Browsing Published externally by Author "Engås, Arill"
Now showing items 1-11 of 11
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Accuracy of VMS data from Norwegian demersal stern trawlers for estimating trawled areas in the Barents Sea
Skaar, Kristian; Jørgensen, Terje; Ulvestad, Bente Hoddevik; Engås, Arill (Journal article; Peer reviewed, 2011-06-08)The accuracy of vessel monitoring system (VMS) data, used to determine fishing activity in the trawl fishery for gadoids in the Barents Sea, was studied by observer notes and Global Positioning System (GPS) data from two ... -
Behavior-dependent selectivity of yellowtail flounder (Limanda ferruginea) in the mouth of a commercial bottom trawl
Underwood, Melanie; Winger, Paul D.; Fernø, Anders; Engås, Arill (Journal article; Peer reviewed, 2015-09-02)To improve the efficiency of a commercial bottom trawl for catching yellowtail flounder (Limanda ferruginea), we studied the behavior of individuals in the middle of the trawl mouth. Observations were conducted with ... -
Collecting size-selectivity data for Antarctic krill (Euphausia superba) with a trawl independent towing rig
Krag, Ludvig Ahm; Krafft, Bjørn Arne; Engås, Arill; Herrmann, Bent (Peer reviewed; Journal article, 2018)For the development of efficient trawls to minimize catch loss, escape mortality and potential negative ecosystem impacts from the fishery, the understanding about trawl selectivity processes are crucial. Small crustaceans ... -
Day and night fish distribution pattern in the net mouth area of the Norwegian bottom-sampling trawl
Engås, Arill; Ona, Egil (Journal article; Peer reviewed, 1990)A high-frequency scanning sonar, mounted as a net sonde, was used to study fish behaviour in the mouth area of the Norwegian bottom-sampling trawl. Fish distribution patterns were significantly different by day and night. ... -
Deep Vision: An In-Trawl Stereo Camera Makes a Step Forward in Monitoring the Pelagic Community
Underwood, Melanie J.; Rosen, Shale; Engås, Arill; Eriksen, Elena (Journal article; Peer reviewed, 2014-11-13)Ecosystem surveys are carried out annually in the Barents Sea by Russia and Norway to monitor the spatial distribution of ecosystem components and to study population dynamics. One component of the survey is mapping the ... -
Effects of seismic shooting on local abundance and catch rates of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus)
Engås, Arill; Løkkeborg, Svein; Ona, Egil; Soldal, Aud Vold (Journal article; Peer reviewed, 1996)To determine whether seismic exploration affected abundance or catch rates of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus), acoustic mapping and fishing trials with trawls and longlines were conducted in the ... -
Employing a trawl independent multi-compartment towing rig to study selectivity of crustaceans in trawls
Krag, Ludvig Ahm; Krafft, Bjørn Arne; Engås, Arill; Herrmann, Bent (Conference object, 2016-09-22) -
Quantifying the escape mortality of trawl caught Antarctic krill (Euphausia superba)
Krafft, Bjørn Arne; Krag, Ludvig Ahm; Engås, Arill; Nordrum, Sigve; Bruheim, Inge; Herrmann, Bent (CCAMLR;WG-EMM-16/04, Conference object, 2016) -
Quantifying the Escape Mortality of Trawl Caught Antarctic Krill (Euphausia superba)
Krafft, Bjørn Arne; Krag, Ludvig Ahm; Engås, Arill; Nordrum, Sigve; Bruheim, Yngve; Herrmann, Bent (Journal article; Peer reviewed, 2016-09-13)Antarctic krill (Euphausia superba) is an abundant fishery resource, the harvest levels of which are expected to increase. However, many of the length classes of krill can escape through commonly used commercial trawl mesh ... -
Size Selection of Antarctic Krill (Euphausia superba) in Trawls
Krag, Ludvig A.; Herrmann, Bent; Iversen, Svein A.; Engås, Arill; Nordrum, Sigve; Krafft, Bjørn A. (Journal article; Peer reviewed, 2014-08-08)Trawlers involved in the Antarctic krill (Euphausia superba) fishery use different trawl designs, and very little is known about the size selectivity of the various gears. Size selectivity quantifies a given trawl’s ability ... -
Under-ice observations by trawls and multi-frequency acoustics in the Central Arctic Ocean reveals abundance and composition of pelagic fauna
Ingvaldsen, Randi Brunvær; Eriksen, Elena; Gjøsæter, Harald; Engås, Arill; Schuppe, Birte Katarina; Assmann, Karen; Cannaby, Heather Anne; Dalpadado, Padmini; Bluhm, Bodil (Peer reviewed; Journal article, 2023)The rapid ongoing changes in the Central Arctic Ocean call for baseline information on the pelagic fauna. However, sampling for motile organisms which easily escape vertically towed nets is challenging. Here, we report the ...