Topic
Primate
About: Primate is a research topic. Over the lifetime, 1250 publications have been published within this topic receiving 67388 citations. The topic is also known as: the primate order & primates.
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TL;DR: This study joins several others that indicate that primate vigilance is unresponsive to group size, and new models that take into account association patterns below the level of the group may be needed.
Abstract: In theory, animals are expected to relax vigilance in the safety of large groups. Four controlled studies of primates have failed to detect relaxed vigilance as group size increases. The counter-intuitive behavior of primates might arise if another component of vigilance increases with group size, masking any decrease in outward, anti-predator vigilance. Surveillance of associates is a major component of primate vigilance and might be expected to increase with group size due to an increase in competitive interactions. The present analysis uses data on glances toward associates to determine if within-group surveillance is related to group size in wild red colobus and redtail monkeys of Uganda. Although males glance at associates more frequently during mating periods and females glance at associates more often when infants are young or out of contact, there was no evidence of a group-size effect on within-group surveillance. As with previous studies, primate vigilance patterns reflect reproductive strategies such as infant protection and mate defense. This study joins several others that indicate that primate vigilance is unresponsive to group size. New models that take into account association patterns below the level of the group may be needed.
63 citations
TL;DR: Results indicate that partial recovery of function can occur after extensive destruction of association cortex in the mature primate brain if the damage is distributed over a number of operations.
Abstract: Rhesus monkeys with one-stage or serial ablation of sulcus principalis (prefrontal association cortex) were compared on three spatial tasks. On all tests, the serial monkeys made fewer errors than did the monkeys with onestage lesions. These results indicate that partial recovery of function can occur after extensive destruction of association cortex in the mature primate brain if the damage is distributed over a number of operations.
63 citations
01 Jan 1985
TL;DR: This chapter will review a series of recent studies on the endocrine system of the squirrel monkey, which has some of the highest hormone levels observed so far, and consider several of the important psychological processes that affect endocrine function.
Abstract: In 1968, when the first treatise on the squirrel monkey appeared, it was already apparent that the physiology of New World monkeys differed from that of Old World primates, but few investigators were aware of the extensive differences in hormone metabolism and secretion (Rosenblum and Cooper, 1968). Since that time, it has become increasingly evident that the endocrine system of New World monkeys is extremely divergent from the general primate pattern in terms of both absolute hormone levels and the synthetic pathways utilized. We now know that most of the Callithricidae and smaller Cebidae have unusually high levels of adrenal and gonadal hormones, although typical values are difficult to describe because of the remarkable diversity in their reproductive physiology [for a species comparison, see Hearn (1983)]. In this chapter we will review a series of recent studies on the endocrine system of the squirrel monkey, which has some of the highest hormone levels observed so far. The level and magnitude of the hormone responses in the squirrel monkey have also provided a unique opportunity for assessing the influence of psychological and environmental variables, which may exert less overt effects in species with lower hormone levels. We will discuss the influence of seasonal and diurnal rhythms and the effect of genetic and maturational variables, and finally consider several of the important psychological processes that affect endocrine function.
63 citations
TL;DR: A free-ranging group of patas monkeys was studied at the Caribbean Primate Research Center through parts of a complete seasonal cycle and it was suggested that genealogical relationships were relatively insignificant in their effect on the patterning of intragroup behavior.
Abstract: A free-ranging group of patas monkeys (Erythrocebus patas) was studied at the Caribbean Primate Research Center through parts of a complete seasonal cycle. Analysis of the data reve
63 citations
TL;DR: Primate susceptibility was evaluated and it was found that 100% of intracerebrally inoculated and 92% of orally inoculated squirrel monkeys were susceptible, but cynomolgus macaques were not, suggesting possible low risk for humans.
Abstract: Chronic wasting disease is a prion disease of cervids. Assessment of its zoonotic potential is critical. To evaluate primate susceptibility, we tested monkeys from 2 genera. We found that 100% of intracerebrally inoculated and 92% of orally inoculated squirrel monkeys were susceptible, but cynomolgus macaques were not, suggesting possible low risk for humans.
63 citations