Sampling occurs in the Dutch coastal zone and in the Dutch estuaries: Wadden Sea and Scheldt Estuary

Fish morphology, age and physiology; Fish taxonomy-related abundance per unit area of the bed; Salinity of the water column; Temperature of the water column; Zoobenthos taxonomy-related counts; Raw temperature and/or salinity instrument output; Fish taxonomy-related counts; Fish biomass in water bodies

Balances and scales; rulers; CTD; beam trawls

The Dutch Demersal Fish Survey (DFS or DYFS) is part of an international inshore survey carried out with shrimp trawls (light beam trawls, 20 mm mesh in cod-end) by the Netherlands, Belgium and Germany. The DFS aims at monitoring young flatfish in their nursery grounds as well as brown shrimp in the North Sea coastal zone; hence, it covers all coastal and estuarine areas of the southern North Sea, Belgium up to Southern Denmark. All species are sorted from the catch, fish and brown shrimp are measured and counted, other species are counted. For species of commercial interest biological information is collected following a stratification. A CTD is attached to the net. The Dutch survey area comprises the coastal zone from the border between the Netherlands and Belgium up to Esbjerg (DK) and also includes the Wadden Sea, the Ems-Dollard estuary and the Wester- and Oosterschelde. The Belgium coast and the German Wadden Sea are sampled by Belgium and Germany, respectively. Three Dutch research vessels (RV Isis, RV Stern and RV Luctor -previously Schollevaar-) are involved in the DFS every year in September and October, for 12 weeks in total. The survey is part of the EU Data Collection Framework and internationally coordinated by the ICES working group on beam trawl surveys (WGBEAM).

Https://www.wur.nl/nl/Onderzoek-Resultaten/Wettelijke-Onderzoekstaken/Centrum-voor-Visserijonderzoek-1/Visserijonafhankelijke-bemonstering/Surveys-in-de-Delta-Waddenzee-en-Noordzeekustzone.htm (2020) Surveys in de Delta, Waddenzee en Noordzeekustzone,

Wageningen Marine Research, IJmuiden
Haringkade 1
IJmuiden

1976 CP
Netherlands