The Effects of Mercury, Silver and Copper on the Survival and Growth of Crepidula Fornicata Larvae
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Authors
Nelson, William George
Issue Date
1978-08-28
Type
Thesis
Language
en_US
Keywords
Crepidula fornicata , Larvae , Toxicology , Mercury , Silver , Copper
Alternative Title
Abstract
The toxicities of mercury, silver, and copper to Crepidula fornicata larvae were investigated. Larvae were exposed to various concentrations of each metal under static conditions, temperature 23⁰ ± 2⁰ C and 2% salinity, for a period of 12 days. The decreasing order of toxicity determined from these tests was Hg>Ag>Cu with values of lethal concentration producing 50% mortality (LC50) as follows: 13.5, 22.0, and 32 parts per billion (ppb), respectively. Median effective times required to produce 50% mortality (ET50) and growth determinations, as percent-growth of controls, were also recorded for each concentration of the three metals tested. A significant difference (p<0.05) in growth was determined for the three metals with silver-exposed larvae exhibiting the best growth of the metals tested followed by copper and mercury. Crepidula fornicata larvae proved, in this study, to be an advantageous organism for use in heavy metal pollution investigations, and the continued use of this species is recommended in future studies.
Description
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Citation
W. Nelson, "The Effects of Mercury, Silver and Copper on the Survival and Growth of Crepidula Fornicata Larvae", MS dissertation, School of Arts & Sciences, Univ. of Bridgeport, Bridgeport, CT, 1978.