Notice of Hearing on the Application to Use Sodium Fluoroacetate ...

in aversive cond:xic~ing and :ne neurq;(;~y <strong>of</strong> 'sarning. ~e
cor1s i cer-2~ :nax c2st2 a\ie!-s1 ve :=nai :: sj-,' r , ~ +ids 3 , i 331 2 2rada-fi -, r
1 '
ccnxrol alc2rnaciv?, ass2rting tnat gr3cacion !qas 2asicaIly a
feeding probl~,'f~ and that bo?h laboratzry and field ;cudies
denonstrated the promi se <strong>of</strong> taste aversion condi tioni ng in
control 1 i ng predztory behavior, He 'esti f ied that tne dosage <strong>of</strong>
LiCL should be ax cuncsntrations nor detec~zbiz 3s salt by tne
coyote or the aversicn l~ould be ta the ;a? c. 2e indicated chat a
- 15/
proper dosage would se .12 or .15 moiers, fhe quanci ty <strong>of</strong> NaCL
present i n na turai f1 esh. A1 though he considered taat the fi el a
stuaiss by Qrs. Custavson and Ellins d~rnonstr3ted thar aversion
conditjoning could reducz predation, Dr. Sarcia recognized ~hac
furrner res2arcn xas necessary to serfzct the ~xhnique and maks ic
more workable for ranchers to irnplment.
The ces1s by the F1dS <strong>of</strong> the US? <strong>of</strong> diethy1stiibestrc)I 3s an
antif2rti 1 i ty agent or reproductive inhibitor have previously be9n
mentioned (finding 101 ) . A report on these tzsts indicates thac
the study ar3as in Texas and Yew Hexicg were ~reated with tai low
baits containing stilbestrol approximat2ly cne month before the peak
<strong>of</strong> the coyote breeding szason. Difficul ties wi th coyote acceptance
<strong>of</strong> the baits and liigh reproductive success necessitated a change in
Is/ A mole is a unit based on molecular weight. It is not clear
that z e concentration recommended by Dr. Garcia corresponds with that
usec by Crs. ~uszzvsor 2nd t: ! i ~ s :=z::,
:n ~~21.2