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- W1994874642 abstract "Acute toxicity tests were performed on field-collected copepods (Microarthridion littorale) using the sediment-associated polychlorinated biphenyl (PCB) Aroclor 1254 (i.e., PCB concentrations in bulk sediments in the bound and/or unbound states). Three replicates of 50 adult copepods (25 males + 25 females) were exposed to five levels of PCB-contaminated sediments for 96 h and compared to untreated controls and solvent controls. LC50 concentrations were nearly twice as high for females (251 mg/kg) as for males (117 mg/kg). To determine the effects of the PCB on reproductive output of the copepods, copulating pairs of Microarthridion littorale were allowed to reproduce in concentrations of Aroclor 1254-contaminated sediments below LC50 values. Two experimental trials with 10 and 15 replicates, each with one pair of Microarthridion littorale in copu-lus, were conducted for 12 d, the normal time needed for females to produce one set of nauplii and carry a second clutch of eggs. In both experiments, a significant decrease in number of nauplii was found with Aroclor contamination. Although NOECs were not determined, high concentrations (83 mg/kg) of the sediment-associated Aroclor 1254 were required to affect mortality significantly, whereas lower levels (4 mg/kg) impaired reproduction." @default.
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- W1994874642 date "1993-10-01" @default.
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- W1994874642 title "Lethal and sublethal effects of the sediment-associated PCB aroclor 1254 on a meiobenthic copepod" @default.
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- W1994874642 doi "https://doi.org/10.1002/etc.5620121017" @default.
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