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Starvation effects on dry tissue and shell biomass were investigated in the zebra mussel, Dreissena polymorpha, at 5, 15, and 25?C. Subsamples of 30 individuals were examined daily for mortality. A second group was periodically randomly subsampled for dry tissue and shell weights. Extensive starvation tolerance in D. POLYMORPHA is associated with ability to greatly reduce metabolic demand. As this capacity is maximized at low temperatures, mussels may survive winter months with minimal energy store reduction. Extensive tolerance makes starvation impractical for mitigation of D. POLYMORPHA fouling.
This report presents results of a study comparing the desiccation tolerance of D. gugensis and D. polimorpha, allowing analysis of the potential for dewatering to be an effective, nonchemical mitigation technology for both species. The results are also utilized to relate desiccation tolerance to differences in the depth distributions of the two species.
This study was undertaken to more fully detail the anoxio tolerance of both D. POLYMORPHA and C. FLUMINEA at different experimental and acclimation temperatures. The results are discussed in relation to both species' depth distributions and the efficacy of anoxia as a control strategy.