Working paper, 1990) -
Report of the Study Group on the Applicability of Spatial Statistical Techniques to Acoustic Survey Data [Brest, 4- 6 April, 1990]
(ICES CM Documents;1990/D:34, Working paper, 1990) -
Definition of the problem of estimating fish abundance over an area from acoustic line-transect measurements of density
(ICES CM Documents;1990/D:25, Working paper, 1990)The problem of acoustic abundance estimation is briefly reviewed. Under proper conditions, fish density can be measured with high accuracy along line transects. Observed variations in fish density consequently reflect ... -
Report of the Working Group on Fisheries Acoustic Science and Technology [Rostock, 26- 27 April, 1990]
(ICES CM Documents;1990/B:45, Working paper, 1990) -
Schooling-by-size in the Barents Sea capelin stock
(ICES CM Documents;1990/D:28, Working paper, 1990)This paper analyses the biological samples of capelin taken by the Institute of Marine Research, Bergen, on annual stock assesment surveys in the Barents Sea from 1972 to 1989. The dependency between mean length of ... -
Equivalent beam angles for several standard transducers
(ICES CM Documents;1990/B:21, Working paper, 1990)Nominal values for the equivalent beam angle are given for several transducers. These are the standard split-beam transducers designed for the SIMRAD EK500 scientific echo sounder, with operating frequencies of 38 and 120 ... -
Bad-weather calibration of split-beam echo sounder systems
(ICES CM Documents;1990/B:22, Working paper, 1990)A condition for standard-target calibration is stability of the sonar platform and target rig. This condition cannot always be met, nor need it be when the transducer has a split-beam function. Since the position of ...