Browsing SINTEF Open by Author "Larsen, Roger B."
Now showing items 21-40 of 48
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Effect of grid section design on trawl size selectivity
Sistiaga, Manu; Herrmann, Bent; Brinkhof, Jesse; Larsen, Roger B. (Journal article; Peer reviewed, 2023)Sorting grids are introduced in trawl fisheries to improve size selectivity and reduce the variability of results obtained with sorting devices constructed of netting e.g., codends. Grids are rigid or semi-rigid structures ... -
Effect of lifting the sweeps on bottom trawling catch efficiency on the Northeast arctic cod trawl fishery
Sistiaga, Manu Berrondo; Grimaldo, Eduardo; Herrmann, Bent; Larsen, Roger B.; Tatone, Ivan (SINTEF Fiskeri og havbruk;A26220, Research report, 2014-07-01)Fuel consumption and environmental concerns have led bottom trawlers fishing for cod (Gadus morhua) in the Barents Sea to use semi-pelagic doors. However, this change may affect fish herding and consequently the catch ... -
The effect of long-term use on the Catch efficiency of Biodegradable gillnets
Grimaldo, Eduardo; Herrmann, Bent; Jacques, Nadine; Kubowicz, Stephan; Cerbule, Kristine; Su, Biao; Larsen, Roger B.; Vollstad, Jørgen (Peer reviewed; Journal article, 2020)The effect of long-term use on the catch efficiency of biodegradable gillnets was investigated during commercial fishing trials and in controlled lab aging tests. The relative catch efficiency between biodegradable and ... -
Effect of the Nordmøre grid bar spacing on size selectivity, catch efficiency and bycatch of the Barents Sea Northern shrimp fishery
Larsen, Roger B.; Herrmann, Bent; Sistiaga, Manu; Brinkhof, Jesse; Cerbule, Kristine; Grimaldo Vela, Eduardo Enrique; Lomeli, Mark JM (Peer reviewed; Journal article, 2022)The introduction of the Nordmøre grid in shrimp trawls has reduced the bycatch of non-target species. In the Norwegian Northern shrimp (Pandalus borealis) fishery, the mandatory selective gear consists of a Nordmøre grid ... -
Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery
Herrmann, Bent; Sistiaga, Manu Berrondo; Larsen, Roger B.; Brinkhof, Jesse (Journal article; Peer reviewed, 2019-11)Shrimp trawlers often use a Nordmøre sorting grid ahead of a small mesh codend to avoid bycatch of juvenile fish while allowing shrimps to be efficiently caught. However, small fish can pass through the grid to enter the ... -
Field demonstration of a novel towed, area bubble-plume zooplankton (Calanus sp.) harvesting approach
Grimaldo, Eduardo; Leifer, Ira; Gjøsund, Svein Helge; Larsen, Roger B.; Jeuthe, Henrik (SINTEF Fiskeri og havbruk rapporter;A103038, Research report, 2010-05-25)This paper presents field experiment results of using a new technology to harvest copepods (Calanus sp.) in the ocean by bubble upwelling. Two largo-scale bubble rafts, a 21 m2 and a flexible 75 m2 bubble raft with tow ... -
Fishing efficiency of biodegradable PBSAT gillnets and conventional nylon gillnets used in Norwegian cod (Gadus morhua)and saithe (Pollachius virens)fishery.
Grimaldo, Eduardo; Herrmann, Bent; Vollstad, Jørgen; Su, Biao; Føre, Heidi Moe; Larsen, Roger B.; Tatone, Ivan (Journal article; Peer reviewed, 2018-09-10)Fishing trials were carried out to compare the relative fishing efficiency of gillnets made of a new biodegradable resin (polybutylene succinate co-adipate-co-terephthalate, PBSAT) with conventional (nylon) nets. The fishing ... -
Ghost fishing efficiency by lost, abandoned or discarded pots in snow crab (Chionoecetes opilio) fishery
Cerbule, Kristine; Herrmann, Bent; Grimaldo, Eduardo; Brinkhof, Jesse; Sistiaga, Manu; Larsen, Roger B.; Bak-Jensen, Zita (Journal article; Peer reviewed, 2023)Marine pollution by lost, abandoned or otherwise discarded fishing gear (ALDFG) often has negative impact on the ecosystem through plastic pollution and continuous capture of marine animals, so-called “ghost fishing”. ALDFG ... -
Governance implications for the implementation of biodegradable gillnets in Norway
Standal, Dag; Grimaldo, Eduardo; Larsen, Roger B. (Peer reviewed; Journal article, 2020)Gillnets are among the most widely used fishing gear in global fisheries because of their simplicity, high operability, catch efficiency and low entrance cost for fishermen. In Norway, the Northeast Atlantic (NEA) cod ... -
Improving release efficiency of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) in the Barents Sea demersal trawl fishery by stimulating escape behaviour.
Grimaldo, Eduardo; Sistiaga, Manu Berrondo; Herrmann, Bent; Larsen, Roger B.; Brinkhof, Jesse; Tatone, Ivan (Journal article; Peer reviewed, 2017-05-03)We tested the ability of stimulators to improve the release efficiency of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) through the meshes of a square mesh section installed in a trawl. The section was tested ... -
Internasjonal teineteknologi sett opp mot norske forhold Kan canadisk teineteknologi være et altenativ i det norske torskefiskeriet.
