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Archive for April 2nd, 2013


Food and Farm-Targeting Wolves

“The resumption of wolf-hunts in Idaho, Montana and Wyoming illustrates why citizens must continue to oppose such unnecessary and senseless slaughters.

The wolf-hunts are predicated upon morally corrupt and inaccurate assumptions about wolf behavior and impacts that is not supported by recent scientific research. State wildlife agencies pander to the lowest common denominator in the hunting community—men who need to booster their own self esteem and release misdirected anger by killing.

Wolf-hunts, as Montana Fish and Game Commission Chairman Bob Ream noted at a public hearing, are in part to relieve hunters’ frustrations—frustration based on inaccurate information, flawed assumptions, and just plain old myths and fears about predators and their role in the world.

Maybe relieving hunter frustration is a good enough justification for wolf-hunts to many people. However, in my view permitting hunts to go forwards without even registering opposition is to acquiesce to ignorance, hatred, and the worse in human motivations. Thankfully a few environmental groups, most notably the Center for Biological Diversity, Wildearth Guardians, Alliance for Wild Rockies and Western Watersheds had the courage and gumption to stand up to ignorance and hatred.

All of the usual justifications given for wolf-hunts are spurious at best. For instance, one rationale given for hunting wolves is to reduce their presumed affects on big game populations. Yet in all three states, elk and deer populations are at or exceed population objectives for most hunting units.

For instance in Wyoming, one of the most vehement anti wolf states in the West, the 2010 elk population was 21,200 animals over state-wide objectives, and this did not include data for six herds, suggesting that elk populations are likely higher. Of the state’s elk herds most were at or above objectives and only 6 percent were below objectives. Similar data is found for Idaho and Montana elk herds as well.

However, you would not know that from the “howls” of hunters who characterize the elk populations as suffering from a wolf induced Armageddon. And Fish and Game departments are loath to counter the false accusations from hunters that wolves are somehow “destroying” hunting throughout the Rockies.

Experience in other parts of the country where wolves have been part of the landscape longer suggests that in the long term, wolves while they may reduce prey populations in certain locales generally do not reduce hunting opportunities across a state or region. Despite the fact that there more than double the number of wolves in Minnesota (3000+) as in the entire Rocky Mountain region, Minnesota hunters experienced the highest deer kills ever in recent years, with Minnesota deer hunters killing over 250,000white-tailed deer during each of those hunting seasons – an approximate five-fold increase in hunter deer take since wolves were listed under the ESA in 1978.

Another claim made by wolf-hunt proponents is that hunting will reduce “conflicts” with livestock owners. Again this assertion is taken as a matter of faith without really looking into the veracity of it. Given the hysteria generated by the livestock industry one might think that the entire western livestock operations were in jeopardy from wolf predation. However, the number of livestock killed annually by wolves is pitifully small, especially by comparison to losses from other more mundane sources like poison plants, lightning and even domestic dogs.

For instance, the FWS reported that 75 cattle and 148 sheep were killed in Idaho during 2010. In Montana the same year 84cattle and 64 sheep were verified as killed by wolves. While any loss may represent a significant financial blow to individual ranchers, the livestock industry as a whole is hardly threatened by wolf predation. And it hardly warrants the exaggerated psychotic response by Congress, state legislators and state wildlife agencies.

In light of the fact that most losses are avoidable by implementation of simple measures of that reduce predator opportunity, persecution of predators like wolves is even more morally suspect. Rapid removal of dead carcasses from rangelands, corralling animals at night, electric fencing, and the use of herders, among other measures, are proven to significantly reduce predator losses—up to 90% in some studies. This suggests that ranchers have the capacity (if not the willingness) to basically make wolf losses a non-issue.

However, since ranchers have traditionally been successful in externalizing many of their costs on to the land and taxpayers, including what should be their responsibility to reduce predator conflicts, I do not expect to see these kinds of measures enacted by the livestock industry any time soon, if ever. Ranchers are so used to being coddled; they have no motivation or incentives to change their practices in order to reduce predator losses. Why should they change animal husbandry practices when they can get the big bad government that they like to despise and disparage to come in and kill predators for them for free and even get environmental groups like Defenders of Wildlife to support paying for predator losses that are entirely avoidable?

