Preliminary observations of tag shedding, tag reporting, tag wounds, and tag biofouling for raggedtooth sharks (Carcharias taurus) tagged off the east coast of South Africa

Dicken, Matthew Laurence; Booth, Anthony J; Smale, Malcolm John

Title: Preliminary observations of tag shedding, tag reporting, tag wounds, and tag biofouling for raggedtooth sharks (Carcharias taurus) tagged off the east coast of South Africa
Creator: Dicken, Matthew Laurence
Creator: Booth, Anthony J
Creator: Smale, Malcolm John
Date Issued: 2006
Date: 2006
Type: text
Type: article
Identifier: http://hdl.handle.net/10962/125774
Identifier: vital:35816
Identifier: https://doi.10.1016/j.icesjms.2006.06.009
Description: Mark-recapture models do not distinguish how ‘‘deaths’’ accrue to marked animals in the population. If animals lose their tags, then recaptures will be fewer than expected and estimates of survival will be underestimated (Arnason and Mills, 1981; McDonald et al., 2003). Similarly, if the non-reporting rate is unknown and assumed to be negligible, as is the case in some tagging studies (e.g. Cliff et al., 1996, for white sharks Carcharodon carcharias), the probability of capture can be underestimated. The effects of both these problems, inherent in cooperative tagging programmes, lead to too few tagged fish being recovered, with a positive bias on the estimation of population size. These effects are most pronounced when capture probability is low and fewer tags are available for recapture (McDonald et al., 2003).
Format: 9 pages
Format: pdf
Language: English
Relation: ICES Journal of Marine Science
Relation: Dicken, M.L., Booth, A.J. and Smale, M.J., 2006. Preliminary observations of tag shedding, tag reporting, tag wounds, and tag biofouling for raggedtooth sharks (Carcharias taurus) tagged off the east coast of South Africa. ICES Journal of Marine Science, 63(9), pp.1640-1648
Relation: ICES Journal of Marine Science volume 63 number 9 1640 1648 2006 1054-3139
Rights: ICES Journal of Marine Science
Rights: Use of this resource is governed by the terms and conditions of the Oxford Academic Journals Open Access Policy Statement (https://academic.oup.com/journals/pages/open_access)

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Booth, Anthony John (Prof)

RU Department of Ichthyology and Fisheries Science

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