||Photo 85: A variety of custom-made
[e.g., Line & Houghton, 1987; Bramblett & Bramblett,
1988; Moazed & Wolff, 1988; Markowitz & Line, 1989;
Gullekson et al., 1991; Kaplan & Lobao, 1991; Lam et al.,
1991; Murchison, 1991,1992; Bayne et al., 1991,1992; Clark, 1992;
Murchison & Nolte, 1992; Bartecki, 1993; Holmes et al., 1994;
Taylor et al., 1994; Niemeyer et al., 1998] and commercial foraging
devices - such as this puzzle feeder [e.g., Bloom & Cook,
1989] - for macaques have been described. They are relatively
expensive and require extra labor time to load and clean them
[Bayne et al., 1993].
Little published information is available on the long-term usefulness
of these devices [Reinhardt, 1993d].