Slow dam passage in adult columbia river salmonids associated with unsuccessful migration : delayed negative effects of passage obstacles or condition-dependent mortality?

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Effectiveness monitoring of fish passage facilities: historical trends, geographic patterns and future directions (2010, background): “…States have monitored migration of Pacific salmon following passage through fishways and suggest that slow passage times (Naughton et al. 2005; Caudill et al. 2007) or falling back downstream of a dam after initial passage (Boggs et al. 2004) may be associated with greater mortality en-route…”
Effects of Body Size and River Environment on the Upstream Migration of Adult Pacific Lampreys (2009, background): “Transmitter costs and tagging restrictions on smaller lampreys have precluded systemwide telemetry evaluations such as those for Endangered Species Act–listed Columbia River salmonids (eg, Williams et al. 2005 ; Caudill et al.”
Fishway passage and post‐passage mortality of up‐river migrating sockeye salmon in the Seton River, British Columbia (2011, background): “, 2008) or passage success (Naughton et al., 2005; Caudill et al., 2007) between the sexes, although these studies were carried out at sites much further away from spawning areas.”
Unintended consequences and trade-offs of fish passage (2013, background): “For spawning runs, such challenges can also mean that individuals arrive at spawning grounds with less energy for reproduction (Caudill et al. 2007; Schilt 2007) and arrive late, possibly creating a mismatch between offspring hatch and food availability (Cushing 1975).”