Substrate selection and assortative mating in Gammarus pulex L. Article Received: 10 May 1982 Revised: 10 June 1982 Accepted: 20 July 1982 DOI:
Cite this article as: Thompson, D.J. & Moule, S.J. Hydrobiologia (1983) 99: 3. doi:10.1007/BF00013711 Abstract
We reject the published proposition that assortative mating for size in
Gammarus is brought about purely as a result of spatial heterogeneity in substrate particle size.
We confirm that, in general, large
Gammarus prefer substrates with larger particle size than small Gammarus. However, in artificial streams in the laboratory, in choice experiments Gammarus males and females showed positive assortative mating for size in each of three substrates differing in mean particle size.
We propose an explanation for assortative mating based on sexual selection.
Keywords substrate selection assortative mating Gammarus References
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