The development of stocked eels (Anguilla anguilla) in previously eel‐free Austrian Alpine lakes
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Published source details
Essl K., Gassner H., Schabetsberger R., Jagsch A. & Kaiser R. (2016) The development of stocked eels (Anguilla anguilla) in previously eel‐free Austrian Alpine lakes. Ecology of Freshwater Fish, 25, 17-26.
Published source details Essl K., Gassner H., Schabetsberger R., Jagsch A. & Kaiser R. (2016) The development of stocked eels (Anguilla anguilla) in previously eel‐free Austrian Alpine lakes. Ecology of Freshwater Fish, 25, 17-26.
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 1984–2010 in six alpine lakes in Salzkammergut, Austria (Essl et al. 2016) found that translocated wild European eels Anguilla anguilla increased in length and weight, but catch rates declined. During three time periods over 25 years, translocated eels increased in average total length (1984–1989: 45 cm; 1998–1999: 57 cm; 2009–2010: 66 cm) and weight (1984–1989: 178 g; 1998–1999: 353 g; 2009–2010: 548 g). However, over the same time periods, average catch rates of translocated eels declined (1984–1989: 115 eels/h; 1998–1999: 29 eels/h; 2009–2010: 11 eels/h). In 1954–1981, a total of 180,000–2,200,000 glass eels were translocated to each of six previously eel-free lakes (area: 3–46 km2, average depth: 12–90 m). Eels were sampled in each of the six lakes in May–October during 2–3 time periods (1984–1989, 1998–1999, 2009–2010). Electrofishing was carried out by boat along the shore at 1–46 sites/lake for 0.25–6 h/site. Captured eels were weighed and measured.
(Summarised by: Anna Berthinussen)
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