AVERSIVE
CONDITIONING
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Aversive
conditioning of nuisance bears is not new, but there have
been some recent developments that may offer substantially
improved results. Aversive conditioning is simply creating a
very negative experience for the offending animal, hoping
that the negative experience will outweigh the positive
rewards offered by the nuisance activity.
Nuisance bears have traditionally been
captured at the site of the offense, immobilized, marked and
weighed, and allowed to recover from the drugs. When
released, the bears were hazed with rubber buckshot or
pepper sprays and, in some cases, this worked well. However,
many nuisance bears that were habituated to humans and
either food or garbage, often continued their nuisance
activity after capture and harassment. Often they would
change location, but the offending activity persisted. As a
result, several bears were killed by agency personnel or
placed in zoos. Other bears were killed by motor vehicles
because they were spending so much time in areas near
humans.
Using
dogs to haze bears had been discussed in recent years at
BBCC gatherings. The discussions were dominated by what
breed of dog would be best and how they would work in this
region. The job requires a dog of sufficient size and
athletic enough to move efficiently through the dense,
swampy bear habitat of south Louisiana. An overly aggressive
dog would likely get killed by a bear, so another
requirement was for a dog with good temperament and
excellent obedience. Hounds trained to hunt wild hogs were
used on several occasions to haze bears with some positive
results. Unfortunately, the hounds got so scattered over the
swamps and marshland that it sometimes took several days to
collect the dogs. This created another problem with the time
required to work a
nuisance
situation, and so the search for another breed continued.
The Blackmouth cur was the next candidate selected for use
in aversive conditioning. The Blackmouth cur is a
medium-sized dog that is very athletic, tractable, and
aggressive. This breed is used as a stock and hunting dog
that traditionally hunts hogs, squirrels, and raccoon.
The dogs are used in combination with the
same aversive conditioning procedures employed on nuisance
bears as before, but after the initial hazing with rubber
buckshot, the dogs are released. Experienced dogs will catch
the bear within about one hundred yards and either tree it
or circle it on the ground, cutting off its escape when it
tries to run. The “fight” involves a lot of barking and
growling, with little to no actual contact. When the dogs
are holding the bear at bay, a biologist can run up and
usually get off another round of rubber buckshot to get the
bear running again. The dogs will usually catch the bear
again in another hundred yards or so and the process is
repeated. This may happen three or four times before the
dogs are called back to the handler.
The
hazing is very intense for about fifteen minutes and then
the bear is allowed to go about its business. The BBCC
Conflict Management Team has been using the curs for three
years and has experienced a 90% success rate on bears hazed
with the dogs. When the dogs are properly trained, they can
be utilized in a variety of situations because they can be
called back if necessary. The dogs are also useful as
ambassadors for the bear management program, where they can
be taken to presentations to school groups and other
educational opportunities with the public.
Rubber
Buckshot Warning: The various brands of “less than lethal”
rubber bullets, buckshot, and slugs, perform differently.
Some are safe at close range and ineffective at greater
distances. Others, effective at up to fifty yards, are
dangerous at close range. Only trained personnel should be
allowed to use these tools in dealing with wildlife
management issues.
Pepper Spray Warning: If used
improperly, the pepper sprayer might get sprayed, and the
result is a very unpleasant experience. Quite a few
biologists have inhaled the pepper mist intended for brother
bruin. The BBCC Conflict Management Team doesn’t typically
use pepper spray for the obvious reasons. And yes, we
learned the hard way! |