Acronym NA
Category
Fisheries
Title Utprøving av sorteringsrist med utslippsåpning i reketrål for å beholde bifangst av kreps - Testing of sorting grate with discharge opening in shrimp trawl to retain bycatch of crayfish Programme National Programme
Instrument (FP6)
Contact Type (FP7)
Strand (Interreg)
NA
Theme (FP7)
Activity Area (FP6)
Regional Area (Interreg)
Action (COST)
NA
Specific Programme (FP7)
NA
Funding source National Coordinator Terje Jørgensen Coordinator email terje.joergensen@imr.no
Coordinator institution
IMR - Institute of Marine Research (Norway)
Institutions involved
NA
Start year 2013 End year 2014 Funding (€) € 111,484 Website https://www.fhf.no/prosjekter/prosjektbasen/900862/ Summary The use of sorting grids was made mandatory in the Norwegian trawl fishery for Pandalus in the Skagerrak from 1 January 2013. To retain the bycatch of fish the legislation provides for the use of a collection bag with a 120 mm square mesh selection panel over the grid outlet. With a 19 mm bar spacing in the shrimp grid, only the very small Nephrops are able to pass through the grid and into the codend. The majority slide along the grid and enter into the collection bag where a large fraction escape through the selection panel. This escape represents an economic loss to the fishers of a well paid bycatch species. Comparative fishing trials with a standard shrimp grid and a grid with a 10 cm high slot at the lower end showed that the codend catches of Nephrops more than doubled when the slot was used. At the same time, the slot did not result in a significant increase in the bycatch of fish. When fishing with a standard grid, Nephrops was observed to accumulate in front of the grid. The whole or part of this catch may be lost during hauling during bad weather or when the codend is twisted. Including the Nephrops ahead of the grid in the catch figures reduces the catch gain from using the slot to 40%.
Keywords
Environmental impact;
Crustacean;
Fishing technology;
Shrimp;
Gear selectivity;
Trawling;
Bycatch;
Shellfish;
Crustacean fisheries;
Marine Region
13
Northern North Sea (27.IVa)
14
Skagerrak, Kattegat (27.IIIa)
2
Marine Region Map
