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Changes in abundance of demersal fish species in the North Sea between 1906-1909 and 1990-1995
Rijnsdorp, A.D.; van Leeuwen, P.I.; Daan, N.; Heessen, H.J.L. (1996). Changes in abundance of demersal fish species in the North Sea between 1906-1909 and 1990-1995. ICES J. Mar. Sci./J. Cons. int. Explor. Mer 53: 1054-1062
In: ICES Journal of Marine Science. Academic Press: London. ISSN 1054-3139, more
Peer reviewed article  

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Keywords
    Beam trawlers; Demersal fisheries; Exploitation; Flatfishes; Otter trawlers; ANE, North Sea [Marine Regions]; Marine; Brackish water

Authors  Top 
  • Rijnsdorp, A.D., more
  • van Leeuwen, P.I.
  • Daan, N., more
  • Heessen, H.J.L., more

Abstract
    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.

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