Browsing SINTEF Open by Author "Herrmann, Bent"
Now showing items 81-100 of 117
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Prediction of size-dependent risk of salmon smolt (Salmo salar) escape through fish farm nets
Sistiaga, Manu Berrondo; Herrmann, Bent; Forås, Eskil; Frank, Kevin; Sunde, Leif Magne (Journal article; Peer reviewed, 2020-05)The escape of small smolt through farm cage netting is a major challenge faced by the Norwegian salmon farming industry. Escape can occur when the smolt placed in the cages are smaller than the size estimated by the farmers. ... -
Prediction of size-dependent risk of salmon smolt (Salmo salar) escape through fish farm nets
Sistiaga, Manu Berrondo; Herrmann, Bent; Forås, Eskil; Frank, Kevin; Sunde, Leif Magne (Journal article; Peer reviewed, 2020-05)The escape of small smolt through farm cage netting is a major challenge faced by the Norwegian salmon farming industry. Escape can occur when the smolt placed in the cages are smaller than the size estimated by the farmers. ... -
Predictive framework for codend size selection of brown shrimp (Crangon crangon) in the North Sea beam-trawl fishery
Santos, Juan; Herrmann, Bent; Stepputtis, Daniel; Gunther, Claudia; Limmer, Bente; Mieske, Bernd; Schultz, Sebastian; Neudecker, Thomas; Temming, Axel; Hufnagl, Marc; Bethke, Eckhard; Kraus, Gerd (Journal article; Peer reviewed, 2018-07-16)The brown shrimp (Crangon crangon) fishery is of great socio-economic importance to coastal communities on the North Sea. The fishery is exploited by beam trawlers often using codends with very small mesh sizes, leading ... -
Predictive models for codend size selectivity for four commercially important species in the Mediterranean bottom trawl fishery in spring and summer: Effects of codend type and catch size
Brčić, Jure; Herrmann, Bent; Sala, Antonello (Journal article; Peer reviewed, 2018-10-22)Models to predict codend size selectivity for four major commercial species—European hake (Merluccius merluccius), Norway lobster (Nephrops norvegicus), deep-water rose shrimp (Parapenaeus longirostris), and Atlantic horse ... -
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 ... -
Quantifying the performance of selective devices by combining analysis of catch data and fish behaviour observations: methodology and case study on a flatfish excluder
Santos, Juan; Herrmann, Bent; Stepputtis, Daniel; Kraak, Sarah B. M.; Gökce, Gökhan; Mieske, Bernd (Journal article; Peer reviewed, 2020-11-06)This article describes a method for the quantitative analysis of fish behaviour relative to selection devices in trawl gears. Based on video observations, the method estimates probabilities for a given event to happen and ... -
Reducing catch efficiency of rabbitfish (Siganus oramin) in a shrimp beam trawl fishery of the South China Sea
Yang, Bingzhong; Herrmann, Bent; Cheng, Zhaohai (Peer reviewed; Journal article, 2021)The bycatch of unwanted fish species is a main concern in shrimp beam trawl fishery of the South China Sea. This study evaluated the effect of using combined square-mesh and diamond-mesh codends (CSDM codends) on catch ... -
Reducing cod bycatch in flatfish fisheries
Santos, Juan; Stepputtis, Daniel; Oesterwind, Daniel; Herrmann, Bent; Lichtenstein, Uwe; Hammerl, Constanze; Krumme, Uwe (Peer reviewed; Journal article, 2022)Management measures to facilitate the recovery of fish stocks can lead to shifts in traditional fishing patterns and target species. In the Baltic Sea, drastic reductions in catch quota for cod (Gadus morhua) force mixed ... -
Release efficiency and selectivity of four different square mesh panel configurations in the Basque mixed bottom trawl fishery
Cuende, Elsa; Arregi, Luis; Herrmann, Bent; Sistiaga, Manu Berrondo; Basterretxea, Mikel (Journal article; Peer reviewed, 2020-03)Reduction of discards from the Basque mixed bottom trawl fishery is a challenge. To improve the selective properties of the gear used by the fleet and supplement codend size selection, a square mesh panel (SMP) installed ... -
Seleksjon i 4-panels enkeltristseksjon med- og uten løftepanel. Rapport fra fullskalaforsøk gjennomført ombord på tråleren "Ramoen" i perioden 28.oktober - 10.november 2013
