of American Rivers:
The piece on “D-values” in the May
21 Columbia Basin Bulletin perpetuates a popular myth: that recent PIT-tag
studies indicating that transported fish may not suffer significantly higher
delayed mortality than in-river migrants equates to the conclusion that
transportation may work. As the CBB put it: “Without a negative D factor,
transportation would provide a reasonable option for mitigating many of
the impacts to fish from dam passage.” This conclusion is …

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