Bioaccumulation of chromium and its effects on reproduction in Neanthes arenaceodentata (polychaeta) |
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| Authors: | Philip S Oshida Lucinda S Word |
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| Institution: | Southern California Coastal Water Research Project, 646 West Pacific Coast Highway, Long Beach, California 90806, USA |
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| Abstract: | The levels of hexavalent chromium (Cr VI) that caused diminished reproductive ability in the polychaete Neanthes arenaceodentata were determined. Changes in numbers of offspring and time of spawning caused by Cr VI at 1 to 38 ug/litre during two generations of exposure (309 days) were measured. Time to spawning was unaffected but it was found that reductions in numbers of offsprings occurred at 16 to 38 μl/litre. Bioaccumulation of chromium was also measured and found to be proportional to exposure levels; however, a direct relationship between tissue concentration and reduced numbers of offspring could not be established. |
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