Blar i Brage IMR på forfatter "Bjordal, Åsmund"
-
Norsk fiskeribistand for bærekraftig forvaltning
Bjordal, Åsmund (Havforskningsnytt;Nr. 5-2016, Working paper, 2016) -
Norwegian development cooperation in fisheries – from traditional fisheries aid to sustainable management
Bjordal, Åsmund (Havforskningsnytt;No. 6 - 2013, Working paper, 2013) -
Ny "sjøfugl-skremme" løser gammelt problem for lineflåten
Løkkeborg, Svein; Bjordal, Åsmund (Havforskningsnytt, Working paper, 1992) -
Oppdrettsanlegg tiltrekker villfisk
Bjordal, Åsmund; Skar, Anne Brit (Havforskningsnytt, Working paper, 1992) -
Overvintring av bergnebb (Ctenolabrus rupestvis) i lukkede teiner
Skog, Kjetil; Mikkelsen, Kent Olav; Bjordal, Åsmund (Fisken og havet, Research report, 1994)This report describes a pilot-study on overwintering of wrasse that had been used for delousing of salmon. Four groups of 50 goldsinny were kept in wrasse pots with blinded entrances, submerged to 2- 13 m depth. From ... -
Rapport - Forsøksfiske etter mesopelagiske arter : M/S Ligrunn, september 2019
Bjordal, Åsmund (Rapport fra havforskningen;2019 - 56, Research report, 2019)De siste 50 år har det vært spredte forsøk på høsting av mesopelagisk fisk. Etter globalt rekordestimat av denne ressursen, ble det rundt 2015 ny interesse for å utvikle et fiskeri etter mesopelagiske arter. Havforskning ... -
The response of mesopelagic organisms to artificial lights
Underwood, Melanie; Palm, Anne Christine Utne; Øvredal, Jan Tore; Bjordal, Åsmund (Peer reviewed; Journal article, 2020)Though mesopelagic fish respond to natural light (e.g., diurnal vertical migration), few studies have looked at how they respond to artificial light and if artificial lights could be used in commercial operations to improve ... -
Rømt oppdrettslaks
Bjordal, Åsmund; Furevik, Dag M. (Havforskningsnytt, Working paper, 1991) -
Size selective effects of a plastic body on longline hooks
Løkkeborg, Svein; Bjordal, Åsmund; Skeide, Roar L. (ICES CM Documents;1991/B:46, Working paper, 1991)The potential for improving size selectivity of longlines by using a plastic body attached to the hook shank was tested in a fishing trial for tusk (Brosme brosme), ling (Molva molva) and haddock (Melanogrammus aeglefinus). ... -
Sortering av leppefisk i høve til maskevidde
Bjordal, Åsmund; Mikkelsen, Kent Olav (Havforskningsnytt, Working paper, 1993) -
Surface activity of Atlantic salmon (Salmo salar) in net pens
Furevik, Dag M.; Huse, Ingvar; Bjordal, Åsmund; Fernö, Anders (ICES CM Documents;1988/F:19, Working paper, 1988)An important feature of the behaviour of salmon is the leaping and rolling activity. These surface activities were studied in fish in net pens in relation to environmental factors and operational procedures. Data were ... -
Swivel connected gangions in mechanized longlining - effect on cath rates and operation
Bjordal, Åsmund (ICES CM Documents;1987/B:18, Working paper, 1987)Multifilament longline with swivel connection between gangions and mainline were compared with traditionally rigged gear on a vessel equipped with a mechanized longline system. The swivel-lines were adapted to the ... -
Synergistic effects of different baits on the same hook in the longline fishery for hake (Merluccius merluccius) and torsk (Brosme brosme)
Franco, Jose M.; Bjordal, Åsmund; Løkkeborg, Svein (ICES CM Documents;1987/B:39, Working paper, 1987)The effects of a combination of different baits on the same hook were tested in two different situations. A bait combination of sardine (Sardina pilchardus) and mackerel (Scomber scombrus) was used to catch hake (Merluccius ... -
Tagging of saithe (Pollachius virens L.) at a Norwegian fish farm : preliminary results on migration
Bjordal, Åsmund; Skar, Anne Brit (ICES CM documents, Working paper, 1992)Wild fish, particularly saithe (Pollachius virens L.) are commonly observed in the vicinity of fish farm sea cages on the Norwegian west coast and the fish are known to feed on excess salmon food pellets. To investigate ... -
Testing of a new hook design (E-Z-Baiter) through comparative longline fishing trials
Skeide, Roar L.; Bjordal, Åsmund; Løkkeborg, Svein (ICES CM Documents;1986/B:25, Working paper, 1986) -
Testing of a new hook design in the longline fishery for tusk (Brosme brosme) and ling (Molva molva)
Bjordal, Åsmund (ICES CM Documents;1987/B:20, Working paper, 1987)The EZ-Baiter Circle hook which is a hybrid design between the classical J- and Circle hook shapes, is developed to provide a more effective hook for use in mechanized longline systems. In comparative fishing trials, ... -
The Effect of Gangion Floats on Bait-loss and Catch Rates in Longlining
Bjordal, Åsmund (ICES CM Documents;1984/B:8, Working paper, 1984)The use of gangion floats will expectedly reduces bait loss and increase catch rates in bottom longlining. Two floats of 5- and 8 g buoyancy are tested through flume tank experiments, underwater observations in the field ... -
The effect of shading in pen rearing of Atlantic salmon (Salmo salar)
Huse, Ingvar; Bjordal, Åsmund; Fernö, Anders; Furevik, Dag M. (ICES CM Documents;1988/F:18, Working paper, 1988)A full scale pen rearing experiment with covers to reduce illumination was carried out. No significant effects were observed on growth, mortality, ectoparasite infection, maturation or net pen fouling. -
Wrasse as cleaner-fish for farmed salmon
Bjordal, Åsmund (Journal article, 1991)In aquarium and sea cage experiments four wrasse species from Norwegian waters were identified as facultative cleaners, with lice infested salmon (Salmo salar) as the host: goldsinny (Ctenblabrus rupestris), rock cook ...