The dataset contains data from glass eel that was captured with drag and lift nets during rising tide. This to study their distribution over the area. A fyke was used to investigate the influence of limited drainage opening during rising tide on elver migration.
To allow anyone to use this dataset, we have released the data to the public domain under a Creative Commons Zero waiver (http://creativecommons.org/publicdomain/zero/1.0/). We would appreciate however, if you read and follow these norms for data use (http://www.inbo.be/en/norms-for-data-use) and provide a link to the original dataset (https://doi.org/10.15468/cynpxv) whenever possible. If you use these data for a scientific paper, please cite the dataset following the applicable citation norms and/or consider us for co-authorship. We are always interested to know how you have used or visualized the data, or to provide more information, so please contact us via the contact information provided in the metadata, email@example.com or https://twitter.com/LifeWatchINBO.
The data in this occurrence resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 1,171 records.
This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.
The table below shows only published versions of the resource that are publicly accessible.
How to cite
Researchers should cite this work as follows:
Mouton A (2022): Glasaalmigratie - Glass eel migration in the river Yser. v11.4. Research Institute for Nature and Forest (INBO). Dataset/Occurrence. https://doi.org/10.15468/cynpxv
Researchers should respect the following rights statement:
The publisher and rights holder of this work is Research Institute for Nature and Forest (INBO). To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction.
This resource has been registered with GBIF, and assigned the following GBIF UUID: 67fa6403-d5c3-401b-b35d-ec70538ea41d. Research Institute for Nature and Forest (INBO) publishes this resource, and is itself registered in GBIF as a data publisher endorsed by Belgian Biodiversity Platform.
Occurrence; Observation; European eel; estuary management; tidal barrier; glass eel; fish migration; Occurrence
The river Yser, Flanders, Belgium. The Yser basin covers an area of 1101 km² and 32 km of the river is located in France and Belgium.The basin is known as an important area for European eel, providing valuable habitats for growth and development (Denayer & Belpaire 1996). The Yser is a river that originates in French Flanders (the north of France), enters the Belgian province of West Flanders and flows into the North Sea at the town of Nieuwpoort. (http://en.wikipedia.org/wiki/Yser)
|South West [50.96, 2.52], North East [51.18, 2.92]
All records in this dataset are European eel (Anguilla anguilla).
|Actinopterygii (ray-finned fishes)
|Anguilla anguilla (European eel)
|Start Date / End Date
|2009-03-30 / 2009-04-10
No Description available
|Raamovereenkomst ecologische advisereing en onderzoek tussen W&Z en het INBO
|Waterwegen en Zeekanaal NV (W&Z) - http://www.wenz.be/en/
|Study Area Description
|European eel Anguilla anguilla (L.) populations have declined dramatically during the last decades and are now among the most critically endangered fish populations in Europe. The limitation of upstream migration of glass eels is considered to be one of the key factors reducing eel populations. The migration of eels in their juvenile stage (glass eels) was studied, and options to improve eel passage at a tidal barrier complex at the mouth of the Yser River, Flanders,Belgium, were assessed. Glass eels were sampled during tidal rise with stow nets and lift nets to analyse their distribution over the study area, while a fyke net was used to evaluate the impact of limited barrier opening on glass eel migration. Support-vector machine-based analysis of the lift net data indicated that migrating glass eels are attracted by the fresh water flow leaking from the barriers, whereas other variables such as the sampling location only had a weak influence on the glass eel density. Limited barrier opening during tidal rise appeared to be a cost-efficient and effective mitigation option to improve upstream glass eel migration without significant intrusion of seawater. Adjusted barrier management could often be implemented and applied on numerous tidal barriers. Therefore the results of this research are of interest to a wide range of river managers and stakeholders and may contribute to the conservation of many eel populations.
The personnel involved in the project:
- Point Of Contact
Glass eel were sampled during tidal rise with stow nets and lift nets to study their distribution over the study area, while a fyke net was used to evaluate the impact of limited barrier opening on glass eel migration.
|Estuary of the river Yser
|"All records are validated."
Method step description:
- one step at a time
- Onderzoek naar glasaalmigratiemogelijkheden in de Ganzepoot (IJzermonding) in Nieuwpoort. Studie in opdracht van W&Z, Afdeling Bovenschelde. Rapporten van het Instituut voor Natuur- en Bosonderzoek 2009 (INBO.R.2009.62). Instituut voor Natuur- en Bosonderzoek, Brussel. http://www.inbo.be/files/bibliotheek/86/187086.pdf
|The presented data may contribute to restoration of eel populations worldwide and be of interest to a wide range of river managers and stakeholders.