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Table 3 Corresponding water levels and water temperatures on the month of electrofishing

From: 34 years of investigation in the Rhine River at Ludwigshafen, Germany – trends in Rhine fish populations

Date of fishing Water gauge [m] Mannheim Water temperature [°C] Ludwigshafen
Dec 1976 n. d. 5.5
Jun 1977 3.82 17.1
Oct 1977 2.17 14.1
Jun 1978 4.35 16.8
Sep 1978 2.91 17.5
Apr 1979 3.50 9.7
Sep 1979 n. d. 18.5
Mar 1980 n. d. 7.9
Sep 1980 n. d. 17.8
May 1981 n. d. 13.9
Sep 1981 n. d. 18.2
May 1982 3.98 14.0
Sep 1983 2.92 18.5
May 1984 2.19 12.9
Sep 1984 3.10 17.5
Jun 1985 4.20 21.5
Jun 1988 4.12 17.9
Jun 1989 2.13 19.9
Sep 1990 1.67 19.0
May 1993 2.91 17.7
Jul 1994 2.90 23.9
Jul 1995 3.98 22.5
Jul 1997 2.39 19.7
Jul 1998 2.63 21.7
Sep 2000 2.80 19.0
Sep 2002 n. d. 18.6
Oct 2004 n. d. 15.8
Sep 2006 n. d. 20.1
Sep 2010 3.41 18.3
  1. n. d. – no data available.