But beyond those figures, wolf-hunting ignores a growing body of research that suggests that indiscriminate killing—which hunting is—actually exacerbates livestock/predator conflicts. The mantra of pro wolf-hunting community is that wolves should be “managed” like “other” wildlife. This ignores the findings that suggest that predators are not like other wildlife. They are behaviorally different from say elk and deer. Random killing of predators including bears, mountain lions and wolves creates social chaos that destabilizes predator social structure. Hunting of wolves can skew wolf populations towards younger animals. Younger animals are less skillful hunters. As a consequence, they will be more inclined to kill livestock. Destabilized and small wolf packs also have more difficulty in holding territories and even defending their kills from scavengers and other predators which in end means they are more likely to kill new prey animal.

As a result of these behavioral consequences, persecution of predators through hunting has a self fulfilling feedback mechanism whereby hunters kill more predators, which in turn leads to greater social chaos, and more livestock kills, and results in more demands for hunting as the presumed solution.

Today predator management by so called “professional” wildlife agencies is much more like the old time medical profession where sick people were bled. If they didn’t get better immediately, more blood was let. Finally if the patience died, it was because not enough blood was released from the body. The same illogical reasoning dominates predator management across the country. If killing predators doesn’t cause livestock losses to go down and/or game herds to rise, it must be because we haven’t killed enough predators yet.

Furthermore, most hunting occurs on larger blocks of public lands and most wolves as well as other predators killed by hunters have no relationship to the animals that may be killing livestock on private ranches or taking someone’s pet poodle from the back yard. A number of studies of various predators from cougars to bears show no relationship between hunter kills and a significant reduction in the actual animals considered to be problematic.

Again I hasten to add that most “problematic predators” are created a result of problem behavior by humans—for instance leaving animal carcasses out on the range or failure to keep garbage from bears, etc. and humans are supposed to be the more intelligent species—though if one were to observe predator management across the country it would be easy to doubt such presumptions.

Finally, wolf-hunting ignores yet another recent and growing body of scientific evidence that suggests that top predators have many top down ecological influences upon the landscape and other wildlife. The presence of wolves, for instance, can reduce deer and elk numbers in some places for some time period. But rather than viewing this as a negative as most hunters presume, reduction of prey species like elk can have many positive ecological influences. A reduction of elk herbivory on riparian vegetation can produce more song bird habitat. Wolves can reduce coyote predation on snowshoe hare thus competition for food by lynx, perhaps increasing survival for this endangered species. Wolves have been shown to increase the presence of voles and mice near their dens—a boon for some birds of prey like hawks. These and many other positive effects on the environment are ignored by wolf-hunt proponents and unfortunately by state wildlife management agencies as well who continue to advocate and/or at least not effectively counter old fallacies about predators.

Most state agencies operate under the assumption that production of elk and deer for hunters to shoot should have priority in wildlife management decisions. All state wildlife agencies are by law supposed to manage wildlife as a public trust for all citizens. Yet few challenge the common assumption that elk and deer exist merely for the pleasure of hunters to shoot.

I have no doubt that for many pro wolf-hunt supporters’ predators represent all that is wrong with the world. Declining job prospects, declining economic vitality of their rural communities, changes in social structures and challenges to long-held beliefs are exemplified by the wolf. Killing wolves is symbolic of destroying all those other things that are in bad in the world for which they have no control. They vent this misdirected anger on wolves– that gives them the illusion that they can control something.

Nevertheless, making wolves and other predators scapegoats for the personal failures of individuals or the collective failures of society is not fair to wolves or individuals either. The entire premises upon which western wolf-hunts are based either are the result of inaccurate assumptions about wolf impacts or morally corrupt justifications like relieving hunter anger and frustrations over how their worlds are falling apart.

I applaud the few environmental groups that had the courage to stand up for wolves, and to challenge the old guard that currently controls our collective wildlife heritage. More of us need to stand up against persecution of wildlife to appease the frustrations of disenfranchised rural residents. It is time to have wildlife management based on science, and ecological integrity, not based upon relieving hunter frustrations over the disintegration state of their world.”

For on predator studies and management see http://www.thewildlifenews.com/wp-content/uploads/2011/06/Predator-report.pdf

**Special thanks to George Wuerthner,  an ecologist and former hunting guide with a degree in wildlife biology, for providing this information!

