Like in foregoing years, the dispersal of G. tigrinus was followed. It appeared that after an apparent standstill in the previous years G. tigrinus is explosively expanding its range again. For the first time it was found in the rivers Rhine and Meuse and its affluents. Crangonyx pseudogracilis has stabilized its position in the province of Groningen. Some remarks are made on the isopod Proasellus coxalis.

Bulletin Zoologisch Museum

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Naturalis journals & series

Platvoet, D., & Pinkster, S. (1985). The present position of the alien Amphipods Gammarus tigrinus and Crangonyx pseudogracilis in the Netherlands (Crustacea, Amphipoda). Bulletin Zoologisch Museum, 10(16), 125–128.