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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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Experimental field study on the migratory behaviour of glass eels (Anguilla anguilla) at the interface of fresh and salt water Bult, T.P.; Dekker, W. (2007). Experimental field study on the migratory behaviour of glass eels (Anguilla anguilla) at the interface of fresh and salt water. ICES J. Mar. Sci./J. Cons. int. Explor. Mer 67(7): 1396-1401. http://dx.doi.org/10.1093/icesjms/fsm105 In: ICES Journal of Marine Science. Academic Press: London. ISSN 1054-3139; e-ISSN 1095-9289, meer

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Beschikbaar in	Auteurs
VLIZ: Open access 261871 [ download pdf ]

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Trefwoorden

Behaviour Behaviour > Migrations Motion > Water motion > Water currents > Ocean currents Motion > Water motion > Water currents > Stream flow Optimisation > Optimization Optimization Salt water Techniques > Biological techniques > Techniques > Quantitative techniques > Optimization Tidal current charts Water > Fresh water Anguilla anguilla (Linnaeus, 1758) [WoRMS] ANE, Nederland [Marine Regions] Marien/Kust

Author keywords

fish ladder; glass eel; migration; selective tidal stream transport;siphon

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Auteurs		Top
Bult, T.P., meer Dekker, W.

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Abstract

European eels (Anguilla anguilla) in the glass eel phase migrate using ocean currents and selective tidal stream transport. Conventional fish ladders installed at the interface of marine and fresh water, however, require the fish to swim upstream actively. 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 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 eels than the trap, as well as more sticklebacks and other species. Clearly, the natural immigration process can be restored fairly easily and at low cost and with low intrusion levels of salt. Follow-up studies should focus on optimization, and the effect of a passage on the hinterland stock.

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