E. E. Holmes, L. W. Fritz, A. E. York, and K. Sweeney. 2007. Age-structured modeling reveals long-term declines in the natality of western Steller sea lions. Ecological Applications 17:2214–2232.

Appendix B. Sensitivity of the J/T metric to the haul-out sample.

FIG. B1. The J/T metric using only those haul-outs that were surveyed every year (left panels), using those surveyed regularly in the 1990s (middle panels), and using every photographed haul-out (right panels).