1. Survival, dispersal, and home-range establishment of reintroduced captive-bred puaiohi, Myadestes palmeri
- Author
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Cynthia M. Kuehler, Jherime L. Kellerman, Tom Telfer, Paul Oesterle, A.Tracey Powers, William B. Monahan, Kristin Whitaker, Alan Lieberman, Erik J. Tweed, Jeffrey T. Foster, and Bethany L. Woodworth
- Subjects
Critically endangered ,biology ,Ecology ,Range (biology) ,Home range ,Captive breeding ,Seasonal breeder ,Biological dispersal ,Flock ,Myadestes ,biology.organism_classification ,Ecology, Evolution, Behavior and Systematics ,Nature and Landscape Conservation - Abstract
We monitored the survival, dispersal, and home-range establishment of captive-bred, reintroduced puaiohi Myadestes palmeri , a critically endangered thrush endemic to the island of Kauai. Fourteen captive-bred, juvenile birds were released from hacktowers in January–February 1999 and monitored for 8–10 weeks using radiotelemetry. All 14 birds (100%) survived to 56 days post-release. Two birds (14.3%) dispersed greater than 3 km from release site within 1 day of release. The remaining birds settled within 1 week and established either temporary home-ranges (mean area=7.9±12.0 ha, range 0.4–31.9) or breeding home-ranges (mean area 1.2±0.34 ha, range 0.8–1.6). Temporary home ranges were abandonded by the beginning of the breeding season, and ultimately 6 of the 14 birds (43%) established breeding home ranges in the release area. The high survival rate bodes well for establishing additional populations through captive breeding and release; however, the 57% dispersal rate out of the target area means that several releases of birds may be necessary in order to repopulate a given drainage. Furthermore, observed dispersal and gene flow between the reintroduced and wild populations have important implications for management of the captive flock.
- Published
- 2003
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