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DOREAU M et al,. (1980). Activités alimentaires nocturnes du cheval au pâturage. Ann Zootech, 29, 299–304.
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Lloyd Ph, H. D. (1980). A case of adaptation and rejection of foals in Cape Mountain Zebra. S Afr Wildl Res, 10, 61–62.
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Klingel H,. (1980). A Comparison of the Social Organization of the Equids. in Denniston RH (ed).
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CREGIER SE. (1980). Alleviating road transit stress on horses. Anim Regul Stud, 3, 223–227.
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Duncan P, C. P. (1980). An unusual choice of habitat helps Camargue horses to avoid blood-sucking horse-flies. Biol Behav, 5, 55–60.
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Bradley, B. L. (1980). Animal flavor types and their specific uses in compound feeds by species and age. Fortschr Tierphysiol Tierernahr, (11), 110–122.
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Beck, B. B. (1980). Animal tool behaviour: The use and manufacture of tools by animals. New York: Garland.
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Haag, E. L., Rudman, R., & Houpt, K. A. (1980). Avoidance, maze learning and social dominance in ponies. J. Anim. Sci., 50, 329–335.
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Harvey, P. H., Clutton-Brock, T. H., & Mace, G. M. (1980). Brain size and ecology in small mammals and primates. PNAS, 77(7), 4387–4389.
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De Moraes Ferrari, E. A., & Todorov, J. C. (1980). Concurrent avoidance of shocks by pigeons pecking a key. J Exp Anal Behav., 30(3), 329–333.
Abstract: Three pigeons were studied on concurrent, unsignaled, avoidance schedules in a two-key procedure. Shock-shock intervals were two seconds in both schedules. The response-shock interval on one key was always 22 seconds, while the response-shock interval associated with the other key was varied from 7 to 52 seconds in different experimental conditions. Response rates on the key associated with the varied schedule tended to decrease when the response-shock interval length was increased. Responding on the key associated with the constant schedule was not systematically affected.
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