Retention of plastic-tipped dart tags in African tigerfish Hydrocynus vittatus

F. J. Jacobs, O. L.F. Weyl, N. S. Libala, G. C. O’Brien, C. T. Downs

Research output: Contribution to journalComment/debatepeer-review


Estimates of tag retention and tagging-related mortality are essential for mark-recapture experiments. Mortality and tag loss were estimated from 15 tigerfish Hydrocynus vittatus marked using Hallmark model PDL plastic-tipped dart tags released into a 1 730 m2 pond at Kamutjonga Inland Fisheries Institute, Namibia, and inspected bi-monthly for the presence or absence of tags. No mortality was observed during the experiment. All marked fish had lost their tags after 10 months and 50% tag loss was estimated at 3.9 months. The high tag loss rate indicates that PDL plastic-tipped dart tags are not suitable for long-term studies on this species.

Original languageEnglish
Pages (from-to)299-301
Number of pages3
JournalAfrican Journal of Aquatic Science
Issue number3
Publication statusPublished - 13 Oct 2017
Externally publishedYes


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