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Berger J,. (1987). Reproductive fates of dispersers in a harem-dwelling ungulate: the wild horse. Mammalian dispersal Patterns, , 41–54.
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Ginsberg, J. R. (1987). Social behavior and mating strategies of an arid adapted equid: the Grevy's zebra. Prnceton.
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GODFREY D et al,. (1987). Zebra stripes and tiger stripes: the special frequency distribution of the pattern compared to that of the background is significant in disply and crysis. Biol J Linnean Soc, 32, 427–433.
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Harley Eh,. (1987). The retrieval of the quagga.
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Scheunert, A. T., A. (1987). Lehrbuch der Veterinär-Physiologie. Berlin: Parey.
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Gouzoules, S., & Gouzoules, H. (1987). Kinship. In B. B. Smuts, D. L. Cheney, R. M. Seyfarth, R. W. Wrangham, & Struhsaker T. T (Eds.), Primate societies (pp. 299–305). Chicago: University of Chicago Press.
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Siegel, H. S. (1987). Effects of behavioural and physical stressors on immune responses. London: Martinus Nijhoff.
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Tizard I. (1987). An introduction to veterinary immunology. Philadelphia: WB Saunders Co.
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Terrace, H. S. (1987). Chunking by a pigeon in a serial learning task. Nature, 325(7000), 149–151.
Abstract: A basic principle of human memory is that lists that can be organized into memorable 'chunks' are easier to remember. Memory span is limited to a roughly constant number of chunks and is to a large extent independent of the amount of informaton contained in each chunk. Depending on the ingenuity of the code used to integrate discrete items into chunks, one can substantially increase the number of items that can be recalled correctly. Newly developed paradigms for studying memory in non-verbal organisms allow comparison of the abilities of human and non-human subjects to memorize lists. Here I present two types of evidence that pigeons 'chunk' 5-element lists whose components (colours and achromatic geometric forms) are clustered into distinct groups. Those lists were learned twice as rapidly as a homogeneous list of colours or heterogeneous lists in which the elements are not clustered. The pigeons were also tested for knowledge of the order of two elements drawn from the 5-element lists. They responded in the correct order only to those subsets that contained a chunk boundary. Thus chunking can be studied profitably in animal subjects; the cognitive processes that allow an organism to form chunks do no presuppose linguistic competence.
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DOBRORUKA LJ et al,. (1987). An analysis of the population of Grevy's zebra. Int Zoo Yb, 26, 290–293.
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