Long-term retention of internal elastomer tags in a wild population of North Pacific giant octopus (Enteroctopus dofleini)

► 1730 Enteroctopus dofleini were tagged with individually identifiable VIE tags and 238 E. dofleini were recaptured (approximately 14%). ► Of the 238 E. dofleini recaptured, 31 were at liberty for 60 days or more. ► Maximum time at liberty was 374 days. ► None of the 238 recaptured E. dofleini show...

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Bibliographic Details
Published in:Fisheries research 2012-12, Vol.134-136, p.17-20
Main Authors: Brewer, Reid S., Norcross, Brenda L.
Format: Article
Language:English
Subjects:
Enteroctopus dofleini
Octopus
Tag and recapture
Tagging
Visible implant elastomer
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Summary:► 1730 Enteroctopus dofleini were tagged with individually identifiable VIE tags and 238 E. dofleini were recaptured (approximately 14%). ► Of the 238 E. dofleini recaptured, 31 were at liberty for 60 days or more. ► Maximum time at liberty was 374 days. ► None of the 238 recaptured E. dofleini showed any signs tag damage as seen using external tags. ► Visible Implant Elastomer tags may be an effective means to monitor cephalopod populations worldwide. Visible Implant Elastomer (VIE) tags represent a viable approach for long-term tracking of North Pacific giant octopus (Enteroctopus dofleini) in Alaska. Over a two year period, 1730 E. dofleini were tagged with individually identifiable VIE tags and 238 E. dofleini were recaptured in a 25km2 area. Of the 238 E. dofleini recaptured, 31 were at liberty for 60 days or more with a maximum time at liberty of 374 days. This study shows that long-term retention of VIE tags may prove to be a vital tool in determining important life-history information for octopus species.
ISSN:0165-7836
1872-6763
DOI:10.1016/j.fishres.2012.07.020