Rindahl, Lasse; Henriksen, Edgar; Larsen, Roger B. (SINTEF Fiskeri og havbruk;A19944, Research report, 2011-07-11)På tross av at det har vært jobbet mye med utvikling av teine i Norge har dette redskapet ikke oppnådd tilstrekkelige fangstrater tit å få innpass i kommersielt fiskeri, selv om prinsippet med teinedrift er ønsket av ... -
Is there a limit to the potential effects of shortening lastridge ropes on the size selectivity of diamond mesh codends?
Sistiaga, Manu; Herrmann, Bent; Brinkhof, Jesse; Larsen, Roger B.; Santos, Juan; Stepputtis, Daniel; Brinkhof, Ilmar; Jacques, Nadine; Cerbule, Kristine; Petetta, Andrea; Cuende, Elsa; Kvalvik, Liz Beate Kolstad (Journal article; Peer reviewed, 2023)Shortening codend lastridge ropes can be an effective fishing gear modification to improve the size selection properties in diamond mesh codends. Lastridge ropes attached to codend selvedges withstand the longitudinal ... -
Make it simpler and better: T90 codend improves size selectivity and catch efficiency compared with the grid-and-diamond mesh codend in the Northeast Atlantic bottom trawl fishery for gadoids
Brinkhof, Jesse; Larsen, Roger B.; Herrmann, Bent (Peer reviewed; Journal article, 2021)The use of a sorting grid followed by a size-selective codend with minimum 130 mm mesh size is compulsory in the Northeast Atlantic demersal trawl fishery targeting cod (Gadus morhua), haddock (Melanogrammus aeglefinus), ... -
Managing size selectivity: the relevance of compulsory and alternative selection devices in the Northeast Atlantic bottom trawl fishery
Brinkhof, Jesse; Sistiaga, Manu; Herrmann, Bent; Grimaldo Vela, Eduardo Enrique; Larsen, Roger B. (Peer reviewed; Journal article, 2022)Two decades of use of the compulsory selectivity gear configuration in the Northeast Atlantic bottom trawl fishery, which consists of a rigid sorting grid followed by a diamond mesh codend, have revealed problems with ... -
MultiSEPT - Full scale tests of the semicircular spreading gear (SCSG)
Grimaldo, Eduardo; Sistiaga, Manu Berrondo; Larsen, Roger B.; Tatone, Ivan; Olsen, fredrik (SINTEF Fiskeri og havbruk;A24271, Research report, 2013-06-24)This report describes full scale tests at sea with the semi-circular spreading gear (SCSG). This activity is part of Work Package 3 (WP3: Development of new ground gear of the MultiSEPT project. spreading of the SCSG and ... -
Performance of the Nordmøre grid in shrimp trawling and potential effects of guiding funnel length and light stimulation
Larsen, Roger B.; Herrmann, Bent; Sistiaga, Manu Berrondo; Brinkhof, Jesse; Tatone, Ivan; Langård, Lise (Journal article; Peer reviewed, 2017-01)The introduction of the Nordmøre grid to shrimp trawls has reduced the issue of bycatch to that of small-sized species and juveniles that are able to pass through the grid and enter the small-meshed cod end together with ... -
Potential for codends with shortened lastridge ropes to replace mandated selection devices in demersal trawl fisheries
Sistiaga, Manu; Brinkhof, Jesse; Herrmann, Bent; Larsen, Roger B.; Grimaldo, Eduardo; Cerbule, Kristine; Brinkhof, Ilmar; Jørgensen, Terje (Peer reviewed; Journal article, 2021) -
Quantification of bell-shaped size selectivity in shrimp trawl fisheries using square mesh panels and a sorting cone after a Nordmøre grid
Sistiaga, Manu Berrondo; Herrmann, Bent; Larsen, Roger B.; Brinkhof, Jesse (Journal article; Peer reviewed, 2019-09-12)Shrimp trawlers in the Barents Sea use a Nordmøre sorting grid ahead of a small-mesh codend to avoid bycatch while catching shrimps efficiently. However, small fish can still pass through the grid to enter the codend, which ... -
Quantification of catch composition in fisheries: A methodology and its application to compare biodegradable and nylon gillnets
Cerbule, Kristine; Savina, Esther; Herrmann, Bent; Larsen, Roger B.; Feekings, Jordan Paul; Krag, Ludvig Ahm; Pellegrinelli, Alina (Peer reviewed; Journal article, 2022)When evaluating fishing gear catches, the focus is often on a few species as opposed to the entire catch. In some fisheries this can lead to ignoring major part of catch composition. Thus, there is a need for a more holistic ... -
Quantification of gear inflicted damages on trawl-caught haddock in the Northeast Atlantic fishery
Sistiaga, Manu; Herrmann, Bent; Brinkhof, Jesse; Larsen, Roger B.; Jacques, Nadine; Santos, Juan; Gjøsund, Svein Helge (Journal article; Peer reviewed, 2020-08)External damages are indicators of the overall quality of fish and fish welfare. Haddock is an important commercial species widespread in the North Atlantic, but few studies related to quality have been carried out on this ...