This week's episode of The Naturalist is a continuation on last week's discussion with Paul Greenberg, author of "Four Fish: The Future of the Last Wild Food". This week they explore cod and tuna and have a conversation about the present state and future of sustainable fisheries around the country. This episode was sponsored by Cain Vineyard & Winery.

Did you know that most Americans did not eat tuna until the 20th century? On this week's episode of A Taste of the Past, Linda Pelaccio sits down with Andrew F. Smith, a food historian and author of the recent book, American Tuna: The Rise and Fall of an Improbable Food. Learn about how Mediterranean immigrant populations popularized the fish in the United States, and how the Japanese made it a staple of culinary culture. Hear about how American preferences in terms of tuna preparation have changed over the decades, from canned to raw. With all of the media attention concerning methylmercury, is tuna still safe to eat? Tune in to learn more about the different varieties of tuna, population levels, and the role of sport fisherman in the tuna industry. This episode has been brought to you by Hearst Ranch.

"Once you remove the oil from it, it's actually a very mild-tasting fish. You can use it as a substitute in pretty much all of your chicken recipes."

"80% of the Bluefin tuna stock that was around in the 1970s is now gone. The thought used to be if we restricted catching, then we would give the population an opportunity to recover... There's no evidence that supports that."

-- Andrew F. Smith on A Taste of the Past

Katy Keiffer is back with more Straight, No Chaser! In the beginning of the episode, Katy outlines some of the topics and guests for the upcoming season. So don't miss a single episode; tune in for Straight, No Chaser every Sunday at 1pm! Katy's guest on this week's episode is Andrew F. Smith, professor of Food Studies at the New School. Andy's newest book is called American Tuna: The Rise and Fall of an Improbable Food. Learn about the reasons for the culinary evolution of the tuna. Once a "trash fish", tuna has become a staple in American households. Hear more about the threat of methylmercury in commercially caught tuna, as well as the reason for so many dolphin deaths in tuna fishing. This program has been brought to you by Cain Vineyard & Winery.

"How do you convince Americans to buy a fish that they have never bought before?"

"When this first came to light, it is estimated that they [Yellowfin tuna fisherman] were killing 1 million dolphins per year."

-- Andrew F. Smith on Straight, No Chaser