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Erb WM, Borries C, Lestari NS, Ziegler T. 2012. Demography of simakobu (Simias concolor) and the impact of human disturbance. Am J Primatol 74:580–590.

In the article cited above, the authors reported the results of a multiple regression analysis, which did not account for pseudoreplication at each study site. We therefore used general linear mixed models to assess the influence of hunting and habitat disturbance on demographic variables; study site was treated as a random effect in each analysis. One-tailed tests were used to evaluate each directed prediction with α set at 0.05. These results should replace those reported in Table IV (p. 586).

Table IV. Results of General Linear Mixed Models Comparing Demographic Structure of Mixed-Sex Groups Across Study Sites (Treated as a Random Effect) as a Function of Both Hunting and Habitat Disturbance
 HuntingHabitat DisturbanceFull Model
VariableFPβFPβAdjusted r2
  1. AF = adult female; AM = adult male; Imm = immature.

Log AF/AM8.8100.033‒0.2174.1900.9280.1330.519
N Imm4.0400.074‒0.7552.4460.8840.5240.326
Log Imm/AF0.1110.383‒0.0300.4480.7160.0540.151

In the GLMM, hunting had a significant negative impact on adult sex ratio, while habitat disturbance had no effect (full model accounted for 51.9% of the variance, see revised Table IV). Furthermore, there was a trend for the number of immatures in groups to be negatively influenced by hunting (full model accounted for 32.6% of the variance). For immature-to-adult female ratio, however, there was no significant relationship with hunting or habitat disturbance (full model accounted for 15.0% of the variance).

Results and conclusions are unchanged.

The authors regret this error.