Katama Bay oyster farms in Edgartown were closed this week after two people who ate oysters from the bay contracted Vibrio parahaemolyticus (Vp).

The Massachusetts Department of Public Health and the Department of Fish and Game, Division of Marine Fisheries announced the closure Monday.

Katama Bay oyster farms in Edgartown have been closed due to an outbreak of Vibrio parahaemolyticus (Vp), the Massachusetts Department of Public Health and the Department of Fish and Game, Division of Marine Fisheries announced Monday.

Part of the Tisbury Great Pond is about to become an oyster reef, thanks to a project sponsored by The Nature Conservancy and the towns of Chilmark and West Tisbury.

The propagation projects calls for putting down 100 cubic yards of sea clam shells as culch and then planting 250,000 juvenile oysters.

A plan for a large oyster farm in Lagoon Pond spurred debate in Oak Bluffs this week, with town officials weighing concerns about the location and effects of the proposed farm with the potential benefits of aquaculture. Brothers Dan and Greg Martino applied for an aquaculture license to start a four-acre oyster farm at the southern end of Lagoon Pond.

Bitterly cold temperatures in January kept the bay scallop fleet grounded for many days, but frozen ponds may provide future benefits to some shellfish, including scallops and oysters, Island marine biologists say.

Rick Karney, director of the Martha’s Vineyard Shellfish Group, said last week that a drop in water temperature in saltwater ponds helps to inhibit the shellfish disease dermo, which is a threat to wild oysters.