Abstract # 4195 Event # 30:

Scheduled for Thursday, June 21, 2012 04:45 PM-05:00 PM: Session 7 (Camellia ) Oral Presentation


PRESENCE-ABSENCE MODELS TO PREDICT DISTRIBUTION OF MEXICAN HOWLER MONKEYS

F. Vidal-García1 and J. C. Serio-Silva2
1Posgrado del Instituto de Ecología AC, Xalapa, Veraruz, Mexico, 2Red Biología y Conservación de Vertebrados, Instituto de Ecología AC, Xalapa, Veracruz, Mexico
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     Potential distribution models have been used as tools for conservation of endangered species. They provide information about places with enough habitat suitability and then possible presence of species. However, it is necessary to confront the models with field work activities seeking monkey populations in order to evaluate their concordance levels and their predicted power. We have verified the models of potential distribution of howler monkeys (Alouatta palliata and A. pigra) in Tabasco, Mexico. This is an interesting area because both species are distributed there, and only few regions have been reported with sympatric presence. The models have demonstrated significant levels of concordance (A. palliata: K=0.59, Kmin= -0.0988, Kmax= 0.6517, Z=5.5568, p= 0.0000; A. pigra: k=0.626; Kmin= -0.1069, kmax= 0.6275, Z=6.131; p= 0.0000). The sensibility (presence rate predicted correctly) of models had values of 0.781 and 0.928 respectively, while the values of sensitivity (absence predicted correctly) were 0.821 and 0.770 for each species. The results obtained during the field verification process allowed us to develop the presence-absence models of howler monkeys in Southeastern Mexico. Currently, we are verifying by direct observations the presence and absence of howler monkeys in other states of Mexico.