caa a22 4500 397551657 CHVBK 20180308164752.0 cr unu---uuuuu 161202e199612 xx s 000 0 eng 10.1006/jmsc.1996.0135 doi (NATIONALLICENCE)oxford-10.1006/jmsc.1996.0135 Long-term changes in ray populations in the North Sea [Elektronische Daten] [P. A. Walker, H. J. L. Heessen] Three data sets have been analysed: landing statistics (1903-1993), International Bottom Trawl Surveys (1979-1993), and survey data collected in Dutch coastal waters between 1951 and 1994. Landings of rays and skates have decreased by more than half compared with the post-war level. Starry ray has increased in abundance in the central North Sea between 1970 and 1993. Thornback ray virtually disappeared from the Dutch coastal area in 1958. No significant trend has been observed for the other species. © 1996 International council for the Exploration of the Sea Articles nationallicence abundance nationallicence distribution nationallicence Raja spp nationallicence Walker P. A. Netherlands Institute for Sea Research (NIOZ) PO Box 59, 1790 AB Den Burg, Texel, The Netherlands aut Heessen H. J. L. Netherlands Institute for Fisheries Research (RIVO) PO Box 68, 1970 AB, IJmuiden, The Netherlands aut ICES Journal of Marine Science Oxford University Press 53/6(1996-12), 1085-1093 1054-3139 53:6<1085 1996 53 icesjms https://doi.org/10.1006/jmsc.1996.0135 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1006/jmsc.1996.0135 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Walker P. A. Netherlands Institute for Sea Research (NIOZ) PO Box 59, 1790 AB Den Burg, Texel, The Netherlands aut NATIONALLICENCE 700 1- Heessen H. J. L. Netherlands Institute for Fisheries Research (RIVO) PO Box 68, 1970 AB, IJmuiden, The Netherlands aut NATIONALLICENCE 773 0- ICES Journal of Marine Science Oxford University Press 53/6(1996-12), 1085-1093 1054-3139 53:6<1085 1996 53 icesjms Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford