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Predation on migrating eels (Anguilla anguilla L.) from the Western Mediterranean

Westerberg, Håkan and Amilhat, E. and Wahlberg, M. and Aarestrup, K. and Faliex, E. and Simon, G. and Tardy, C. and Righton, D. (2021). Predation on migrating eels (Anguilla anguilla L.) from the Western Mediterranean. Journal of Experimental Marine Biology and Ecology. 544 , 151613
[Research article]

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Abstract

Nineteen female silver European eels (Anguilla anguilla L.) were tagged with satellite tags and released in the Gulf of Lion in the Mediterranean during the migration seasons 2013 and 2015. Sixteen tags transmitted data: five in the Atlantic Ocean, and eleven in the Mediterranean. Of those, 50% of migrating eels were consumed by marine mammals in each year, all in the Mediterranean. The diving behaviour recorded by the tags after the eels were consumed indicated that the most likely predators were deep diving toothed whales. Measurements of the acoustic target strength of the tag showed a negligible effect on the detectability by whale biosonar. Overall, the observed predation rate was similar to that reported for eels escaping into the Atlantic. However, unlike eels in the Atlantic, which are most vulnerable to predators in the first week of escapement as they traverse the continental shelf and before they reach the refuge of the deep ocean, eels escaping from the Mediterranean were predated in deep water, months after release, likely as a consequence of their migration within a relatively narrow and deep corridor in the Alboran Sea. This emphasises the challenge of accounting for natural mortality in management plans for the long-term recovery of the European eel.

Authors/Creators:Westerberg, Håkan and Amilhat, E. and Wahlberg, M. and Aarestrup, K. and Faliex, E. and Simon, G. and Tardy, C. and Righton, D.
Title:Predation on migrating eels (Anguilla anguilla L.) from the Western Mediterranean
Series Name/Journal:Journal of Experimental Marine Biology and Ecology
Year of publishing :2021
Volume:544
Article number:151613
Number of Pages:9
Publisher:ELSEVIER
ISSN:0022-0981
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
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
Keywords:Eel migration, Anguilla anguilla, Mediterranean Sea, Predation, Toothed whales
URN:NBN:urn:nbn:se:slu:epsilon-p-113962
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113962
Additional ID:
Type of IDID
DOI10.1016/j.jembe.2021.151613
Web of Science (WoS)000703535600005
ID Code:25664
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:14 Oct 2021 13:25
Metadata Last Modified:14 Oct 2021 13:31

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