Showing posts with label cull. Show all posts
Showing posts with label cull. Show all posts

Friday, 11 March 2016

Translocation: a good first step away from deer-killing



by Barry Kent MacKay, Director
 
Late in February Liz White and I travelled to Kimberley, British Columbia, population 7600 (see https://en.wikipedia.org/wiki/Kimberley,_British_Columbia).  Liz and I were there to monitor a mule deer relocation project,  thanks to support from Born Free USA, Zoocheck and Animal Alliance of Canada.  Animal Alliance had contributed $10,000 to a project that involved moving mule deer out of town to carefully chosen distant habitats.  Those locations were chosen to maximize the chances the deer would have to survive.   The money Animal Alliance donated to the project bought collars equipped with radio-telemetry devices that report the location of the deer via a transmission to a satellite every 13 hours.  They are designed to eventually fall off but would provide enough information to allow the scientists to determine how successful the process was in terms of survival of the deer.

Mule deer in BC
Lest you think it odd that animal protection organizations such as ours would have even minimal involvement in such a thing let me assure you it was to provide part of an alternative to the current deer culling where deer are captured in “clover traps” and killed by a bolt gun.  Earlier this year someone captured this process during a secretly conducted cull in the nearby town of Cranbrook.  The BC Deer Protection society, (http://www.bcdeer.org/), of which both Liz and I are directors, posted the footage online.

Mule deer inhabit various towns and small cities that are built in close proximity to vast forests and the animals make use of both urban and wilderness habitats.  So they are more likely to come into direct contact with residents and given that mule deer are not as inclined to flee humans as are many other larger wildlife species, conflicts arise.  Often these conflicts involve dogs, many of whom are off-leash.  In the spring does will defend their fawns, occasionally escalating the conflict.  Other complaints include impacts on flower gardens, deer feces on the ground and the threat of deer being hit by cars or other vehicles. 

A handsome animal, yes, but one that “does not belong” in town, as we have so often heard. 

We heard that town life for deer is fraught with difficulty.  They have to navigate fences and traffic and avoid people who don’t like them.  Of course those who advocate this point of view fail to acknowledge, or understate that, in the wild deer are hunted in the fall.  They have to avoid predators.  They are in constant search for food, particularly through difficult winters and droughts.  But we also heard such people, apparently unaware of their own contradictions, that the in-town deer were fat and healthy and bore more young than their wilderness counterparts.  All the deer that we saw in Kimberley certainly looked healthy, fat and sleek and since they are nowhere far from wooded forests they obviously chose to be there.

In fact, residents who closely observed them assured us that the deer move freely from what we’d think of as classic deer habitat, the mountain forests and fields that border and penetrate the town borders, and the residential areas.  Furthermore many folks love to have them around.  Certainly the tourists enjoy seeing such magnificent wildlife up close.

Mule deer in KimberleyAnd so a team was assembled and with consummate skill managed to catch some twenty deer in Kimberley and nearby Marysville, mostly at the edge of residential areas, with a shooter firing darts into them, and then following the animal until, minutes later, they became drowsy, and then fell into a deep sleep.  Once unconscious the deer were examined for health, ticks, age, and sex (does were preferentially selected, and if they were with last year’s young an effort was made to get both, although the odd buck without antlers was also captured) and placed in a trailer, awakened with an antidote and given a calming tranquilizer.  Eventually the deer were driven to a carefully chosen release site far away from town sites.  Only one out of this original twenty died during this process, probably asphyxiating from recently ingested food.  The risk of that happening is why doctors, and veterinarians, order fasting for patients planning to have a general anaesthetic.  At least she was unconscious when she died and did not suffer.  If it had been the usual lethal cull all 20 animals would have died a brutally applied death.  

After we left the team moved north to another town, and as I write this, another deer was found killed by a cougar.  Remember, though, that most animals were not radio-collared so results are very preliminary.

But we saw what we were hoping to achieve, at least for now.  Both lethal culling and translocation (and I’d add fertility control) are unlikely to do much, if anything, to ultimately resolve concerns of people not wanting the deer in town, but they serve a political function by showing complainers (the only ones politicians heed) that “something is being done”.  When the relocation project for Kimberley was completed, Liz and I, later joined by a local friend who knew the area well, drove to the various sites where deer had been taken and there seemed to be as many as always.   More deer move in to take the places of those removed.   Reduced competition for resources means enhanced survivability and fecundity for those who remain, in town and in adjoining woodlands, something called the “rebound effect” or “compensatory mortality”.  

