Study

Fate of translocated American eel (Anguilla rostrata) in the lower Ottawa River and passage behavior at a multichannel barrier

  • Published source details Twardek W.M., Stoot L.J., Cooke S.J., Lapointe N.W.R. & Browne D.R. (2021) Fate of translocated American eel (Anguilla rostrata) in the lower Ottawa River and passage behavior at a multichannel barrier. River Research and Applications, 37, 1413-1423.

Actions

This study is summarised as evidence for the following.

Action Category

Capture and transport eels around dams/barriers (‘trap and transport’)

Action Link
Eel Conservation in Inland Habitats
  1. Capture and transport eels around dams/barriers (‘trap and transport’)

    A study in 2015 in a river in Ontario and Quebec, Canada (Twardek et al. 2021) found that after capturing and transporting American eels Anguilla rostrata upstream of a hydropower station, most eels remained upstream, and numbers that returned downstream did not differ significantly between two release locations. After three months, 31 of 40 eels (78%) captured and transported upstream of a hydropower station remained upstream. The other nine eels returned to the river downstream, one within 24 h of release. The number of eels that returned downstream did not differ significantly between those released 60 km (two eels) or 166 km (seven eels) from the capture site. On 15 July 2015, forty juvenile eels (440640 mm long) were captured, tagged and transported upstream of a hydropower station. Half of the eels were released 2 km upstream of the hydropower station (60 km from capture site), and half were released 6 km downstream of a second hydropower station located further along the river (166 km from capture site). Tagged eels were detected by acoustic receiver arrays deployed along a 120-km length of the river for three months after release.

    (Summarised by: Vanessa Cutts)

Output references
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