Browsing Brage IMR by Author "Mackinson, Steven"
Now showing items 1-7 of 7
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Differences between near bottom biomass spatial structure observed in the Irish Sea, the North Sea and the Barents Sea in recent years
Mireille, Bouleau; Nicolas, Bez; Hjellvik, Vidar; Godø, Olav Rune; Reid, David; Beare, Douglas; Greig, Tony; Armstrong, Mike; Gerritsen, Hans D.; Mackinson, Steven; Neville, Suzanna; Kooij, Jeroen van der; Vérin, Yves; Massé, Jacques (ICES CM documents, Working paper, 2003)Based on acoustic data and trawl catches collected during bottom trawl surveys, we compare the spatial structure of the biomass available in the first meters above the bottom in three different regions, the Barents Sea ... -
Distribution and behavioural dynamics of ocean feeding Norwegian spring spawning herring: observations across spatio-temporal scales
Misund, Ole Arve; Nøttestad, Leif; Mackinson, Steven; Guenette, Sylvie; Pitcher, Tony; Fernö, Anders (ICES CM documents, Working paper, 1998) -
Migration behaviour of herring along the cold front in the Norwegian Sea in April 1997
Misund, Ole Arve; Fernö, Anders; Guenette, Sylvie; Mackinson, Steven; Melle, Webjørn; Nøttestad, Leif; Slotte, Aril (ICES CM Documents;1997/EE:12, Working paper, 1997)The behaviour of Norwegian spring spawning herring when migrating to the feeding areas in the Norwegian Sea in April was mapped by an acoustic survey in 1997. The distribution of herring was recorded by conventional echo ... -
Positive relationships between bottom trawl and acoustic data
Beare, Douglas; Reid, David; Greig, Tony; Bez, Nicholas; Hjellvik, Vidar; Godø, Olav Rune; Bouleau, Mireille; Kooij, Jeroen van der; Neville, Suzanna; Mackinson, Steven (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 ... -
Space-time recapture dynamics of PIT-tagged Northeast Atlantic mackerel (Scomber scombrus) reveal size-dependent migratory behaviour
Ono, Kotaro; Slotte, Aril; Hølleland, Sondre Nedreås; Mackinson, Steven; Jónsson, Sigurður Þór; Jacobsen, Jan Arge; Ólafsdóttir, Anna Heiða (Peer reviewed; Journal article, 2022)Based on GIS-mapping and semi-parametric modelling of recaptures from PIT-tag experiments in the North Sea nursery area (September 2011), the Celtic Seas spawning area (May-June 2014-2021) and the Icelandic Waters feeding ... -
The challenge of the herring in the Norwegian Sea: making optimal collective spatial decision
Fernö, Anders; Melle, Webjørn; Misund, Ole Arve; Pitcher, Tony; Nøttestad, Leif; Mackinson, Steven; Hollingworth, Charles (ICES CM Documents;1996/H:15, Working paper, 1996)Herring are long-lived multiple spawners exhibiting strong variation in reproductive and recruitment success between years. They tend to adopt low-risk, preferred-conservative strategies; for example, shifts to alternative ... -
Using artificial neural networks to combine acoustic and trawl data in the Barents and North Seas
Neville, Suzanna; Hjellvik, Vidar; Mackinson, Steven; Kooij, Jeroen van der (ICES CM documents, Working paper, 2004)Groundfish have a wide and variable distribution making the use of trawling alone a highly inadequate sampling method. Trawl data provide species identification and numbers over a very small area and habitat type while ...