The Chesapeake Oyster and the Rise and Fall of the Bay's Economy

In the eighteen eighties, the Chesapeake Bay yielded about twenty million bushels of oysters a year. That number is difficult to comprehend without some context. The entire modern American oyster industry, from Maine to Washington State, harvests roughly forty to fifty million pounds per year today. In those years the bay was pulling in a volume of shellfish that supplied canneries, restaurants, and oyster bars from Baltimore to Boston to London. The bay was the most productive oyster fishery on earth.

The oyster built a working culture that was unlike anything else in American coastal life. The skipjack fleet, flat-bottomed sailing vessels designed specifically for dredging oyster beds in shallow water, was the last commercial sailing fleet to operate in the United States. Watermen tended their beds with the same close territorial knowledge that farmers applied to land, knowing which particular stretch of bottom yielded well in a cold spring, which bed was overharvested and needed rest, which creek mouth produced a sweeter oyster than the open water to the east.

The harvest did not last. By the eighteen nineties the beds were showing stress. By the early twentieth century they were collapsing. The causes were multiple and interacting: overharvesting by an industrial fleet that had converted from sail to steam-powered dredging vessels; disease introduced partly by the importation of Pacific oyster seed to replenish exhausted beds; runoff from the tobacco and grain fields that had expanded across the watershed since the seventeenth century; and the sewage of a rapidly growing Baltimore and its suburbs flowing into the bay with minimal treatment.

By the nineteen eighties, the oyster population had fallen to roughly one percent of its historic level. The oyster had filtered the entire volume of the Chesapeake Bay in a matter of days at the height of its abundance. At one percent of that population, filtration collapsed and the bay began to cloud with algae. The loss of the oyster was both an economic catastrophe and an ecological one. Restoration projects are underway. The timeline for recovery is measured in decades.