Pinna nobilis in suboptimal environments are more tolerant to disease but more vulnerable to severe weather phenomena

We examined a disease outbreak of the fan mussel, Pinna nobilis (L.), in Alfacs Bay (South Ebro Delta, Spain) during period two years three zones exposed to summer salinity gradient resulting from agricultural freshwater discharges and distance open sea. Long-term monitoring was also conducted Fangar (North Delta), featuring lower salinities no evidence disease. Results showed that (37.4–35.7) associated cumulative mortality (100% near mouth, 43% middle regions, 13% inner regions), thus hindering spread pathogens. Young specimens be more tolerant than large adults but become vulnerable over time. In Bay, (30.5–33.5) prevented individuals were highly Storm Gloria which caused 60% 3 weeks, ~100% 6 weeks.