Results 181 to 190 of about 2,919 (216)

Vocally mediated reciprocity between neighbouring groups of mantled howling monkeys, Alouatta palliata palliata

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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Postural and Locomotor Behavior of Alouatta palliata on Various Substrates

Folia Primatologica, 1976
A study of the postures and locomotor modes of Alouatta palliata was conducted from mid-June to mid-September 1974 on Barro Colorado Island, Panama Canal Zone. Activities, postures, and locomotor modes were recorded relative to the position of the animals in the trees and to the size and angulatiry of the support structures.
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Rates of fermentative digestion in the howler monkey, Alouatta palliata (primates: Ceboidea)

Comparative Biochemistry and Physiology Part A: Physiology, 1983
1. 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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Grooming in the mantled howler monkey,Alouatta palliata Gray

Primates, 1979
Dominant 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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Life history and locomotion in Cebus capucinus and Alouatta palliata

American Journal of Physical Anthropology, 2009
AbstractAs 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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Energy Metabolism and Food Consumption by Wild Howler Monkeys (Alouatta Palliata)

Ecology, 1979
Rates of CO2 production in free—living and captive howler monkeys were measured using doubly labeled water, and assimilation of energy from natural foods was determined. Results permit construction of a field energy budget, and estimation of the feeding rate of these arboreal, plant—eating primates.
Kenneth A. Nagy, Katharine Milton
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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
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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
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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.
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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.
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