Updates with production, price details May 5 (Reuters) - Miner Barrick Gold Corp ABX.TO, GOLD.N reported a 78% rise in first-quarter profit on Wednesday, helped by rising gold and copper prices. Copper prices have gained on the back of massive economic stimulus, while gold has been moving higher because of its appeal as a hedge against inflation. Barrick said realized gold prices climbed 11.8% to $1,777 per ounce, while total gold production fell to 1.10 million ounces from 1.25 million ounces.