The construction industry collapse and last fall’s credit crisis sharply cut into shipping activity at the Port of Stockton, its director reported Wednesday: “We saw a decrease in construction-oriented shipping, such as cement and steel, and you also saw a decrease in the latter half of last year in the windmill segments we were handling.” The port counted 102 ships and 13 barges delivering or receiving cargo at the port last year, compared with 149 ships and 21 barges in 2008. … “A lot of other things have held steady,” he said. “We’ve done well in the export of California bagged rice in 2009. We’ve also done well in fertilizer imports.”