Abstract
We evaluated the mixed effect of changes in salinity and cadmium exposure on the physiological responses of Isognomon alatus, considered as potential biomonitoring species for its abundance and resistance to salinity changes, temperature and pH. Two hundred individuals were taken to the laboratory and acclimated for one month at salinities of 36, 27 and 18 UPS. In each experiment we used two salt shocks and a salinity control. To determine the effect of cadmium the experiment was performed once with free water and then with metals at a non-lethal concentration of 1 μg/L of cadmium chloride. We evaluated the differences in physiological responses based on filtration rates, respiration and ammonia excretion between controls and groups receiving saline shocks. We found differences both in the individual effect of saline shocks and in the exposure to cadmium; we also found an important synergistic effect, which led us to conclude that the species response as biomonitor depends on the conditions of salinity and ecosystem dynamics. © 2016. Acad. Colomb. Cienc. Ex. Fis. Nat. All rights reserved.References
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