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2011_Warnow: Silver eel migration in the Warnow catchment
Citation
Frankowski, J., Dorow, M., Juenger, J., Reckordt, M., Schulz, S., Ubl, C., & Winkler, H. (2019). Behaviour, escapement and mortality of female European silver eels within a regulated lowland river draining into the Baltic Sea. Fish Manag Ecol.;26:86–96. https://doi. org/10.1111/fme.12307
Contact: Dorow, Malte

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

Description
Migration patterns of 146 female silver eels on their way through fresh and brackish water stretches of the Warnow River into the Baltic Sea were studied using acoustic telemetry. The majority of eels (77%) regained their expected downstream migration behaviour after a median rehabilitation time of 2 days. Positive rheotactic behaviour was observed for 23% of tagged eels after release, probably influenced by experimental procedures. The observed silver eel escapement rate was 63%. Two migratory groups were classified by significantly different migratory speed, time of residence in brackish waters and biometric silvering characteristics. Although the classification of silvering stages is based on these measures, the proportions of these stages did not reflect the observed differences in migratory behaviour. In the context of a permanent silver eel descent in the freshwater part of the Warnow River, a permanent escapement was likewise occurring into the Baltic Sea.

Scope
Themes:
Biology > Fish, Fisheries
Keywords:
Marine, Brackish water, Acoustic telemetry, Tracking, Pisces

Temporal coverage
1 June 2011 - 12 October 2012
Quasi continuous (< 1 min.)

Taxonomic coverage
Pisces [WoRMS]

Contributors
Deutscher Fischerei-Verband e.V, moredata creator
Mecklenburg-Vorpommern Research Centre for Agriculture and Fisheries, moredata creator

Related datasets
Parent dataset:
ETN data: fish acoustic receiver network, more

Dataset status: Completed
Data type: Data
Data origin: Research: field survey
Metadatarecord created: 2019-10-07
Information last updated: 2020-02-28
All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy