| Abstract: | Laysan ducks (Anas laysanensis) are restricted to approximately 9 km2 in the Northwestern Hawaiian Islands, USA. To evaluate the importance of density dependence for Laysan ducks, we conducted a Bayesian analysis to estimate the parameters of a Gompertz model and the magnitude of process variation and observation error based on the fluctuations in Laysan duck abundance on Laysan Island from 1994 to 2007. This model described a stationary distribution for the population at carrying capacity that fluctuates around a long-term mean of 456 ducks and is between 316 to 636 ducks 95% of the time. This range of expected variability can be used to identify changes in population size that warn of catastrophic events. Density-dependent population dynamics may explain the recovery of Laysan duck from catastrophic declines and allow managers to identify population monitoring thresholds. |
| Genre: | Article |
| ProdID: | 5224958 |
| Citation Author: | Seavy, N.E.; Reynolds, M.H.; Link, W. A.; Hatfield, J.S. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 418 |
| Citation Issue: | 3 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Journal of Wildlife Management |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 5 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | 414-418 |
| Citation Projection: | |
| Citation Public Comments: | 7100_Seavy.pdf |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Postcatastrophe population dynamics and density dependence of an endemic island duck; 2009; Article; Journal; Journal of Wildlife Management; Seavy, N.E.; Reynolds, M.H.; Link, W. A.; Hatfield, J.S. |
| Citation Start Page: | 414 |
| Citation Volume: | 73 |
| Citation Year: | 2009 |
| Type: | citation/reference |
| Text: | Postcatastrophe population dynamics and density dependence of an endemic island duck; 2009; Article; Journal; Journal of Wildlife Management; Seavy, N.E.; Reynolds, M.H.; Link, W. A.; Hatfield, J.S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DOCUMENT): | http://www.bioone.org/doi/abs/10.2193/2007-420 ; http://www.wildlifejournals.org/perlserv/?request=get-abstract&doi=10.2193%2F2007-420 |
| Date Other: | Wed, 16 Jun 2010 12:18 -0500 |
| Publisher: | |
