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Migration of the shore crab, Carcinus maenas, in the Dutch Wadden Sea
Klein Breteler, W.C.M. (1976). Migration of the shore crab, Carcinus maenas, in the Dutch Wadden Sea. Neth. J. Sea Res. 10(3): 338-353
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579, more
Peer reviewed article  

Also published as
  • Klein Breteler, W.C.M. (1976). Migration of the shore crab, Carcinus maenas, in the Dutch Wadden Sea, in: Klein Breteler, W.C.M. Oecologie van de strandkrab Carcinus maenas (L.) in de westelijke Waddenzee: een serie artikelen over de rol van strandkrabben in de voedselketens op het balgzand, met speciale aandacht voor de groei, produktie, migratie en bioënergetica tijdens het eerste levensjaar. : pp. 338-353, more

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    Marine

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  • Klein Breteler, W.C.M.

Abstract
    Several sampling techniques were used to trace possible migration of shore crabs, Carcinus maenas (L.) in the western Wadden Sea. Most of the juvenile crabs inhabit the flats in summer and autumn at low tide. In sandy areas, this also holds for the adult crabs, but in muddy areas all large crabs are found in shallow drainage gullies at low tide. During high tide they probably perform feeding migrations on the flats. The O-group crabs do not grow larger than about 20 mm before their first winter. In the second year a carapace width of up to 50 mm may be reached. Transport of juveniles in gullies by the tides was associated with the passage of clusters of plant material. No evidence for a net transport in either ebb or flood direction was found. Juvenile crabs winter in the tidal and adjacent subtidal area, concentrating on places with some cover like mussel beds with seaweeds. In spring of the next year they probably moult 2 times, and then show up in relatively high densities in the main gullies of the western Wadden Sea. Maximum densities are reached there by October. In winter all adults leave the tidal area. They probably hide subtidally in the bottom since they were hardly found in trawl net catches of the deeper parts of the Wadden Sea and the adjacent North Sea.

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