Adjusted barrier management to improve glass eel migration at an estuarine barrier
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Published source details
Mouton A., Stevens M., Van Den Neucker T., Buysse D. & Coeck J. (2011) Adjusted barrier management to improve glass eel migration at an estuarine barrier. Marine Ecology Progress Series, 439, 213-222.
Published source details Mouton A., Stevens M., Van Den Neucker T., Buysse D. & Coeck J. (2011) Adjusted barrier management to improve glass eel migration at an estuarine barrier. Marine Ecology Progress Series, 439, 213-222.
Actions
This study is summarised as evidence for the following.
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Modify operation of dams/barriers Action Link |
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Modify operation of dams/barriers
A site comparison study in 2009 at a river mouth in Nieuwpoort, Belgium (Mouton et al. 2011; same study site as Mouton et al. 2014) reported that a greater number of European glass eels Anguilla anguilla passed upstream through a partially opened tidal barrier compared to a closed tidal barrier. Results are not based on tests of statistical significance. An average of 632 glass eels/sampling event were caught upstream of a partially opened tidal barrier, whereas 3 glass eels/sampling event were caught upstream of a closed tidal barrier. Between March and April 2009, glass eels were caught during 12 sampling events at a partially opened tidal barrier (lifted by 0.1 m) and three sampling events at a closed tidal barrier. The barriers were located across the mouth of the Yser River where it joined an artificial basin, 3 km from the sea. Each sampling event began as the tide was rising and ended at high tide.Eels were captured in fyke nets upstream of each barrier (opening size: 2.0 x 2.1 m, length: 10.5 m, mesh size: 1 mm).
(Summarised by: Vanessa Cutts)
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