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HUNTER

This information is from the 1980’s and 1990’s but gives all of you stat lovers out there some great facts.  As you can see, clearly hunters have the greatest impact on deer populations.  Enjoy!

Appendix E Impact of Wolves on Deer in Wisconsin. by Ronald N. Schultz, Keith R. McCaffery, and Adrian P. Wydeven

“Many hunters continue to be concerned about the impact wolves may have on deer populations. During fall 1997 hunters became aware of the lower deer numbers across northern Wisconsin, and some blamed the deer decline on the increasing wolf population. The severe winters of 1995-1996 and 1996-1997 were the main factor that caused the deer decline across northern Wisconsin. Because such deer declines do create concerns over the impact of wolf predation, careful monitoring of wolf and deer populations will continue to be important aspects of management for both species.

Winter mortality is the main factor affecting deer numbers in northern Wisconsin. (Figure E1) During winter 1995-96 as many as 170,000 deer died in northern Wisconsin due to harsh winter weather. In the 1996-97 winter another 70,000 may have died. Winter Severity Indices correspond to severe winters and declines in the deer population.

There have been a few cases where wolves have limited ungulates (hooved mammals) to low population densities (Mech and Karns 1977; Gasaway et al. 1992). Generally such wolf impact would occur when ungulate populations are also stressed by severe winters, habitat deterioration, and/or overharvest. Fuller (1990) monitored a deer herd decline in Minnesota wolf range that went from 28 to 10 deer per square mile, but wolves accounted for only 10% of the deer mortality. Mech (1984) indicated that wolves rarely limit deer populations. Deer populations would normally need to be reduced to fewer than 3 deer/mi2 for wolves to limit growth of the deer population (Mech 1984). Generally wolf predation is not a major mortality factor to deer populations until deer densities drop to fewer than 10 deer/mi2 (Wydeven 1995). Deer densities of fewer than 10 deer/mi2 occur infrequently in Wisconsin.

Wolves in the Great Lakes region normally consume 15-18 deer per wolf per year (Fuller 1995). At a rate of 18 deer per wolf pack per year an average Wisconsin wolf pack of four wolves on a 70-square mile territory would consume about 72 deer or about 1 deer per square mile. Wisconsin’s wolf population in 1999 consisting of about 200 wolves probably consumed 3,000 -3,600 deer. The total 1998 harvest within the central and northern forest zones where wolves occur was 112,936 by firearm hunters, 29,266 by bow hunters and another 10,000 by motor vehicles.

Mortality due to wolves occurs year round which is much different than hunting mortality which is compressed into one season and has less effect on herd dynamics and hunter opportunity, because some wolf predation is compensatory.

The projected potential wolf population in Wisconsin could be 300-500 wolves (Appendix C). At a rate of 18 deer per wolf year, wolves would annually remove 5,400-9,000 deer. This rate of wolf predation would occur across 6000+ square miles, therefore would consist of 0.9 to 1.5 deer per square mile. Deer population density over winter across this region would generally range from 10 to 25 deer per square mile

The overall deer population and deer density were compared for 4 deer management units with wolves and 4 deer management units without wolves across northern Wisconsin (Table E1). Population fluctuations were relatively similar across deer management units with or without wolves. Deer density was slightly more in units without wolves than units with wolves, but the results were not statistically different (t-test P>0.10). The over winter management goals for the units with wolves is 18.7 deer per square mile. The management goals for the units without wolves is 21.3 deer per square mile. These goal differences reflect habitat and climatic effects unrelated to wolves. It appears that habitat and climatic effects have greater impacts on deer population trends than wolf predation.

