| Bear
cubs weigh from 225-565 gm (8 to 20 oz) at birth and depend
on their mothers for 17 to 29 months. During this time, they
are subject to relatively high mortality rates, especially
if their mothers are killed.
Bear cubs are orphaned due to a variety of causes. Some
of the more common reasons include commercial land use activities
i.e. extractive industries like logging, regulated and non-regulated
hunting, weather events (particularly drought), road/train
accidents, abandonment as a result of food shortages, and
conflict situations - mother bears who are involved in conflict
with humans are sometimes destroyed, leaving cubs orphaned.
Often the cubs are destroyed as well. Another option for
these cubs, if they are too young to survive on their own,
is to house them in a rehabilitation centre until they are
big enough and old enough to survive on their own, at which
time they can be released back to the wild.
Most people do not want to see orphaned cubs die of starvation
or be kept in captivity under inhumane conditions. Rehabilitation
and release of orphaned cubs is a viable option for handling
such an unfortunate situation - cubs don't have to be euthanized.
Nevertheless, the best solution is always prevention. People
living in bear country can prevent
conflict with bears and reduce the chances of cubs becoming
orphaned.
There are basically four options wildlife officials can
consider to address orphaned cubs:
1. Leaving cubs in the wild
Leaving a cub in the wild is a viable option if they are
old enough to survive alone and have adequate fat reserves.
Although brown bear cubs as young as 6 months old are known
to have survived in the wild after being orphaned, and American
black bear cubs as young as 5 to 7 months of age have survived,
information from studying released bears suggests that survival
rates are higher for older, larger cubs.
Bear cubs depend primarily on their mothers for protection
against predators until they are self-sufficient. The experiences
of many rehabilitators suggest that the behaviors and skills
cubs need to survive in the wild are instinctive and do
not need to be taught to them by their mothers. As a result,
the likelihood of cubs surviving without intervention by
humans probably increases substantially as they grow older,
larger and less vulnerable to predation by adult bears or
other carnivores.
The circumstances that led to the orphaning of the cubs
also may influence their chances for survival in the wild.
Cubs orphaned near human habitation or in habitats influenced
by human activities may be at greater risk of becoming habituated
or becoming involved in conflict in the future.
The primary advantage of choosing this option is the cubs
remain a part of the natural fauna and live at no cost to
management authorities. The main disadvantage is they may
be less likely to survive than if they were raised in a
rehabilitation facility and released when they were older
and larger in size.
2. Placing cubs in captivity
Placing orphaned cubs in permanent captivity is the outcome
least desirable to many people interested in the welfare
of orphaned cubs. Bears are long-lived animals and require
relatively large enclosures. Consequently, the demand for
bears as display animals by research facilities or zoological
institutions is low, so few opportunities exist for placing
them in permanent captivity. While this option, too, involves
little cost to wildlife management authorities, the cubs
are lost to the wild population.
3. Raising and releasing cubs
Rehabilitation facilities offer another viable option for
wildlife managers in areas where they are available. These
facilities, when operated by experienced persons, have demonstrated
that bears can be excellent candidates for release back
to the wild.
Survival rates for orphaned cubs do not differ substantially
from those of wild cubs, and few animals (less than 2%)
become involved in conflict situations within one year of
their release. Studies further show that released American
black bears even have the ability to function behaviorally
as wild bears, evidenced by the fact that many have become
reproducing members of the population.
If you suspect that a cub is orphaned, contact the local
wildlife agency to make arrangements to take the cub to
a certified rehabilitation centre. Generally speaking, cubs
can be assumed to be orphaned if a sow has not returned
to care for her cubs during an 8 hour period.
Cubs can be caught by baiting a live trap or bear box.
Once caught, the cub can be transported in the trap or a
dog carrier. This should be done ONLY under the guidance
of your local wildlife agency or rehabilitation facility.
Download
a list of Rehabilitation Facilities
Rehabilitation
Associations in Canada, United States
4. Euthanizing cubs
Euthanasia is clearly a less costly and safer alternative
available to wildlife managers. However, many people do
not view this option as a positive choice, and it can generate
negative publicity for the governmental entity charged with
protecting and managing bear populations.
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