Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6326462 | Science of The Total Environment | 2015 | 6 Pages |
Abstract
Following the use of rotenone to eradicate invasive pest fish, a dynamic first-order kinetic model is usually used to determine the half-life and rate at which rotenone dissipated from the treated waterbody. In this study, we investigate the use of a stochastic gamma model for determining the half-life and rate at which rotenone dissipates from waterbodies. The first-order kinetic and gamma models produced similar values for the half-life (4.45Â days and 5.33Â days respectively) and days to complete dissipation (51.2Â days and 52.48Â days respectively). However, the gamma model fitted the data better and was more flexible than the first-order kinetic model, allowing us to use covariates and to predict a possible range for the half-life of rotenone. These benefits are particularly important when examining the influence that different environmental factors have on rotenone dissipation and when trying to predict the rate at which rotenone will dissipate during future operations. We therefore recommend that in future the gamma distribution model is used when calculating the half-life of rotenone in preference to the dynamic first-order kinetics model.
Keywords
Related Topics
Life Sciences
Environmental Science
Environmental Chemistry
Authors
Maheswaran Rohan, Alastair Fairweather, Natasha Grainger,