Spawning in a threatened freshwater mussel shifts to earlier dates as a result of increasing summer mortality.

The overall difference between spawning and death dates in reference to the first spawning date in given river were highly significant: the Md of 1st spawns occurred on 26th day since the first spawn, whereas the Md date of death date was 42 days later (GLMM no. 2: estimate = -0.85, SE = 0.061, P < < 0.001).

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