, Volume 282, Issue 1, pp 497–507 | Cite as

Changes in the fish fauna of the Oosterschelde estuary — a ten-year time series of fyke catches

  • O. Hamerlynck
  • K. Hostens
Theme VII: The Higher Trophic Levels


Frequency of occurrence of fish species was monitored on a fortnightly basis in four fykes and a weir in the Oosterschelde estuary from 1979 through 1988. This was done in order to record changes in the fish fauna that may have occurred as a response to the construction of a storm-surge barrier in the mouth of the Oosterschelde (1984–1986) and the concomitant building of compartmentalization dams in the landward part. These compartmentalization dams reduced the freshwater inflow into the system. Principal component analysis using the annual averages in frequency of occurrence suggests a slight shift occurred in the fish community separating a cluster of years 1979–1984 from the cluster 1985–1988. Many of the changes in individual species could be attributed to fluctuations in yearclass strength or were part of changes occurring on a wider geographical scale. The only impact of the construction works seems to be the decrease in a number of anadromous fish. Fish traps seem to be useful as a monitoring tool for a number of species. The value of the data collected could be improved if catch size and length-frequency data are recorded.

Key words

fish community fykes storm surge barrier Oosterschelde estuary 


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  1. Anonymous, 1990. Report of the Roundfish Working Group. ICES CM 1990/Assess: 7 (mimeo).Google Scholar
  2. Aprahamian, M. W. & C. D. Aprahamian, 1990. Status of the genus Alosa in the British Isles; past and present. J. Fish Biol. 37 (Suppl. A): 257–158.Google Scholar
  3. Daan, N., P. J. Bromley, J. R. G. Hislop & N. A. Nielsen, 1990. Ecology of North Sea fish. Neth J. Sea Res. 26: 343–386.Google Scholar
  4. Doornbos, G., 1985. The fish fauna of Lake Grevelingen (SW Netherlands: the role of fish in the food chain of a man-made saline lake some ten years after embankment of a former estuary. Ph. D. Thesis, University of Amsterdam, 169 pp.Google Scholar
  5. Garrod, D. J., 1988. North Atlantic cod: fisheries and management to 1986. In J. A. Gulland (ed.), Fish population dynamics, second edition. John Wiley & Sons, Chichester: 185–218.Google Scholar
  6. Gislason, H, 1989. The influence of variations in recruitment on multispecies yield predictions in the North Sea. ICES CM 1989/MSM: 15 (mimeo).Google Scholar
  7. Hill, M. O., 1979. TWINSPAN a FORTRAN program for arranging multivariate data in an ordered two-way table by classification of individuals and attributes. Cornell University, Ithaca, 90 pp.Google Scholar
  8. Hinz, V., 1989. Monitoring the fish fauna in the Wadden sea with special reference to different fishing methods and effects of wind and light on catches. Helgoländer Meeresunters. 43: 447–459.Google Scholar
  9. Hostens, K. & O. Hamerlynck, 1994. The mobile epifauna of the soft bottoms in the subtidal Oosterschelde estuary: structure, function and impact of the storm-surge barrier; Hydrobiologia 282/283: 479–496.Google Scholar
  10. James, F. C. & C. E. McCulloch, 1990. Multivariate analysis in ecology and systematics: panacea or Pandora's box? Annu. Rev. Ecol. Syst. 21: 129–166.Google Scholar
  11. Jongman, R. H. G., C. J. F. ter Braak & O. F. R. van Tongeren, 1987. Data analysis in community and landscape ecology. Pudoc, Wageningen, 299 pp.Google Scholar
  12. Meijer, A. J., 1989. Monitoring-onderzoek aan de visfauna van de Oosterschelde. Rapportage Resultaten 1988. Bureau Waardenburg bv, Culemborg, 30 pp.Google Scholar
  13. Nédélec, C., 1982. Definition and classification of fishing gear categories. FAO Fish. Techn. Pap. 222: 51 pp.Google Scholar
  14. Nienhuis, P. H. & A. C. Smaal, 1994. The Oosterschelde estuary, a case study of a changing ecosystem: an introduction. Hydrobiologia 282/283: 1–14.Google Scholar
  15. Rijnsdorp, A. D., N. Daan, F. A. van Beek & H. J. L. Heesen, 1991. Reproductive variability in North Sea plaice, sole, and cod. J. Cons. int. Explor. Mer 47: 352–375.Google Scholar
  16. Ruth, M. & R. Berghahn, 1989. Biological monitoring of fish and crustaceans in the Wadden Sea — potential and problems. Helgoländer Meeresunters. 43: 479–487.Google Scholar
  17. Sokal, R. R. & F. J. Rohlf, 1981. Biometry (second edition). W. H. Freeman, San Francisco, 959 pp.Google Scholar
  18. Swaby, S. E. & G. W. Potts, 1990. Rare British marine fishes — identification and conservation. J. Fish Biol. 37 (Suppl. A): 133–143.Google Scholar
  19. Ter Braak, C. J. F., 1987. CANOCO — a FORTRAN program for canonical community ordination by (partial) (detrended) (canonical) correspondence analysis, principal components analysis and redundancy analysis (version 2.1). ITI-TNO, Wageningen, 95 pp.Google Scholar
  20. Ter Braak, C. J. P. & I. C. Prentice, 1988. A theory of gradient analysis. Adv. ecol. Res. 18: 271–317.Google Scholar
  21. Tiews, K., 1990. 35-Jahres-Trend (1954–1988) der Häufigkeit von 25 Fisch- und Krebstierbeständen an der deutschen Nordseeküste. Arch. Fish Wiss. 40: 39–48.Google Scholar
  22. Van der Veer, H. W., J. IJ. Witte, M. A. Beumkes, R. Dapper, W. P. Jongeman & J. van der Meer, 1992. Intertidal fish traps as a tool to study long-term trends in juvenile flatfish. Neth. J. Sea Res. 29: 119–126.Google Scholar
  23. Vea Salvanes, A. G., 1986. Preliminary report from a comparative study of four gadoid fishes in a fjord of western Sweden. ICES C.M. 1986/G:71 (mimeo).Google Scholar
  24. Vroon, J., 1994. Hydrodynamic characteristics of the Oosterschelde in recent decades. Hydrobiologia 282/283: 17–27.Google Scholar
  25. Wheeler, A., 1969. The fishes of the British Isles and north west Europe. MacMillan, London, 613 pp.Google Scholar
  26. Witte, J. IJ., H. W. van der Veer & J. van der Meer, in press. Intertidal fish traps as a tool to study long-term trends in juvenile flatfish. Neth. J. Sea Res.Google Scholar

Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • O. Hamerlynck
    • 1
    • 2
  • K. Hostens
    • 1
    • 2
  1. 1.Marine Biology SectionState University of GhentGentBelgium
  2. 2.Netherlands Institute of Ecology — Centre for Estuarine and Coastal EcologyYersekeThe Netherlands

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