Experimentally determined incipient physiological tolerance limits under laboratory conditions for adult and juvenile <i>Pomacea insularum</i> collected in Texas (from Ramakrishnan [31]).

<p>For salinity and pH the ranges of values bracket the median lethal values at 28 days exposure (LD<sub>50</sub>/28). Temperature limits were statistically calculated from experimental data to yield the temperatures at which 99% mortality occurred in 28 days (LTp<sub>99</sub>). Emersion values are the maximum observed survival time of the snail out of water at the stated temperature and humidity.</p>