期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 53, 期 2, 页码 752-759出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.8b04382
关键词
-
资金
- European Chemical Industry Council Long-Range Research Initiative
This study describes the development and evaluation of a new bioenergetically balanced bioaccumulation (3B) model for organic chemicals in fish. The 3B model is developed from a large database of routine metabolic (oxygen consumption) rates composed of a range of species, body mass, and temperatures. The chemical uptake and elimination rates of the 3B model are compared against those from three existing bioaccumulation models. A time-variant version of the 3B model is evaluated against measured concentrations of five polychlorinated biphenyls in different-size fish depurated over the course of a year, during which water temperature changed by 22 degrees C. The generic species 3B model predicts fish concentrations to within a factor of 3 of the measured data for the majority of observations (n = 438) and outperforms a previously published species-specific bioenergetics model. Bioenergetics aspects of the 3B model are further evaluated by comparing predicted feeding rates and growth rates to measured rates obtained from diverse laboratory conditions (n 572). While bioenergetics performance is acceptable, the 3B model seems to generally perform better when ingestion rates are calculated from growth rates rather than vice versa. For field applications, parametrization of the activity multiplier remains a key uncertainty underlying the bioenergetics calculations.
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