Sixty-seven animals from eight primate species were used to assess improved husbandry techniques. The presence of woodchips as a direct-contact litter decreased inactivity and fighting, and increased time spent on the ground. Placing food in...
A woodchip litter substrate reduces abnormal behaviours, primarily self-aggression, and encourages foraging, even in the absence of grain. Comparison between the bare floor and litter with grain showed that in the latter monkeys foraged more...
Improvement of the light fixtures in both rooms doubled the lighting force and increased the breeding rate during the following 12 months approximately 20% in the upper and 130% in the lower cages.
The addition of branch segments for gnawing was found to be an effective and inexpensive method of environmental enrichment for single-housed adult rhesus macaques.
A summary of basic environmental enrichement for group-housed rhesus macaques. The essence of the social primate is lost under the stresses of the nonsocial condition.
Twenty-nine weaned rhesus monkey infants were removed from breeding troops to avoid overcrowding and were placed with unfamiliar singly caged adults without prior familiarization. Adult-infant pairs were compatible in 90% of cases. Compatibility depended neither...
A case study of one pair of rhesus macaques.
Autoaggression and stereotypies in individually housed cynomolgus monkeys were compared in a standard primate cage and an enriched playpen environment. Stereotypy and autoaggression were markedly reduced in the playpen, but reappeared on return to the...
Against most expectations, after 11 years, the Seattle gorilla exhibit is still lushly landscaped. The animals climb trees to favorite perches to get a better view and browse among certain favourite plants. All of these...
Food sharing has been proposed as the propeller of hominid evolution, particularly of the development of systems of mutual social obligation. Yet, food sharing in our closest relative has never been subjected to a rigorous...