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Female sexual swelling size, timing of ovulation, and male behavior in wild West African chimpanzees
Conspicuous swellings of the perineal skin can be observed in females of many catharrine primate species particularly during the middle stages of the ovarian cycle. The functional significance ofExpand
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Comparative aspects of the metabolism and excretion of cortisol in three individual nonhuman primates.
A radiometabolism study is described to provide the first comparative data on the time course, route, and characteristics of excreted [3H]cortisol metabolites in three nonhuman primates: the commonExpand
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Comparison of different enzymeimmunoassays for assessment of adrenocortical activity in primates based on fecal analysis
Most studies published to date that used fecal glucocorticoid measurements to assess adrenocortical activity in primate (and many nonprimate) species applied a specific cortisol or corticosteroneExpand
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Androgen and glucocorticoid levels reflect seasonally occurring social challenges in male redfronted lemurs (Eulemur fulvus rufus)
Intense reproductive competition and social instability are assumed to increase concentrations of glucocorticoids and androgens in vertebrates, as a means of coping with these challenges. InExpand
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Characterization of urinary and fecal metabolites of testosterone and their measurement for assessing gonadal endocrine function in male nonhuman primates.
The aims of the present study were (i) to provide basic comparative data on the time course, route, and characteristics of excreted [14C]testosterone (T) metabolites in three nonhuman primates: theExpand
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Dominance, aggression and physiological stress in wild male Assamese macaques (Macaca assamensis)
In group-living animals relative rank positions are often associated with differences in glucocorticoid output. During phases of social stability, when dominance positions are clear and unchallenged,Expand
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Responses to social and environmental stress are attenuated by strong male bonds in wild macaques
Significance Male macaques form social bonds similar to human friendships that buffer them against day-to-day stressors. If male primates live in multimale groups they usually fight fiercely overExpand
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Functional significance of behavioral, morphological, and endocrine correlates across the ovarian cycle in semifree ranging female Tonkean macaques
The role of sexual displays in mating strategies and their reliability in indicating the time of ovulation has given rise to multiple explanations in nonhuman primates. In order to discriminate amongExpand
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Non-invasive assessment of adrenocortical function in the male African elephant (Loxodonta africana) and its relation to musth.
Adult male elephants periodically show the phenomenon of musth, a condition associated with increased aggressiveness, restlessness, significant weight reduction and markedly elevated androgen levels.Expand
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Baboon sexual swellings: Information content of size and color
Primate sexual swellings are hormone-dependent sexual signals that play a key role in determining patterns of behavior. They are among the most conspicuous signals exhibited by any mammal, and theirExpand
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