| Abstract: | We identified cases where the Jolly-Seber estimator of population size is biased under tag loss and tag-induced mortality by examining the mathematical arguments and performing computer simulations. We found that, except under certain tag-loss models and high sample sizes, the population size estimators (uncorrected for tag loss) are severely biased high when tag loss or tag-induced mortality occurs. Our findings verify that this misconception about effects of tag loss and tag-induced mortality could have serious consequences for field biologists interested in population size. Reiterating common sense, we encourage those engaged in capture-recapture studies to be careful and humane when handling animals during tagging, to use tags with high retention rates, to double-tag animals when possible, and to strive for the highest capture probabilities possible. |
| Genre: | Article |
| ProdID: | 70025211 |
| Citation Author: | McDonald, T. L.; Amstrup, S. C.; Manly, B. F. J. |
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| Citation End Page: | 822 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Wildlife Society Bulletin |
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| Citation Number Of Pages: | 9 |
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| Citation Search Results Text: | Tag loss can bias Jolly-Seber capture-recapture estimates; 2003; Article; Journal; Wildlife Society Bulletin; McDonald, T. L.; Amstrup, S. C.; Manly, B. F. J. |
| Citation Start Page: | 814 |
| Citation Volume: | 31 |
| Citation Year: | 2003 |
| Type: | citation/reference |
| Text: | Tag loss can bias Jolly-Seber capture-recapture estimates; 2003; Article; Journal; Wildlife Society Bulletin; McDonald, T. L.; Amstrup, S. C.; Manly, B. F. J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 2003 00:00 -0600 |
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