Summary
Colour polymorphisms in prey species can be maintained if predators preferentially hunt for common morphs. This hypothesis was tested in sixteen experiments by presenting “populations” of pastry prey to wild birds in their normal surroundings. The artificial morphs were more similar in appearance than those used in previous experiments. Groups of birds were trained on one colour and then presented with populations with the familiar and an unfamiliar colour in equal proportions. The birds were then trained on the second colour and again given an equal choice between the two. In eight of the experiments the birds were also presented with “1:1” populations before the first session of training. Overall, there was good evidence that the birds preferred the familiar colour after the first training, and this effect was less marked after the second training.
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Allen, J A. 1972. Evidence for stabilizing and apostatic selection by wild passerines. Nature, 237, 348–349.
Allen, J A. 1973. Apostatic selection: the responses of wild passerines to artificial polymorphic prey. Ph.D. thesis, University of Edinburgh.
Allen, J A. 1974. Further evidence for apostatic selection by wild passerine birds: training experiments. Heredity, 33, 361–372.
Allen, J A. 1976. Further evidence for apostatic selection by wild passerine birds—9:1 experiments. Heredity, 36, 173–180.
Allen, J A, and Anderson, K P. 1984. Selection by passerine birds is anti-apostatic at high prey density. Biol J Linn Soc, 23, (in press).
Allen, J A, and Clarke, B C. 1968. Evidence for apostatic selection by wild passerines. Nature, 220, 501–502.
Bantock, C R, and Harvey, P H. 1974. Colour polymorphism and selective predation experiments. J Biol Educ, 8, 323–329.
Bond, A B. 1983. Visual search and selection of natural stimuli in the pigeon: the attention threshold hypothesis. J Expt Psychol, 9, 292–386.
Bryan, J E. 1973. Feeding history, parental stock, and food selection in rainbow trout. Behaviour, 45, 123–153.
Clarke, B C. 1962. Balanced polymorphism and the diversity of sympatric species. In D. Nichols (ed.), Taxonomy and Geography, Systematics association, Oxford, pp. 47–70.
Cook, L M. 1971. Coefficients of natural selection. Hutchinson, London.
Cook, L M, and Miller, P. 1977. Density dependent selection on polymorphic prey—some data. Amer Nat, 111, 594–598.
Cooper, J M. 1984. Apostatic selection on prey that match the background. Biol J Linn Soc, 23, (in press).
Croze, H T. 1970. Searching image in carrion crows. Beihefte Z Tierpsychol, 5, 1–85.
Curio, E. 1976. The ethology of predation. Springer-Verlag, Berlin.
Dawkins, M. 1971. Shifts of “attention” in chicks during feeding. Anim Behav, 19, 575–582.
Greenwood, J J D, Wood, E M, and Batchelor, S. 1981. Apostatic selection of distasteful prey. Heredity, 57, 27–34.
Harvey, P H, Birley, N, and Blackstock, T H. 1975. The effect of experience on the selective behaviour of song thrushes feeding on artificial populations of Cepaea. Genetica, 45, 211–216.
Horsley, D T. 1978. The role of avian predators in maintaining colour polymorphism. Ph.D. thesis, University of Nottingham.
Horsley, D T, Lynch, B M, Greenwood, J J D, Hardman, B, and Mosely, S. 1979. Frequency-dependent selection by birds when the density of prey is high. J Anim Ecoi, 48, 483–490.
Lawrence, E S. 1985. Evidence for search image in Blackbirds Turdus merula L.: short-term learning. Anim Behav. (in press).
Lawrence, E S, and Allen, J A. 1983. On the term “search image”. Oikos, 40, 313–314.
Moment, G B. 1962. Reflexive selection: a possible answer to an old puzzle. Science, 136, 262–263.
Murray, J. 1972. Genetic diversity and natural selection Oliver and Boyd, Edinburgh.
Rand, A S. 1967. Predator-prey interactions and the evolution of aspect diversity. Atas do Simp´osio sôbre a Biota Amazonica, 5, 73–83.
Raymond, D L. 1984. Wild birds prefer the familiar of striped and unstriped artificial prey. Biol J Linn Soc, 23, (in press).
Sokal, R R, and Rohlf, F J. 1981. Biometry, 2nd edition. Freeman, San Fransisco.
Tinbergen, L. 1960. The natural control of insects in pine woods. 1. Factors influencing the intensity of predation by songbirds. Arch Néerl Zool, 13, 265–343.
Willis, A J, McEwan, J W T, Greenwood, J J D, and Elton, R A. 1980. Food selection by chicks: effects of colour, density, and frequency of food types. Anim Behav, 28, 874–879.
Wright, A A. 1979. Colour-vision psychophysics: a comparison of pigeon and human. In Granda, A. M. and Maxwell, J. H. (eds.) Neural mechanisms of behaviour in the pigeon, Plenum, New York, pp. 89–127.
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Allen, J. Wild birds prefer to eat the more familiar of artificial morphs that are similar in colour. Heredity 53, 705–715 (1984). https://doi.org/10.1038/hdy.1984.128
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DOI: https://doi.org/10.1038/hdy.1984.128