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2018_Iller: 2D tracking at a fish ladder outlet in the Iller river near the hydropower dam of Altusried (Germany), 2018.
Pauwels, I.S., Baeyens, R., De Maerteleire,N., Pieters, S., Vergeynst, J., Epple, T., Lechner, T., Naumann, J., Schneider, M., Coeck, J.2018. Precise movements of grayling and barbel near a fish ladder by-passing the hydropower plant of Altusried on the river Iller (Germany). https://marineinfo.org/id/dataset/6046
Contact: Pauwels, Ine

Availability: Unrestricted after moratorium period
Data are initially restricted, but the access condition relaxes to academic or unrestricted once a specified period of time after an event (such as collection, publication, completion of QC procedures or project cessation) has elapsed

In this study we customize a modelling tool to enhance the efficiency of fish passes by assessing and modelling the attraction flow and upstream fish migration more

Despite technical innovations in hydropower being limited, the potential for hydropower development in the EU maintains a prominent position amongst renewables. However, it affects the essential characteristics of aquatic habitats supporting fishes’ biological functions, such as reproduction by blocking or delaying fish spawning migration. Hence, hydropower industry address fish migration issues by fish passage facilities, among others. To ensure great effectiveness of these measures, ecological knowledge and decision support tools are essential. In this study we customize a modelling tool to enhance the efficiency of fish passes by assessing and modelling the attraction flow and upstream fish migration. Specifically, the agent-based model is developed based on detailed fish tracks observed in the turbulent outflow area around 200 m downstream of a fish ladder bypassing one of 5 hydropower plants on the river Iller. The 2-dimensional fish tracks were collected using the VEMCO positioning system with HR2 180 kHz receivers and fish tags transmitting an unique acoustic signal every second. Beside detailed fish movements in the head stream, fish presence and the catch efficiency of the temporary catch construction in the fish ladder was assessed. Specifically, movements of 25 grayling (Thymallus thymallus) and 25 barbel (Barbus barbus) were accurately observed. Tagging of fish caught in the head stream, as well as fish caught in the fish ladder allowed to assess potential effects of learning behaviour on the efficiency of finding the fish ladder entrance. The study is rare in its kind, because high frequency acoustic telemetry allowed positioning tagged fish every 1 to 3 meters in a turbulent area direct downstream of a hydropower plant.

Biology > Fish, Fisheries
Marine/Coastal, Fresh water, Acoustic telemetry, Acoustic Telemetry, Animal ecology, Barbus barbus (Linnaeus, 1758), Pisces, Thymallus thymallus (Linnaeus, 1758)

Temporal coverage
February 2018 - August 2018

Taxonomic coverage
Barbus barbus (Linnaeus, 1758) [WoRMS]
Pisces [WoRMS]
Thymallus thymallus (Linnaeus, 1758) [WoRMS]

Vlaamse overheid; Beleidsdomein Omgeving; Instituut voor Natuur- en Bosonderzoek (INBO), moredata creator
University of Augsburg, moredata creator
IBF Umwelt, moredata creator
SJE Ecohydraulic Engineering GmbH, moredata creator

Related datasets
Parent dataset:
European Tracking Network (ETN) data, more

Dataset status: Completed
Data type: Data
Data origin: Research: field survey
Metadatarecord created: 2018-10-22
Information last updated: 2018-10-22
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