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Table 1.

Characteristics of the five coastal water bodies sampled, i.e., Stockholm Archipelago (SWE-ARC), Gudenaa (DEN-GUD), Burrishoole (IRE-BUR), Corrib (IRE-COR), and Frémur (FRA-FRE). Trophic status according to Carlson (1977) [12]. Sampling dates from October 2009 to February 2010 correspond to the same seaward migration of the silver eels whereas sampling in Burrishoole occurred one-year sooner.

Country Sampling site Latitude (N) Longitude (W or E) Number of silver eels Sampling date Salinity (psu) Distance from the sea (km) Trophic status Anthropogenic pressure
Sweden SWE-ARC 58°57′30.82″ 18°02′05.09″ E 10 Oct-2009 5 0 Mesotrophic Low
Denmark DEN-GUD 55°58′01.31″ 09°42′16.64″ E 21 Dec-2009 0 100 Mesotrophic Moderate
Ireland IRE-BUR 53°55′13.51″ 09°35′03.30″ W 49 Nov-2008 0 5.0 Oligotrophic Null
Ireland IRE-COR 53°16′32.05″ 09°03′21.71″ W 26 Nov-2009 0 0.6 Oligotrophic Low
France FRA-FRE 48°34′39.80″ 02°06′13.10″ W 43 Feb-2010 0 4.5 Eutrophic High

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