Fig 1.
Distribution of major human settlements, main roads, and protected areas on Bioko Island.
Also shown is Ureca, the only permanent human settlement entirely within a protected area on Bioko.
Table 1.
Parameter estimation for intervention functions.
Table 2.
Summary of the species, total carcass number and biomass (kg) for carcasses entering the Malabo market from Oct. 1997—Sept. 2010.
Fig 2.
Time series plots of the carcass rates (carcasses/market day).
Shown are the (A) total number of carcasses and the number of carcasses captured by shotgun or trap, (B) the number of domestic (island), and (C) the number of primate carcasses. Vertical lines delineate periods. The transition between Pre-ban and Post-ban also coincides with the passing of the October 2007 primate hunting ban.
Fig 3.
Primate carcass rates raw data, fitted, and predicted values.
Values are as estimated in the intervention analysis via ARIMA (2,0,0,)x(1,0,0)12. Significant interventions are numbered at: 1) 2/1998 –political uprising; 2) 3/2002 –bushmeat roundtable; 3) 11/2003 –Law 7/2003; 4) 11/2007 –Decree 72/2007.
Fig 4.
Average change in carcass rate per month (slopes) and 95% confidence intervals for each aggregation, taxon, and period.
Included for analysis were all species originating on Bioko that comprised >0.01% of the total market biomass (arbitrary threshold). Slopes were normalized by the ratio of standard deviations for the entire time series of the respective taxa and total carcasses in order to directly compare the fractional representation of the taxon in the total market carcass rate. No imported species were included for analysis.
Table 3.
Regression of average carcass rates for total, shotgunned, and trapped carcasses with oil prices as a proxy for income in Early, Pre-ban, and Post-ban periods.