Caridina multidentata Stimpson 1860

3.2. Thermal tolerance and acclimation capacity assessment of Caridina multidentata The CTMax values for C. multidentata acclimated at temperatures ranging from 14 ◦ C to 32 ◦ C gradually increased from 31.5 ◦ C to 40.1 ◦ C, corresponding to an increase of around 2.4 ◦ C in CTMax for each 5 ◦ C increase in acclimation temperature (Fig. 3). The calculated thermal safety margin ranges from 17 ◦ C (14 ◦ C-acclimated specimens) to 8 ◦ C (32 ◦ C-acclimated specimens). 3.3. Survival of Caridina multidentata at different acclimation temperatures Survival of C. multidentata was 96–100 % after 1 month of acclimation at temperatures ranging from 14 ◦ C to 32 ◦ C (Fig. 1B). After this one-month period, the CTMax experiments were carried out. Among the specimens subjected to CTM experiments, 3 out of 10 died the day after testing for the acclimation temperatures of 29 ◦ C and 32 ◦ C (this mortality is included in the monitoring of survival shown in Fig. 1B). Survival subsequently decreased in the following weeks to 74 % for the batch acclimated at 32 ◦ C, and 83 % for the batches acclimated at 14 ◦ C and 29 ◦ C. Survival rates for the other batches (17 ◦ C–26 ◦ C) remained between 92 % and 100 % during the 3 months of monitoring at the final acclimation temperature.