Balancing predation and egg harvest in a colonial seabird: A simulation model
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Abstract
We developed an individual-based model to study the effects of different regimes of harvesting eggs and natural predation on reproductive success in a colony of the glaucous-winged gull (Larus glaucescens) in Glacier Bay National Park, Alaska. The model incorporates the sequence of egg laying, relaying, and incubation to hatching for individual nests and calculates hatching success, incubation length, and the total number of eggs laid (as a result of re-nesting and relaying) in all nests in the colony. Stochasticity is incorporated in the distribution of nest lay dates, predation rates, and nests attacked during predation and harvest events. We estimated parameter values by fitting the model to data collected at a small colony during 1999 and 2000 using maximum likelihood. We then simulated harvests and analyzed model predictions. Model outputs indicate that harvesting early, and at one time, provides a predictable take of eggs with the least impact to gulls.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Balancing predation and egg harvest in a colonial seabird: A simulation model |
| Series title | Ecological Modelling |
| DOI | 10.1016/j.ecolmodel.2005.11.002 |
| Volume | 195 |
| Issue | 3-4 |
| Year Published | 2006 |
| Language | English |
| Publisher | Elsevier |
| Contributing office(s) | Alaska Science Center |
| Description | 9 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| First page | 318 |
| Last page | 326 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |