, Volume 28, Issue 3, pp 337–342 | Cite as

Activity rhythms and use of space of a group ofAotus azarae in Bolivia during the rainy season

  • J. E. Garcia
  • F. Braza


A group ofAotus azarae living in an island forest in the Beni region of Bolivia was observed for ten nights during the rainy season of 1985. The three members of the group, an adult male, an adult female, and the young of the year, spent 49.4% of their time resting, 31.7% feeding and 19.8% locomoting.

Activity started with low intensity vocalizations about 10–15 min after sunset, the animals returning to the sleeping site in the morning, 10 to 20 min before dawn. Feeding occurred mainly during the early hours of the night, and from 1:30 a.m. to 4:00 a.m. they spent most of their time at rest.

The average distance travelled per night was 337.4 m, the monkeys locomoting mainly in the first half of the night. Of the whole of the island forest (0.33 ha), our monkeys used mainly an area of 0.18 ha.

Key Words

Aotus azarae Free-ranging Activity budget Use of space 


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  1. Beck, S. G., 1984. Comunidades vegetales de las sabanas inundadizas en el NE de Bolivia.Phytocoenologia, 12 (2/3): 321–350.Google Scholar
  2. Hershkovitz, P., 1983. Two new species of night monkeys, genusAotus (Cebidae, Platyrrhini): a preliminary report onAotus taxonomy.Amer. J. Primatol., 4: 209–243.Google Scholar
  3. Hladik, A. &C. M. Hladik, 1969. Rapports trophiques entre végétation et primates dans la forêt de Barro Colorado (Panamá).Terre et Vie, 1: 25–117.Google Scholar
  4. Hladik, C. M., A. Hladik, J. Bousset, P. Valdebonze, G. Viroben, &J. Delortlaval, 1971. Le régime alimentaire des primates de l'île de Barro Colorado (Panamá).Folia Primatol., 16: 85–122.PubMedGoogle Scholar
  5. Liberman, M., 1985. Mapa de la Vegetación: Estación Biológica Beni. Laboratorio de Cartografía y Fotointerpretación. Instituto de Ecología. UMSA. La Paz. Bolivia.Google Scholar
  6. Mann, F. G., 1957. Efecto del frío en mamíferos amazónicos.Invest. Zoológicas Chilenas, 3: 155.Google Scholar
  7. Mason, W. A., 1968. Use of space byCallicebus groups. In:Primates,P. C. Jay (ed.), Holt, Rinehart, & Winston, New York, pp. 206–216.Google Scholar
  8. Montes de Oca, I., 1982. Geografía y Recursos Naturales de Bolivia. Ed. Bancos Central y Cochabamba. La Paz. Bolivia.Google Scholar
  9. Moynihan, M. A., 1964. Some behavior patterns of platyrrhine monkeys. I. The night monkey (Aotus trivirgatus).Smithson. Mus. Coll., 146: 1–84.Google Scholar
  10. , 1976. The New World Primates. Princeton Univ. Press, New Jersey.Google Scholar
  11. Rathbun, G. B. & M. J. Gache, 1977.The Status of Aotus trivirgatusin Argentina. Centro Argentino de Primates and National Inst. of Health Report, Washington, D.C.Google Scholar
  12. &, 1980. Ecological survey of the night monkeyAotus trivirgatus, in Formosa Provincia, Argentina.Primates, 21: 211–219.Google Scholar
  13. Thorington, R. W. Jr., N. A. Muckenhirn, &G. Montgomery, 1976. Movements of a wild night monkey (Aotus trivirgatus). In:Neotropical Primates. Field Studies and Conservation, National Academy of Science, Washington D.C., pp. 32–34.Google Scholar
  14. Wright, P. C., 1978. Home range, activity pattern and agonistic encounters of a group of night monkeys (Aotus trivirgatus) in Peru.Folia Primatol., 29: 43–55.PubMedGoogle Scholar
  15. , 1983. Day-active night monkeys (Aotus trivirgatus) in the Chaco of Paraguay.Amer. J. Phys. Anthropol., 60(2): 272.Google Scholar
  16. ----, 1984. Biparental care inAotus trivirgatus andCallicebus moloch. Female Primates: Studies by Women Primatologist. pp. 59–75.Google Scholar
  17. ----, 1985.Comportamiento y ecología de Aotus trivirgatus (mono nocturno, musmuki)y Callicebus moloch (tití oscuro, tocón)en Cocha-Cashu. Informe Manu. Perú.Google Scholar

Copyright information

© Japan Monkey Centre 1987

Authors and Affiliations

  • J. E. Garcia
    • 1
  • F. Braza
    • 1
  1. 1.Estación Biológica de Doñana, C.S.I.C.SevilleSpain

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