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Complete tag loss in capture–recapture studies affects abundance estimates: An elephant seal case study

1. In capture–recapture studies, recycled individuals occur when individuals lose all of their tags and are recaptured as though they were new individuals. Typically, the effect of these recycled individuals is assumed negligible. 2. Through a simulation‐based study of double‐tagging experiments, we...

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Autores principales: Malcolm‐White, Emily, McMahon, Clive R., Cowen, Laura L. E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7069293/
https://www.ncbi.nlm.nih.gov/pubmed/32184988
http://dx.doi.org/10.1002/ece3.6052
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author Malcolm‐White, Emily
McMahon, Clive R.
Cowen, Laura L. E.
author_facet Malcolm‐White, Emily
McMahon, Clive R.
Cowen, Laura L. E.
author_sort Malcolm‐White, Emily
collection PubMed
description 1. In capture–recapture studies, recycled individuals occur when individuals lose all of their tags and are recaptured as though they were new individuals. Typically, the effect of these recycled individuals is assumed negligible. 2. Through a simulation‐based study of double‐tagging experiments, we examined the effect of recycled individuals on parameter estimates in the Jolly–Seber model with tag loss (Cowen & Schwarz, 2006). We validated the simulation framework using long‐term census data of elephant seals. 3. Including recycled individuals did not affect estimates of capture, survival, and tag‐retention probabilities. However, with low tag‐retention rates, high capture rates, and high survival rates, recycled individuals produced overestimates of population size. For the elephant seal case study, we found population size estimates to be between 8% and 53% larger when recycled individuals were ignored. 4. Ignoring the effects of recycled individuals can cause large biases in population size estimates. These results are particularly noticeable in longer studies.
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spelling pubmed-70692932020-03-17 Complete tag loss in capture–recapture studies affects abundance estimates: An elephant seal case study Malcolm‐White, Emily McMahon, Clive R. Cowen, Laura L. E. Ecol Evol Original Research 1. In capture–recapture studies, recycled individuals occur when individuals lose all of their tags and are recaptured as though they were new individuals. Typically, the effect of these recycled individuals is assumed negligible. 2. Through a simulation‐based study of double‐tagging experiments, we examined the effect of recycled individuals on parameter estimates in the Jolly–Seber model with tag loss (Cowen & Schwarz, 2006). We validated the simulation framework using long‐term census data of elephant seals. 3. Including recycled individuals did not affect estimates of capture, survival, and tag‐retention probabilities. However, with low tag‐retention rates, high capture rates, and high survival rates, recycled individuals produced overestimates of population size. For the elephant seal case study, we found population size estimates to be between 8% and 53% larger when recycled individuals were ignored. 4. Ignoring the effects of recycled individuals can cause large biases in population size estimates. These results are particularly noticeable in longer studies. John Wiley and Sons Inc. 2020-01-30 /pmc/articles/PMC7069293/ /pubmed/32184988 http://dx.doi.org/10.1002/ece3.6052 Text en © 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Malcolm‐White, Emily
McMahon, Clive R.
Cowen, Laura L. E.
Complete tag loss in capture–recapture studies affects abundance estimates: An elephant seal case study
title Complete tag loss in capture–recapture studies affects abundance estimates: An elephant seal case study
title_full Complete tag loss in capture–recapture studies affects abundance estimates: An elephant seal case study
title_fullStr Complete tag loss in capture–recapture studies affects abundance estimates: An elephant seal case study
title_full_unstemmed Complete tag loss in capture–recapture studies affects abundance estimates: An elephant seal case study
title_short Complete tag loss in capture–recapture studies affects abundance estimates: An elephant seal case study
title_sort complete tag loss in capture–recapture studies affects abundance estimates: an elephant seal case study
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7069293/
https://www.ncbi.nlm.nih.gov/pubmed/32184988
http://dx.doi.org/10.1002/ece3.6052
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