An experimental field study on the migratory behaviours of glass eel (Anguilla anguilla) at the interface of fresh and salt waters, with implications to the management and improvement of glass eel migration

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Glass eel Anguilla anguilla (L.) migrate using ocean currents and Selective Tidal Stream Transport. Conventional fish ladders installed at the marine/fresh water interface, however, require the fish to actively swim upstream. We question the efficiency of these fish ladders for glass eel immigration, and propose a simple siphon over migration barriers, restoring the original Selective Tidal Stream Transport.