Figure S1. Estimates of detectability over time (ŷ = 0.009x - 16.720; R2=0.131).

Figure S2. Trends in relative density estimates from three different estimation methods: Lincoln-Peterson mark-recapture, minimum number known alive (MKNA), and MKNA corrected by detectability. MKNA/detectability values are reported in the main text, figure 2

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