Results 161 to 170 of about 3,903 (190)

Seasonal Changes in Male Associative Behavior and Subgrouping of Alouatta palliata on an Island

International Journal of Primatology, 2006
Howler groups are usually spatially cohesive and stable in composition; however, more flexible grouping patterns occur in some social groups. We analyzed the associative and subgrouping patterns of males living in a group with fission-fusion social organization.
Pedro Américo D. Dias, Ernesto Rodríguez Luna   +1 more
openaire   +1 more source

The distributions of howling monkeys (Alouatta pigra and A. palliata) in southeastern Mexico and Central America

Primates, 2007
We compared the distributions of Alouatta palliata and A. pigra in southeastern Mexico and Central America with geographic and ecological features to infer current barriers and ecological preferences. Distribution data were obtained from museum specimen localities, study sites, historic records and field surveys and integrated into digital elevation ...
Amrei, Baumgarten, G Bruce, Williamson
openaire   +2 more sources

Locomotor and postural behavior in Alouatta palliata and Cebus capucinus

American Journal of Primatology, 1992
AbstractPositional behavior of two platyrrhine monkeys, Alouatta palliata and Cebus capucinus, was observed at La Pacifica and Santa Rosa National Park, Costa Rica. Frequency data for locomotion, postures, support diameters, orientation of supports, and use of canopy were recorded on focal males and females.
openaire   +2 more sources

Y-autosome translocation in the howler monkey, Alouatta palliata.

Journal of medical primatology, 1976
Two modal diploid chromosome numbers were encountered in a population sample of howler monkeys, Alouatta palliata. The modal diploid number of males was 53, females: 54. Karyotypes prepared by G-band and C-band techniques identified a Y-auto-some translocation in the males.
T C, Jones, R W, Thorington, A, Miller, L, Morgan   +3 more
openaire   +1 more source

Vocalizations of howler monkeys (Alouatta palliata) in southwestern Panama.

Folia primatologica; international journal of primatology, 1976
This report presents an analysis of the vocal repertoire of howler monkeys (Alouatta palliata) observed during a field study in southwestern Panama. 26 types of vocalizations were identified and described, and sonagrams are presented for 21 of them. The vocal repertoire contained many nondiscrete calls that graded continuously into each other, and all ...
J D, Baldwin, J I, Baldwin
openaire   +1 more source

Foraging Strategy Changes in an Alouatta palliata mexicana Troop Released on an Island

2003
The distribution of primates has been diminishing during the last decades because of fragmentation and disappearance of habitat (Estrada and Coates-Estrada, 1994). As a consequence, the geographic distribution is no longer continuous and is comprised of areas relatively inaccessible to people.
Ernesto Rodríguez-Luna, Laura E. Domínguez-Domínguez, Jorge E. Morales-Mávil, Manuel Martínez-Morales   +3 more
openaire   +1 more source

The Effect of the Location of a Simulated Intruder On Responses To Long-Distance Vocalizations of Mantled Howling Monkeys, Alouatta Palliata Palliata

Behaviour, 1989
Mantled howling monkeys, Alouatta palliata palliata, of Guanacaste, Costa Rica, respond in a site-dependent way to experimental playbacks of choruses of loud vocalizations. Groups of howling monkeys increase their rates of calling and approach simulated vocal intruders located in often-used patches of forest. In contrast, they call less than previously
openaire   +1 more source

Greeting Behaviors in Male Alouatta palliata at La Pacifica, Costa Rica

International Journal of Primatology, 2019
Greeting behaviors are ritualized, nonaggressive interactions that serve as a form of tactile communication between two individuals; however, our understanding of the function of male greetings and how they vary inter- and intraspecifically is limited, particularly in Neotropical species.
openaire   +1 more source

The vocal organ of the Howling monkey (Alouatta palliata)

Journal of Morphology, 1960
G, KELEMEN, J, SADE
openaire   +2 more sources

Urine-rubbing behavior in the mantled howler monkey Alouatta palliata.

Folia primatologica; international journal of primatology, 1975
Mantled howler monkeys (Alouatta palliata) of both sexes and all age classes were observed rubbing urine on the soles of the feet and/or palms of the hands as well as the ventral surface of the tail and, occasionally, the throat. Instances of urine-rubbing were often associated with periods of troop movement or times of social stress.
openaire   +1 more source