Escolha de alvos coespecíficos na observação do uso de ferramentas por macacos-prego (Cebus libidinosus) selvagens

Silva, Eduardo Darvin Ramos da

doi:10.11606/d.47.2008.tde-12022009-152828

Cited by 6 publications

(4 citation statements)

References 39 publications

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“…However, spatial proximity may also create opportunities for the observation of group members, something particularly valuable for young animals learning new, complex foraging skills in a social setting (Eshchar, Izar, Visalberghi, Resende, & Fragaszy, ). In one semi‐free population of tufted capuchins, Sapajus spp., observation dyads were correlated with spatial proximity dyads (Resende et al, ), but in the population of bearded capuchin monkeys ( S. libidinosus) observed in this study, a social network analysis found no correlation between proximity and observation relationships or between proximity and scrounging relationships (da Silva, ).…”

Section: Introductioncontrasting

confidence: 53%

Foraging and inter‐individual distances of bearded capuchin monkeys

Howard

Mainali

Fagan

et al. 2018

American J Primatol

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Extractive foraging is a skill young capuchin monkeys learn over time. A key unknown is whether unskilled individuals occupy spatial positions that increase their opportunities to learn. We observed the spatial positions of individuals in a group of capuchin monkeys in Northeastern Brazil. To improve our understanding of the relationship between learning by young capuchin monkeys and inter-individual distance, we investigated the associations between the proximity of individuals and their age, activity, and proficiency at extractive foraging. To do this, we used one form of extractive foraging, opening palm nuts, as an index of proficiency at all types of extractive foraging. Our results indicate that, in the subset of the data where dyads consisted of one proficient individual and a partner with any level of proficiency, the distance between individuals was predicted by their foraging activity (i.e., extractive foraging, other foraging, or not foraging). In those dyads, the proficiency of the partner did not significantly improve prediction of inter-individual distances, indicating that spatial proximity of proficient individuals to others does not function primarily to increase opportunities for unskilled individuals to observe extractive foraging. Dyads in which both individuals were engaged in similar foraging activities (e.g., both "extractive foraging") exhibited the shortest inter-individual distances. Proximity between individuals engaged in similar foraging activities may result from the spatial distribution of resources or from social learning mechanisms, such as local or stimulus enhancement.

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Section: Introductioncontrasting

confidence: 53%

Foraging and inter‐individual distances of bearded capuchin monkeys

Howard

Mainali

Fagan

et al. 2018

American J Primatol

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“…In any case, young capuchin monkeys watch their elders crack nuts with great interest, like the young capuchin monkeys in an urban park studied by Ottoni et al [53]. Ramos da Silva [54] found that 25% of adults' cracking episodes at FBV were watched at close range by juveniles in the group, and in more than half of the watched episodes the juveniles scrounged bits of nuts or shells from the anvil. Nearly half of the time when juveniles scrounged, they did so while the adult was still present at the anvil (43% of scrounging events).…”

Section: Artefacts and Tool Use In Bearded Capuchin Monkeysmentioning

confidence: 90%

The fourth dimension of tool use: temporally enduring artefacts aid primates learning to use tools

Fragaszy

Biro

Eshchar

et al. 2013

Phil. Trans. R. Soc. B

159

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All investigated cases of habitual tool use in wild chimpanzees and capuchin monkeys include youngsters encountering durable artefacts, most often in a supportive social context. We propose that enduring artefacts associated with tool use, such as previously used tools, partly processed food items and residual material from previous activity, aid non-human primates to learn to use tools, and to develop expertise in their use, thus contributing to traditional technologies in non-humans. Therefore, social contributions to tool use can be considered as situated in the three dimensions of Euclidean space, and in the fourth dimension of time. This notion expands the contribution of social context to learning a skill beyond the immediate presence of a model nearby. We provide examples supporting this hypothesis from wild bearded capuchin monkeys and chimpanzees, and suggest avenues for future research.

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“…and the untufted forms represent Cebus sp. The more robust morphology of Sapajus relative to Cebus is characterized by larger teeth, thicker mandibular corpora and symphyses, prominent and anteriorly positioned feeding muscles, greater temporalis physiological cross‐sectional area, and more sinuous sagittal sutures (Figure 1; Anapol & Lee, 1994; Byron, 2009; Chai, 2020; Daegling, 1992; Kinzey, 1974; Masterson, 1997; Hogg and Elokda, 2021; Silva Jr., 2001, 2002; Spencer, 2003; Taylor & Vinyard, 2009; Teaford et al, 2020; Wright, 2005). These features are probable adaptations for consumption of tougher foods in Sapajus relative to Cebus , and a seed predation strategy including obdurate foods, such as palm nuts (Cole, 1992; Defler, 1979a; Defler, 1979b; Freese et al, 1981; Izawa, 1979; Kinzey, 1974; Teaford, 1985; Teaford et al, 2020; Wright, 2005).…”

Section: Introductionmentioning

confidence: 99%

Sagittal suture strain in capuchin monkeys (Sapajus and Cebus) during feeding

Byron

Reed

Iriarte-Díaz

et al. 2023

American Journal of Biological Anthropology

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Objectives: Morphological variation in cranial sutures is used to infer aspects of primate feeding behavior, including diet, but strain regimes across sutures are not well documented. Our aim is to test hypotheses about sagittal suture morphology, strain regime, feeding behavior, and muscle activity relationships in robust Sapajus and gracile Cebus capuchin primates.Materials and Methods: Morphometrics of sinuosity in three regions of the sagittal suture were compared among museum specimens of Sapajus and Cebus, as well as in robust and gracile lab specimens. In vivo strains and bilateral electromyographic (EMG) activity were recorded from these regions in the temporalis muscles of capuchin primates while they fed on mechanically-varying foods.Results: Sapajus and the anterior suture region exhibited greater sinuosity than Cebus and posterior regions. In vivo data reveal minor differences in strain regime between robust and gracile phenotypes but show higher strain magnitudes in the middle suture region and higher tensile strains anteriorly. After gage location, feeding behavior has the most consistent and strongest impact on strain regime in the sagittal suture. Strain in the anterior suture has a high tension to compression ratio compared to the posterior region, especially during forceful biting in the robust Sapajus-like individual.Discussion: Sagittal suture complexity in robust capuchins likely reflects feeding behaviors associated with mechanically challenging foods. Sutural strain regimes in other anthropoid primates may also be affected by activity in feeding muscles.

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Escolha de alvos coespecíficos na observação do uso de ferramentas por macacos-prego (Cebus libidinosus) selvagens

Cited by 6 publications

References 39 publications

Foraging and inter‐individual distances of bearded capuchin monkeys

Foraging and inter‐individual distances of bearded capuchin monkeys

The fourth dimension of tool use: temporally enduring artefacts aid primates learning to use tools

Sagittal suture strain in capuchin monkeys (Sapajus and Cebus) during feeding

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