Ichthyologist: A salmon migration study shows that 60% of tracked fish travel upstream past Dam A, and 75% of those continue past Dam B. What percentage of all tracked salmon pass both dams?

Thu, 30 Apr 2026 00:57:23 +0000

**What Percent of Salmon Pass Both Dam A and Dam B? Insights from a Groundbreaking Study** Ever wonder how many tracked salmon successfully navigate two major barriers in a river system? A recent ichthyologist study reveals surprising patterns: 60% of salmon travel upstream past Dam A, and of those, 75% go on to pass past Dam B. With infrastructure like dams shaping fish migration, researchers are rethinking how to support these natural journeys. So, what percentage of all tracked salmon clear both dams? This question, now trending among conservationists and water system planners, reveals critical insights into river ecology and infrastructure planning across the U.S. **Why Ichthyologist: A Salmon Migration Study Matters Now** In recent years, public and scientific attention has converged around how human-built structures affect migratory fish. The study referenced shows a stark reality—while a strong majority of salmon begin their upstream ascent past Dam A, only three-quarters of them finish at Dam B. This staggering gap highlights a key tension in river management: efficiency at individual dams does not guarantee success at the system level. Such findings have sparked widespread discussion across fisheries, conservation, and regional planning circles in the U.S., especially where dam removal or fish passage upgrades are under review.