Acronym CRANNET
Category
Fisheries
Title Optimised codends for an ecologically and economically sustainable brown shrimp fishery in the North Sea Programme Nat. Programme (supported by ESIF)
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-European Coordinator Neudecker Thomas Coordinator email thomas.neudecker@ti.bund.de
Coordinator institution
TI SF - Thünen-Institute of Sea Fisheries (Germany)
Institutions involved
COFAD - Consultants for Fishery, Aquaculture and Regional Development (Germany) ,
JaFiCoN - Hunting and Fishing Consulting Neudecker (Germany) ,
SINTEF-SFH - SINTEF Fisheries and Aquaculture (Norway) ,
TI-OF - Thünen-Institute of Baltic Sea Fisheries (Germany) ,
UHH - University of Hamburg (Germany) ,
Start year 2013 End year 2015 Funding (€) € 2,000,000 Website https://fisaonline.de/en/find-institutions/international-research-institutions/?tx_fisaresearch_internationalresearchinstitutions%5Bp_id%5D=6493&tx_fisaresearch_internationalresearchinstitutions%5Baction%5D=projectDetails&tx_fisaresearch_internationalresearchinstitutions%5Bcontroller%5D=Projects&cHash=66586342afa8dfb58185ec3d0835c2e2 Summary CRANNET deals with selectivity of cod ends in brown shrimp fishery and will improve sustainability and economy of brown shrimp fishery by reducing discards and by-catch.
Goal:
CRANNET will investigate the effect of various cod end types in the shrimp net as there are traditional diamond shaped meshes (T 0), meshes turned by 90° (T 90) and 45°(T 45). Mesh openings (stretched mesh) range from 8 mm (reference cod end), 14 mm, 18 mm, 20 mm ("fishermen standard shrimp cod end"), 22mm, 24 mm, 26 mm, 28 mm, 30 mm, 32 mm to 34 mm maximum. Shrimp catches as well as by-catches of research vessel SOLEA will be analysed by species (taxa) and length frequencies. Shrimp lengths are measured by a newly developed electronic image analysing system in batches of up to 200 shrimp en bloc. The observed length frequency data will be transferred to selection curves. These are basis for a population model able to calculate population effects and changes in catches of brown shrimps as an effect of surviving small shrimp saved by larger mesh sizes. An attempt will be made to also calculate economic effects of changes if the fleet will change to different cod ends. When the decision will by possible which type and size of cod end is "optimal" for reducing discards and maintaining "acceptable" catch rates field test are planned for 2014 to check the scientific results by applying them to commercial shrimp vessels. This seems necessary to convince the fishermen of the positive effects achievable by alternative cod ends in shrimp trawls.
Keywords
Fishing technology;
Environmental impact;
Trawling;
Shellfish;
Discard;
Crustacean fisheries;
Gear selectivity;
Crustacean;
Bycatch;
Shrimp;
Marine Region
6
Central North Sea (27.IVb)
1
Marine Region Map
