Summary
Substantial numbers of predominantly O+ fish were impinged on the cooling water screens of Harculo, Gelderland, Merwedehaven and Amer power stations. Low numbers were impinged at the two stations located on the river Meuse (Maas and Claus). Two possible reasons for this difference are suggested,viz. a low fish density in the river Meuse and the deep position of the cooling water intakes. In comparison with Bergum power station situated on a lake the impingement rate at the river stations was more than ten times as low.
Most fish were impinged during the summer months when large numbers of juvenile fish are present in the rivers. Dominating species impinged were roach, pikeperch, bream and perch. The abundance of pikeperch in the screensamples, points to a recent increase in the population of pikeperch in the rivers. The growth pattern of O+ pikeperch and O+ roach during summer seemed very similar for power stations located at different rivers. Thirty fish species and four crustacean species were collected, among whichOrconectus limosus was quite abundant at Maas and Claus power stations.
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Hadderingh, R.H., van Aerssen, G.H.F.M., Groeneveld, L. et al. Fish impingement at power stations situated along the rivers Rhine and Meuse in The Netherlands. Hydrobiological Bulletin 17, 129–141 (1983). https://doi.org/10.1007/BF02280822
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DOI: https://doi.org/10.1007/BF02280822