Daily Climate: Pete Libra is frustrated. The 40-year-old cod fisherman sees lots of fish in the ocean, and he wants to catch more. Fishing authorities see fewer, and want him to catch less. “I’m not a scientist. But I see the fish,” said Libra. His is the voice of many of the fishermen in Gloucester, the heart of a once-great fishing industry that powered fledgling America and underwrote New England’s economy. Many fishermen here feel threatened by a sweeping new set of fishing limits imposed …