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Evaluation of Biotic and Treatment Factors Relaying to Bacterial Control of Zebra Mussels

Description: Testing over the last quarter has indicated the following regarding control of zebra mussels with bacterium Pseudomonas fluorescens strain CL0145A: (1) the concentration of bacteria suspended in water is directly correlated with mussel kill; (2) the ratio of bacterial mass per mussel, if too low, could limit mussel kill; a treatment must be done at a high enough ratio so that mussels do not deplete all the suspended bacteria before the end of the desired exposure period; (3) bacteria appear to … more
Date: April 30, 2002
Creator: Molloy, Daniel P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

IMPACT OF WATER TEMPERATURE ON ZEBRA MUSSEL MORTALITY

Description: These tests conducted this past quarter have indicated that the bacterium Pseudomonas fluorescens strain CL0145A is effective at killing zebra mussels at water temperatures ranging from 7 to 23 C. Percent kill will likely be somewhat lower at very low temperatures, e.g., 7 C, but even at such low temperatures high mussel kill can still be achieved (>70% kill). This is significant because the development of a zebra mussel control method that is efficacious in such a wide range of temperatures… more
Date: August 7, 2002
Creator: Molloy, Daniel P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Impact of the Duration of Bacterial Exposure on Zebra Mussel Mortality

Description: These tests indicated that: (1) duration of exposure to bacterial strain CL0145A of Pseudomonas fluorescens is a key variable in obtaining zebra mussel mortality; (2) that given a choice of exposure periods up to 96 hr, the longer the exposure period, the higher the mean mortality that will be achieved; (3) that the first few hours that the mussels are exposed to the bacteria are the most important in achieving kill; (4) that the mortality achieved by exposure periods {>=}72 hr may be somewhat … more
Date: January 21, 2002
Creator: Molloy, Daniel P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Impact of Water pH on Zebra Mussel Mortality

Description: The experiments conducted this past quarter have suggested that the bacterium Pseudomonas fluorescens strain CL0145A is effective at killing zebra mussels throughout the entire range of pH values tested (7.2 to 8.6). Highest mortality was achieved at pH values characteristic of preferred zebra mussel waterbodies, i.e., hard waters with a range of 7.8 to 8.6. In all water types tested, however, ranging from very soft to very hard, considerable mussel kill was achieved (83 to 99% mean mortality),… more
Date: October 15, 2002
Creator: Molloy, Daniel P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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