, Volume 99, Issue 1, pp 3–6

Substrate selection and assortative mating in Gammarus pulex L.

  • David J. Thompson
  • Sara J. Moule

DOI: 10.1007/BF00013711

Cite this article as:
Thompson, D.J. & Moule, S.J. Hydrobiologia (1983) 99: 3. doi:10.1007/BF00013711


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.


substrate selection assortative mating Gammarus 

Copyright information

© Dr W. Junk Publishers 1983

Authors and Affiliations

  • David J. Thompson
    • 1
  • Sara J. Moule
    • 1
  1. 1.Department of ZoologyThe UniversityLiverpoolU.K.

Personalised recommendations