The uptake and accumulation of Ni by <em>Cerastoderma edule</em> and its effect on mortality,body condition and respiration rate期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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*The uptake and accumulation of Ni by Cerastoderma edule* and its effect on mortality,body condition and respiration rate**

Authors:	James G Wilson

Institution:	Environmental Sciences Unit, Trinity College Dublin, Dublin 2, Ireland

Abstract:	The concentration of Ni in C. edule ranges from 17·8 μg/g to 53·82 μg/g with the highest concentration in the gills and mantle and the lowest in the foot and adductor muscles. The concentration does not change with either size or season.There is no significant increase in mortality even in the highest Ni concentration (100 μg/litre), nor is body condition correlated with experimental Ni concentrations. The rate of uptake of Ni (y) is described by the equation: $y=?16·903+11·674x_{1} +0·437x_{2}$ where x₁ = Ni concentration (μg/litre) and x₂ = time (h).The respiration rates did not significantly change up to the highest Ni concentration used (1000 μg/litre).It is postulated that the main pathway for Ni uptake is through the gills, possibly through mucus sheet or transmembrane absorption, with a secondary uptake route via the viscera.C. edule may therefore be a suitable indicator species for Ni.

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