Archive for Okeanos Tutorials

Fisheries Management and Maximum Sustainable Yield; Part 3 By Carl Safina

Okeanos Tutorials on February 8th, 2012 3 Comments

The idea that fisheries have a “maximum sustainable yield” was first articulated in the mid-20th Century. (For a history, see Carmel Finlay’s book All The Fish in the Sea; Maximum Sustainable Yield and the Failure of Fisheries Management. And for a contrary view on how much of the failure should be blamed on the concept […]

Fisheries Management and Maximum Sustainable Yield; Part 2 By Carl Safina

Okeanos Tutorials on February 8th, 2012 4 Comments

In various countries’ fisheries management laws and in international treaties, their formal management goal often refers to the concept of “maximum sustainable yield.” These laws and agreements govern how fisheries are (supposed to be) managed. So I thought it would be good to visit the question of what is maximum sustainable yield or MSY. “Maximum […]

Fisheries Management and Maximum Sustainable Yield – Part 1; A 3-Part Primer By Carl Safina

Okeanos Tutorials on February 8th, 2012 No Comments

The history of the question of limits might be expressed in three dominant historical themes: 1), that, after consideration, the world appears limitless (“It must be that nature has made all things specifically for the sake of man,” said Aristotle), 2) that the world appears limited, prompting the question of “How much can we take?,” […]

Tutorial: A Brief History of Fishing Part 2

Fish, Fishing & Fishermen, Okeanos Tutorials on December 27th, 2011 1 Comment

Part 2: Finding Hope? To continue making money, fisheries should be careful not to deplete the fish. But they tend to do the opposite, pursuing short-term gain in a race to the fish, driving many fish populations to all-time lows. Scientists from the Scripps Institution of Oceanography, Duke University, Stanford University, University of British Columbia, […]

Tutorial: A Brief History of Fishing—With A Splash of Hope

Fish, Fishing & Fishermen, Okeanos Tutorials on December 20th, 2011 2 Comments

Part I: Fishing Down In 1631 England’s King Charles I may have been the first person to ban a new fishing gear, writing: “The former abundance of fish is turned into such scarcitie and deareness, that… our citie of London, and even our owne Court, are many times unprovided for their necessary dyet…therefore…the nets heretofore […]

Tutorial: Science—A Moral Pursuit

Okeanos Tutorials on November 21st, 2011 3 Comments

Science is essentially the systematic pursuit of what is real in nature. Science is a method of inquiry. It asks, what is here?; then it seeks to answer questions of why and how. Science aims to be objective. Two scientists who hold opposite hypotheses, give money to opposing political parties, and are of different faiths […]

Tutorial: Energy—A Taste Of Waste

Climate Change, Okeanos Tutorials on November 17th, 2011 No Comments

Adapted from: 2011. The View From Lazy Point. Henry Holt Co.  New York. The first century of the Industrial Revolution, the 1800s, was powered by coal, whale oil, and slaves. The 20th was the century of petroleum (though 40 percent of U.S. train freight is still coal). World electricity generation is still two-thirds combustion (40 […]

Tutorial: Pacific Voices From A Rising Sea

Okeanos Tutorials, Pacific Voyagings on November 2nd, 2011 1 Comment

Adapted from: 2011. The View From Lazy Point. Henry Holt Co.  New York. Perpetua Tmetuchl goes by the nickname Tua. She’s been farming taro in the same place in Palau since the early 1980s. People have grown taro for about 5,000 years, and here some areas might trace an unbroken line of cultivation back fully […]

Tutorial: Global Warming And The Future Of Agriculture

Climate Change, Okeanos Tutorials, The View From Lazy Point on October 19th, 2011 No Comments

Adapted from: 2011. The View From Lazy Point. Henry Holt Co.  New York. Out of about 300,000 named plant species, we get 90 percent of our food from just 103 species, and we get 70 percent from just three: wheat, corn, rice. But—between 200,000 and 400,000 varieties of rice exist in the world. Some grow […]

Tutorial: Warming Air, Rising Seas

Climate Change, Okeanos Tutorials, The View From Lazy Point on October 13th, 2011 1 Comment

Adapted from: 2011. The View From Lazy Point. Henry Holt Co.  New York. Twenty thousand years ago when the Ice Age froze an enormous quantity of Earth’s water, sea level was nearly 400 feet (about 120 m) lower than today. Vast areas that are now seafloor were plains grazed by herds of animals. But the […]