| Abstract: | The rate of population growth (lambda) is an important demographic parameter used to assess the viability of a population and to develop management and conservation agendas. We examined the use of resighting data to estimate lambda for the snail kite population in Florida from 1997-2000. The analyses consisted of (1) a robust design approach that derives an estimate of lambda from estimates of population size and (2) the Pradel (1996) temporal symmetry (TSM) approach that directly estimates lambda using an open-population capture-recapture model. Besides resighting data, both approaches required information on the number of unmarked individuals that were sighted during the sampling periods. The point estimates of lambda differed between the robust design and TSM approaches, but the 95% confidence intervals overlapped substantially. We believe the differences may be the result of sparse data and do not indicate the inappropriateness of either modelling technique. We focused on the results of the robust design because this approach provided estimates for all study years. Variation among these estimates was smaller than levels of variation among ad hoc estimates based on previously reported index statistics. We recommend that lambda of snail kites be estimated using capture-resighting methods rather than ad hoc counts. |
| Genre: | Book chapter |
| ProdID: | 5211163 |
| Citation Author: | Dreitz, V.J.; Nichols, J.D.; Hines, J.E.; Bennetts, R.E.; Kitchens, W.M.; Deangelis, D.L. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation End Page: | 623 |
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| Citation Language: | English |
| Citation Larger Work Title: | Statistical analysis of data from marked bird populations |
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| Citation Number Of Pages: | 669 |
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| Citation Phsyical Description: | 669 |
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| Citation Public Comments: | EURING 2000 Conference, Point Reyes, California, October 1-7. PDF on file: 5830_Dreitz.pdf |
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| Citation Series: | Journal of Applied Statistics |
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| Citation Search Results Text: | The use of resighting data to estimate the rate of population growth of the snail kite in Florida; 2002; Book chapter; Statistical analysis of data from marked bird populations; Dreitz, V.J.; Nichols, J.D.; Hines, J.E.; Bennetts, R.E.; Kitchens, W.M.; Deangelis, D.L. |
| Citation Start Page: | 609 |
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| Citation Year: | 2002 |
| Type: | citation/reference |
| Text: | The use of resighting data to estimate the rate of population growth of the snail kite in Florida; 2002; Book chapter; Statistical analysis of data from marked bird populations; Dreitz, V.J.; Nichols, J.D.; Hines, J.E.; Bennetts, R.E.; Kitchens, W.M.; Deangelis, D.L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 9 Jun 2009 09:23 -0500 |
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