Blar i ICES CM documents authored by IMR scientists (1949-2011) på tittel
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Equivalent beam angles for several standard transducers
(ICES CM documents, 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 ... -
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 ... -
Establishment of new wintering areas in herring co-occur with peaks in recruit to spawner ratio
(ICES CM documents;2009/H:11, Working paper, 2009)During late summer, Norwegian spring-spawning herring migrate to wintering areas, where they remain for about five months in dense aggregations. First-time spawning cohorts typically adopt the overwintering area of the ... -
Esterase variation in herring studied by isoelectric focusing
(ICES CM Documents;1997/AA:1, Working paper, 1997)Few suitable genetic characteristics for studying herring population structure are available, and the main aim of the study reported here has been to reveal traits which display useful genetic variations for application ... -
Estimated hatching date and growth history of Norwegian spring spawning herring (Clupea harengus L.) from otolith data of larvae of the 1990 yearclass
(ICES CM Documents;1991/H:14, Working paper, 1991)This study was performed on herring larvae of the 1990 yearclass of Norwegian spring spawners. The larvae were caught in May on the Norwegian shelf in the area from 64 °N - 69 °N. There was one size group of larvae with ... -
Estimates of capelin trawl efficiency by comparing the available fish with the actual catch.
(ICES CM Documents;1979/B:23, Working paper, 1979)Swept volume trawl efficiency for two different trawls were determined to be 28 and 60%, respectively by comparing the volume densities of capelin determined by echointegrator, with catch size and swept volume of the ... -
Estimates of mackerel stock composition in different areas and reasons as indicated by a cestone parasite
(ICES CM documents, Working paper, 1983)Recently collected data support earlier indications of the value of the plerocercus of the trypanorhynch oestone Grillotia angeli as a biological tag for estimating the size of the Western stock component in populations ... -
Estimates of mackerel stock composition in different areas and seasons as indicated by a cestode parasite
(ICES CM Documents;1982/H:46, Working paper, 1982) -
Estimates of stock size of cod, haddock, redfish and Greenland halibut in the Barents Sea and the Svalbard area autumn 1988
(ICES CM documents, Working paper, 1989)Combined acoustic and bottom trawl survey for cod, haddock and redfish were carried out in autumn 1988 in the Svalbard area together with an acoustic survey in the Barents Sea. The abundance indicies of cod decreased from ... -
Estimates of stock size of cod, haddock, redfish and greenland halibut in the Barents Sea and the Svalbard area, autumn 1987
(ICES CM Documents;1988/G:44, Working paper, 1988)Combined acoustic and bottom trawl survey for cod and haddock were carried out in the Svalbard area together with an acoustic survey in the Barents Sea in autumn 1987. The abundance index in numbers of cod continued ... -
Estimates of stock size of Northeast Arctic cod and haddock from survey data 1986/1987
(ICES CM documents, Working paper, 1987)Combined acoustic and bottom trawl survey for cod and haddock were carried out in the Svalbard area in autumn 1986 and in the Barents Sea during the winter 1987. An acoustic survey for spwaning cod was carried out in March ... -
Estimates of stock size of northeast Arctic cod and haddock, "Sebastes mentella" and "Sebastes marinus" from survey data, winter 1988
(ICES CM Documents;1988/G:43, Working paper, 1988)An acoustic survey and a bottom trawl survey for cod and haddock were carried out in the Barents Sea during the winter 1988. The fish still had the westerly distribution established in the previous year, but the echo ... -
Estimates of stock size of northeast arctic cod and haddock, Sebastes mentella and Sebastes marinus from survey data, winter 1989
(ICES CM documents, Working paper, 1989)The combined acoustic and bottom trawl survey in the Barents Sea in winter has been carried out since 1981. The target species are cod and haddock, but in recent years the redfish species Sebastes marinus and Sebastes ... -
Estimates of towing time in surveys
(ICES CM documents, Working paper, 2002)To decide the start and stop time for a survey haul the current method used in Norwegian sampling are the data from the door sensors and height sensors of the trawl. When the trawl has achieved its right geometry, the start ... -
Estimating Abundance of Seals in a Drifting Environment: 2005: Pup Production of Harp Seals, Pagophilus groenlandicus, in the Northwest Atlantic
(ICES CM Documents;2005/R:06, Working paper, 2005)Photographic and visual aerial surveys to determine current pup production of northwest Atlantic harp seals were conducted off Newfoundland and Labrador (the “Front”), and in the Gulf of St. Lawrence during March 2004. ... -
Estimating and decomposing total uncertainty for survey-based abundance estimates of Norwegian spring-spawning herring
(ICES CM documents, Working paper, 2006)We demonstrate how the total uncertainty of the abundance estimate and abundanceat- age estimate of Norwegian spring-spawning herring are affected by uncertainty in the parameters of vessel avoidance, shadowing and depth ... -
Estimating catch-at-age from market sampling data using a Bayesian hierarchical model
(ICES CM documents, Working paper, 2001) -
Estimating initial stomach content using stochastic simulation
(ICES CM Documents;1994/G:16, Working paper, 1994)The stomach evacuation model now in use when quantifying the predation from cod on Barents Sea capelin assumes that the evacuation rate is dependent on the stomach fullness after the last meal, which is not known in the ... -
Estimating the maturity ogive for northeast- arctic cod by a modified mesh assessment model
(ICES CM Documents;1983/G:33, Working paper, 1983)