| Abstract: | In an attempt to reduce the high extinction risk inherent to small island populations, we translocated wild Laysan teal Anas laysanensis to a portion of its presumed prehistoric range. Most avian translocations lack the strategic post-release monitoring needed to assess early population establishment or failure. Therefore, we monitored the survival and reproduction of all founders, and their first-generation offspring using radio telemetry for 2 years after the first release. Forty-two Laysan teal were sourced directly from the only extant population on Laysan Island and transported 2 days by ship to Midway Atoll. All birds survived the translocation with nutritional and veterinary support, and spent between 4 and 14 days in captivity. Post-release survival of 42 founders was 0.857 (95% CI 0.86-0.99) during 2004-2006 or annualized 0.92 (95% CI 0.83-0.98). Seventeen of 18 founding hens attempted nesting in the first two breeding seasons. Fledgling success was 0.57 (95% CI 0.55-0.60) in 2005 and 0.63 (95% CI 0.62-0.64) in 2006. The effective founding female population (Ne) was 13. We applied these initial demographic rates to model population growth. The nascent population size increased to >100 after only 2 years post-release (?? = 1.73). If this growth rate continues, the size of the Midway population could surpass the source population before 2010. ?? 2008 The Authors. Journal compilation ?? 2008 The Zoological Society of London. |
| Genre: | Article |
| ProdID: | 70032101 |
| Citation Author: | Reynolds, M. H.; Seavy, N. E.; Vekasy, M. S.; Klavitter, J. L.; Laniawe, L. P. |
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| Citation End Page: | 168 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Animal Conservation |
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| Citation Number Of Pages: | 9 |
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| Citation Search Results Text: | Translocation and early post-release demography of endangered Laysan teal; 2008; Article; Journal; Animal Conservation; Reynolds, M. H.; Seavy, N. E.; Vekasy, M. S.; Klavitter, J. L.; Laniawe, L. P. |
| Citation Start Page: | 160 |
| Citation Volume: | 11 |
| Citation Year: | 2008 |
| Type: | citation/reference |
| Text: | Translocation and early post-release demography of endangered Laysan teal; 2008; Article; Journal; Animal Conservation; Reynolds, M. H.; Seavy, N. E.; Vekasy, M. S.; Klavitter, J. L.; Laniawe, L. P. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1111/j.1469-1795.2008.00166.x |
| Date Other: | Tue, 1 Jan 2008 00:00 -0600 |
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