https://scholars.lib.ntu.edu.tw/handle/123456789/448793
標題: | Bioenergetics-based matrix population modeling enhances life-cycle toxicity assessment of tilapia Oreochromis mossambicus exposed to arsenic | 作者: | CHUNG-MIN LIAO Chiang K.-C. Tsai J.-W. |
關鍵字: | Arsenic; Bioenergetics; Ecotoxicology; Life-cycle assessment; Matrix population model; Tilapia | 公開日期: | 2006 | 卷: | 21 | 期: | 2 | 起(迄)頁: | 154-165 | 來源出版物: | Environmental Toxicology | 摘要: | The objective of this study was to integrate a bioenergetics-based modeling approach into a population stage structure to enhance life-cycle toxicity assessments of the effects of waterborne arsenic (As) on the population dynamics of the tilapia Oreochromis mossambicus. The proposed mathematical model links a Leslie matrix population model and a universal ontogenetic growth model embedding the population-level growth rate and stage-specific modes of toxic action. We present data analyses of key parameters and distributions and discuss the processes of data capture and analysis and the impact of acute/chronic. As toxicity responses on population-level effects. We employed a three-parameter Hill equation model to describe the relationship between tilapia whole-body burden and mortality in order to estimate the probability of stage-specific vital rate of survival. Using the DEBtox theory, we distinguished three modes of toxic action (MOA): direct effects on growth and indirect effects via maintenance and food consumption on inhibition by arsenic of the growth of a tilapia population. The asymptotic population growth rate decreased from λ = 1.0027 for the control group to λ = 0.9935 for tilapia population exposed to 4 μg ml-1 As, indicating a potential risk of population intrinsic growth rates for tilapia exposed to higher levels of waterborne As. Our results estimated that an As concentration of 1.02 μg ml-1 would cause a 50% reduction in the tilapia population. We found that the interplay between external Stressors of waterborne As concentration and internally generated modes of action decreasing feeding in the juvenile stage and increasing the maintenance cost in the adult stage had a pronounced influence on the population stage structure of tilapia. © 2006 Wiley Periodicals. Inc. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/448793 | ISSN: | 1520-4081 | DOI: | 10.1002/tox.20169 | SDG/關鍵字: | Arsenic; Life cycle; Mathematical models; Toxicity; Bioenergetics; Ecotoxicology; Life-cycle assessment; Matrix population model; Fisheries; arsenic; arsenic; bioenergetics; food consumption; growth rate; inhibition; life cycle analysis; numerical model; population modeling; toxicity test; acute toxicity; animal experiment; arsenic poisoning; article; bioenergy; body burden; chronic toxicity; concentration response; controlled study; data analysis; ecotoxicology; energy cost; environmental exposure; food intake; life cycle; mathematical model; matrix population model; mortality; nonhuman; ontogeny; Oreochromis mossambicus; population growth; priority journal; stress; survival rate; theory; Tilapia; water pollutant; Animals; Arsenic; Body Weight; Energy Metabolism; Environmental Exposure; Fertility; Models, Biological; Population Dynamics; Tilapia; Toxicity Tests; Animalia; Oreochromis mossambicus; Tilapia |
顯示於: | 生物環境系統工程學系 |
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