Blar i Brage IMR på emneord "VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924"
Viser treff 301-320 av 725
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Optimal acoustic beam pattern corrections for split beam transducers
(ICES CM Documents;1990/B:30, Working paper, 1990)Precise in situ target strength estimates of fish can only be made when the effect of the transducer directivity is totally removed from the recorded target amplitudes. By guiding a standard calibration target through ... -
Optimization of purse seines by large meshed sections and low lead weight. Theoretical considerations, sinking speed measurements and fishing trials.
(ICES CM Documents;1988/B:25, Working paper, 1988)Theoretical considerations on material requirements and sinking speed by use of different mesh size and lead weight in purse seines are outlined. Measurements confirmed that the sinking speed varied with mesh size and ... -
Optimum size of sampling unit for estimating the density of marine populations
(ICES CM Documents;1989/D:22, Working paper, 1989)Data from several trawling experiments and from some scallop dredge surveys indicate that, within limits, a srnaller sampling unit can be more effective than a larger unit for marine abundance surveys. Taking into account ... -
Oversikt over tokt og faste oseanografiske stasjoner tatt i 2009
(Fisken og havet;3-2010, Research report, 2010-04-14)The report presents cruises carried out by the research vessels ”G. O. Sars”, ”Johan Hjort”, ”Håkon Mosby”, ”G. M. Dannevig”, “Jan Mayen” and some hired commercial fishing vessels on behalf of the Institute of Marine ... -
Oversikt over tokt og faste oseanografiske stasjoner tatt i 2009
(Fisken og havet;3-2010, Research report, 2010-04-14)The report presents cruises carried out by the research vessels ”G. O. Sars”, ”Johan Hjort”, ”Håkon Mosby”, ”G. M. Dannevig”, “Jan Mayen” and some hired commercial fishing vessels on behalf of the Institute of Marine ... -
Oversikt over tokt og faste oseanografiske stasjoner tatt i 2010
(Fisken og havet;6-2011, Research report, 2011-09-01)The report presents cruises carried out by the research vessels ”G. O. Sars”, ”Johan Hjort”, ”Håkon Mosby”, ”G. M. Dannevig”, “Jan Mayen” and some hired commercial fishing vessels on behalf of the Institute of Marine Research ... -
Oversikt over tokt og faste oseanografiske stasjoner tatt i 2011
(Fisken og havet;2-2012, Research report, 2012-03-16)The report presents cruises carried out by the research vessels "G.O. Sars". "Johan Hjort", "Håkon Mosby", "G.M. Dannevig", ''Jan Mayen" / "Helmer Hanssen" and some hired commercial fishing vessels on behalf of the ... -
The Oxymeter
(ICES CM Documents;1963/, Working paper, 1963) -
PC-based echo integration system for fish behaviour studies
(ICES CM Documents;1988/B:35, Working paper, 1988)An echo integration system presenting the distribution and vertical and horizontal movements of fish in net pens, is described. The system can be configured to multiplex up to 16 transducers sequentially. The number of ... -
Pelagisk tråling etter torskefisk : Pelagic trawling for cod
(Havforskningsnytt;Nr. 5 - 2010, Working paper, 2010)Pelagic trawling does no harm to benthic fauna and reduces bycatches, and is sometimes an alternative to bottom trawling when fishing for cod. Selection abilities are the same as for bottom trawling. A newly developed ... -
The performance of a three axis ultrasonic current sensor when integrated into an oceanographic data acquisition system.
(ICES CM Documents;1979/C:52, Working paper, 1979) -
Performance of an acoustic sonde design
(ICES CM Documents;1994/L:30, Working paper, 1994)The potential of multi-frequency acoustic technology for quantifying fish and plankton is widely recognized. At a U.S. GLOBEC workshop in 1991, one of the considered problems was measuring macrozooplankton and micronekton. ... -
Pigmentation of salmonids: Factors affecting carotenoid deposition in rainbow trout (Salmo gairdneri)
(ICES CM Documents;1984/F:23, Working paper, 1984)Factors affecting carotenoid deposition in rainbow trout (Salmo gairdneri) were investigated in three feeding experiments. The deposition of astaxanthin in the flesh increased significantly with increasing levels of ... -
Pinging down the food web: multi-frequency acoustic discrimination of jellyfish and fish
(ICES CM Documents;2004/R:6, Working paper, 2004)Jellyfish are gaining increasing prominence in many pelagic marine ecosystems worldwide. It has been argued that jellyfish-dominated communities will be the end-point in ecosystems perturbed by high fishing effort, and ... -
Posisjonslister for faste snitt
(Research report, 2000-06) -
Positive relationships between bottom trawl and acoustic data
(ICES CM documents, Working paper, 2004)Demersal fish stock biomass is usually estimated using commercial landings data, ‘tuned’ by various types of survey data, usually trawl. When collecting fish data by trawl it is only possible to take relatively small numbers ... -
Power-budget and echo-integrator equations for fish abundance estimation
(Fisken og Havet;10-2013, Research report, 2013-12-31)For abundance estimation and species identification on fisheries acoustic surveys, control with temperature and finite amplitude effects in the sea demands the calibration factor C of the conventional echo-integrator ... -
Predation by Benguela hake (Merluccius polli) on commercially exploited shrimps (Parapenaeus longirostris and Aristeus varidens) in Angolan waters.
(ICES CM documents, Working paper, 1997) -
Prediction of capelin growth for use in CapTool
(IMR/PINRO Joint Report Series;2/2005, Conference object, 2005) -
Prediction of capelin growth for use in CapTool
(IMR/PINRO Joint Report Series;2/2005, Conference object, 2005)