Assessing the toxic threat of selenium to fish and aquatic birds
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چکیده
منابع مشابه
Assessing the toxic threat of selenium to fish and aquatic birds.
A procedure is given for evaluating the toxic threat of selenium to fish and wildlife. Toxic threat is expressed as hazard, and is based on the potential for food-chain bioaccumulation and reproductive impairment in fish and aquatic birds, which are the most sensitive biological responses for estimating ecosystem-level impacts of selenium contamination. Five degrees of hazard are possible depen...
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There are several manners in which selenium may express its toxicity: (1) an important mechanism appears to involve the formation of CH(3)Se(minus sign) which either enters a redox cycle and generates superoxide and oxidative stress, or forms free radicals that bind to and inhibit important enzymes and proteins. (2) Excess selenium as selenocysteine results in inhibition of selenium methylation...
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ژورنال
عنوان ژورنال: Environmental Monitoring and Assessment
سال: 1996
ISSN: 0167-6369,1573-2959
DOI: 10.1007/bf00399568