The Stratified Petersen Estimator with A Known Number of Unread Tags
Article first published online: 25 MAY 2004
Volume 55, Issue 4, pages 1014–1021, December 1999
How to Cite
Schwarz, C. J., Andrews, M. and Link, M. R. (1999), The Stratified Petersen Estimator with A Known Number of Unread Tags. Biometrics, 55: 1014–1021. doi: 10.1111/j.0006-341X.1999.01014.x
- Issue published online: 25 MAY 2004
- Article first published online: 25 MAY 2004
- Received June 1998. Revised February 1999. Accepted March 1999.
- Petersen estimator;
- Salmon escapement;
- Salmon spawning
Summary. The Petersen estimator estimator of abundance can be biased when the assumption of homogeneous capture probability or homogeneous recapture probability is violated. Often this heterogeneity is related to the time or place of capture or recapture, and if these can be stratified, the stratified Petersen estimator reduces the bias caused by this heterogeneity. In some experiments, not all the recovered tagged animals can be examined, and only a subsample has its stratum of release and recovery determined. We develop methods for this modified experiment and apply them to estimate the number of salmon returning to spawn in a river in British Columbia, Canada.