| current status of the habitat and population of the black howler monkey (alouatta pigra) in balancán, tabasco, mexico. | we evaluated the habitat and populations of the black howler monkey (alouatta pigra) in the municipality of balancán, tabasco, southeastern mexico, using a combination of field surveys and remotely sensed data. we identified 21,937 ha of remnant vegetation composed of 1,348 fragments. fragments separated by up to 200 m were grouped into "clusters" of fragments in accordance with the maximum observed open distance crossed by a. pigra. a total of 11% or 84 of the 772 clusters identified through re ... | 2008 | 18850585 |
| effect of ancestry on behavioral variation in two species of howler monkeys (alouatta pigra and a. palliata) and their hybrids. | social differences between primate species may result from both flexible responses to current conditions or fixed differences across taxa, yet we know little about the relative importance of these factors. here, we take advantage of a naturally occurring hybrid zone in tabasco, mexico to characterize the variation in social structure among two endangered howler monkey species, alouatta pigra and a. palliata, and their hybrids. work in pure populations has suggested that a. pigra females maintain ... | 2014 | 24668503 |
| morphological variation of genetically confirmed alouatta pigra × a. palliata hybrids from a natural hybrid zone in tabasco, mexico. | while hybridization has been reported for a large number of primate taxa, there is a general lack of data on hybrid morphology for wild individuals with known genetic ancestry. a confirmed hybrid zone for the closely related neotropical primates alouatta palliata and a. pigra has provided a unique opportunity to study primate hybrid morphological variation. here we used molecular evidence based on mitochondrial, y-chromosome, and autosomal data to assess hybrid ancestry. we conducted univariate ... | 2013 | 23225250 |
| movement and resource use by a group of alouatta pigra in a forest fragment in balancán, méxico. | uncommonly observed behaviors were systematically recorded in a troop (n = 9 individuals) of black howler monkeys (alouatta pigra) inhabiting a small forest fragment (1.7 ha) in leona vicario, balancán, tabasco, mexico. between february 2002 and january 2003 (n = 499 h), we observed behaviors such as ground travel (85 occasions, total = 269 min/10.8% of total locomotion time), ground foraging (eight occasions, total = 50 min/0.84% of total feeding time) and drinking water pooled in tree holes (2 ... | 2007 | 17136475 |
| seroprevalence of trypanosoma cruzi and leishmania mexicana in free-ranging howler monkeys in southeastern mexico. | natural infection of wild mammals by protozoa parasites is quite common in nature. for neotropical primates different infections of parasites that are etiological agent of disease in human have been identified. in particular, infections by trypanosoma cruzi and leishmania sp., have been reported for some new world primate species, but there are no reports of infection with these parasites in any primate species in mexico. a serological study was conducted on two howler monkey species (alouatta p ... | 2013 | 23165742 |