Behaviour of stocked and naturally recruited European eels during migration
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Published source details
Westerberg H., Sjöberg N., Lagenfelt I., Aarestrup K. & Righton D. (2014) Behaviour of stocked and naturally recruited European eels during migration. Marine Ecology Progress Series, 496, 145-157.
Published source details Westerberg H., Sjöberg N., Lagenfelt I., Aarestrup K. & Righton D. (2014) Behaviour of stocked and naturally recruited European eels during migration. Marine Ecology Progress Series, 496, 145-157.
Actions
This study is summarised as evidence for the following.
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Translocate wild eels to re-establish or boost native populations (‘stocking’ or ‘restocking’) Action Link |
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Translocate wild eels to re-establish or boost native populations (‘stocking’ or ‘restocking’)
A study in 2010–2012 in a fjord in Grundsund, Sweden (Westerberg et al. 2014) found that translocated wild European silver eels Anguilla anguilla followed a similar migration route at a similar speed to naturally occurring eels. There was no significant difference in the migration speed of eels translocated from the UK (19–26 km/day) compared to eels naturally occurring in Sweden that had been translocated from a lake to a site downstream along their migration route (26–27 km/day). Both eel groups migrated along a similar route from the Swedish coast to the Sargasso Sea. Silver eels were captured from two rivers in Sweden: the River Enningdal, where eels were naturally occurring, and the River Ätran, where glass eels had been translocated, mostly from the UK, since 1983. Eels were captured using silver eel or Wolf traps. Eels were surgically tagged, released in the Gullmaren fjord in October 2010, and their migration monitored for two years. Ten translocated and seven naturally occurring eels retained their tags and could be analysed.
(Summarised by: Vanessa Cutts)
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