Study reveals plunge in big fish numbersBy Lidia WasowiczUPI Senior Science WriterFrom the Science & Technology DeskPublished 5/14/2003 1:05 PMView printer-friendly version A global survey spanning nearly half a century reveals a 90 percent plunge in the population of large ocean fish, from tuna to cod, since commercial fishing vessels took to the high seas, Canadian researchers reported Wednesday.With their numbers decreasing by as much as 80 percent in 15 years, the depleted communities could crash delicately balanced ecosystems, with unknown worldwide consequences, the surveyors of pelagic creatures warned."More than 90 percent of the fish we like to eat are...