Resistance patterns to salinity and temperature in an estuarine mysid ( Mysidopsis bahia) in relation to its life cycle

Survival of the estuarine mysid Mysidopsis bahia was monitored in the laboratory from juvenile through maturation to an adult under various combinations of salinity (3–31 % 0 S) and temperature (19–31°C). Salinity had a greater influence on mysid survival than did temperature. Salinity tolerance was strongly modified by temperature with maximum tolerance at intermediate temperatures. Salinity-temperature interactions on mysid survival varied with age of the mysid. Canonical analysis of weekly resistance patterns produced absolute maximum survival combinations for salinity and temperature which changed over time. The salinity-temperature tolerance ranges described for this estuarine mysid correspond with previously described physiological capabilities and distribution patterns.