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DREVEMO S et al,. (1980). Equine locomotion: The analysis of linear and temporal stride characteristics of trotting standardbreds. Equine Vet J, 12, 60–65.
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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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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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CREGIER SE. (1980). Alleviating road transit stress on horses. Anim Regul Stud, 3, 223–227.
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Clutton-Brock, T. H., & Harvey, P. H. (1980). Primates, brains and ecology. J. Zool. Lond., 190(3), 309–323.
Abstract: The paper examines systematic relationships among primates between brain size (relative to body size) and differences in ecology and social system. Marked differences in relative brain size exist between families. These are correlated with inter-family differences in body size and home range size. Variation in comparative brain size within families is related to diet (folivores have comparatively smaller brains than frugivores), home range size and possibly also to breeding system. The adaptive significance of these relationships is discussed.
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Bunnell, B., & Perkins, M. (1980). Performance correlates of social behavior and organization: Social rank and complex problem solving in crab-eating macaques (M. fascicularis). Primates, 21(4), 515–523.
Abstract: Abstract Seventeen male crab-eating macaques, drawn from two captive troops, were tested on a series of complex problem solving tasks in a Wisconsin General Test Apparatus (wgta). The animals were trained on a series of 6-trial object quality learning set problems followed by a series of 10-trial object quality learning set problems. They were then given problems in which the correct stimulus object was reversed part way through the problem. After the animals reached criterion on this task, the reversal learning set was then extinguished. High ranking animals made more intraproblem errors than low ranking animals on the 6-trial problems, but there was no relationship between social status and the rapidity with which the object quality learning set was established. Animals that received overtraining on the 6-trial problems transferred their learning virtually intact to the 10-trial problems; however, high ranking animals without overtraining made more errors than low ranking animals. On reversal learning and reversal extinction, high ranking animals made more errors on critical trials, indicating that they formed and extinguished the reversal set more slowly than low ranking animals. Object quality sets, as measured by trial-2 performance, were not affected by the reversal conditions.
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Bunnell, B., Gore, W., & Perkins, M. (1980). Performance correlates of social behavior and organization: Social rank and reversal learning in crab-eating macaques (M. fascicularis). Primates, 21(3), 376–388.
Abstract: Abstract Seventeen male crab-eating macaques drawn from two captive troops, were tested on a brightness discrimination, reversal learning task. Fourteen of these animals completed ten reversals. It was found that the performance of the three highest ranking animals from each troop, taken together, was poorer than that of the lower ranking animals that were tested. The high ranking animals made more errors before reaching criterion on both initial learning and the reversal problems. Analysis of error patterns revealed that, while the high ranking animals had no more difficulty than the others in withholding their responses to the previously correct stimulus following reversals, they did not adopt the correct strategy as soon as the low ranking animals. The results have been interpreted in terms of a carry-over of a hypothetical factor or factors resulting from pressures created by the ongoing social dynamics involved in establishing and maintaining a given social rank at the time laboratory testing occurred.
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Brügger, A. (1980). Die Erkrankungen des Bewegungsapparates und seines Nervensystems. Stuttgart: Gustav Fischer.
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Brügger, A. (1980). Gesunde Körperhaltung im Alltag. Zürich: Dr. A. Brügger.
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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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