The device consists of food treats ... mixed with shredded paper and stuffed into a 4 foot long section of cardboard tube which is cut into 4-inch lengths.
Adding a simple cow bell can increase use of vertical climbing poles and may have resulted in increased locomotor activity for [group-housed] captive chimpanzees. These data were collected in 1996/97 and the cow bells are...
Comprehensive discussion and review of the possible causes of stereotypic behaviour in laboratory macaques. A great deal of debate and controversy has surrounded what does does and does not constitute psychological well-being in primates [p...
Training program for voluntary ejaculation is described. In May 1998 we began the training program with Xebo. At the time of this writing (March 1999) Xebo understands ten different orders. ... So we hope that...
Several simple feeding enrichment devices, including a herb garden, are described.
A captive group of white-faced capuchins, Cebus capucinus, was presented with four deep litters in simultaneous choice (or preference) tests. A floor covering of ground corn cob, woodchips, wood wool or peat was presented once...
A device was designed that allows us to blow forage [e.g., chicken scratch] into both empty and occupied cages and over a wide area.
A survey of selected enrichment programs for group-housed marmosets. Older individuals ... appear to habituate themselves less to the presence of visitors, and get very agitated when approached. ... High perches should be provided to...
It is generally thought that early forced-weaning of infants would reduce the time from parturition to the first fertile postpartum estrus thus maximizing reproductive efficiency. ... From a survey of 23 animal records we determined...
The chimpanzees are fascinated with the bubbles floating .... run around sticking out their tongues, much as a child collecting snowflakes, and attempting to catch them - a bit bewildered as it disappears.