Responses to threat in a freshwater invader: longitudinal data reveal personality, habituation, and robustness to changing water temperatures in the "killer shrimp" <i>Dikerogammarus villosus</i> (Crustacea: Amphipoda).

2014 ), rptR ( Nakagawa and Schielzeth 2010) , and AICcmodavg ( Mazerolle 2014 ). Results Evaluation of the random effect structure ( Table 1 ) indicates that there might be significant among-individual variation in responses to a 5 °C change in temperature, with some individuals showing an increase in startle response duration and some showing a decrease as temperature increased.

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