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Long-term changes in ray populations in the North Sea |
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| Authors: | Walker P A; Heessen H J L |
| Institution: | Netherlands Institute for Sea Research (NIOZ) PO Box 59, 1790 AB Den Burg, Texel, The Netherlands Netherlands Institute for Fisheries Research (RIVO) PO Box 68, 1970 AB, IJmuiden, The Netherlands |
| Abstract: | |
| Keywords: | abundance distribution Raja spp |
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