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| The locations of oyster reefs in the Galveston Bay area are limited by salinity - they require moderate levels as can be seen from this map showing the average surface salinity for 1965-67 (as expressed in thousands of parts per million). The oyster reefs, which appear in black, are found in the mid-bay areas as the heads of the bays are too fresh and the areas near the mouth of the bay and passes are too salty. The red triangle marks the location of the Mitchell Ridge site. Adapted from Fisher et al. 1972. |