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How Many Wolves Is Enough?


By Bill Schneider, 2-01-07

As we start to debate wolf delisting, one question keeps coming up. How many wolves should we allow to roam the New West?

Yes, a very vocal minority likes the number zero, but they are fighting a losing battle. We will have viable wolf populations in Idaho, Montana and Wyoming, but how wolves do we need?

During the many recent news stories on delisting, the number 100 per state came up a lot and seemed to be the root of much controversy, so I called Ed Bangs, wolf recovery coordinator from the U.S. Fish and Wildlife Service (FWS), and Carolyn Sime, wolf coordinator for the Montana Department of Fish, Wildlife and Parks, to find out how we arrived at this number.

At this point, the wolf recovery zone (mostly but not completely matching the boundary lines of the three states) harbors about 1,200 wolves. We don’t all agree that this is too many, but federal and state wildlife agencies and virtually all political leaders think so and before the ink dries on delisting documents, we’ll be out killing wolves.

The official delisting proposal presented Monday by the FWS calls for a minimum of 30 packs and 300 wolves “equitably distributed” which is defined as 10 packs/100 wolves per state or in each “lobe” of the recovery zone--central Idaho, the greater Yellowstone area, and northwestern Montana, and enough travel between lobes to prevent any of the three from becoming “island populations,” which are usually more vulnerable to extinction.

This number was also embedded in the original recovery plan released in 1987, Bangs explained, and has been supported three times since then by most wolf biologists, recently in 2002 when Bangs surveyed 80 scientists, asking about the number, noting that “50 thought it was a reasonable number.” He admits the number might not be pure science, but has scientific backing.

Both Bangs and Sime point out that this is the minimum number, not the target.  “And distribution is as important as numbers,” Bangs emphasizes. We need movement and interbreeding between the three populations.

“We’re really saying a hundred or more per state,” Sime explains, so one state can’t justify having 50 wolves by the other two states having 250.

Also, the requirement for 30 packs might be the more important number. Experts estimate 10 wolves per pack to give us the 300 number. And a pack is clearly defined--a breeding pair with at least two pups as of December 31 of that year.

Bangs suggests that the states maintain at least 15 breeding pairs, but he also said the FWS will leave it up to the states to decide how many wolves above the minimum will be allowed. That authority scares enviros who fear states will consider 10 packs a ceiling instead of a floor.

Bangs explained that if aggressive control or other factors such as disease drive wolf numbers below 100 in a state, then the FWS will relist the wolf as a “threatened” species, a category not quite as seriously threatened with extinction as “endangered,” but still means states lose control again to the federal government. “It can never drop below 10 breeding pairs,” he warns.

So is 300 enough? Is 450 enough? Will we ever know?

Note: Refer to today’s Wild Bill column, Why It’s Hard to Celebrate Wolf Delisting



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