Fig. 7. The number of years of sustained harvesting that can be applied before causing a 50% reduction in mangrove population numbers. The analysis considers only those harvesting levels in Fig. 6 that were considered statistically unsustainable, i.e., both mean λ and 95% CIs are entirely below 1. Using the criteria of sustaining 50% of the population for 50 yr, three harvesting levels that were considered ecologically unsustainable according to the analysis in Fig. 6 might be considered sustainable according to the harvestersí definition.