Prairie Falcon Fecundity Legacy Data Analysis, Initial Power and Sample Size Estimates
LeBuhn G and Connor E. 2007. Prairie Falcon Fecundity Legacy Data Analysis, Initial Power and Sample Size Estimates. Sausalito, CA
We recommend continuing to monitor all 30 territories in an effort to detect trends toward a decline in the fecundity of Prairie Falcons. At this level of sampling, a 15% difference between core and non-core annual decline in fecundity over 10 years ( a cumulative decline of 80% can be detected with no greater risk of failing to detect such a decline (β = 30%, power = 70%) than that of claiming a decline is occurring when there actually is no decline (α =30%). Because the power to detect a change in fecundity is low, we suggest that management action be taken when a decline is combined with either multiple years where there is complete reproductive failure and the failure to establish nests.
- Type
- Unpublished Report
- Authors
- LeBuhn, Gretchen; Connor, Edward
- Date of Issue
- 2007
- Units
- PINN , SFAN
- Keywords
- birds, fecundity, prairie falcon, raptors
- Subjects
- Ecological Framework: Biological Integrity | Focal Species or Communities | Birds