Okadaic acid depuration in the mussel Mytilus galloprovincialis:: one- and two-compartment models and the effect of environmental conditions
Okadaic acid depuration in the mussel Mytilus galloprovincialis:: one- and two-compartment models and the effect of environmental conditions
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DOI：
10.3354/meps176153
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发表时间：
1999-01-01
影响因子：
2.5
通讯作者：
Moroño, A
中科院分区：
文献类型：
--
作者：
Blanco, J;Fernández, ML;Moroño, A
腹泻性贝类中毒（DSP）的事件发生在贻贝Mytilus galloprovincialis从Ria de Pontevedra（加利西亚，西班牙西北部），由甲藻属（甲藻）的生物体产生，一批受污染的贻贝被移植到几个未受污染的网站具有不同的环境条件。在70 d期间，在每个实验贻贝批次中的冈田酸（事件中涉及的主要毒素）的净化动力学进行了监测，作为相应的盐度，温度，荧光，透光率和贻贝体重。主成分分析和多元回归分析表明，环境条件和体重对净化率有影响。虽然大多数研究的变量表现出高度的协变，荧光和光传输，这是用来衡量贻贝的固体和浮游植物的可用性，似乎有最突出的净化效果。为了描述净化动力学，测试了四种不同的模型：1室和2室模型，各有2个版本，包括和不包括研究的4个环境变量和体重的影响。不含补充变量的1室模型未给出动力学的适当描述，但当纳入这些变量时，一般拟合良好，并且在最重要的偏离中发现了模式。拟合的最简单的2室模型也产生了充分描述观察到的动力学的输出。然而，尝试估计包括补充变量的二室模型的参数一致地产生了一室模型。选择的模型来描述净化动力学的环境变量的影响的估计有很大的影响。
Following an episode of Diarrhetic Shellfish Poisoning (DSP) in mussels Mytilus galloprovincialis from the Ria de Pontevedra (Galicia, NW Spain), produced by organisms of the genus Dinophysis (dinoflagellate), a batch of contaminated mussels was transplanted to several uncontaminated sites having different environmental conditions. The depuration kinetics of okadaic acid (the dominant toxin involved in the episode) in each experimental mussel batch was monitored during a 70 d period, as were the corresponding salinity, temperature, fluorescence, light transmission and mussel body weight. Environmental conditions and body weight were shown to have an effect on depuration rates by principal component and multiple regression analysis. Although most of the variables studied showed a high degree of covariation, fluorescence and Light transmission, which serve to measure the availability of solids and phytoplankton for mussels, appeared to have the most prominent effect on depuration. Four different models were tested in order to describe depuration kinetics: 1- and 2-compartment models, each in 2 versions, with and without the inclusion of the effects of the 4 environmental variables studied and body weight. The 1-compartment model without the complementary variables did not give an appropriate description of the kinetics, but when these variables were included, the general fitting was good and a pattern was found in the most important deviations. The simplest of the 2-compartment models fitted also produced an output that adequately described the kinetics observed. However, attempts to estimate the parameters of 2-compartment models including the complementary variables consistently produced a 1-compartment model. The model chosen to describe depuration kinetics substantially influences the estimation of the effect of the environmental variables.