Mate discrimination in Littorina littorea (L.) and L. saxatilis (Olivi) (Mollusca: Prosobranchia)
The ability of males of Littorina littorea and L. saxatilis to discriminate between mates of different sex, species and size was examined. In partner choice experiments males of L. littorea had the possibility to initiate a copulation with either a female or a male. The males did not show a preference for either sex. There was therefore no evidence that they could determine the sex of a conspecific prior to copulation. The duration of intrasexual copulation was considerably shorter than for intersexual copulation, both in the field and in laboratory experiments. For the two species, intersexual copulations were far more frequent than intrasexual ones. This can partly be explained by the difference in copulation time.
Few interspecific conpulating pairs were found on the shore. This may reflect a low interspecific encounter rate rather than a mechanism of species recognition. On all of these occasions, however, the active male was of L. saxatilis. It is argued that selection against precopulatory species and sex recognition is a more likely explanation than an hypothesis that states that the required mutations for precopulatory mate identification has not yet occurred.
L. Littorea males copulated longer with large than with small females. Copulation time was short with parasitized females. Which are sterile or of low fecundity. The allocation of mating effort by males is discussed.
Key wordsmating behaviour copulation duration interspecific copulation intrasexual copulation
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- Cate, J. M., 1968. Mating behavior in Min-ia idae Melvill, 1893. Veliger 10: 247–252.Google Scholar
- Dinter, I. & P. J. Manos, 1972. Evidence for a pheromone in the marine periwinkle Littorina littorea Linnaeus. Veliger 15: 45–47.Google Scholar
- Edwards, D. C., 1968. Reproduction in Oliviella biplicata. Veliger 10: 297–304.Google Scholar
- Fretter, V. & A. Graham, 1962. British prosobranch molluscs. Ray Society, London, 755 pp.Google Scholar
- Gibson, D. G., 1965. Mating behavior in Littorina planaxis Philippi (Gastropoda: Prosobranchiata). Veliger 7: 134–139.Google Scholar
- 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.Google Scholar
- Janson, K., 1985. Variation in the occurence of abnormal embryos in females of the intertidal gastropod Littorina saxatilis Olivi. J. moll. Stud. 51: 64–68.Google Scholar
- Knowlton, N. & S. R. Greenwell, 1984. Male sperm competition avoidance mechanisms: The influence of female interests. In R. L. Smith (ed.), Sperm competition and the evolution of animal mating systems. Academic Press, Orlando (Florida): 62–83.Google Scholar
- Parker, G. A., 1978. Searching for mates. In J. R. Krebs & N. B. Davies (eds), Behavioural ecology an evolutionary approach. Blackwell Scientific Publications, Oxford: 214–244.Google Scholar
- Peters, R. S., 1962. Function of the cephalic tentacles in Littorina Philippi (Gastropoda: Prosobranchiata). Veliger 7: 143–148.Google Scholar
- Raffaelli, D. G., 1977. Observations of the copulatory behavior of Littorina rudis Maton and Littorina nigrolineata Gray ( Gastropoda: Prosobranchia). Veliger 20: 75–77.Google Scholar
- Struhsaker, J. W., 1966. Breeding, spawning periodicity and early development in the Hawaiian Littorina: L. pintado (Wood), L. picta Philippi and L. scabra (Linné) Proc. malac. Soc. Lond. 37: 137–166.Google Scholar