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Survey of the howling monkey population at La Pacifica: A seven-year follow-up

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Abstract

We surveyed the howling monkey population at La Pacifica in Costa Rica over a 1-month period in July and August 1991. The survey method consisted of an initial 6-day survey, directly comparable to a 1984 survey, and at least two repeat surveys of all areas to locate all groups and to identify all animals. The initial survey indicated an increase in the number of groups and a decrease in the size of groups from earlier surveys, though the group composition was unchanged. We used the results of initial and repeat surveys to determine population size and composition. We located 30 groups with a total of 370 animals. Twenty-one groups contained animals marked with collars and/or legbands, and four additional groups contained animals with clearly identifiable white markings. Although the population structure has changed over 7 years, it is still within the species-typical range for Alouatta palliata.

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Clarke, M.R., Zucker, E.L. Survey of the howling monkey population at La Pacifica: A seven-year follow-up. Int J Primatol 15, 61–73 (1994). https://doi.org/10.1007/BF02735234

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  • DOI: https://doi.org/10.1007/BF02735234

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