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The behavior did not differ significally between the ecotypes. Neither did the behavior before and after the addition of chemical cues from predators in all cases exccept one.

Predation of damselfly larvae increased the mean length of the stonewort ecotype in reed substrate significally. The perch decreased the reed ecotype's mean length significally in the stonewort substrate.

The table below are a summary of the result on size.

+ Size increased
O No difference in size
- Size decreased