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Staat handkokkelvisserij op gespannen voet met behoud biodiversiteit in de Waddenzee?

Van Leeuwe, M. A., Folmer, E., Dekinga, A., Kraan, C., Meijer, K. & Piersma, T., 2008, In : De Levende Natuur. 109, 1, p. 15-19 5 p.

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In the Dutch Wadden Sea, granting permits regulates hand-cockle fishery activity. With <20 permits in the ‘90’s hand-cockle fishery was considered a sustainable activity. With increasing activity since the ban of mechanical dredging for cockles in 2005, a conflict with the principles of nature conservation could well have arisen. Both fishermen and birds focus their needs on locations where large sized cockles occur in high densities. During two intensive surveys (> 2500 sampling points on a dispersed 250 m grid) in August-September 2004 and 2006, it was found that densities of > 600 cockles/m2 were restricted to 0.5-2.5% of the total surface area of intertidal flats in the Wadden Sea. In years of low cockle abundance (e.g. 2004), hand-cockle fishery remove the larger part of the food for shorebirds, as well as the part that is responsible for most of the bivalve recruitment. Moreover, the survey showed that especially the richer areas are characterised by a high biodiversity and high biomass of non-target species. With the extension of fishery activities, the disturbance of sediment may have negative consequences for sediment structure and associated macrozoobenthic intertidal fauna. It is recommended that the permit system is properly re-evaluated.
Original languageDutch
Pages (from-to)15-19
Number of pages5
JournalDe Levende Natuur
Volume109
Issue number1
Publication statusPublished - 2008

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