For education and discussion only. Not for commercial use. In the late 1930s, California's sardines supported the biggest fishery in the western hemisphere, with more than half a million tons of fish caught each year. By the mid-1950s, the sardines had virtually disappeared. Although fishing pressure may have played a part in this process, new research published in the current issue of Science indicates that the sardines' demise was part of a 50-year cycle that affects not just California, but the entire Pacific Ocean. Francisco Chavez, a biological oceanographer at the Monterey Bay Aquarium Research Institute at Moss Landing and...