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
Bult, T.P.; Dekker, W. (2007). 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, in: Mees, J. et al. (Ed.) VLIZ Young Scientists' Day, Brugge, Belgium 2 March 2007: book of abstracts. VLIZ Special Publication, 39: pp. 76
In: Mees, J.; Seys, J. (Ed.) (2007). VLIZ Young Scientists' Day, Brugge, Belgium 2 March 2007: book of abstracts. VLIZ Special Publication, 39. Vlaams Instituut voor de Zee (VLIZ): Oostende. IX, 82 pp., more
In: VLIZ Special Publication. Vlaams Instituut voor de Zee (VLIZ): Oostende. ISSN 1377-0950, more
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Document type: Summary
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| Keywords |
Behaviour > Migrations > Spawning migrations > Anadromous migrations
Research > Experimental research
Taxa > Species > Migratory species
Anguilla anguilla (Linnaeus, 1758) [WoRMS]
Marine/Coastal |
| Authors | | Top |
- Bult, T.P., more
- Dekker, W.
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| Abstract |
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. A conventional trap and our new siphon were tested concurrently at two sluice complexes in the Netherlands (Tholen, Nieuwe Statenzijl), in spring 2005. In all but one case, the siphon caught more glass eel than the trap, and more sticklebacks and other species. These results indicate that the natural immigration process can easily be restored, at low costs and low salt intrusion levels. Our siphons were more successful than conventional traps. Follow up studies must focus on optimisation, and the effect of a passage on the hinterland stock. |
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