Results 141 to 150 of about 3,903 (190)
Some of the next articles are maybe not open access.
Adoption of infant howling monkeys (Alouatta palliata)
American Journal of Primatology, 1981AbstractDuring 3 years of continuous field observations on mantled howlers (Alouatta palliata Gray) in Costa Rica we observed five infants without mothers in the main study group. Four of these infants solicited care and two were adopted (one permanently, one temporarily) by lactating females. The other two were carried but not adopted.
Margaret R, Clarke, Kenneth E, Glander
openaire +2 more sources
Blood Groups of the Mantled Howler Monkey (Alouatta palliata)
Journal of Medical Primatology, 1977Fifty-two howler monkeys were tested for their human-type A-B-O blood groups. All were group B, as shown by the presence of B and H in their saliva, and anti-A in serum. The B-like agglutinogen of their red cells is common to all New World monkey species tested, and is of different origin and significance than their true A-B-O blood group.
J W, Froehlich +4 more
openaire +2 more sources
Exploration and play in howler monkeys (Alouatta palliata)
Primates, 1978Exploration and play were observed in eight troops of howler monkeys (Alouatta palliata) containing 56 young and 95 adults. The behavior patterns of seven age classes are described. There was a clear trend for animals to spend less time in nonsocial exploration with increasing age, and for the frequency of social play to follow an inverted “U” pattern,
J. D. Baldwin, J. I. Baldwin
openaire +1 more source
Variations in the mechanical properties of Alouatta palliata molar enamel
American Journal of Physical Anthropology, 2009AbstractTeeth have provided insights into many topics including primate diet, paleobiology, and evolution, due to the fact that they are largely composed of inorganic materials and may remain intact long after an animal is deceased. Previous studies have reported that the mechanical properties, chemistry, and microstructure of human enamel vary with ...
Laura A, Darnell +3 more
openaire +2 more sources
Correlates of hormonal modulation in mantled howler monkey males,Alouatta palliata
American Journal of Biological Anthropology, 2021AbstractObjectivesThe study of hormone modulation may offer important insight into the responses of individuals to environmental challenges. Here we studied C‐peptide, thyroid hormone (T3), glucocorticoid (GC), and testosterone (T) metabolites of mantled howler males to assess: 1) correlations among hormones; 2) individual and temporal variation in ...
Pedro Américo D. Dias +4 more
openaire +2 more sources
Foraging Habits of Alouatta palliata mexicana in Three Forest Fragments
Folia Primatologica, 2007The activity patterns and diet of howler monkeys(Alouatta palliata mexicana)were studied in 3 forest fragments in south-eastern Mexico: Playa Escondida (PLA), Agaltepec Island (AGA) and Arroyo Liza (LIZ). Intersite differences offered the opportunity to investigate the foraging adaptations of howler monkeys in response to population and habitat size ...
Asensio, N +4 more
openaire +2 more sources
Reproductive Energetics of Female Mantled Howlers (Alouatta palliata)
International Journal of Primatology, 2017The energetic costs of reproduction have an important influence on the life histories of female primates. At present, however, the interplay of female reproductive state, food availability, and strategies aimed at maintaining energy balance has been described for only a few species, limiting our ability to understand intra- and interspecific variation ...
Beatriz Cano-Huertes +5 more
openaire +1 more source
Non-visual senses in fruit selection by the mantled howler monkey (Alouatta palliata)
Primates, 2022There is extensive knowledge about the visual system and the implications of the evolution of trichromatic color vision in howler monkeys (genus Alouatta) related to food selection; however, information about the other sensory systems is limited. In this study we assessed the use of touch, sniffing, and taste in fruit evaluation by 20 adult mantled ...
Karem G. Sánchez-Solano +5 more
openaire +2 more sources
Folia Primatologica, 2022
Abstract Increasing levels of anthropogenic modification, degradation, and fragmentation of arboreal mammal habitats substantially influence wildlife movement and behavior. In Costa Rica, there has been a surge in infrastructure development in the past decade.
Inés Azofeifa Rojas, Tremaine Gregory
openaire +1 more source
Abstract Increasing levels of anthropogenic modification, degradation, and fragmentation of arboreal mammal habitats substantially influence wildlife movement and behavior. In Costa Rica, there has been a surge in infrastructure development in the past decade.
Inés Azofeifa Rojas, Tremaine Gregory
openaire +1 more source
Forest Fragmentation Modifies Habitat Quality for Alouatta palliata
International Journal of Primatology, 2006Fragmentation reduces habitat area, increases the number of habitat patches, decreases their size, and increases patch isolation. For arboreal mammals such as howlers (Alouatta palliata), canopy modifications from fragmentation processes could also negatively affect habitat quality.
Víctor Arroyo-Rodríguez +1 more
openaire +1 more source