Indianapolis, Indiana USA
Rotenone is toxic to all fish if used in high enough concentration (it
paralyzes their gills. Some fish can be revived if they are caught soon after
the application and placed in fresh water or that containing Potassium
permanganate) Five parts per million rotenone will kill all fish! Those that
are the most resistant (hardest to kill) are the non-game specie like common
carp and bullhead. One part per million will kill most gamefish. In most cases
the fish that are wanted to remove are the last to die!
Rotenone can be used selectively to kill part of a population to get a good
sample of the population. An area (finger or small bay) is blocked off with a
plastic or canvas barrier and the rotenone is applied in this area. The dead
fish are then collected, sorted, and counted.
Byron T. Bezdek
/"Unless stated otherwise, comments made on this list do not necessarily
/ reflect the beliefs or goals of the North American Native Fishes
/ This is the discussion list of the North American Native Fishes Association
/ nanfa_at_aquaria.net. To subscribe, unsubscribe, or get help, send the word
/ subscribe, unsubscribe, or help in the body (not subject) of an email to
/ nanfa-request_at_aquaria.net. For a digest version, send the command to
/ nanfa-digest-request_at_aquaria.net instead.
/ For more information about NANFA, visit our web page, http://www.nanfa.org