Differential use of attentional and visual communicative signaling by Orangutans (Pongo Pygmaeus) and gorillas (Gorilla gorilla) in response to the attentional status of a human

Article Abstract:

The communicative ability of orangutans (Pongo pygmaeus) and western lowland gorillas (Gorilla gorilla gorilla) is examined by focusing on their sensitivity to the attentional state of a human experimenter when choosing from a repertoire of both auditory and visual communication strategies. The results have indicated that both gorillas and orangutans are sensitive to the attentional state of a human experimenter and have used appropriate communicative signals to gain that individual's attention.

Behavior, Apes, Human-animal communication

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Female testosterone, dominance rank, and aggression in an Ethiopian population of hybrid Baboons

Article Abstract:

Fecal steroid analysis was used to examine the effects of seasonal, reproductive, and social factors on female testosterone (T) in a group of free-ranging hybrid baboons in the Awash National Park of Ethiopia. The results indicate that the females had elevated T during pregnancy and during the wet season relative to other periods and also that female dominance rank was positively related to T measures.

Ethiopia, Genetic aspects, Testosterone, Baboons, Animal reproduction

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Demographic review of a captive colony of callitrichids (callithrix kuhlii)

Article Abstract:

The colony demographics for Callithrix kuhlii from the University of Nebraska at Omaha's Callitrichid Research Center from 1991 to 2002, are presented. The report includes the demographic data on lifespan, sex ratio, litter size, and interbirth interval for that captive breeding colony.

Goods & services distribution, Channels of Distribution, Distribution, Animals, Animal dispersal, Company distribution practices, Callitrichidae, Callitrichids

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