SOP 11: Detection Function Estimation (KM_J Creation) version 1.0, SEAN/GLBA Kittlitz's murrelet monitoring program
Hoekman S, Johnson W, Moynahan B, Sergeant C. 2010. SOP 11: Detection Function Estimation (KM_J Creation) version 1.0, SEAN/GLBA Kittlitz's murrelet monitoring program. NPS SEAN. Juneau, Alaska
After certification of the “KM_E: Cumulative observation database”, the current year’s survey data are used to estimate a detection function, which provides estimates of detection probability for murrelet groups relative to their perpendicular distance from the transect center line. This detection function is integral to assessing whether critical assumptions of methods were met and to population estimates. Analyses are conducted using Program DISTANCE. Exploratory analyses identify violations of assumptions and potential remedies and also identify appropriate truncation and binning strategies for data. Statistical criteria and biological considerations are used to select an appropriate structure for the detection function. Estimates of group size for each species class may also be produced in and exported from DISTANCE. The Data Manager produces necessary input files for DISTANCE analyses, imports data to DISTANCE, and imports to KM_J: Detection function the output from DISTANCE analyses. The Project Leader will conduct analyses to estimate a detection function and group sizes and export results from DISTANCE.
- Type
- Standard Operating Procedure
- Authors
- Hoekman, Steven; Johnson, William; Moynahan, Brendan; Sergeant, Christopher
- Date of Issue
- 2010
- Publisher
- NPS SEAN
- Units
- GLBA , SEAN
- Keywords
- Glacier Bay, Kittlitz's murrelet, marbled murrelet, murrelet, sop, standard operating procedure
- Subjects
- Ecological Framework: Biological Integrity | Focal Species or Communities | Birds