Numbers of larvae and primary plantigrades of the mussel Mytilus edulis in the western Dutch Wadden Sea |
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| Institution: | 1. Nofima, P.O. Box 5010, N-1430 Ås, Norway;2. Department of Animal and Aquaculture Sciences, University of Life Sciences, P.O. Box 5003, N-1430 Ås, Norway;3. Nofima, Muninbakken 9-13, N-9291 Tromsø, Norway;4. Institute of Chemistry of Molecular Recognition—CNR and Institute of Biochemistry and Clinical Biochemistry, Catholic University of Rome, 00168 Rome, Italy;5. Department of Arctic and Marine Biology, UiT The Arctic University of Norway, N-9037 Tromsø, Norway;6. Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Box 7023, S-75007 Uppsala, Sweden;7. Institute of Biochemistry and Clinical Biochemistry, Catholic University of Rome, 00168 Rome, Italy;8. Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biosciences, University of Oslo, P.O. Box 1066 Blindern, N-0316 Oslo, Norway |
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| Abstract: | Abundance of larvae and primary plantigrades in the blue mussel Mytilus edulis L. was studied quantitatively in the western part of the Dutch Wadden Sea. Observations were made in seven years between 1981 and 1996. In general, a first large peak of larvae appeared in May, followed by one or more much smaller peaks until September. For pelagic larvae an approximate life time of four to six weeks was calculated (on average about five weeks). Pelagic larvae appeared to have a relatively higher survival chance at low larval concentrations than at high concentrations. No relation could be demonstrated between time of larval peaks and spring tides. Year-to-year differences in abundance of plantigrades did not predict mussel recruitment success on nearby tidal flats. |
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