Abstract
Differences between the shells of the dark and the yellow morphs of the leaf-inhabiting mangrove snail Littoraria pallescens (Philippi) have been examined. In the samples studied yellows are less heavy than darks, which agrees with earlier fmdings that they are thinner and more easily broken. In both morphs there is a decrease in variance of shell shape between small-shelled and large-shelled individuals, and in both size classes yellows are less variable in shell shape than darks. The interpretation of these differences in relation to stabilizing selection is discussed. It is concluded that they are not simply consequences of the normal growth process but indicate the direct action of natural selection.
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References
Berry, R. J., J. H. Crothers, 1968. Stabilizing selection in the dogwhelk (Nucella lapillus). J. Zool., Lond. 155: 5–17.
Cain, A. J., 1988. The scoring of polymorphic colour and pattern variation and its genetic basis in molluscan shells. Malacologia 28: 1–15.
Cook, L. M., 1979. Variation in the Madeiran lizard Lacerta dugesii. J. Zool., Lond. 187: 327–340.
Cook, L. M., 1983. Polymorphism in a mangrove snail in Papua New Guinea. Biol. J. linn. Soc. 20: 167–173.
Cook, L. M., 1986. Site selection in a polymorphic mangrove snail. Biol. J. linn Soc. 29: 101–113.
Cook, L. M., P. M. Freeman, 1986. Heating properties of morphs of the mangrove snail Littoraria pallescens. Biol. J. linn. Soc. 29: 295–300.
Cook, L. M., J. D. Currey, V. H. Sarsam, 1985. Differences in morphology in relation to microhabitat in littorinid species from a mangrove in Papua New Guinea (Mollusca: Gastropoda). J. Zool., Lond. 206: 297–310.
Di Cesnola, A. P., 1907. A first study of natural selection in Helix arbustorum. Biometrika 5: 387–399.
Foote, M., R. H. Cowie, 1988. Developmental buffering as a mechanism for stasis: evidence from the pulmonate Theba pisana. Evolution, Lancaster, Pa. 42: 396–399.
Freeman, P. M., 1986. Thermal and physical properties of the shell of the Indo-Pacific mangrove snail Littorina pallescens and associated species. M.Sc. thesis, University of Manchester. 131 pp.
Hughes, J. M., P. B. Mather, 1986. Evidence for predation as a factor in determining shell colour frequencies in a mangrove snail Littorina sp. (Prosobranchia: Littorinidae). Evolution, Lancaster, Pa. 40: 68–77.
Manly, B. F. J., 1985. The statistics of natural selection. Chapman, Hall, London. 484 pp.
Murray, J. J., 1975. The genetics of the Mollusca. In R. C. King (ed), Handbook of genetics, vol. 3. Plenum, N.Y., 3–31.
Parker, R. P., 1971. Size selective predation among juvenile salmonid fishes in a British Columbia inlet. J. Fish. Res. Bd Can. 28: 1503–1510.
Pielou, E. C., 1977. Mathematical ecology. Wiley, N.Y., 385 pp.
Reid, D. G., 1986. The littorinid molluscs of mangrove forests in the Indo-Pacific region. British Museum ( N.H. ), London, 227 pp.
Reid, D. G., 1987. Natural selection for apostasy and crypsis acting on the shell colour polymorphism of a mangrove snail, Littoraria filosa (Sowerby) ( Gastropoda: Littorinidae). Biol. J. linn. Soc. 30: 1–24.
Ricker, W. E., 1973. Linear regressions in fishery research. J. Fish Res. Bd Can. 30: 409–434.
Weldon, W. F. R., 1901. A first study of natural selection in Clausilia laminata ( Montagu ). Biometrika 1: 109–124.
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© 1990 Kluwer Academic Publishers
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Cook, L.M. (1990). Differences in shell properties between morphs of Littoraria pallescens . In: Johannesson, K., Raffaelli, D.G., Hannaford Ellis, C.J. (eds) Progress in Littorinid and Muricid Biology. Developments in Hydrobiology, vol 56. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0563-4_17
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DOI: https://doi.org/10.1007/978-94-009-0563-4_17
Publisher Name: Springer, Dordrecht
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