caa a22 4500 397550421 CHVBK 20180308164748.0 cr unu---uuuuu 161202e199612 xx s 000 0 eng 10.1006/jmsc.1996.0132 doi (NATIONALLICENCE)oxford-10.1006/jmsc.1996.0132 Changes in abundance of demersal fish species in the North Sea between 1906-1909 and 1990-1995 [Elektronische Daten] [Adriaan D. Rijnsdorp, Piet I. van Leeuwen, Niels Daan, Henk J. L. Heessen] A comparison of catch rates of demersal fish during beam trawl and otter trawl surveys carried out in the period 1990-1995 and 1906-1909 indicates lower abundance in recent years for the total assemblage as well as for individual groups. There appear to have been shifts in the community associated with reduced diversity and evenness indices. Length-frequency distributions of roundfish and flatfish show a shift towards smaller-sized fish. © 1996 International council for the Exploration of the Sea Articles nationallicence diversity nationallicence exploitation nationallicence fish assemblage nationallicence North Sea nationallicence Rijnsdorp Adriaan D. Netherlands Institute for Fisheries Research, PO Box 68, 1970 AB IJmuiden, The Netherlands aut van Leeuwen Piet I. Netherlands Institute for Fisheries Research, PO Box 68, 1970 AB IJmuiden, The Netherlands aut Daan Niels Netherlands Institute for Fisheries Research, PO Box 68, 1970 AB IJmuiden, The Netherlands aut Heessen Henk J. L. Netherlands Institute for Fisheries Research, PO Box 68, 1970 AB IJmuiden, The Netherlands aut ICES Journal of Marine Science Oxford University Press 53/6(1996-12), 1054-1062 1054-3139 53:6<1054 1996 53 icesjms https://doi.org/10.1006/jmsc.1996.0132 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1006/jmsc.1996.0132 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rijnsdorp Adriaan D. Netherlands Institute for Fisheries Research, PO Box 68, 1970 AB IJmuiden, The Netherlands aut NATIONALLICENCE 700 1- van Leeuwen Piet I. Netherlands Institute for Fisheries Research, PO Box 68, 1970 AB IJmuiden, The Netherlands aut NATIONALLICENCE 700 1- Daan Niels Netherlands Institute for Fisheries Research, PO Box 68, 1970 AB IJmuiden, The Netherlands aut NATIONALLICENCE 700 1- Heessen Henk J. L. Netherlands Institute for Fisheries Research, PO Box 68, 1970 AB IJmuiden, The Netherlands aut NATIONALLICENCE 773 0- ICES Journal of Marine Science Oxford University Press 53/6(1996-12), 1054-1062 1054-3139 53:6<1054 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