The Tidal Bass Survey team began systematically collecting data on the distribution of largemouth bass (Micropterus salmoides) in the 1980's. These early surveys were conducted in the Potomac River. In 1999, the survey methods were standardized among rivers. The rivers with the longest data sets include the Potomac River and the Choptank River. The survey now includes the Patuxent River, the Upper Bay region, the Chester River, the Nanticoke River, and the Wicomico River.
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