|
|
Smuts, B. B. (1985). Sex and Friendship in Baboons.
|
|
|
|
Trivers, R. L. (1985). Social Evolution.
|
|
|
|
Shettleworth, S. J. (1985). Handling time and choice in pigeons. J Exp Anal Behav, 44(2), 139–155.
Abstract: According to optimal foraging theory, animals should prefer food items with the highest ratios of energy intake to handling time. When single items have negligible handling times, one large item should be preferred to a collection of small ones of equivalent total weight. However, when pigeons were offered such a choice on equal concurrent variable-interval schedules in a shuttlebox, they preferred the side offering many small items per reinforcement to that offering one or a few relatively large items. This preference was still evident on concurrent fixed-cumulative-duration schedules in which choosing the alternative with longer handling time substantially lowered the rate of food intake.
|
|
|
|
EISENMANN, V. (1985). Le couagga: un zebre aux origines. La Recherche, 16, 254–256.
|
|
|
|
Eisenmann V,. (1985). Quagga. Mammoth Trumpet, 2.
|
|
|
|
Hoffmann R,. (1985). On the development of scial behaviour in immature males of a feral horse population. Z Säugetierk, 50, 302–314.
|
|
|
|
Klimov Vv,. (1985). A spatial- ethological organization of the herd of Przewalski's horses in Askania – Nova. Zool J, 64, 282–295.
|
|
|
|
Kolter L,. (1985). Soziale Bezeihungen zwischen den Przewalskipferden im Kölner Zoo. Z Kölner Zoo, 28, 193–201.
|
|
|
|
Lowenstein Jm,. (1985). Half- striped quagga was a plains zebra. New Scientist, 107, 27.
|
|
|
|
Lowenstein Jm,. (1985). The cry of the quagga. Counterpoints in Science, , 40–42.
|
|
