“…In Corbicula fluminea, a freshwater ovoviviparous hermaphroditic species, release of juveniles begins when temperature rises above 18 to lg°C, but declines when temperatures rise above 26°C (McMahon 1983). In C. japonica, a brackish-water oviparous dioecious species, spawning began at temperatures above 22"C, and inhibition of spawning by high temperature was not observed (Figs.…”