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Table 4. (continued) <br />EcosysteW, species, arsenic Arsenic Effect Referenceb <br />compound , and other concentration <br />variables <br />As +3 0.33 mg/l LC-50 (96 hours) <br /> for embryos. 3 <br />AmerlrSan oyster, Crassostrea virginica <br />As (eggs) 7.5 mg/l LC-50 (48 hours). 8 <br />CopeW, Eurytemora affinis <br />As <br />5 0.025 mg/l No effect. 12 <br />+ <br />As 0.1 mg/l Reduced juvenile <br /> <br />+5 survival. 12 <br />As 1 mg/1 Reduced adult <br /> survival. 12 <br />5Macoma balthica <br />Clam 4 <br />- <br />Water temperature, 0C <br />5 220 mg/l LC-50 (192 hours). 11 <br />10 60 mg/l LC-50 (192 hours). 11 <br />15 15 mg/l LC-50 (192 hours). 11 <br />Mysi13 Mysidoosis bahia <br /> <br />As +5 <br />0.63 to 1.27 mg/l c <br />MATC <br />3 <br />As 2.3 mg/l LC-50 (96 hours). 3 <br />Blue <br />Tussel, Mytilus edulis <br />+ <br />As 16 mg/l Lethal in 3 to <br /> 16 days. 8 <br />Mud ?2ail, Nassarius obsoletus <br />As 2 mg/l Depressed oxygen <br /> consumption in <br /> 72 hours. 8 <br />Oligochaete annelid, <br />Tub' ex costatus <br />As <br />Water temperature, 0C <br />5 500 mg/l LC-50 (130 hours). 11 <br />10 500 mg/l LC-50 (115 hours). 11 <br />15 500 mg/l LC-50 (85 hours). 11 <br />MARINE VERTEBRATES <br />Grey Au llet, Chelon labrosus <br />As 27.3 mg/l LC-50 (96 hours); <br /> some skin dis- <br /> coloration. 13 <br />51