Sticklebacks from Greenland

Greenland freshwater sticklebacks Gasterosteus aculeatus were low‐plated. Length distribution of 1 + and 2+ fish peaked at 33 and 46 mm, in early July. Pre‐reproductive fish including 1 + fish were infected with Schistocephalus solidus . The diet consisted of chironomid larvae and pupae. Infected individuals ate smaller prey than non‐infected ones, on one occasion where competition for food was likely to occur. Infected fish had lower stomach fullness, and the parasite compressed the stomach in heavily infected fish. The other fish species was charr, and the stickleback seemed to occupy a wide range of habitats.