But it is a step taken away from simply killing the animals. 

The issue is complex.  Kimberley is showing an extremely progressive attitude by implementing the kinds of actions that reduce the attractiveness of the town to deer.  These include volunteers picking up apples fallen from trees; leash laws enforced for dogs in conjunction with public education; no edible garbage made available overnight; encouraging deer fencing and planting of flowers, trees and shrubs less or not attractive to deer as food and a stop to feeding deer.  The decidedly lower number of deer in town is a testimony to the effectiveness of these methods, although detractors claim it was a major cull of about 100 deer some years ago that did the trick.  I beg to differ simply because other communities that implemented lethal culls but did not take the steps Kimberley has taken to keep deer numbers down actually saw more, not fewer, deer after the killing.

And we were pleased to encounter many local people who assured us that whatever their views on deer in town, they were happier that they were not being killed.    One of the biggest downsides to the lethal culling, in my opinion, was how divisive it is within the community.  Kimberley’s city council is, to its credit, open and transparent (in contrast to neighboring Cranbrook) and is actively seeking an intelligent and compassionate solution to human/deer interactions.

Friday, 10 August 2012

Money wasted on killing wolves in Big Lakes MD


FOR IMMEDIATE RELEASE

Money wasted on killing wolves in Big Lakes MD 


August 8, 2012 -Alberta wolf bounty programs have been receiving attention recently.  The MD of Big Lakes is one example of numerous programs across the province, providing $300 for each wolf turned in since 2010.
In three years, Big Lakes has spent approximately $87,000 on wolves claimed through the bounty program.  People from the area as well as across the country are justifiably concerned that this is not an ecologically sustainable practice, nor ethically sound.  Many wolves killed had never killed livestock, many of them never would have.
The real shame is that the situation is being portrayed as having two sides; those who want to protect livestock and those who want to protect wolves.  The irony is that both of these objectives could be met simultaneously through working together.  A large amount of money has been invested within Big Lakes to kill wolves.  If preventing livestock losses is the goal, that money could have been better used.
Wolf Biologist Marco Musiani has spent more than a decade investigating the correlations between wolf depredations and raising livestock.  His research has indicated that culling wolves has not been shown to reduce depredation, immediately nor long-term.  Indeed, there is no evidence to show that indiscriminately killing wolves works as a long-term solution; depredations occur in areas that have been practicing lethal control for decades. 
Musiani has described this approach as
            “a short-term response to depredation that does not decrease wolf-depredation at a           regional scale nor over long-term”.
In fact, in certain parts of North America, killing wolves indiscriminately through trapping may have lead to increased depredation rates on livestock the next year.  This may be due to more wolves present in these areas following a disruption of their social structure or maybe wolves avoiding traps had learned to prey on livestock, and become more dependent upon domesticated animals as a food source as pack mates are removed.  Similar research on Dingo’s in Australia also documented pack disintegration (loss of social stability regardless of population size) following indiscriminate lethal control methods.  In this research there appeared to be an increase in attack rates on livestock when using poison baits.
Council members of Big Lakes MD have stated that preventative measures would be extremely expensive.  The following cost comparisons have been  made using information gathered by John A Shivik of the US Department of Agriculture  in his journal article in BioScience,  March 2006  (“Tools for the Edge: What’s New for Conserving Carnivores?”), and through personal communication with  wolf biologists, ranchers, and individuals providing electric fence workshops.
LIST of Cost Comparisons at $87,000 and duration of effectiveness
Fladry:  Cost estimate $781/km.  Could purchase 111.4 km. Duration 60 days
Electric Fencing:
Cost estimate -$250 for Super Energizer IV voltmeter- 50 mile range (if off grid $450)
- grounding plates $17 or rods (rebar)
-rebar posts every 10-12 feet ($600 to $700 per ton)
-stucco wire roll 100 feet $80, or ¼ mile tensile steel $25
Could purchase -348 voltmeters or 5118 grounding plates or 134 tons of rebar posts or 108,750 feet of stucco wire or 870 miles of tensile steel.
Duration of effectiveness would be unlimited as long as fence was properly constructed and maintained.
Turbofladry: Cost estimate $1328/km.  Could purchase 65.5 km.  Duration unlimited as long as fence was properly constructed and maintained.
Livestock Guardian Dogs: Cost estimate $300 - $1000 initial cost, then $500 per year.  Could purchase 108 guardian dogs (at $800 each).  Duration of effectiveness is approximately the lifespan of guard animal, typically years.
Carcass Removal Programs: Cost estimate 9¢/lb for ruminants where programs occur, with a minimum $75 charge.  If the average calf weighs 525 pounds at weaning 1160 calves could have been removed (at $75).  If the average cow weighs 1800 lbs, then 537 cows could have been removed.  In some parts of North America Fish and Wildlife will donate the truck and fuel costs.  Often funds are generated through rancher donations, conservation group donations, local taxes, and grants.  Duration of effectiveness is ongoing.
Range Riders:  Cost estimate $110/day for 2 months/year is $6,600.  In some parts of the US tourists are paying for the opportunity to do this.  Could provide  range riders for 13 ranches.  Duration of effectiveness is ongoing.
Fladry is a simple, inexpensive yet effective method for deterring wolves from entering a pasture.  It is a line of flags hung outside a pasture to dissuade wolves from crossing it and entering the area.
TurboFladry is Fladry combined with electric fencing, and although more expensive, this type of set up has proven very effective at keeping wolves out of a given area.  Initial costs may appear high, but the effectiveness and longevity for preventing depredations should also come into consideration.  As well conservation goals should also be included in the equation.
Husbandry practices where predators share the landscape with domestic stock can have a major influence on whether or not wolves will be attracted to an area.  Many predator-friendly ranching practices are inexpensive but an initial investment into providing this type of information and making it accessible to livestock producers is necessary.  Some of the more commonly used and discussed techniques include: confining or concentrating flocks during periods of vulnerability, establishing a human presence using herders, synchronizing birthing to reduce the period of maximum vulnerability, and pasturing young animals in areas with little cover and in close proximity to humans.  One of the most basic provisions for not attracting predators to areas where livestock is being raised is to remove dead livestock immediately from pastures.  Carcass removal programs occur in parts of Alberta where Grizzly bears are overlapping with ranchers.  Monitoring the health domestic animals regularly is critical to ensure dead and weaker domestics are managed, as these present more of an opportunity to wolves and other predators.  If a producer can remain “unattractive to wolves” by promptly managing for dead and sick livestock, as well as maintaining a strong human presence, livestock depredation rates should decrease in most areas.

