Ireland: Impact of ESB dams on salmon and eels

“The ESB’s [Electricity Supply Board’s] trap and transport programme to move juvenile eels around the dams on the River Shannon has been shown to have an efficiency of less than 2%. In mark and recapture experiments carried out at the Parteen ever traps in 2008 and 2009, the recapture rate for juvenile eels released in the river channel below Parteen Regulating weir was less than 2% (see Egan 2011). Indeed, even the recapture rates for eels released immediately beside that trap were still only 8.61 to 15.20% showing the gross inefficiency of the ESB elver traps. This is despite the fact that the ESB should be trapping and transporting at least 60% of eels upstream around this blocked migration pathway to meet the requirements of Council Regulation (EC) No 1100/2007. ”


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