Table 1. Bioclimatic variables selected to predict Callithrix jacchus suitable area.

Steps in the jackknife procedure to select best contributing bioclimatic variables for Callithrix jacchus spatial distribution in Brazil. Bioclimatic variables from sets 1, 2 and 2 were used for model calibration.

Jackknife step	Bioclimatic variables	Bioclimatic variables removed
I	All except 8, 9, 18, 19	3, 16, 13
II	Set 3: Annual Mean Temperature (1), Mean Diurnal Range (2), Temperature Seasonality (4), Max Temperature of Warmest Month (5), Min Temperature of Coldest Month (6), Temperature Annual Range (7), Mean Temperature of Warmest Quarter (10), Mean Temperature of Coldest Quarter (11), Annual Precipitation (12), Precipitation of Driest Month (14), Precipitation Seasonality (15), Precipitation of Driest Quarter (17)	4, 5, 6, 12
III	Set 2: Annual Mean Temperature (1), Mean Diurnal Range (2), Temperature Annual Range (7), Mean Temperature of Warmest Quarter (10), Mean Temperature of Coldest Quarter (11), Precipitation of Driest Month (14), Precipitation Seasonality (15), Precipitation of Driest Quarter (17)	1, 10, 14
IV	Set 1: Mean Diurnal Range (2), Temperature Annual Range (7), Mean Temperature of Coldest Quarter (11), Precipitation Seasonality (15), Precipitation of Driest Quarter (17)	none