Grimaldo, Eduardo; Lilleng, Dagfinn; Jørgensen, Terje; Sistiaga, Manu Berrondo; Herrmann, Bent (SINTEF Fiskeri og Havbruk reports;A25848, Research report, 2014-03-28)Resultatene fra toktet viste at løftepanelet foran sorteringsristen hadde en betydelig effekt på parameteren Cgrid, dvs. sannsynligheten for at en fisk kommer i kontakt med rista, og dermed på seleksjonen av torsk. Forskjellen ... -
Sequential codend improves quality of trawlcaught cod
Brinkhof, Jesse; Olsen, Stein Harris; Ingólfsson, Ólafur Arnar; Herrmann, Bent; Larsen, Roger B. (Journal article; Peer reviewed, 2018-10-10)Trawl-caught fish are frequently associated with deteriorated catch quality. This study presents a new dual sequential codend concept with the aim of improving the quality of trawl-caught fish by minimizing the frequency ... -
Shrimp trap selectivity in a Mediterranean small-scale-fishery
Kalogirou, Soteris A.; Pihl, Leif; Maravelias, Christos; Herrmann, Bent; Smith, C. J.; Papadopoulou, Nadia; Notti, Emilio; Sala, A. (Journal article; Peer reviewed, 2019-03)Small-scale shrimp trap fisheries, which have received very little attention in areas with limited potential for economic diversification, could offer a sustainable and socially beneficial option for profitable businesses ... -
Simple and effective: T90 codends improve size selectivity and catch efficiency compared with diamond-mesh codends for mantis shrimp (Oratosquilla oratoria) in demersal trawl fishery of the South China Sea
Yang, Bingzhong; Herrmann, Bent (Peer reviewed; Journal article, 2022)Size selectivity and catch efficiency of four codends were tested and compared for mantis shrimp (Oratosquilla oratoria) in demersal trawl fisheries of the South China Sea (SCS). These codends were differing in mesh shapes, ... -
Size selection and exploitation pattern of diamond mesh codends with different mesh sizes in demersal trawl fishery for banded scad (Caranx (Atule) kalla) in the South China Sea
Yang, Bingzhong; Herrmann, Bent; Yan, Lei; Li, Jie; Wang, Teng (Peer reviewed; Journal article, 2021)Size selection and exploitation pattern of diamond-mesh codends with different mesh sizes, 25 to 54 mm, for demersal trawl fishery targeting banded scad (Caranx (Atule) kalla) was tested and compared using the covered ... -
Size selection of Antarctic krill (Euphausia superba) in a commersial codend and trawl body
Herrmann, Bent; Krag, Ludvig Ahm; Krafft, Bjørn Arne (Journal article; Peer reviewed, 2018-11)During fishing, many fish species are able to avoid the net walls of the trawl body and so the majority of size selection occurs in the codend of the net. Antarctic krill (Euphausia superba) are regarded as true planktonic ... -
Size selection of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) in the Northeast Atlantic bottom trawl fishery with a newly developed double steel grid system
Larsen, Roger B.; Herrmann, Bent; Sistiaga, Manu Berrondo; Grimaldo, Eduardo; Tatone, Ivan; Brinkhof, Jesse (Journal article; Peer reviewed, 2018-05)In recent years, Norwegian fishermen have reported problems with fish accumulation in front of the mandatory sorting grids (Sort-X, Sort-V, and Flexigrid). These problems are associated with high fish entry rates and low ... -
Size selectivity and catch efficiency of bottom trawl with a double sorting grid and diamond mesh codend in the North-east Atlantic gadoid fishery
Brinkhof, Jesse; Larsen, Roger B.; Herrmann, Bent; Sistiaga, Manu (Journal article; Peer reviewed, 2020-11)This study investigated the size selectivity and catch efficiency in the North-east Atlantic demersal trawl fishery targeting cod (Gadus morhua) and haddock (Melanogrammus aeglefinus). The use of a sorting grid followed ... -
Size selectivity and catch efficiency of diamond-mesh codends in demersal trawl fishery for conger pike (Muraenesox cinereus) of the South China Sea
Yang, Bingzhong; Herrmann, Bent; Yan, Lei; Li, Jie; Wang, Teng (Peer reviewed; Journal article, 2021)Size selectivity and catch efficiency of six diamond-mesh codends with different mesh sizes, 25–54 mm (termed as D25-D54), for conger pike (Muraenesox cinereus) were tested and compared using the covered codend method in ...