Pup season is winding down now here at the
Red Wolf Recovery Program. Totals for 2013 will be announced shortly, but in the meantime, we thought we’d share a foster opportunity we had
last week.
A female red wolf pup was
born in late April this year at the Sandy Ridge captive site, the
Red Wolf Species Survival Plan facility on
Alligator River National Wildlife Refuge.
She was the sole survivor of her
litter.
This presented a good
opportunity to foster her into a wild litter of similar age.
Fostering pups from a captive litter to a
wild litter has been a successful tool used by the
Red Wolf Recovery Program as a means to increase the numbers of wild red
wolves and enhance the genetic diversity of the wild population.
Pup fostering was first used in 2002, when two captive-born
pups were successfully fostered into a wild litter.
Since then, we have seen some
success
with pup fostering with similar efforts.
In fact, no wild red wolf mother has ever been known to reject a
fostered pup, and the fostered pups’ survival rates appear to be equal to that
of their wild-born packmates.
There are
several factors that can determine the likelihood of successful fostering. Ideally,
the pups need to be no older than two-weeks of age at the time of the
fostering.
During this time, the
strong maternal instinct of the mother decreases the likelihood
of pup rejection. The pups have limited mobility at this age as well, which ensures
they will stay in or nearby the den site (and the mother).
We also aim to have all the pups similar in
age, which can reduce any one-sided competition for food.
Lastly, a potential foster mother is usually
selected based on her having a relatively low number of pups in her litter.
Female pup in transport. Photo credit: USFWS/B. Bartel
Pup processing: collecting blood and inserting the
transponder.
Photo credits: USFWS/B. Bartel
In this case, there were two female pups already present in
the wild litter, and all the pups were between 9-11 days old. Once the new foster pup was covered with the scent (urine) of the other pups in the litter, all three pups were placed back into the den. We’ll keep you posted on their progress!
The new pack! Photo credit: USFWS/B. Bartel