Topic
Vervet monkey
About: Vervet monkey is a research topic. Over the lifetime, 717 publications have been published within this topic receiving 21385 citations. The topic is also known as: Chlorocebus pygerythrus & Vervet.
Papers published on a yearly basis
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Papers
TL;DR: The observed anatomical distribution of damage, and the cellular features of the damage agree with that observed in instances of GC-induced toxicity in the rodent hippocampus, and of stress-inducedoxicity in the primate hippocampus, suggesting that sustained GC exposure (whether due to stress, Cushings syndrome or exogenous administration) might damage the human hippocampus.
Abstract: In the laboratory rat and guinea pig, glucocorticoids (GCs), the adrenal steroids that are secreted during stress, can damage the hippocampus and exacerbate the hippocampal damage induced by various neurological insults. An open question is whether GCs have similar deleterious effects in the primate hippocampus. In fact, we showed that sustained and fatal stress was associated with preferential hippocampal damage in the vervet monkey; however, it was not possible to determine whether the excessive GC secretion that accompanied such stress was the damaging agent. The present study examines this possibility. Pellets of cortisol (the principal GC of primates) were stereotaxically implanted into hippocampi of 4 vervet monkeys; contralateral hippocampi were implanted with cholesterol pellets as a control. One year later at postmortem, preferential damage occurred in the cortisol-implanted side. In the cholesterol side, mild cell layer irregularity was noted in 2 of 4 cases. By contrast in the cortisol-exposed hippocampi, all cases had at least 2 of the following neuropathologic markers: cell layer irregularity, dendritic atrophy, soma shrinkage and condensation, or nuclear pyknosis. Damage was severe in some cases, and was restricted to the CA3/CA2 cellfield. This anatomical distribution of damage, and the cellular features of the damage agree with that observed in instances of GC-induced toxicity in the rodent hippocampus, and of stress-induced toxicity in the primate hippocampus. These observations suggest that sustained GC exposure (whether due to stress, Cushings syndrome or exogenous administration) might damage the human hippocampus.
1,163 citations
TL;DR: It is concluded that vervet alarm calls function to designate different classes of external danger, and context was not a systematic determinant of response.
1,032 citations
1 Jan 2003
TL;DR: R roaring rates of individual males are highly correlated with their fighting ability and thus provide an accurate indication of the males' ability to repel intruders, and has since become a classic example of "truth in advertising" in an animal vocalization.
Abstract: 1. Introduction When autumn arrives in northern Europe, female red deer (Cervus elaphus L.) begin to congregate. The mating season has begun. They are soon joined by males, who have spent the previous ten months in preparation, feeding and sparring. Some of the males herd females into groups or "harems", which they vigorously defend from other males. A prominent component of this defense is roaring, a powerful, low-pitched groaning sound made only by males, and primarily by harem holders. Why do males produce these sounds, and what effect do they have on listeners? Early observers (Darling 1937) suggested that the roars intimidated rivals, and repelled intruders without the need for a dangerous fight. However, selection should favor opponents who are not so easily intimidated, and who base their behavior solely upon a balanced assessment of their chances of winning a fight and inheriting the herd (Maynard Smith and Price 1973). In a classic paper, Clutton-Brock and Albon (1979) showed that roaring provides a source of information relevant to this decision: roaring rates of individual males are highly correlated with their fighting ability and thus provide an accurate indication of the males' ability to repel intruders. They also demonstrated, in a series of playback experiments, that rival males attend to this information, responding preferentially to high roar rates and ignoring the roars of young, small males. Red deer roaring has since become a classic example of "truth in advertising" in an animal vocalization.
379 citations
Journal Article•
TL;DR: A saline solution for anterior chamber infusion that preserves the outflow resistance of the monkey eye has been described and data are given showing the degree of uncertainty of measurements of outflow facility and intraocular pressure with the two-level constant pressure infusion method.
Abstract: The sources of error and the optivial design of an anterior chamber infusion method for the study of rapid changes in outflow facility and intraocular pressure are discussed, with a series of definite recommendations. A saline solution for anterior chamber infusion that preserves the outflow resistance of the monkey eye has been described. Data are given showing the degree of uncertainty, caused by random factors, of measurements of outflow facility and intraocular pressure with the two-level constant pressure infusion method.
301 citations
TL;DR: Results from a mixed regressive-spatial regressive analysis demonstrate that ranging behavior can indeed be largely interpreted as an adaptive response to perceived risk of predation by some (but not all) predators and the spatial availability of resources.
Abstract: Although ecologists have long recognized that animal space use is primarily determined by the presence of predators and the distribution of resources, the effects of these two environmental conditions have never been quantified simultaneously in a single spatial model. Here, in a novel approach, predator-specific landscapes of fear are constructed on the basis of behavioral responses of a prey species (vervet monkey; Cercopithecus aethiops), and we show how these can be combined with data on resource distribution to account for the observed variation in intensity of space use. Results from a mixed regressive-spatial regressive analysis demonstrate that ranging behavior can indeed be largely interpreted as an adaptive response to perceived risk of predation by some (but not all) predators and the spatial availability of resources. The theoretical framework behind the model is furthermore such that it can easily be extended to incorporate the effects of additional factors potentially shaping animal range use and thus may be of great value to the study of animal spatial ecology.
294 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2025 | 3 |
| 2024 | 13 |
| 2023 | 9 |
| 2022 | 15 |
| 2021 | 24 |
| 2020 | 19 |