SEAN sea otter monitoring SOP 19: Detection count data from images (deliverable SO_I) version 1.0
Womble J, Williams PJ, Johnson W, Taylor-Thomas LF, Bower M. 2018. SEAN sea otter monitoring SOP 19: Detection count data from images (deliverable SO_I) version 1.0. NPS SEAN. Juneau, Alaska
After completion of field work for a survey effort and acceptance of the SO_C georeferenced photo deliverable, selected photo pairs are “read” for count of sea otters, times, locations, and covariates using a variation on the processes in SOP 8. Photo pairs are chosen using the accepted SO_D data to identify consecutive photos containing sea otters and the ACDSee application to determine whether the otters are in the overlap zone between pair members. This results in a CSV data file for each aerial survey which, along with others, are zipped into a package. The resulting SO_I is submitted to formal quality control. Once validation is passed and the deliverable is accepted, it is disseminated through repositories. The final product is then used as a basis for calculating the detection probability to inform the population estimation process (see SOP 9).
- Type
- Standard Operating Procedure
- Authors
- Womble, Jamie; Williams, Perry; Johnson, William; Taylor-Thomas, Louise; Bower, Michael
- Date of Issue
- 2018-10-05
- Publisher
- NPS SEAN. Juneau, Alaska
- Units
- GLBA , SEAN
- Keywords
- monitoring, sea otter, sop
- Subjects
- Ecological Framework: Biological Integrity | Focal Species or Communities | Marine Communities , Ecological Framework: Biological Integrity | Focal Species or Communities | Mammals