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| Author |
Brennan, J.; Anderson, J. |
| Title |
Varying responses to feeding competition in a group of rhesus monkeys (Macaca mulatta) |
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Journal Article |
| Year |
1988 |
Publication |
Primates |
Abbreviated Journal |
Primates |
| Volume |
29 |
Issue |
3 |
Pages |
353-360 |
| Keywords |
Macaca mulatta – Dominance – Feeding – Agonistic behaviour – Snakes |
| Abstract |
The behaviour of members of a group of rhesus monkeys was observed in experimentally created, competitive feeding situations. Socially dominant members of the group tended to start eating before lower-ranking subjects, and generally ate more. Dominants sometimes used aggression to control access to food, but overall, intermediate-ranking monkeys were involved in most agonistic episodes. Non-dominant subjects improved their feeding performance when food was presented in three piles rather than one pile, often by snatching food and consuming it away from the pile. These general patterns were less evident when realistic snake models were placed on some of the food piles. Feeding was disrupted by the presence of snakes, but notably, subordinates risked feeding in these conditions. Piles containing preferred foods and snakes were eaten from, but a low-preference food (carrot) under snakes went untouched by all subjects. The results suggest that group-members evaluate potential risks and benefits of competing for a restricted resource, and that dominance status, while an important factor, is only one element in the equation. |
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refbase @ user @ |
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809 |
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| Author |
Visalberghi E; Trinca L |
| Title |
Tool use in capuchin monkeys: distinguishing between performing and understanding |
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Journal Article |
| Year |
1989 |
Publication |
Primates |
Abbreviated Journal |
Primates |
| Volume |
30 |
Issue |
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Pages |
511 |
| Keywords |
Tool use – Cebus apella – Mental representation |
| Abstract |
A horizontal plexiglas tube containing a food-reward was presented to four naive tufted capuchins and suitable sticks were provided to push the reward out. Three monkeys out of four spontaneously used the tools and showed very different styles of solving the task. In more complex conditions, in which the sticks needed to be combined or actively modified in order to become effective, the monkeys were always successful; however, their performance was loaded with errors which did not disappear throughout the trials. Evidence of a difference between success in solving the problem and its understanding was found. This suggests that although capuchins can discover new means through active experimentation, they do not mentally represent the characteristics necessary for a tool to be effective, nor do they modify the tool appropriately beforehand. At this level, a major difference with chimpanzees emerges. |
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Equine Behaviour @ team @ |
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3047 |
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| Author |
Bunnell, B.; Perkins, M. |
| Title |
Performance correlates of social behavior and organization: Social rank and complex problem solving in crab-eating macaques (M. fascicularis) |
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Journal Article |
| Year |
1980 |
Publication |
Primates |
Abbreviated Journal |
Primates |
| Volume |
21 |
Issue |
4 |
Pages |
515-523 |
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Abstract Seventeen male crab-eating macaques, drawn from two captive troops, were tested on a series of complex problem solving tasks in a Wisconsin General Test Apparatus (wgta). The animals were trained on a series of 6-trial object quality learning set problems followed by a series of 10-trial object quality learning set problems. They were then given problems in which the correct stimulus object was reversed part way through the problem. After the animals reached criterion on this task, the reversal learning set was then extinguished. High ranking animals made more intraproblem errors than low ranking animals on the 6-trial problems, but there was no relationship between social status and the rapidity with which the object quality learning set was established. Animals that received overtraining on the 6-trial problems transferred their learning virtually intact to the 10-trial problems; however, high ranking animals without overtraining made more errors than low ranking animals. On reversal learning and reversal extinction, high ranking animals made more errors on critical trials, indicating that they formed and extinguished the reversal set more slowly than low ranking animals. Object quality sets, as measured by trial-2 performance, were not affected by the reversal conditions. |
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2082 |
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| Author |
Neville, M.K. |
| Title |
Male leadership change in a free-ranging troop of Indian rhesus monkeys (Macaca mulatta) |
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Journal Article |
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1968 |
Publication |
Primates |
Abbreviated Journal |
Primates |
| Volume |
9 |
Issue |
1 |
Pages |
13-27 |
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The male leadership of a troop of rhesus living at the foot of the Kumaon foothills of India was studied from January to December of 1965. The troop, inhabiting a region of fields and forests, varied in size from a maximum of 20 after the birth season to a minimum of 14 in December during the breeding season. The troop initially contained two adult males with the occasional presence of a third, more peripheral male. This third male disappeared in March and was perhaps identical with the male who began to appear in August and succeeded in displacing the dominant male from the troop. The second initial male succeeded to the dominant position in September. During the breeding season various extra-troop males followed and occasionally penetrated the troop. The second male had difficulty in maintaining his position against one of these, who had perhaps been the peripheral male at the beginning of 1965. |
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2059 |
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| Author |
Southwick, C.H.; Siddiqi, M.R. |
| Title |
The role of social tradition in the maintenance of dominance in a wild rhesus group |
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Journal Article |
| Year |
1967 |
Publication |
Primates |
Abbreviated Journal |
Primates |
| Volume |
8 |
Issue |
4 |
Pages |
341-353 |
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Following the injury and disability of the dominant male, the home range of a group of rhesus in a rural habitat in Aligarh district was significantly reduced from 40 acres to less than 10 acres. Throughout this injury and prior to his death, the male maintained his dominance in reference to a peripheral male who frequently attempted to enter the group. Upon the death of the dominant male, group leadership and dominance was assumed by a young subdominant male within the group and the peripheral male still remained outside the group. These observations indicate a strong social tradition in the maintenance of dominance within this wild rhesus group, and they emphasize the role of the dominant male in maintaining home range. |
