Resources boost Canada's April GDP OTTAWA, June 29 (UPI) -- Canadian mining and oil-gas industries nudged national gross domestic product values up 0.3 percent in April, Statistics Canada reported Friday. Mining grew 3.1 percent in April, with increased output at copper, nickel, lead and zinc mines as well as potash mines, the report said. Oil and gas extraction advanced 2.4 percent in April. "Transportation services as well as the agriculture, forestry, fishing and hunting sector increased," StatsCan said. Wholesale trade was up 1.2 percent in April, a fifth consecutive monthly increase, although retail trade was down by 0.8 percent. Manufacturing declined 0.3 percent in April while transportation and warehousing services rose 0.7 percent, as "trucking and rail transportation benefited from the strength in mining and wholesale trade," the agency said.