Presence/absence data for the three study species in the focal fragments.

<p>Figures originally produced by LGS based on Google Earth images, for illustrative purposes only.</p

Comparison of competing predictive models of species occurrence for <i>Callicebus nigrifrons</i>, <i>Callithrix aurita</i> and <i>Sapajus nigritus</i>, through the Akaike Information Criterion, based on occurrence information in the region of Alfenas—Brazil.

<p>^(a) Difference between the AICc value of a given model and the lower AICc value among all models for a given species.</p><p>^(b) Model weight. Models were ordered following the first species in the table. For the next two species, we indicate the position of the models, from the higher to the lower weight, using superscripts.</p><p>Plausible models are highlighted.</p><p>Comparison of competing predictive models of species occurrence for <i>Callicebus nigrifrons</i>, <i>Callithrix aurita</i> and <i>Sapajus nigritus</i>, through the Akaike Information Criterion, based on occurrence information in the region of Alfenas—Brazil.</p

Focal study area, Alfenas—MG, Brazil.

<p>The Atlantic Forest remnants in the region are highly fragmented, with the vegetation reduced to 4% of the original area. The forest fragments were manually vectorized, scale 1:10,000, followed by visual grading. Figure originally produced by LGS based on Google Earth images, for illustrative purposes only.</p

Characteristics of the 45 focal fragments regarding the study metrics.

<p>MIN—minimum value, AVG—average value, MAX—maximum value. Note that although the fragments are the same for all species, the average and maximum values for isolation and MPI are different among the species. This result occurred because the metrics include values that are ecologically calibrated that are different among the species.</p><p>Characteristics of the 45 focal fragments regarding the study metrics.</p

Representation of the structure of the three main types of matrices (sugarcane plantations, coffee plantations and pastures) found in the region of Alfenas-MG.

<p>The structure of the sample unit (forest remnant) was also represented.</p

Ecological hypotheses associated with the multiple logistic regression models that were tested to explain the occurrence of <i>Callicebus nigrifrons</i>, <i>Callithrix aurita</i> and <i>Sapajus nigritus</i> in forest remnants in a highly fragmented landscape.

<p>^1. Fahrig 2003.</p><p>^2. Harcourt and Doherty 2005.</p><p>^3. Antongiovanni and Metzger 2005.</p><p>^4. Gascon et al 1999.</p><p>^5. Pozo-Montuy and Serio-Silva 2011.</p><p>Ecological hypotheses associated with the multiple logistic regression models that were tested to explain the occurrence of <i>Callicebus nigrifrons</i>, <i>Callithrix aurita</i> and <i>Sapajus nigritus</i> in forest remnants in a highly fragmented landscape.</p

Illustration of the approach for calculating the isolation metric.

<p>Illustration of the approach for calculating the isolation metric.</p

Predicted (according to plausible models that were valid according to the Kappa test) and observed primate presence/absence in the validation region, Poço Fundo—MG, Brazil.

<p>a) <i>Callicebus nigrifrons</i>—Size + visibility model; b) <i>Sapajus nigritus</i>—Size only model; c) <i>S. nigritus</i>—Size + matrix type model. Figures originally produced by LGS based on Google Earth images, for illustrative purposes only.</p

Characteristics of the 20 fragments employed for model validation, regarding the study metrics.

<p>Codes and comments as in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0114025#pone.0114025.t001" target="_blank">Table 1</a>.</p><p>Characteristics of the 20 fragments employed for model validation, regarding the study metrics.</p

Validation of plausible models explaining the occurrence of three Neotropical primate species in the region of Alfenas, Brazil with the Kappa test, comparing prediction of species occurrence with real presence data in 20 fragments in the region of Poço Fundo, Brazil.

<p>Validation of plausible models explaining the occurrence of three Neotropical primate species in the region of Alfenas, Brazil with the Kappa test, comparing prediction of species occurrence with real presence data in 20 fragments in the region of Poço Fundo, Brazil.</p