Browsing Brage IMR by Subject "VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921"
Now showing items 601-620 of 2165
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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 variable is the fecundity within and between cod stocks?
(ICES CM documents, Working paper, 2005)Stock reproductive potential is determined by the number of fish at age, sex ratio, proportion of mature female at age and fecundity. Fecundity data, which are fundamental in estimating egg production are not collected ... -
Hummerbestanden i Norge med særlig vekt på Skagerrak
(Flødevigen meldinger;Nr. 4 - 1991, Working paper, 1991) -
Hummerreservater på Skagerrakkysten
(Havforskningsnytt, Working paper, 2007)Nå er områdevern innført for å gjenoppbygge den norske hummerbestanden, som det har vist seg vanskelig å beskytte ved hjelp av tradisjonelle reguleringstiltak. -
ICES herring tagging experiments in 1957 and 1958
(ICES CM Documents;1960/6, Working paper, 1960) -
ICES symposium on herring stocks 1977
(ICES CM Documents;1975/H:55, Working paper, 1975) -
ICES Working Group on the Bløden Tagging Experiment : Report on the Meeting at Charlottenlund 29 March to 2 April 1971
(ICES CM Documents;1971/H:3, Working paper, 1971) -
Ichthyophonus hoferi disease in the herring in Norwegian waters
(ICES CM Documents;1992/H:27, Working paper, 1992)After the discovery of I. hoferi disease in Norwegian spring spawning herring in summer 1991, a program for systematic surveillance of the disease in the herring in Norwegian waters was developed. The programme, which ... -
Ikke store mengder [Asgeir Aglen kommenterer kysttorskfunnene utenfor 12-mila]
(Others, 2009-06-10) -
Impact of equatorial Kelvin waves on aggregations of sardinellas (Sardinella spp.) in Angolan waters.
(ICES CM documents;2007/G:08, Working paper, 2007)High yields of pelagic fish in Angolan tropical waters are associated with seasonal upwelling. The Angolan upwelling is forced by a large-scale eastward tilt of the main thermocline in the tropical Atlantic. Near the ... -
The impacts of different management strategies and environmental forcing in ecological communities
(Journal article; Peer reviewed, 2006-07-05)Understanding the effects of population management on the community a target species belongs to is of key importance for successful management. It is known that the removal or extinction of a single species in a community ... -
Implications of fisheries-induced evolution for stock rebuilding and recovery
(Journal article; Peer reviewed, 2009-07-31)Worldwide depletion of fish stocks has led fisheries managers to become increasingly concerned about rebuilding and recovery planning. To succeed, factors affecting recovery dynamics need to be understood, including the ... -
Implications of fisheries-induced evolution for stock rebuilding and recovery
(ICES CM documents;2010/M:29, Working paper, 2010)Fishing-induced evolution has the potential to change life-history and other characters of exploited stocks. Here we study the rebuilding and recovery of an exploited stock with en individual-based eco-genetic model ... -
Import of furunculosis to Norway with Atlantic salmon smolts from Scotland
(ICES CM Documents;1987/F:8, Working paper, 1987)In early summer 1985 the Norwegian Veterinary Authorities authorized the import of about 250.000 Atlantic salmon smolts from a fish farm at the west coast of Scotland to the Namdal region north of Trondheim. Immediately ... -
"Import" av fiskeyngel til norske farvann [HELP 35]
(help;1990 nr. 35, Research report, 1990)Fordelingen av fiskeyngel i norske farvann om våren og sommeren indikerer sterkt at noe av denne yngelen er "importert" fra gytefelt utenfor det økosystemet som omfatter norskekysten og Barentshavet. Dette gjelder for ... -
Importance of fast ice and glacier fronts for female polar bears and their cubs during spring in Svalbard, Norway
(Journal article; Peer reviewed, 2012-02-13)Arctic sea ice is declining rapidly, making it vital to understand the importance of different types of sea ice for ice-dependent species such as polar bears Ursus maritimus. In this study we used GPS telemetry (25 polar ... -
IMR status report on the Barents Sea Ecosystem, 2004-2005
(Working paper, 2005) -
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 ... -
Inadequate risk assessments – A study on worst-case scenarios related to petroleum exploitation in the Lofoten area
(Journal article; Peer reviewed, 2013-08-28)Heated debates are currently taking place on whether to open the area of Lofoten and Vesteralen in Northern Norway for petroleum production. Seismic explorations in this area have indicated promising petroleum resources. ... -
Including climate into the assessment of future fish recruitment, using multiple regression models.
(ICES CM documents, Working paper, 2005)Climate variability has generally not been included in the assessment of fish stocks in the Barents Sea and Norwegian Sea. However, in recent years there has been a focus on implementing climate variability in the assessment ...