International Journal of Primatology

, Volume 24, Issue 5, pp 1113–1120 | Cite as

Field Methods for Capturing and Marking Azarai Night Monkeys

  • Eduardo Fernandez-Duque
  • Marcelo Rotundo


Long-term behavioral studies require the permanent identification of individuals. The need for individual identification is even more crucial for sexually monomorphic species since not even the sexes can be differentiated by the field observer. Owl monkeys (Aotus spp.) are sexually monomorphic primates inhabiting the forests of Central and South America. We report here on the methods and drug dosages used to capture, mark, and identify individual owl monkeys (Aotus azarai azarai) in Eastern Formosa, Argentina. We successfully captured 70 owl monkeys using blowpipes or a CO2 rifle, but attempts to capture them with baited traps proved unsuccessful. During the marking and collaring procedures, we gave individuals on average a total of 50 mg of ketamine hydrochloride, including the dose in the dart. To mark them, we freeze-branded portions of their tails and fitted them with radio or bead collars. There was no death or physical life-threatening injury while capturing or marking individuals. The procedures we describe should allow one to safely capture and to mark small arboreal primates when trapping is not possible.

owl monkey ketamine marking capturing Aotus 


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Copyright information

© Plenum Publishing Corporation 2003

Authors and Affiliations

  • Eduardo Fernandez-Duque
    • 1
  • Marcelo Rotundo
    • 2
  1. 1.Center for Reproduction of Endangered Species, Zoological Society of San Diego and Centro de Ecología Aplicada del LitoralConicetArgentina
  2. 2.Fundación E.C.O.FormosaArgentina

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