The distribution of glochidia of the Swan mussel, Anodonta cygnea (Mollusca) on the Three‐spined stickleback Gasterosteus aculeatus (Pisces)

Abstract

The pattern of infestation by glochidia of the Swan mussel, Anodonta cygnea , on a population of the Three‐spined stickleback, Gasterosteus aculeatus was studied over a period of 12 months. The results obtained are considered under the four headings of incidence, intensity, the effect of fish size and the toDoeraDhical distribution of oarasites on the host.