Rotenone kills fish because it constricts the capillaries around
their gills and essentially suffocates them. At least that's what I
learned years ago. It does have some effect as well on invertebrates
that breathe through gills.
-----
Dennis Paulson
1724 NE 98 St.
Seattle, WA 98115
206-528-1382
dennispaulson at comcast.net

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