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来源：百度知道 编辑：UC知道 时间：2024/05/25 07:35:41
On the other hand, rainbow trout and brown trout appear more resistant to fluoride than freshwater benthic macroinvertebrates. Camargo and Tarazona (1990) have estimated 96 hour LCs0 values in soft water of 26.3,26.5, 38.5, 48.2 and 44.9 ppm F- for Hydropsyche bulbifera, H. exocellata, H. pellucidula, H. lobata and Chimarra marginata larvae, respectively. This lower sensitivity of trout species to fluoride could be explained because fluoride ions may form stable complexes with calcium in blood and bone of fish (Sigler and Neuhold,1972), whereas stable complexes could not be formed in freshwater insect larvae. However, marine invertebrates exposed to fluoride compounds tend to accumulate fluoride in their exoskeleton during chronic exposures (Wright and Davidson, 1975).
Maximum safe criteria of fluoride ion for fish in natural ecosystems have not yet been determined (USEPA,1986) because a range of widely LCs0 values has been reported (Smith et al., 1985). However, it is evident tha

On the other hand, rainbow trout and brown trout appear more resistant to fluoride than freshwater benthic macroinvertebrates. Camargo and Tarazona (1990) have estimated 96 hour LCs0 values in soft water of 26.3,26.5, 38.5, 48.2 and 44.9 ppm F- for Hydropsyche bulbifera, H. exocellata, H. pellucidula, H. lobata and Chimarra marginata larvae, respectively. This lower sensitivity of trout species to fluoride could be explained because fluoride ions may form stable complexes with calcium in blood and bone of fish (Sigler and Neuhold,1972), whereas stable complexes could not be formed in freshwater insect larvae. However, marine invertebrates exposed to fluoride compounds tend to accumulate fluoride in their exoskeleton during chronic exposures (Wright and Davidson, 1975).
另一方面，虹鳟鱼和褐鳟比海底大型无脊椎动物抵抗氟化物的能力似乎更强。Camargo和Tarazona估计，在软水中的F离子浓度对Hydropsyche的这四个种的幼体的96小时的LCs0值分别为26.3，26.5，38.5，48.2。这里显示这些鳟鱼对氟化物的敏感性较低，原因可以解释为负离子可能在血液里和在骨骼里形成稳定的复合物，然而这种稳定的复合物在淡水昆虫幼虫里不能形成。不过，在长期暴露在氟化物的情况下，海洋无脊椎