Group Size and Population Density of the Black Howler Monkey (Alouatta pigra) in Muchukux Forest, Quintana Roo, Mexico

1998 ◽  
Vol 69 (5) ◽  
pp. 260-265 ◽  
Author(s):  
Juan Pedro Gonzalez-Kirchner
Keyword(s):  
Population Density ◽  
Group Size ◽  
Alouatta Pigra ◽  
Quintana Roo ◽  
Howler Monkey ◽  
Black Howler Monkey ◽  
Black Howler

Population of the black howler monkey (Alouatta pigra) in a fragmented landscape in Palenque, Chiapas, Mexico

2002 ◽  
Vol 58 (2) ◽  
pp. 45-55 ◽  
Author(s):  
Alejandro Estrada ◽  
Adrián Mendoza ◽  
Lucía Castellanos ◽  
Reyna Pacheco ◽  
Sarie Van Belle ◽  
...  
Keyword(s):  
Alouatta Pigra ◽  
Howler Monkey ◽  
Fragmented Landscape ◽  
Black Howler Monkey ◽  
Black Howler

scholarly journals Anotaciones de la ecología alimentaria de monos aulladores negros en un fragmento con condiciones de hacinamiento (Balancán, Tabasco, México)

2011 ◽  
Vol 16 (2) ◽  
pp. 140 ◽  
Author(s):  
John Aristizábal-Borja ◽  
Gilberto Pozo-Montuy ◽  
Jairo Pérez-Torres ◽  
Juan Serio-Silva
Keyword(s):  
Tree Species ◽  
Alouatta Pigra ◽  
Howler Monkey ◽  
Evergreen Forest ◽  
Feeding Time ◽  
Howler Monkeys ◽  
Fragmented Habitat ◽  
Black Howler Monkey ◽  
Black Howler ◽  
Black Howler Monkeys

<p><strong></strong>We described the feeding behavior of Central-American black howler monkey (<em>Alouatta pigra</em>) in a fragment of less than one hectare of humid evergreen forest surrounded by grassland for livestock use, isolated trees and mango orchards, in the region of Balancán (Tabasco, México). <strong>Objective:</strong> To record the diet and activity of black howler monkeys in crowded conditions during the wettest month in Balancán (Tabasco, México). <strong>Methods:</strong> The behavioral observations (81 h) were made using the focal animal methodology with an <em>A. pigra</em> troop made up of three individuals (1 adult male, 1 adult female and 1 infant). <strong>Results:</strong> Feeding time represented 15.97%, rest 78% and locomotion 4.57% of total time. In the study area we recorded 14 plant species, with 10 being consumed by howler monkeys. 55% of feeding time was devoted to the consumption of fruits, 27% to leaves, 17% to stems, and 1% to sprouts. <em>Spondias mombin</em> was the tree species most consumed, with 61% of the time invested on it. <strong>Conclusion:</strong> Like other studies, we confirmed the frugivore-folivore feeding tendency of the genus <em>Alouatta</em>. We provide information on the black howler monkey flexibility to live and maintain themselves in extreme perturbation conditions, where their habitat is 0.1 ha with few tree species to use, forcing individuals to move around the ground.</p> <p><strong>Key words: </strong><em>Alouatta pigra</em>, diet, pattern of activity, frugivory, fragmented habitat</p><br />

Subordinate Male Black Howler Monkey (Alouatta Pigra) Responses to Loud Calls: Experimental Evidence for the Effects of Intra-group Male Relationships and Age

Behaviour ◽  
2004 ◽  
Vol 141 (6) ◽  
pp. 703-723 ◽  
Author(s):  
Robert Horwich ◽  
Roxie James ◽  
Dawn Kitchen
Keyword(s):  
Group Size ◽  
Census Data ◽  
Group Living ◽  
Alouatta Pigra ◽  
Howler Monkey ◽  
Natural Group ◽  
Subordinate Male ◽  
Black Howler ◽  
Black Howler Monkeys

AbstractWhen assessing a group's overall fighting ability, functional group size (i. e. the number of cooperative members willing to confront opponents) may be more important than actual group size. Despite obvious benefits, group members do not always act in a collective manner. For example, participation by subordinate male black howler monkeys (Alouatta pigra) in natural group-level contests is highly variable. Using playback experiments, we examined whether alpha-subordinate relationships, number of intruders, or age affected subordinate contest participation. Long-term census data were used to estimate the nature and duration of intra-group male associations. Some subordinate males had long-term relationships with the alpha that existed prior to residence in the current group or they were the alpha male's grown sons. Other subordinate males were in more recent associations with the alpha that formed under seemingly antagonistic circumstances (e. g. the deposed alpha or his grown sons). We found that subordinate males in long-term alpha-subordinate associations had stronger howling and approach responses than males in short-term associations. Younger long-term associates had the strongest reactions to simulated intruders, similarly aged shortterm associates rarely responded, and older males in both association categories responded at intermediate levels. We discuss the variable strategies of subordinate male black howlers and suggest that males who were more likely to participate in group-defence might be gaining direct or indirect fitness benefits by group living.

scholarly journals Population status and identification of potential habitats for the conservation of the Endangered black howler monkey Alouatta pigra in northern Chiapas, Mexico

Oryx ◽  
2010 ◽  
Vol 44 (2) ◽  
pp. 293-299 ◽  
Author(s):  
Yadira M. Bonilla-Sánchez ◽  
Juan Carlos Serio-Silva ◽  
Gilberto Pozo-Montuy ◽  
Nora Bynum
Keyword(s):  
Adult Female ◽  
Fragment Size ◽  
Conservation Status ◽  
Alouatta Pigra ◽  
Geographical Information ◽  
Howler Monkey ◽  
Female Ratio ◽  
Remnant Vegetation ◽  
Black Howler Monkey ◽  
Black Howler

AbstractIn the Mexican state of Chiapas the rainforest has been cleared, to make way for crops and extensive cattle ranching, at an annual rate of 12.4% since 2002. The conservation status of the Endangered black howler monkey Alouatta pigra in these fragmented landscapes in north-eastern Chiapas has not previously been examined. We therefore surveyed A. pigra populations in the municipality of Playas de Catazajá during 2004–2006 to obtain population and habitat data for this species in 115 fragments of remnant vegetation. A geographical information system was used to determine the variables (fragment size, and distances to the nearest fragment, human settlement and water body) that could be used to generate an index of habitat potential for A. pigra. We estimated a population of 659 individuals and a mean troop size of 5.0 ± SE 2.3. The adult male : female ratio was 1 : 1.4, the adult female : juvenile ratio 1 : 0.6 and adult female : immature ratio 1 : 0.8. The index of habitat potential indicates that 12% of the fragments have a high conservation potential for A. pigra. This index is a valuable tool for evaluating the conservation status of this species and its habitat, and can be expanded to include additional variables, thus allowing for a more comprehensive assessment.

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