The behavior, measured in activity, did not differ between the ecotypes. This makes it possible to conclude that the predators do not affect a difference in behavior as the difference isn't there.

Other studies that has shown that there is a diffrence in behavior between the ecotypes. Though these studies were done on isopods from Lake Krankesjön. The result from this thesis indicates that there may be a difference between ecotypes in different lakes.

In their original substrate the predators affect the size of the non-native ecotype in a way that drives it towards the size of the native ecotype. This size pattern, with large individuals in among the reed habitat and smaller in more open water, is not only limited to the freshwater isopod. It can be seen with different species where the large species lives among the emerge macrophytes and the smaller in more open water. This thesis supports the theory that this pattern is, at least partly, caused by predators.