Sublethal effects of oiled sediment on the sand worm, Nereis (neanthes) virens: Induced changes in burrowing and emergence |
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| Authors: | Bori L Olla Allen J Bejda Anne L Studholme Walter H Pearson |
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| Institution: | College of Oceanography, Oregon State University, Marine Science Center, Newport, Oregon 97365, USA;US Department of Commerce, National Oceanic and Atmospheric Administration, Sandy Hook Laboratory, Highlands, New Jersey 07732, USA;Battelle, Pacific Northwest Laboratories, Marine Research Laboratory, 439 West Sequim Bay Road, Sequim, Washington 98382, USA |
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| Abstract: | The burrowing and emergence behavior of sand worms, Nereis (Neanthes) virens Sars, in sediment contaminated with sublethal concentrations of Prudhoe Bay crude oil ranging from 74 to 5222 ppm, was studied in the laboratory. Initial burrowing in oiled sediment did not differ from that observed in unoiled sediment. Emergence of exposed worms was related to the oil concentration and the extent of weathering of oiled sediment. Sand worms buried in unoiled sediment did not emerge. Worms dug from oiled sediment after 12 hours' exposure and placed on unoiled sediment were impaired, resulting in a significant increase in time to burrow. However, after 12h, they recovered and burrowed at normal rates. Worms held in oiled sediment for 96 h also recovered. Possible causes for recovery are discussed. Results suggest that oil-induced aberrations may increase vulnerability to predation. |
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