Currently, there is no known place in North America where livestock is the majority of wolf prey.  This is not always the case in other countries where wolf populations have been all but decimated, such as Europe and Asia.   It becomes necessary to identify that wolves account for approximately 1 – 3 % of livestock losses on a large scale in North America, with weather, calving, and digestive problems a far larger concern for producers.

Wolf researcher and biologist Marco Musiani has identified that seasonal patterns can be seen in livestock calving, grazing practices, and variation in wolf pack energy requirements.  Understanding these patterns can help improve planning and management, and potentially alleviate conflicts. 

It is also paramount to consider the benefits and costs involved in ecosystem services that are provided for by wolves as a top predator and keystone species.  Wolves help to maintain the health, balance and biodiversity of natural ecosystems.  The Big Lakes Regional District has been advertising lake estates as a “natural way of living”, which is indeed something to boast about.  Especially as wilderness areas and natural predator-prey ecosystems are becoming more rare, and thus precious on a global scale, around the world. 
Residents of Big Lakes have indicated that the elk population in the area may be increasing, and wreaking havoc on canola fields.  This is just one other agricultural concern that may arise when tinkering with the natural system begins. 

Local sustainability also embraces a land ethic.   Aldo Leopold described this basic principal in the following way, “A thing is right when it tends to preserve the integrity, stability, and beauty of the biotic community.  It is wrong when it tends otherwise.”  Local sustainability is not just about taking care of the people in our community; it also requires stewardship of the plants, animals, land and water around us.
The MD of Big Lakes will be reconsidering the continuation of the bounty program this September. 

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Contact: Sadie Parr, sadester@hotmail.com