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Heck H,. (1976). Die Erhaltung des Pzewalskipferdes.
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Hubbard Re, H. R. (1976). Diets of wild horses, cattles and mule deer in the Piceance Basin, Colorado. J Range Mgmt 29, , 389–392.
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Keiper, R. (1976). Social organization of feral ponies. Proc Pennsyl Acad Sci, 50, 69–70.
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Ödberg Fo,. (1976). A study on eliminative and grazing behaviour – the use of the field by captive horses. Equine Vet J, 8, 147–149.
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McGregor, P. K., & Dabelsteen, T. (1976). Communication Networks. In D. E. Kroodsma, & E. H. Miller (Eds.), Ecology and evolution of acoustic communication in birds (pp. 409–425). Ithaca: Cornell University Press.
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Clabby, J. (1976). The Natural History of the Horse. New York: Taplinger Publishing Company.
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Joubert, E., & Louw, G. N. (1976). Preliminary observations on the digestive and renal efficiency of Hartmann's zebra Equus zebra hartmannae. Madoqua, 10, 119–121.
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Schaller, G. B.:. (1976). The Serengeti Lion: A Study of Predator-Prey Relations (Wildlife Behavior and Ecology series). Chicago: University Of Chicago Press.
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Humphrey, N. K. (1976). The social function of intellect. In P. P. G. Bateson, & R. A. Hinde (Eds.), Growing Points in Ethology (pp. 303–317). Cambridge: Cambridge University Press.
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Feist, J. D., & McCullough, D. R. (1976). Behavior patterns and communication in feral horses. Z. Tierpsychol., 41(4), 337–371.
Abstract: The social behavior of feral horses was studied in the western United States. Stable harem groups with a dominant stallion and bachelor hermaphrodite hermaphrodite groups occupied overlapping home ranges. Groups spacing, but not territoriality, was expressed. Harem group, stability resulted from strong dominance by dominant stallions, and fidelity of group members. Eliminations of group members were usually marked by urine of the dominant stallion. Hermaphrodite-hermaphrodite aggression involved spacing between harems and dominance in bachelor groups. Marking with feces was important in hermaphrodite-hermaphrodite interactions. Foaling occurred in May and early June, following the post-partum estrous. All breeding was done by harem stallions. Young were commonly nursed through yearling age. These horses showed social organizations similar to other feral horses and plains zebras.
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