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The effect of externally attached archival data loggers on the short-term dispersal behaviour and migration speed of European eel (Anguilla anguilla L.)

Verhelst, Pieterjan and Aarestrup, Kim and Hellstrom, Gustav and Jepsen, Niels and Koed, Anders and Reubens, Jan and Sjöberg, Niklas and Svendsen, Jon Christian and Kristensen, Martin Lykke (2022). The effect of externally attached archival data loggers on the short-term dispersal behaviour and migration speed of European eel (Anguilla anguilla L.). Animal Biotelemetry. 10 :1 , 9
[Research article]

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Abstract

Background Externally attached archival data logging tags are increasingly used to unravel migration routes of fish species at sea. Due to the relatively large size of the tags, their application on seaward migrating anguillid eels often forms a challenge in terms of feasibility and impact on the eel's swimming performance. In this study, we investigated the impact of externally attached pop-up data storage tags (PDSTs) on the departure direction, time spent at the release location and ground speed of European eels (Anguilla anguilla). Results We tagged 66 eels with internal acoustic transmitters of which half of the eels were additionally tagged with externally attached PDSTs. A network of acoustic receivers allowed us to analyse if the dispersal behaviour (i.e. residence time and departure direction) from the release site differed between eels tagged with and without the PDSTs. In addition, we tracked the eels for ca. 83 km in the marine environment and determined their migration speed. The results showed no differences between eels tagged with or without external PDSTs in respect of the external tagging effect on residence time (n = 60), departure direction at the release site (n = 60) or on the migration speed (n = 20). Conclusions We conclude that the impact of the PDSTs is minimal on these metrics for at least the first part of the marine migration. While these field-based findings suggest that anguillid eels may be largely unaffected by the applied PDSTs, we recognize that more research is needed in both the field and the laboratory to study the impact of PDSTs and externally attached tags in general on fish swimming performance and energy expenditure. This can help interpret the results from the field, but also aid developing more hydrodynamic tag shapes or improved attachment methods.

Authors/Creators:Verhelst, Pieterjan and Aarestrup, Kim and Hellstrom, Gustav and Jepsen, Niels and Koed, Anders and Reubens, Jan and Sjöberg, Niklas and Svendsen, Jon Christian and Kristensen, Martin Lykke
Title:The effect of externally attached archival data loggers on the short-term dispersal behaviour and migration speed of European eel (Anguilla anguilla L.)
Series Name/Journal:Animal Biotelemetry
Year of publishing :2022
Volume:10
Number:1
Article number:9
Number of Pages:8
Publisher:SPRINGERNATURE
ISSN:2050-3385
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:Anguilla, Migration, Tagging effect, External tagging, Data logger, Acoustic, Archival, Data storage tags
URN:NBN:urn:nbn:se:slu:epsilon-p-116456
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116456
Additional ID:
Type of IDID
DOI10.1186/s40317-022-00280-4
Web of Science (WoS)000764729800001
ID Code:27433
Deposited By: SLUpub Connector
Deposited On:25 Mar 2022 10:25
Metadata Last Modified:25 Mar 2022 10:31

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