Results 131 to 140 of about 492 (165)
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Interactions between Adult Female and Infant Howling Monkeys (Alouatta palliata)
Folia Primatologica, 1973Eight troops containing a total of 151 howler monkeys were studied for 513 h between December 19, 1970, and February 25, 1971. The troops contained 26 mothers with their infants. Mother-infant and other adult female-infant interactions were analyzed for infants from all three age classes.
J D, Baldwin, J I, Baldwin
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Rates of fermentative digestion in the howler monkey, Alouatta palliata (primates: Ceboidea)
Comparative Biochemistry and Physiology Part A: Physiology, 19831. Caecal material of wild howler monkeys was analyzed by gas chromatography for evidence of fermentation activity and rates of production and absorption of volatile fatty acids. 2. Results showed a high rate of production of acetic acid and lesser production of propionic, butyric and isobutyric acids.
K, Milton, R H, McBee
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Visual detection and fruit selection by the mantled howler monkey (Alouatta palliata)
American Journal of Primatology, 2020AbstractHowler monkeys (platyrrhini) have evolved routine trichromatic color vision independently from catarrhines, which presents an opportunity to test hypotheses concerning the adaptive value of distinguishing reddish from greenish hues. A longstanding hypothesis posits that trichromacy aids in the efficient detection of reddish‐ripe fruits, which ...
Karem G. Sánchez‐Solano +4 more
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Dental topography and molar wear in Alouatta palliata from Costa Rica
American Journal of Physical Anthropology, 2004AbstractPaleoprimatologists depend on relationships between form and function of teeth to reconstruct the diets of fossil species. Most of this work has been limited to studies of unworn teeth. A new approach, dental topographic analysis, allows the characterization and comparison of worn primate teeth.
Dennis, John C +3 more
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Grooming in the mantled howler monkey,Alouatta palliata Gray
Primates, 1979Dominant individuals groom subordinates in the mantled howler monkey. This relationship is previously unreported for the species and is a characteristic that howler monkeys share with many birds and mammals.
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Animal Behaviour, 1987
Abstract The hypothesis that acoustic communication mediates spacing between groups of mantled howling monkeys, Alouatta palliata palliata, was tested experimentally in a Costa Rican forest. Previous work showed that reverberation increases with the distance sound propagates within the forest and thus could provide distance cues to monkeys.
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Abstract The hypothesis that acoustic communication mediates spacing between groups of mantled howling monkeys, Alouatta palliata palliata, was tested experimentally in a Costa Rican forest. Previous work showed that reverberation increases with the distance sound propagates within the forest and thus could provide distance cues to monkeys.
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Life history and locomotion in Cebus capucinus and Alouatta palliata
American Journal of Physical Anthropology, 2009AbstractAs an individual matures from birth to adulthood, many factors may influence the positional repertoire. The biological and behavioral changes that accompany a growing individual are expected to influence foraging strategy, social status and interaction, diet, predator avoidance strategies, and ultimately positional behavior as a behavioral link
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American Journal of Primatology, 2007
AbstractStudies of social affiliation and social spacing offer important insight into the dynamics of subgroup formation and social strategies in living primates. Among the 11 species in the genusAlouatta, mantled howlers (A. palliata) are the only species to consistently form large, stable social groups composed of several adult males and several ...
Bezanson, M. +3 more
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AbstractStudies of social affiliation and social spacing offer important insight into the dynamics of subgroup formation and social strategies in living primates. Among the 11 species in the genusAlouatta, mantled howlers (A. palliata) are the only species to consistently form large, stable social groups composed of several adult males and several ...
Bezanson, M. +3 more
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Locomotor and postural behavior in Alouatta palliata and Cebus capucinus
American Journal of Primatology, 1992AbstractPositional 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.
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Seasonal Changes in Male Associative Behavior and Subgrouping of Alouatta palliata on an Island
International Journal of Primatology, 2006Howler 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 +1 more
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