Bonneville Power Administration: Making Senses of Salmon Runs

Portland, OR – While the vast majority of ESA-listed stocks have shown significant increases in abundance since their listings in the 1990s, the return numbers for each species vary greatly between individual years. Recent studies may help explain why.  State fishery managers last week released their preseason forecast for 2013 returns of salmon and steelhead to the Columbia River. After two years when salmon and steelhead returns were among the highest since recordkeeping began (see graph, Adult returns to Bonneville Dam), this year forecasts are down for some stocks. Read more