Blar i Brage IMR på forfatter "Bjordal, Åsmund"
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A multiple approach to behaviour studies of salmon reared in marine net pens
Fernö, Anders; Furevik, Dag M.; Huse, Ingvar; Bjordal, Åsmund (ICES CM Documents;1988/F:15, Working paper, 1988)The behaviour of Atlantic salmon in culture was lnvestigated by various techniques with the ultimate goal of characterlzing the behaviour typical for a situation with rapid growth. Differences in behaviour between and ... -
A new radio link telemetry positioning system, experiences from tracking of fish and crustaceans
Bjordal, Åsmund; Engås, Arill; Soldal, Aud Vold; Øvredal, Jan Tore (ICES CM Documents;1993/B:23, Working paper, 1993)Telemetry positioning systems based on hydrophone arrays have been used for different tracking applications. The main improvement of this new system is the wire-less transmission of signals from hydrophone - radio buoys ... -
Assessment of commitments on sustainable fisheries to the Our Ocean conferences : Where are we now?
Huse, Geir; Loeng, Harald; Bjordal, Åsmund; Toresen, Reidar; Toft, Kari Østervold (Rapport fra havforskningen;2019 - 43, Research report, 2019)Many ocean commitments have been made at the five Our Ocean conferences since 2014 under six different areas of action. The Institute of Marine Research was given the task of evaluating the 182 commitments made to the ... -
Automatisk fôringskontroll via ekkoloddregistrering av fôrpellets
Bjordal, Åsmund; Furevik, Dag M. (Havforskningsnytt, Working paper, 1991) -
The behaviour of Norway lobster towards baited creels and size selectivity of creels and trawl
Bjordal, Åsmund (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1986)The behaviour of Norway lobster (Nephrops norvegicus L.) towards baited creels was studied by underwater television at three different localities. A typical nocturnal activity pattern was observed. Most of the individuals ... -
Betyr en økning i gytebestanden i dag at bestanden av norsk-arktisk torsk vil øke fremover?
Nedreaas, Kjell Harald; Bjordal, Åsmund (Havforskningsnytt, Working paper, 2002) -
Bidødelighet i fløytlinefisket etter hyse
Michalsen, Kathrine; Bjordal, Åsmund; Soldal, Aud Vold (Rapport fra senter for marine ressurser;Nr. 19 - 1993, Working paper, 1993) -
Biologisk avlusing fra kuriositet til anvendelse
Bjordal, Åsmund (Havforskningsnytt, Working paper, 1991) -
Capture techniques for wrasse (Labridae)
Bjordal, Åsmund (ICES CM Documents;1993/B:22, Working paper, 1993)An increasing demand for wrasse used as cleaner-fish for louse control in salmon farming has led to a new fishery for different wrasse species - particularly goldsinny, rock-cook and corkwing wrasse. This paper describes ... -
Cleaning symbiosis as an alternative to chemical control of sea lice infestation of Atlantic salmon
Bjordal, Åsmund (World Aquaculture Workshops;No. 4, Conference object, 1992) -
Cleaning symbiosis between wrasses (Labridae) and lice infested salmon (Salmo salar) in mariculture
Bjordal, Åsmund (ICES CM Documents;1988/F:17, Working paper, 1988)Epidemic infestation by the crustacean ectoparasitic salmon lice (Lepeophteirus salmonis) is a major problem in marine salmon farming. Cleaning symbiosis between different labrid species and lice infested salmon is ... -
Commitments to sustainable fisheries: Empty words or reality?
Huse, Geir; Bjordal, Åsmund; Loeng, Harald; Toft, Kari Østervold; Toresen, Reidar (Peer reviewed; Journal article, 2021)The Our Ocean conferences focus on voluntary commitments by different pledgers in support of actions towards a clean, healthy and productive ocean. We analysed the content and summarised the progress of implementation of ... -
An ecosystem approach to fisheries management in the Barents Sea
Bjordal, Åsmund; Boltnev, A. (IMR/PINRO Joint Report Series, Conference object, 2004) -
An ecosystem approach to fisheries management in the Barents Sea
Bjordal, Åsmund; Boltnev, A. (IMR/PINRO Joint Report Series, Conference object, 2004) -
Ecosystem approach to fisheries management in the Barents Sea [presentation]
Bjordal, Åsmund; Boltnev, A. (IMR/PINRO Joint Report Series;1/2004, Conference object, 2004) -
Ecosystem approach to fisheries management in the Barents Sea [presentation]
Bjordal, Åsmund; Boltnev, A. (IMR/PINRO Joint Report Series;1/2004, Conference object, 2004) -
Effect of attractant distribution on catch rate and size selection of Norway lobster caught by pots
Bjordal, Åsmund; Løkkeborg, Svein; Skeide, Roar L. (ICES CM Documents;1991/B:45, Working paper, 1991)In comparative fishing trials with Norway lobster (Nephrops norvegicus) pots, the attractant property of an aqueous extract of mackerel was tested against that of natural mackerel bait. The catch rate of the natural ... -
Effect of different long-line baits (mackerel, squid) on catch rates and selectivity for tusk and ling
Bjordal, Åsmund (ICES CM Documents;1983/B:31, Working paper, 1983) -
Effects of trawling and longlining on the yield and biomass of cod stocks - numerically simulated
Bjordal, Åsmund; Laevastu, Taivo (ICES CM Documents;1990/G:32, Working paper, 1990)Numerical studies were conducted on the effects of trawl and longline catches on a cod stock and possible yields from it. Five year mean age composition of Pacific cod (Gadus macrocephalus) from the Bering Sea was used ... -
Effects on salmon (Salmo salar) from different operational procedures in fish farming
Bjordal, Åsmund; Fernö, Anders; Furevik, Dag M.; Huse, Ingvar (ICES CM Documents;1988/F:16, Working paper, 1988)The effects on farmed salmon caused by operational procedures as handling, de-lousing, removal of dead fish, grading and transfer were studied by underwater TV-observations, ultrasonic telemetry of heart rate and analyses ...