The effects of hydrocarbons on the setting of the American oyster,Crassostrea virginica,in intertidal habitats in Southeastern North Carolina |
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| Authors: | Craig M Smith Courtney T Hackney |
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| Institution: | 1. Department of Biological Sciences, The University of North Carolina at Wilmington, 28403, Wilmington, North Carolina
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| Abstract: | Effects of petroleum covered substrate on intertidal oyster spat (Crassostrea virginica) set were measured at three intertidal elevations in a southeastern North Carolina estuary.Mercenaria mercenaria shells were coated with Bunker C crude oil or a 40∶1 mixture of gasoline: 2-cycle engine oil and placed intertidally for seven 13-d periods. Spat densities were significantly lower on oil treatments versus control and gas-treated shells in the high intertidal zone. This was principally attributed to an increased sediment coat on oiled shells. Maximum spat size was smaller on oil-treated shells at all elevations when compared to gas and control shells, indicating that setting may be delayed on oiled shell. For all experimental 13-d periods in the low intertidal zone and for three periods in the mid-tidal zone, barnacle densities (primarilyBalanus improvisus andB. eburneus) were significantly greater on oiled shells than on control shells. |
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