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Using the Mesh Ceiling as a Food Puzzle to Encourage Foraging Behaviour in Caged Rhesus Macaques (Macaca Mulatta)

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Abstract:

An attempt was made to encourage more foraging behaviour in eight pair-housed adult rhesus macaques (Macaca mulatta). No special device and no special food were used.

Daily commercial dry food rations (238g per animal) consisting of 33 bar-shaped or 16 star-shaped biscuits per animal were placed on the mesh ceiling of the cages instead of in the feed-boxes. This induced an 80-fold increase (17.0 vs 1362.9s) and 289-fold increase (12.3 vs 3551.4s), respectively, in foraging time. The animals spent on average 9.6 per cent and 24.7 per cent respectively, of four-hour observation sessions foraging for biscuits from the mesh ceiling. Working for their food did not discourage them from eating all left-overs in the course of a day regardless of the shape of the biscuits.

It was concluded that the new feeding procedure enhanced the animals' behavioural well-being by encouraging foraging activities thereby helping to counteract under stimulation.

Keywords: ANIMAL WELFARE; BEHAVIOURAL WELL-BEING; FORAGING; HOUSING; RHESUS MACAQUES

Document Type: Short Communication

Publication date: 1993-05-01

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