Geest, Harm van der

Goverse, Edo

Kroes, Rob

Loon, Emiel van

Scheephouwer, Martijn

English

ScholarWorks@UMass Amherst

University of Massachusetts AmherstScholarWorks@UMass AmherstInternational Conference on Engineering andEcohydrology for Fish PassageInternational Conference on Engineering andEcohydrology for Fish Passage 2017Jun 20th, 3:10 PM - 3:30 PMFatal attraction of freshwater flows: migration ofglass eel (Anguilla Anguilla L.) from sea to inlandwatersRob KroesUniversity of AmsterdamEmiel van LoonUniversity of AmsterdamHarm van der GeestUniversity of AmsterdamEdo GoverseUniversity of Amsterdam, RAVONMartijn ScheephouwerRAVON, Nijmegen Reptile, Amphibians and Fish Conservation NetherlandsFollow this and additional works at: https://scholarworks.umass.edu/fishpassage_conferenceThis Event is brought to you for free and open access by the Fish Passage Community at UMass Amherst at ScholarWorks@UMass Amherst. It hasbeen accepted for inclusion in International Conference on Engineering and Ecohydrology for Fish Passage by an authorized administrator ofScholarWorks@UMass Amherst. For more information, please contact scholarworks@library.umass.edu.Kroes, Rob; Loon, Emiel van; Geest, Harm van der; Goverse, Edo; and Scheephouwer, Martijn, "Fatal attraction of freshwater flows:migration of glass eel (Anguilla Anguilla L.) from sea to inland waters" (2017). International Conference on Engineering andEcohydrology for Fish Passage. 6.https://scholarworks.umass.edu/fishpassage_conference/2017/June20/6Rob Kroes¹Emiel van Loon¹Harm van der Geest¹Edo Goverse¹˒²Martijn Scheephouwer² Fatal attraction of freshwater flows: migration of glass eel (Anguilla Anguilla L.) from sea to inland waters ¹ University of AmsterdamDepartment of Freshwater andMarine Ecology² RAVON, NijmegenReptile, Amphibians and Fish   Conservation NetherlandsEel riot of Amsterdam (1886)Eel pullingEel migrationRighton et. al (2016)Glass eelsPumping stationFatal attracktion of freshwater flows: How do water pumping stations affect migration of glass eel from sea to inland waters?Study location: North Sea CanalMethods• Square net sampling• 11 pumping stations with usabledischarge data• 2014 – 2015 – 2016 • Early March – Late June• 5 samples in 30 minutes• 2 times a week 1/2h after sunsetResults: Do pumping stations attract glass eel?Results: Focused on a day after last dischargeResults: Do glass eel discriminate for pumping stations with fish passage?0.761.2700.20.40.60.811.21.4pumping stations without passage pumping station with passagemean (N glass eels per sample)Results: Do new fish passages attract glass eel?20142015 20160%20%40%60%80%100%120%Halfweg Overtoom Kadoelen De Waker%  glass eel per location050010001500Halfweg Overtoom Kadoelen De Waker All locationsN glass eel per locationDiscussion• Water temperature?• Time of year?• Chemotaxis?• Square net sampling?• Sample time?• 84h monitoringTake Home Message: Fatal attraction?• Glass eel discriminate for fish passages• Substantial part do swim to wrong places• Periodic freshwater flows do not attract glass eels• Who will invent the Glass Eel Transponder?Thank you!

Fatal attraction of freshwater flows: migration of glass eel (Anguilla Anguilla L.) from sea to inland waters

https://scholarworks.umass.edu/cgi/viewcontent.cgi?article=2140&amp;context=fishpassage_conference

Fatal attraction of freshwater flows: migration of glass eel (Anguilla Anguilla L.) from sea to inland waters

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