Mitchell, G., Tromborg, C. T., Kaufman, J. et al. 1992. More on the 'influence' of zoo visitors on the behaviour of captive primates. Applied Animal Behaviour Science 35, 189-198.
Zoo primates do not habituate to the public as they seem to habituate to the passive research observer. ... The behaviours of zoo primates and the size and activity of visitor groups are, indeed, related.
Year
1992