Virginia Institute of Marine Science
Proceedings of the National Shellfisheries Association
Virginia oystermen have tried trapping of drills as a control measure and discarded it as ineffective and too costly. It is true that their efforts were sporadic and lacking in persistence, and the effects of their trapping were not adequately appraised. They expected returns in the form of increased yields too quickly. Nevertheless, these brief trials have convinced even the most progressive oystermen that trapping· drills is not the answer to their predation problem. In Chesapeake Bay, consequently, no conscious effort is made to control drills. Oyster grounds are often allowed to lie fallow for several year's, a practice which may decrease the drill population if the grounds are properly cleaned, but the reasons behind this rotation are vague and usually associated with the character of the bottom. To regulate drills oystermen have been urging the development of chemical controls and mechanical dredges.
Andrews, Jay D., Trapping Oyster Drills In Virginia I. The Effect Of Migration And Other Factors On The Catch (1955). Proceedings of the National Shellfisheries Association, 46, 140-154.