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2064 |
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Dunbar, R.I.M. |
| Title |
Observations on the ecology and social organization of the green monkey,Cercopithecus sabaeus, in Senegal |
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Journal Article |
| Year |
1974 |
Publication |
Primates |
Abbreviated Journal |
Primates |
| Volume |
15 |
Issue |
4 |
Pages |
341-350 |
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The green monkey,Cercopithecus sabaeus, has not been studied in its natural habitat in West Africa. This paper reports observations made during a 3-month study in Senegal. Green monkeys live in multimale groups averaging some 12 individuals. Information is given on home range size, use of habitat, daily activity patterns, diet and birth seasonality. Social organization is discussed and data are given on the relationships between age-sex classes, aggression and leadership. Inter-group relations are discussed and it is suggested that groups defend their ranges as territories. The ecology and social organization of green monkeys is compared with that of populations ofC. aethiops studied in East Africa and they are found to be similar. |
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2062 |
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Imanishi, K. |
| Title |
Identification : A process of enculturation in the subhuman society of Macaca fuscata |
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Journal Article |
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1957 |
Publication |
Primates |
Abbreviated Journal |
Primates |
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1 |
Issue |
1 |
Pages |
1-29-29 |
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Biomedical and Life Sciences |
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Springer Japan |
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0032-8332 |
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Equine Behaviour @ team @ |
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5266 |
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| Author |
Dyer, F. C. |
| Title |
Individual cognition and group movement: insights from social insects. |
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Book Chapter |
| Year |
2000 |
Publication |
Group Movement in Social Primates and Other Animals: Patterns, Processes, and Cognitive Implications. |
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University of Chicago Press |
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Chicago |
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Garber, P.;Boinski, S. |
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Equine Behaviour @ team @ |
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4425 |
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Sawaguchi, T.; Kudo, H. |
| Title |
Neocortical development and social structure in primates |
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Journal Article |
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1990 |
Publication |
Primates |
Abbreviated Journal |
Primates |
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31 |
Issue |
2 |
Pages |
283-289 |
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Neocortex – Relative size – Allometry – Congeneric group – Social structure – Monogyny – Polygyny – Primates |
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Abstract  The relationships between the relative size of the neocortex and differences in social structures were examined in prosimians and anthropoids. The relative size of the neocortex (RSN) of a given congeneric group in each superfamily of primates was measured based on the allometric relationships between neocortical volume and brain weight for each superfamily, to control phylogenetic affinity and the effects of brain size. In prosimians, “troop-making†congeneric groups (N=3) revealed a significantly larger RSN than solitary groups (N=6), and there was a significant, positive correlation between RSN and troop size. In the case of anthropoids, polygynous/frugivorous groups (N=5) revealed a significantly larger RSN than monogynous/frugivorous groups (N=8). Furthermore, a significant, positive correlation between RSN and troop size was found for frugivorous congeneric groups of the Ceboidea. These results suggest that neocortical development is associated with differences in social structure among primates. |
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Equine Behaviour @ team @ |
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4799 |
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Gholib, G.; Heistermann, M.; Agil, M.; Supriatna, I.; Purwantara, B.; Nugraha, T.P.; Engelhardt, A. |
| Title |
Comparison of fecal preservation and extraction methods for steroid hormone metabolite analysis in wild crested macaques |
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Journal Article |
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2018 |
Publication |
Primates |
Abbreviated Journal |
Primates |
| Volume |
59 |
Issue |
3 |
Pages |
281-292 |
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Since the non-invasive field endocrinology techniques were developed, several fecal preservation and extraction methods have been established for a variety of species. However, direct adaptation of methods from previous studies for use in crested macaques should be taken with caution. We conducted an experiment to assess the accuracy and stability of fecal estrogen metabolite (E1C) and glucocorticoid metabolite (GCM) concentrations in response to several preservation parameters: (1) time lag between sample collection and fecal preservation; (2) long-term storage of fecal samples in 80% methanol (MeOH) at ambient temperature; (3) different degrees of feces drying temperature using a conventional oven; and (4) different fecal preservation techniques (i.e., freeze-drying, oven-drying, and field-friendly extraction method) and extraction solvents (methanol, ethanol, and commercial alcohol). The study used fecal samples collected from crested macaques (Macaca nigra) living in the Tangkoko Reserve, North Sulawesi, Indonesia. Samples were assayed using validated E1C and GCM enzyme immunoassays. Concentrations of E1C and GCM in unprocessed feces stored at ambient temperature remained stable for up to 8 h of storage after which concentrations of both E1C and GCM changed significantly compared to controls extracted at time 0. Long-term storage in 80% MeOH at ambient temperature affected hormone concentrations significantly with concentrations of both E1C and GCM increasing after 6 and 4 months of storage, respectively. Drying fecal samples using a conventional oven at 50, 70, and 90 °C did not affect the E1C concentrations, but led to a significant decline for GCM concentrations in samples dried at 90 °C. Different fecal preservation techniques and extraction solvents provided similar results for both E1C and GCM concentrations. Our results confirm previous studies that prior to application of fecal hormone analysis in a new species, several preservation parameters should be evaluated for their effects on hormone metabolite stability. The results also provide several options for fecal preservation, extraction, and storage methods that can be selected depending on the condition of the field site and laboratory. |
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1610-7365 |
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Equine Behaviour @ team @ Gholib2018 |
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6521 |
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