The BP oil spill has impacted several industries, including shrimp fishermen along the Gulf coast. That may leave you wondering how the nation’s shrimp prices will be affected. Here’s what you need to know.

Shrimp is the nation’s No. 1 seafood product and Louisiana is tops in U.S. shrimp production. But most the shrimp consumed in the U.S. comes from overseas, with only about 7 percent coming from the Gulf, according to the National Fisheries Institute.

Louisiana’s biggest seafood item — shrimp — is down to just 30 percent of normal production, according to the Louisiana Seafood Promotion & Marketing Board. That’s driving up prices of shrimp from the region.

A 21-25 count of brown shrimp from Gulf of Mexico cost $6.50 this week, a 44 percent jump from $4.50 the week of the oil spill, according to Urner Barry, which provides market quotes to the wholesale food industry.

Shrimp prices were rising before the oil spill, in part because of production problems in Asia. The U.S. government also barred wild-caught shrimp from Mexico because crews were allegedly failing to take measures to prevent sea turtles from getting caught in nets.

Walmart and Kroger, two of the nation’s largest grocers, say they buy shrimp from so many different sources that they have not had to raise prices.