8098

• UCREFRP Catalog Number: 8098
• Author: American Fisheries Society.
• Title: Proceedings of the 17th Annual Meeting, Colorado - Wyoming Chapter, American Fisheries Society.
• USFW Year: 1982.
• USFW - Doc Type: 1982.
• Copyright Material: NO

rear facing portion of the PVC Y fixture. This portion of the discharge assem-
bly was inserted over the PVC section attached to the release valve and was

fastened with one bolt after the tank and attachments were installed in the

airplane.

\
Li qui d rotenone (Chern Fi sh Synergi zed. 2.5%) was mixed in a 500 ga 11 on fiber-l
glass fish transport tank at a rate of 60 gallons of rotenone to an estimated '

240 gallons of water. The mixture was pumped into the tank in the aircraft
using a 12 volt submersible Porta Pump. Pump time at each stop was about

60-65 seconds. Extreme care was taken not to spill any rotenone in the cabin

of the aircraft. The lid was then sealed to reduce odor while enroute to the

target area. The bolts tightening the lid to the seal were loosened just prior

to rotenone release to prevent formation of a partial vacuum.

One load round trip from the Creede airstrip to the target area and return re-

quired about 25 minutes. The flight from Creede to the center of the target
drainage was an estimated 20 air miles. A total of 120 gallons of liquid rote-
none plus diluting water was dropped in 21 flights in two mornings.

Three men were required for the aerial operation, the pilot, an assistant to

handle the rotenone tank release lever and a ground person to assist in loading

and care of ground equipment.

Placing the discharge valve in the open position when the tank is empty and
the lid is slightly open creates an air flow that completely eliminates all

rotenone carrier odor from the airplane cabin. When the tank is full some odor
in the airplane is evident. Its effect appears to vary with different individ-
uals. A sealed system that can be used except when actually droppin9 the liquid

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