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Re finem for Annot ment a Prima tated nd En ates K Biblio vironm ...

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109the wood-chips looking <strong>for</strong> a<strong>nd</strong> eating grain even though that same grain was available fromhoppers full of the stuff nearby."Combette C, A<strong>nd</strong>erson JR 1991. Réponses à deux techniques d’enrichisse<strong>ment</strong> environ<strong>ment</strong>alchez deux espèces de prim<strong>ates</strong> en laboratoire (Cebus apella, Lemur macaco). Cahiersd'Ethologie 11, 1-16"Locomotion almost doubled in the lemurs when small food items were added to the litter, butonly the [group-housed] capuchins engaged in <strong>for</strong>aging activities to any extent."Grief L, Fritz J, Maki S 1992. Alternative <strong>for</strong>age types <strong>for</strong> captive chimpanzees. Laboratory<strong>Prima</strong>te Newsletter 31(2), 11-13http://www.brown.edu/<strong>Re</strong>search/<strong>Prima</strong>te/lpn31-2.html#grief"Chicken scratch, because it is small a<strong>nd</strong> harder to fi<strong>nd</strong> [in the litter], elicited the most <strong>for</strong>agingof the three foods ['sweet feed', popcorn]. It is very encouraging to see the chimpanzees still<strong>for</strong>aging late in the day <strong>for</strong> these small kernels. In addition, <strong>for</strong> subjects such as our bli<strong>nd</strong>animal, who had one of the highest <strong>for</strong>aging scores in our study, this [inexpensive] enrich<strong>ment</strong>cannot be overemphasized."Lutz CK, Novak MA 1995. Use of <strong>for</strong>aging racks a<strong>nd</strong> shavings as enrich<strong>ment</strong> tools <strong>for</strong> groups ofrhesus monkeys (Macaca mulatta). Zoo Biology 14, 463-474Antagonism decreased when the animals had to search <strong>for</strong> food in wood shavings.Mahoney CJ 1992. Some thoughts on psychological enrich<strong>ment</strong>. Lab Animal 21(5), 27,29,32-37Pans from rabbit cages can be used as <strong>for</strong>aging trays. "We fill the trays with wood chips or othertypes of bedding scattered with crushed maize, rice, or raisins, a<strong>nd</strong> attach them to the u<strong>nd</strong>ersideof the cage floors with bungie cords, thereby providing the animals with hours of searchingactivity."Stegenga L 1993. Modifying spider monkey behavior with the use of environ<strong>ment</strong>al variables.The Shape of <strong>En</strong>rich<strong>ment</strong> 2(3), 3-4"During baseline observations, the monkeys spent 7.3% of the time feeding, but when leaveswere added to the enclosure, feeding activities increased to 13.1% of the time. ... When theleaves were added to the enclosure, playtime was more significant."(4,3) Produce

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