A Re-Evaluation of the Size of the White Shark (Carcharodon carcharias) Population off California, USA (original) (raw)
Figure 1
Relative bias in a closed-population hypergeometric model relative to a simulated dynamic sub-population.
Results are shown for varying proportions of resident and transient individuals in a single simulated sub-population sampled from a fixed location (sensu Fearnbach et al. [60]); each combination of resident/transient is representative of repeated simulation runs showing: (A) Annual bias in a given survey year; (B) cumulative (i.e. discovery curve) bias. Values of 1 indicate equivalence (no bias) between methods; color variation represents proportion of known transients in the population from zero (dark red) to 90% (dark blue). *Assuming residents only from Chapple et al. [22]; **assuming resident/transient proportions from Fearnbach et al. [58].