Fig. 1From: Vitality models found useful in modeling tag-failure times in acoustic-tag survival studiesIllustration of Kaplan–Meier (K–M) nonparametric and a fitted parametric survival function and observed deviations in survival values at the time of a failure event. The deviation in survival values is calculated at each time step in the K–M curve used in the GOF assessment (11)Back to article page