Table E1     Comparison of deer population densities from 4 deer management units with wolves in    Wisconsin and 4 deer management units without wolves
Deer Management Units with wolves (1473 sq. miles) Deer Management Units     without wolves (1536 sq.miles)
Wolf No. Deer No. Deer/mi2 Wolf No. Deer No. Deer/mi2
1987-1988 28 28.900 19.6 0 35,900 23.4
1988-1989 33 35,600 24.2 0 41,300 26.9
1989-1990 33 35,300 24.0 0 38,600 25.1
1990-1991 37 37,800 25.6 0 44,000 28.6
1991-1992 22 33,800 22.9 0 35,200 22.9
1992-1993 24 24,400 16.6 0 25,200 16.4
1993-1994 31 24,300 16.5 0 29,400 19.2
1994-1995 31 33,400 22.7 0 42,400 27.6
1995-1996 30 46,200 31.3 0 50,900 33.1
1996-1997 37 31,400 21.3 0 41,800 27.2
Avg. Density 22.5 25.0
Mgt Goal 18.7 21.3
Population Density     Over Mgt. Goal 3.8 3.7

Furthermore, the average rate of herd increase from post-harvest to subsequent pre-harvest (1981-1997) was 1.33 for units without wolves and 1.31 for units with wolves which shows similar recruitment (net increase in herd size) in both sets of management units.

Overall it does not appear that wolves are likely to be a major mortality factor to deer in northern Wisconsin under current conditions or in the near future. Even with a population of 500 wolves, annual predation of 9000 deer would represent only 2.6% of the overwinter population of 343,000 deer in the Northern Forest and Central Forest. The area has an average fall population of about 450,000. Much of the predation by wolves would probably compensate for other natural mortality because it occurs year-round. A large proportion of northern Wisconsin deer die from natural causes, which can vary drastically depending on severity of winter (Creed et al. 1984). Wolves would probably remove some of these animals that would die from other causes. A deer killed by wolves won’t be killed by winter stress or other mortallities.

Wolves may also displace other predators such as coyotes (Peterson 1995); under some circumstances coyote predation may have more of an impact on deer populations than wolves (Mech 1984). The current deer management system in Wisconsin adjusts antlerless deer harvest in individual deer management units by limiting the number of hunter choice permits per unit (VanderZowen and Warnke 1995). This system should be able to adequately adjust for the impacts of wolf predation in deer management units. Generally, wolf predation would have very limited impact on the number of hunter-choice permits issued, or the overall deer harvest within specific management units.”

Literature Cited:

  • Creed, W.A., F.P. Haberland, B.E. Kohn, and K.R. McCaffery. 1984. Harvest management:    The Wisconsin experiences. Pages 243-260 in L.K. Halls, ed. White-tailed Deer Ecology    and Management. Wildl. Manage. Inst., Stackpole Books, Harrisburg, PA. 870 pp.
  • Fuller, T.K. 1990. Dynamics of a declining white-tailed deer population in    north-central Minnesota. Wildl. Monogr. 110. 37 pp
  • Fuller, T.K. 1995. Guidelines for gray wolf management in the northern Great Lakes    region. International Wolf Center, Tech. Publ. #271. Ely, Minnesota. 19 pp.
  • Gasaway, W.C., R.D. Boiertje, D.V. Grangaard, D.G. Kellyhouse, R.O. Stephenson, and D.G.    Larsen. 1992. The role of predation in limiting moose at low densities in Alaska and    Yukon and implications for conservation. Wildl. Monogr. 120. 59 pp.
  • Mech, L.D. 1984. Predator and predation. pp. 189-200 in L.K. Halls, ed. White-tailed    Deer: Ecology and Management. Stackpole Books, Harrisburg, PA. 870 pp.
  • Mech, L.D. and P.D. Karns. 1977. Role of the wolf in a deer decline in the Superior    National Forest. USDA. For. Serv. Res. Report. NC-148. 23 pp.
  • Peterson, R.O. 1995. Wolves as interspecific competitors in canid ecology. Pages    315-323 in L.N. Carbyn, S.H. Fritts, and D.R. Seip. Ecology and conservation of wolves in    a Changing World. Canadian Circumpolar Institute, Occ. Publ. No. 35, 642 pp.
  • VanderZouwen, W.J. and D.K. Warnke. 1995. Wisconsin deer population goals and harvest    management: Environmental assessment. Wisconsin Department of natural Resources,    Madison, WI. 305 pp.
  • Wydeven, A. Wolf carrying capacity. Pages 43-47 in W.J. VanderZouwen and D.K. Warnke,    eds. Wisconsin deer population goals and harvest management: Environmental assessment. Wisconsin    Department of Natural Resources, Madison, WI 305 pp.

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