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Dramatic effect of pop-up satellite tags on eel swimming
Erik Burgerhout1, Ryotaro Manabe, Sebastiaan A Brittijn
1ZF-Screens BV, Niels Bohrweg, CA Leiden, The Netherlands. e.burgerhout@biology.leidenuniv.nl
Die Naturwissenschaften
|May 20, 2011
Summary
Attaching satellite tags significantly increases European eels' swimming costs, explaining why tracking them to the Sargasso Sea spawning grounds has been difficult. This research highlights the challenges of studying eel migration with current tagging technology.
Area of Science:
- * Marine Biology
- * Ichthyology
- * Animal Migration
Background:
- * The European eel's (Anguilla anguilla) spawning migration to the Sargasso Sea remains poorly understood.
- * Previous attempts to track eels using pop-up satellite tags (PSATs) have yielded limited success in identifying spawning locations.
Purpose of the Study:
- * To quantify the energetic cost of carrying a standard satellite tag on European eels.
- * To determine how tag attachment affects eel swimming efficiency across various speeds.
Main Methods:
- * European eels were subjected to swimming trials in a 2-meter swimming tunnel.
- * Swimming performance and energetic costs were measured with and without a small satellite tag attached.
Main Results:
- * A regular small satellite tag more than doubled the energetic cost of swimming for European eels.
- * This increased swimming cost was observed across a range of tested swimming speeds.
Conclusions:
- * The significant energetic burden imposed by satellite tags likely explains the lack of success in previous tracking studies.
- * Future research may need to consider less intrusive methods or tag designs to effectively study European eel migration and spawning behavior.
