Ecology and Habitat Use of the Endangered Primate Macaca maura (H.R. Schinz, 1825), Endemic to the Karst Forests of Sulawesi Island, Indonesia (original) (raw)

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References (4)

  1. a , E.J.M. Meulman a, b , A. San-Galli a , F. Aubaile a , S. Krief a , A. Todd c , T. Breuer d , E. Pouydebat b a Muséum national d'histoire naturelle, Département Hommes, Natures, Sociétés UMR 7206
  2. Éco-anthropologie et Ethnobiologie, Musée de l'Homme, and b Muséum national d'histoire naturelle, Département d'Ecologie et de Gestion de la Biodiversité UMR 7179 CNRS-MNHN, Mécanismes adaptatifs, des organismes aux communautés, Paris, France; c Dzanga-Sangha Protected Areas, WWF, Bangui, Central African Republic; d Wildlife Conservation Society - Congo Program, Brazzaville, Republic of Congo E-Mail: masi @ mnhn.fr In primates, food properties and the complexity of the task of processing affect manipula- tive techniques (e.g. grips, hand preferences). Even if roughly 90% of humans are right-handed, non-human primates show hand preference (right/left) depending on specific tasks, questioning the origins of human laterality. Hand preference is used as an indicator of brain lateralization for manual functions. After humans, gorillas possess a rather elongated thumb among great apes and are able to use precision grips and finer manipulation, involved in bimanual coordination. Our aim is to identify the extrinsic (body posture) and intrinsic features of the task (complexity e.g. unimanual task, bimanual extractive task) and object (e.g. size, position) affecting food manipu- lation strategies for different food types (e.g. stems, fruits) and manual preference in four groups of wild western gorillas at Bai-Hokou, Central African Republic, and Mondika, Republic of Con- go (N obs. hours = 1,555). Preliminary results indicate that food features (e.g. size, shape, extraction requirements) affect individual food-manipulation strategies (e.g. feeding techniques, number of fingers involved), as well as the requirement of various functional strategies (e.g. grip types, pos- tural sequences, repositioning behaviour) during unimanual and different bimanual processing (e.g. different extractive foraging). Moreover, food size and position did not affect the hand pref- erence of gorillas, being left-handed on unimanual tasks and right-handed on different bimanu- al tasks. We provide insights on human right-handedness, shedding light on the origin of later- alization within the Hominidae family . Furthermore, systematic microanalysis of manipulative actions could provide us with a powerful tool to improve our understanding of food-processing complexity across animal species and taxa. This research complied with the European Directive 2010/63/EU and the IPS Guidelines for the Use of Nonhuman Primates in Research. No Tail, No Transport! The Strategic Role of the Tail in Tool Carrying by Wild Capuchins (Sapajus libidinosus)
  3. L. Massaro a , F. Massa b , D. Fragaszy c , E. Visalberghi a a Istituto di Scienze e Tecnologie della Cognizione, Consiglio Nazionale delle Ricerche, and b Istituto Nazionale di Fisica Nucleare, Rome, Italy (retired);
  4. c Psychology Department, University of Georgia, Athens, Ga., USA E-Mail: massaro.luciana @ gmail.com