Ivan Tatone

Performance of the Nordmøre Grid in Shrimp Trawling and Potential Effects of Guiding Funnel Length and Light Stimulation

AbstractThe introduction of the Nordmore 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 the targeted shrimp. This study estimated the size- and species-selective performance of the Nordmore grid in the configuration most often applied by fishermen and made a preliminary exploration of the effects of reducing the length of the guiding funnel in front of the grid and mounting light-emitting diodes (LEDs) around the escape exit. Experimental fishing trials were conducted in the Barents Sea to assess the size-selective properties of a 19-mm bar spacing Nordmore grid, mandatory in this Norwegian trawl fishery targeting deepwater shrimp Pandalus borealis (also known as northern shrimp), and its potential improvement. Results were obtained for the target species and four bycatch species: redfish Sebastes spp., Haddock Melanogrammus aeglefinus, Atlantic Cod Gadus morhua, and...

Combination of a sorting grid and a square mesh panel to optimize size selection in the North-East Arctic cod (Gadus morhua) and redfish (Sebastes spp.) trawl fisheries

Combination of a sorting grid and a square mesh panel to optimize size selection in the North-East Arctic cod (Gadus morhua) and redfish (Sebastes spp.) trawl fisheries Manu Sistiaga*, Bent Herrmann, Eduardo Grimaldo, Roger B. Larsen, Leonore Olsen, Jesse Brinkhof, and Ivan Tatone SINTEF Ocean, Brattørkaia 17C, N-7010 Trondheim, Norway The Arctic University of Norway UIT, Hansine Hansens veg 18, 9019 Tromsø, Norway SINTEF Nord, Storgata 118, N-9008 Tromsø, Norway *Corresponding author: tel: þ479 166 3499; e-mail: manu.sistiaga@sintef.no.

New approach for modelling size selectivity in shrimp trawl fisheries

New approach for modelling size selectivity in shrimp trawl fisheries Roger B. Larsen*, Bent Herrmann, Manu Sistiaga, Jesse Brinkhof, Ivan Tatone, and Lise Langård The Arctic University of Norway UIT, Hansine Hansens veg 18, 9019 Tromsø, Norway SINTEF Fisheries and Aquaculture, Brattørkaia 17C, N-7010 Trondheim, Norway Norwegian Directorate of Fisheries, Postbox 185 Sentrum, 5804 Bergen, Norway *Corresponding author: tel: þ4777644536; fax: þ4777646020; e-mail: roger.larsen@uit.no These authors equally contributed to this study.

Fishing efficiency of biodegradable PBSAT gillnets and conventional nylon gillnets used in Norwegian cod (Gadus morhua) and saithe (Pollachius virens) fisheries

Fishing efficiency of biodegradable PBSAT gillnets and conventional nylon gillnets used in Norwegian cod (Gadus morhua) and saithe (Pollachius virens) fisheries Eduardo Grimaldo*, Bent Herrmann, Jørgen Vollstad, Biao Su, Heidi Moe Føre, Roger B. Larsen, and Ivan Tatone SINTEF Ocean, Brattørkaia 17C, N-7010 Trondheim, Norway UiT, The Arctic University of Norway, Breivika, N-9037 Tromsø, Norway *Corresponding author: tel: þ 4740624014; e-mail: Eduardo.Grimaldo@sintef.no. The first two authors contributed equally to this work.