Document of dataset 6332

Dataset record

Type

Dataset

title in English

Silver eel migration in the Warnow catchment

Acronym

2011_Warnow

Abstract in English

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.

License

https://spdx.org/licenses/CC-BY-4.0.html

bibliographicCitation

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