Abstract
Two independent components of mating behaviour, sexual selection and assortative mating, were studied in two allopatric morphs, one sheltered boulder shore form (S-morph) and one exposed cliff shore form (E-morph), of Littorina saxatilis from the west coast of Sweden. Sexual selection was studied by comparing the sizes of copulating and non-copulating snails in the field. Size assortative mating was studied by collecting copulating pairs in the field, while assortative mating between morphs was investigated by bringing the pure morphs together in intermediary habitats and then noting the matings.
The S-morph mated randomly in relation to size in two of the studied populations and exhibited a trend towards size assortative mating in a third, while the E-morph showed size assortative mating in both studied populations. The microdistribution of sizes of snails on the shores could not explain all the size assortative mating found, and instead it is argued that a size-based mate rejection behaviour also contributes to the assortative mating in at least some of these populations. There was sexual selection on size in both males and females in the S-morph, with large individuals being favoured as mates. In contrast, copulating snails of the E-morph were smaller than non-copulating ones. The significantly different sexual selection intensities between the two morphs may help to explain the size differences between them. There was random mating between the E- and the S-morphs of L. saxatilis, which suggests no incipient reproductive isolation between morphs on Swedish rocky shores. This is in agreement with earlier studies of Swedish populations, but is in contrast to the situation found in other geographical areas.
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References
Anderson, W. W. & P. R. McGuire, 1978, Mating pattern and mating success of Drosophila pseudoobscura karyotypes in large experimental populations, Evolution 32: 416–423.
Coyne, J, A., 1992, Genetics and speciation. Nature 355: 511–515.
Crespi, B. J., 1989. Causes of assortative mating in arthropods. Anim. Behav. 38: 980–1000.
Efron, B., 1982. The Jacknife, the bootstrap and other resampling plans. Society for industrial and applied mathematics, Philadelphia, 92 pp.
Erlandsson, J. & K. Johannesson, 1994. Sexual selection on female size in a marine snail, Littorina littorea (L.). J. exp. mar. Biol, Ecol. 181: 145–157.
Erlandsson, J. & V. Kostylev, 1995, Trail following, speed and fractal dimension of movement in a marine prosobranch, Littorina littorea, during a mating and a non-mating season. Mar. Biol. 122:87–94.
Falconer, D. S., 1981. Introduction to quantitative genetics. Longman, London, 383 pp.
Gilbert, D. G. & W. T. Starmer, 1985. Statistics of sexual isolation. Evolution 39: 1380–1383.
Hughes, R. N. & P. Answer, 1982. Growth, spawning and trematode infection of Littorina littorea (L.) from an exposed shore in north Wales. J. moll. Stud. 48: 321–330.
Hull, S. L., J. Grahame & P. J. Mill, 1996. Morphological divergence and evidence for reproductive isolation in Littorina saxatilis (Olivi) in northeast England. J. moll. Stud. 62: 89–99.
Hull, S. L., 1998. Assortative mating between two distinct micro-allopatric populations of Littorina saxatilis (Olivi) on the northeast coast of England. Hydrobiologia 378: 79–88.
Janson, K., 1982. Phenotypic differentiation in Littorina saxatilis (Olivi) (Mollusca, Prosobranchia) in a small area on the Swedish west coast. J. moll. Stud. 48: 167–173.
Janson, K., 1983. Selection and migration in two distinct pheno-types of Littorina saxatilis in Sweden. Oecologia 59: 58–61.
Janson, K., 1985. Variation in the occurrence of abnormal embryos in females of the intertidal gastropod species Littorina saxatilis (Olivi). J. moll. Stud. 51: 64–68.
Janson, K. & P. Sundberg, 1983. Multivariate morphometric analysis of two varieties of Littorina saxatilis from the Swedish west coast. Mar, Biol. 74: 49–53.
Janson, K. & R. D. Ward, 1984. Microgeographic variation in al-lozyme and shell characters in Littorina saxatilis (Olivi) (Prosobranchia: Littorinidae). Biol. J. linn. Soc. 22: 289–307.
Johannesson, B. & K. Johannesson, 1996. Population differences in behaviour and morphology in the snail Littorina saxatilis: phenotypic plasticity or genetic differentiation? J. zool. Lond. 240: 475–493.
Johannesson, K. & P. Sundberg, 1992. Speciation in Littorina sax-atilis! A one-dimensional selection-migration model. In 1990 J. Grahame, P. J. Mill, D. G. Reid (eds), Proceedings of the Third International Symposium on Littorinid Biology. The Malacological Society of London: 1–8.
Johannesson, K. & A. Tatarenkov, 1997. Allozyme variation in a snail (Littorina saxatilis) — deconfounding the effects of micro-habitat and gene flow. Evolution 51: 402–409.
Johannesson, K., B. Johannesson & E. Rolan-Alvarez, 1993. Morphological differentiation and genetic cohesiveness over a micro-environmental gradient in the marine snail Littorina saxatilis. Evolution 47: 1770–1787.
Johannesson, K., E. Rolan-Alvarez & A. Ekendahl, 1995. Incipient reproductive isolation between two sympatric morphs of the intertidal snail Littorina saxatilis. Evolution 49: 1180–1190.
Manly, B. F. J., 1991. Randomization and Monte Carlo Methods in Biology. Chapman & Hall, London, 281 pp.
Merrel, D. J., 1950. Measurement of sexual isolation and selective mating. Evolution 4: 326–331.
Reid, D. G., 1996. Systematics and evolution of Littorina. Ray Society, London, 463 pp.
Ridley, M., 1983. The Explanation of Organic Diversity. The Comparative Method and Adaptations for Mating. Clarendon Press, Oxford, UK, 719 pp.
Rolán-Alvarez, E., C. Zapata & G. Alvarez, 1995a. Multilocus heterozygosity and sexual selection in a natural population of the marine snail Littorina mariae (Gastropoda: Prosobranchia). Heredity 75: 17–25.
Rolán-Alvarez, E., K. Johannesson, & A. Ekendahl, 1995b. Frequency-and density-dependent sexual selection in natural populations of Galician Littorina saxatilis (Olivi). Hydrobiologia 309: 167–172.
Santos, M., R. Tarrio, C. Zapata & G. Alvarez, 1986. Sexual selection on chromosomal polymorphism in Drosophila subobscura. Heredity 57: 161–169.
Saur, M., 1990. Mate discrimination in Littorina littorea (L.) and L. saxatilis (Olivi) (Mollusca: Prosobranchia). Hydrobiologia 193: 261–270.
Sokal, R. R. & R. J. Rohlf, 1995. Biometry. Freeman & Co., New York, 887 pp.
Spieth, H. T. & J. M. Ringo, 1983. Mating behavior and sexual isolation in Drosophila. In M. Ashburner, H. L. Carson & N. J. Thompson (eds), The Genetics and Biology of Drosophila, Vol 3c. Academic Press, London: 224–270.
Zaykin, D. V. & A. Pudovkin, A. 1993. Two programs to estimate significance of x 2 values using pseudo-probability tests. J. Hered. 84: 152.
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Erlandsson, J., Rolán-Alvarez, E. (1998). Sexual selection and assortative mating by size and their roles in the maintenance of a polymorphism in Swedish Littorina saxatilis populations. In: O’Riordan, R.M., Burnell, G.M., Davies, M.S., Ramsay, N.F. (eds) Aspects of Littorinid Biology. Developments in Hydrobiology, vol 133. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5336-2_8
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DOI: https://doi.org/10.1007/978-94-011-5336-2_8
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