Results 161 to 170 of about 3,321 (195)
Some of the next articles are maybe not open access.
Artificial insemination in black-handed spider monkey (Ateles geoffroyi)
Theriogenology, 2007Artificial insemination (AI) was performed in spider monkeys; these primates are vulnerable to extinction and usually do not reproduce spontaneously in captivity. Uterine cycles were followed by daily assessment of vaginal cytology, and corroborated a posteriori by concentrations of 17-beta estradiol and progesterone, measured by radioimmunoassay (RIA),
L, Hernández-López +4 more
openaire +2 more sources
Ateles geoffroyi (Black-handed spider-monkey)
1968The autosomal pair placed in No. 11 position has a characteristic secondary constriction near its centromere.
T. C. Hsu, Kurt Benirschke
openaire +1 more source
Gustatory Responsiveness to food-associated acids in the spider monkey (Ateles geoffroyi)
Primates, 2000The gustatory responsiveness of four adult spider monkeys to five food-associated acids was assessed in two-bottle preference tests of brief duration (3 min). The animals were given the choice between a 30 mM sucrose solution and defined concentrations of citric acid, ascorbic acid, malic acid, acetic acid, or tannic acid dissolved in a 30 mM sucrose ...
Matthias, Laska +3 more
openaire +2 more sources
Positional behavior in Saimiri boliviensis and Ateles geoffroyi
American Journal of Physical Anthropology, 1990AbstractPositional behavior, associated context, and substrate use in Ateles geoffroyi and Saimiri boliviensis were quantified using instantaneous focal animal sampling and a hierarchically organized nomenclature to describe posture and locomotion. This paper then examines behavioral predictions derived from pseudo‐behavioral locomotor classifications,
openaire +2 more sources
Successful acquisition of an olfactory discrimination paradigm by spider monkeys, Ateles geoffroyi
Physiology & Behavior, 2003The present study demonstrates that an operant conditioning paradigm-originally designed for assessing olfactory performance in an Old World primate, the pigtail macaque-can successfully be adapted for use with a New World primate, the spider monkey.
Matthias, Laska +2 more
openaire +2 more sources
Predicted and verified distributions of Ateles geoffroyi and Alouatta palliata in Oaxaca, Mexico
Primates, 2008Primate conservation requires a better knowledge of the distributions and statuses of populations in both large areas of habitat and in areas for which we currently have no information. We focused on spider monkeys (Ateles geoffroyi) and howler monkeys (Alouatta palliata) in the state of Oaxaca, Mexico.
Teresita, Ortiz-Martínez +2 more
openaire +2 more sources
The Unique Kidney of the Spider Monkey (A teles geoffroyi)
Journal of Medical Primatology, 1977Among nonhuman primates, the renal anatomy of the spider monkey (Ateles geoffroyi) is unique, as it is multipyramidal and multipapillary. Renal function parameters (glomerular filtration rate, renal plasma flow, and concentrating ability) are compared to man and other primates.
J R, Goodman, R H, Wolf, J A, Roberts
openaire +2 more sources
Olfactory sensitivity for aliphatic alcohols and aldehydes in spider monkeys (Ateles geoffroyi)
American Journal of Physical Anthropology, 2005Using a conditioning paradigm, the olfactory sensitivity of five spider monkeys for homologous series of aliphatic 1-alcohols (1-propanol to 1-octanol) and n-aldehydes (n-butanal to n-nonanal) was investigated. With the exception of 1-propanol, the animals significantly discriminated concentrations below 1 ppm from the odorless solvent, and in several ...
Matthias, Laska +2 more
openaire +2 more sources
Laterality in The Use of The Prehensile Tail in The Spider Monkey (Ateles geoffroyi)
Cortex, 1998The purpose of this study was to assess the occurrence of lateral biases in the use of the prehensile tail in Ateles geoffroyi. 24 spider monkeys were presented with three food-reaching tasks designed to differ in the precision of motor control needed for successful food retrieval and assessed for lateral preferences in tail use with a minimum of 50 ...
openaire +2 more sources
Female-Directed Aggression in Free-Ranging Ateles geoffroyi
International Journal of Primatology, 2003In a study of the reproductive biology and behavior of black-handed spider monkeys (Ateles geoffroyi) on Barro Colorado Island, Panama, 107 instances of female directed male aggression (male attacks) occurred during >1,000 h of observation. Two hypotheses might explain this behavior.
openaire +1 more source