Results 151 to 160 of about 3,321 (195)

Trypanosoma cruzi (Chagas, 1909) transmission among captive wild mammals, triatomines and free-living opossums from surrounding areas in the São Paulo Zoological Park, Brazil. [PDF]

PLoS Negl Trop Dis
Ferreira SS, Bueno MG, Nery CVC, Rassi FB, Monticelli C, Chagas CRF, Gonzalez IHL, das Chagas Xavier SC, Lisboa CV, Ramos PL, Roque ALR.   +10 more
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Tool use in wild spider monkeys (Ateles geoffroyi)

Primates, 2009
Tool use has been observed in a variety of primate species, including both New and Old World monkeys. However, such reports mainly address the most prodigious tool users and frequently limit discussions of tool-using behavior to a foraging framework.
Stacy Lindshield, Michelle A Rodrigues
exaly   +3 more sources

Chromosome polymorphism in Ateles geoffroyi (Cebidae; Primates; Mammalia)

Theoretical and Applied Genetics, 1992
The karyotype of Ateles geoffroyi (Cebidae; Primates; Mammalia) was studied using G- and C-banding techniques, and standardized idiograms are proposed. A polymorphism of chromosome 3 due to a pericentric inversion has been identified for the first time. Genetic analysis of this polymorphism showed Mendelian inheritance.
Herzog, S., Herzog, A., Höhn, H., Matern, B., Hecht, W.   +4 more
exaly   +4 more sources

The menstrual cycle of the spider monkey (Ateles geoffroyi)

American Journal of Primatology, 1998
The ovarian cycles of four adult female spider monkeys (Ateles geoffroyi) were followed daily throughout 30 days by means of vaginal swabs and blood samplings. Cytological analyses of the vaginal swabs and radioimmunoassay determination of the daily levels of estradiol-17 beta (E2) and progesterone (P4) wer done in order to classify the kind of ovarian
Ricardo Mondragon-Ceballos
exaly   +3 more sources

Cranial growth and growth dimorphism in Ateles geoffroyi

American Journal of Physical Anthropology, 1993
AbstractWith the exception of the work of Schultz (1960), cranial growth in Ateles is not well documented. This paper describes the results of a detailed quantitative study of cranial ontogeny in male and female Ateles geoffroyi. Using Euclidean Distance Matrix Analysis (EDMA), local areas of form change due to growth within spider monkey crania are ...
B D, Corner, J T, Richtsmeier
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Locomotion and Posture in Ateles geoffroyi and Ateles paniscus

Folia Primatologica, 1978
The locomotor and postural behavior of Ateles geoffroyi and Ateles paniscus was studied in Panama and Surinam. Ateles locomotion can be divided into five patterns on the basis of limb usage: quadrupedal walking and running, suspensory locomotion, climbing, bipedalism and leaping.
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Factors in forgetting in spider monkeys, Ateles geoffroyi.

Journal of Comparative Psychology, 2021
This essay discusses current problems and factors with memory testing in spider monkeys. (PsycInfo Database Record (c) 2021 APA, all rights reserved).
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Association networks in spider monkeys (Ateles geoffroyi)

Behavioral Ecology and Sociobiology, 2009
We use two novel techniques to analyze association patterns in a group of wild spider monkeys (Ateles geoffroyi) studied continuously for 8 years. Permutation tests identified association rates higher or lower than chance expectation, indicating active processes of companionship and avoidance as opposed to passive aggregation.
Gabriel Ramos-Fernández, Denis Boyer, Filippo Aureli, Laura G. Vick   +3 more
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Olfactory Sensitivity for Aliphatic Esters in Spider Monkeys (Ateles geoffroyi).

Behavioral Neuroscience, 2003
Using a conditioning paradigm, the authors investigated the olfactory sensitivity of 3 spider monkeys (Ateles geoffroyi) for a homologous series of aliphatic esters (ethyl acetate to n-octyl acetate) and isomeric forms of some of these substances. With all odorants, the monkeys significantly discriminated concentrations below 1 ppm from the odorless ...
Laura Teresa Hernandez Salazar, Matthias Laska, Ernesto Rodriguez Luna   +2 more
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Gustatory thresholds for food-associated sugars in the spider monkey (Ateles geoffroyi)

American Journal of Primatology, 1996
The purpose of this study was to determine gustatory thresholds for five different food-associated sugars in Ateles geoffroyi. Using a two-bottle test, three adult spider monkeys were found to significantly prefer concentrations as low as 3 mM sucrose, 15 mM fructose, 20 mM glucose, and 10 mM lactose over tap water.
Matthias Láska
exaly   +3 more sources