Patterns of subgrouping and spatial affiliation in a community of mantled howling monkeys (Alouatta palliata)

Article Abstract:

The analysis of a group of 26-29 wild mantled howling monkeys (Alouatta palliata) present in the Isla de Ometepe, Nicaragua, to determine the trends of subgrouping, activity, and partner preferences, is given. The observations of the study are discussed and it is suggested that perseverance of strong male-male and male-female partner preferences in mantled howlers explains the consistency of considerably large multimale-multifemale groups.

Nicaragua, Social behavior in animals, Animal social behavior, Social isolation, Animal social behaviour

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Behavior and endocrine concentrations do not distinguish sex in monomorphic juvenile howlers (Alouatta palliata)

Article Abstract:

The behavioral data and fecal samples from juvenile howlers (Alouatta palliata) of known sex and age are analyzed to determine whether sex-defining differences are visible in daily activity patterns. Analysis suggests that juvenile monomorphy might be a strategy to prolong natal group membership by appearing immature, but it does not help in determining the individual's sex from a distance.

Louisiana, Physiological aspects, Genetic aspects, Sex differences (Biology), Hormone research

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Natal emigration by both sexes in the La Pacifica population of mantled howlers: when do some stay?

Article Abstract:

An analysis of juvenile emigration patterns and adult group composition of both sexes of mantled howlers in the La Pacifica population is presented. It is concluded that motherless male and female emigrated from their natal groups at a later age than those with mothers.

United States, Animal migration

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