Blar i ICES CM documents authored by IMR scientists (1949-2011) på emneord "VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924"
Viser treff 121-140 av 493
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Height and spread of the Danish seine
(ICES CM Documents;1988/B:29, Working paper, 1988)Height and spread of trawls is successfully measured by the wireless "Scanmar" system. Several experiments made by fishermen have shown that this system will not work on the Danish seine. A modified version of the ... -
Hermod, a single species model for the Norwegian spring spawning herring stock
(ICES CM Documents;1994/H:11, Working paper, 1994)HERMOD is a model for the population dynamics and migration of the Norwegian Spring spawning herring that is being developed with the double purpose of being an independent single species model and of being integrated ... -
Herring Tagging Experiment at Bløden Ground 1957 Part III : An analysis of the results to December 1957
(ICES CM Documents;, Working paper, 1957) -
Herring Tagging Experiment at Bløden Ground Part II (A preliminary report)
(ICES CM Documents;, Working paper, 1957) -
Holistic evaluation of management policies: What are the consequences of modified gear use on Georges Bank?
(ICES CM documents;2009/ O:26, Working paper, 2009)Georges Bank haddock is a recently recovered fish stock in the New England groundfish fishery. Due to federal constraints under the Magnuson-Steven Act, however, this stock cannot be optimally exploited due to the bycatch ... -
How and why acoustic detectability and catchability of herring change with individual motivation and physiological state in a variable environment: a multi-scale study on a local herring population in southwestern Norway
(ICES CM documents, Working paper, 2006)The understanding of distribution and aggregation in herring (Clupea harengus) can be enhanced by integrated multi-scale studies in small ecosystems. Hydro-acoustics, underwater cameras, herring and predator gillnet samples ... -
How many trawl hauls, and how many fish from each haul are needed to obtain a given precision in the age structure estimate for Norwegian spring spawning herring? A bootstrap approach
(ICES CM documents, Working paper, 2006)The Norwegian spring spawning herring is assessed each year from acoustic surveys. The age structure in the stock is estimated from trawl samples. Typically, about 10 trawl samples are taken per survey, and 100 fish from ... -
How to correct fish density estimates for extinction
(ICES CM Documents;1990/B:24, Working paper, 1990)There have been many experimental studies on acoustic shadowing, but once the effect is quantified, how is the compensation to be effected? This work shows how, through postprocessing of stored time series, containing ... -
Hull mounted, protruding transducer for improving echo integration in bad weather
(ICES CM documents, Working paper, 1990)A 38 kHz split beam survey transducer has been mounted on the tip of a 4 m vertical protrusile stabilizing keel of the United States NOAA fishery research vessel R/V Miller Freeman. Air blocking problems, generally ... -
Hull mounted, protruding transducer for improving echo integration in bad weather
(ICES CM Documents;1990/B:31, Working paper, 1990)A 38 kHz split beam survey transducer has been mounted on the tip of a 4 m vertical protrusile stabilizing keel of the United States NOAA fishery research vessel R/V Miller Freeman. Air blocking problems, generally ... -
ICES coordinated acoustic survey of ICES divisions IIIa, IVa, IVb AND Via (North) 2002 Results and long term trends
(ICES CM documents, Working paper, 2003)Six surveys were carried out during late June and July covering most of the continental shelf north of 54oN in the North Sea and to the west of Scotland to a northern limit of 62oN. The eastern edge of the survey area ... -
ICES herring tagging experiments in 1957 and 1958
(ICES CM Documents;1960/6, Working paper, 1960) -
Image analysis at the Institute of Marine Research, Norway
(ICES CM Documents;1993/L:75, Working paper, 1993)Computer-aided analysis of images is a technology gaining importance and utilization in marine science. Whereas analyses by eye are often tedious, slow and inaccurate, state-of-the-art image analysis is rapid, accurate, ... -
Improved calibration of hydroacoustic equipment with copper spheres
(ICES CM Documents;1981/B:20, Working paper, 1981) -
In situ determination of bottom trawl ground gear contact
(ICES CM documents, Working paper, 2001)Exact definition of towed distance with proper ground gear contact is an essential parameter in bottom trawl swept area estimates of fish abundance. Errors in this key parameter may lead to a first order bias in abundance ... -
In situ of Cape horse mackerel (Trachurus capensis)
(ICES CM Documents;1999/J:4, Working paper, 1999)The acoustical target strength (TS) of Cape horse mackerel (Trachurus capensis) was measured in situ at 38 kHz using a submersible split beam transducer in combination with a SIMRAD EK 500 echosounder. The transducer ... -
In/out-flow of coastal water in Vestfjorden
(ICES CM Documents;1978/C:51, Working paper, 1978)Hydrographic sections in Vestfjorden, Northern Norway, during winter 1977 showed strong horizontal temperature gradients on the west side of the fjord indicating an outflow of cold coastal water. Analysis of sea thermograph ... -
Industrial Fisheries Working Group [ICES headquarters, 23 February -1 March, 1983]
(ICES CM Documents;1983/Assess:7, Working paper, 1983) -
Intensive production of cod fry systems and results so far
(ICES CM Documents;1983/F:24, Working paper, 1983) -
Inter-calibration of participating vessels in the ICES coordinated surveys of North Sea herring
(ICES CM Documents;1998/OPEN:23, Working paper, 1998)Summary: Three pairwise acoustic inter-calibrations of the performance of EK500 scientific echosounders were carried out in July 1997. The first inter-calibration was carried out at about 57 40'N by OE by GO Sars and ...