Western Roadkill Observation System. List your observations. : March 2018

Thursday, March 29, 2018

FIRST HABITAT USE STUDY SUGGESTS ENDANGERED ALBANY POSSUMS STAY CLOSE TO HOME



Why did the possums cross the road in Albany? 

  Bronte Van Helden, UWA Albany science honours student, spent long nights stalking possums in search of an answer to that question.
Once widespread across south-west WA, western ringtail possums, Pseudocheirus occidentalis, are an endangered species.
Habitat loss and fragmentation has reduced their range by up to 90%, according to DPaW.
While they are a common sight in urban bushland and backyards in Albany, possums often end up as roadkill while crossing roads to forage for food or seek shelter.
“Road strike is also thought to be a growing problem,” she says.
To find out how far these possums roam, Bronte led the first comprehensive study of western ringtail possum habitat use in Albany.

A KNOWLEDGE GAP

Albany is home to one of WA’s three stronghold populations of western ringtail possums.
Not much is known about the local group compared to the other two stronghold populations at Busselton and Manjimup, Bronte says.
She suspects this is because possums are “notoriously difficult to capture” and a tougher task than she imagined.
Bronte traipsed through remnant bushland on Mt Clarence, Mt Adelaide and Mt Melville on winter nights.
Sometimes it took until 2am to spot, capture and collar an adult possum without young.
A DPaW ranger shot a tranquiliser dart into the possum’s rump and the sedated marsupial was caught in a ‘landing blanket’ as it fell from the tree.
Nine possums were captured, weighed, measured, fitted with tracking collars then released.














IMAGE|JENNI FLOTTMANN                                                               BRONTE VAN HELDEN
                 
Adult western ringtail                                                                Fitting  radio collar to a       possum being released.                                                            captured possum.     
         
                                                 




IMAGE|JENNI FLOTTMANN

Weighing a sedated western 
ringtail possum.                                           



HOW FAR DO POSSUMS ROAM?

Tracked possums’ movements across Albany suggests they stay close to home.
GPS loggers on the collars recorded their position every 15 minutes from 5pm to 7am and every 30 minutes between 7am and 5pm.
Bronte found that Albany possums roam just under a hectare, similar to Busselton possums, but much less than Manjimup possums who travel up to 2.5 hectares.
The possums weren’t crossing the road as frequently as Bronte expected.
She says the possums’ small home range could be because remnant bushland provides plenty of resources so they don’t need to go far.
She also tracked the possums on foot to see what trees they hung out in during the day and night.
“The Albany possums’ habitat use is quite unique,” she says.
“They tend to use marri and jarrah trees and possum nests, called dreys, as refuge.”
The Manjimup group choose the same trees but prefer hollows to dreys, while Busselton possums use dreys but live in peppermint trees.
This indicates the groups are quite flexible to their environment, Bronte says.

COLLECTING INFORMATION FOR CONSERVATION

The next step is to work out how many possums call Albany home, Bronte says.
“From what I saw… there seems to be a lot, but density estimates are currently a work in progress,” she says.
“We would love to know the numbers… to see how important this population is.”
Bronte says her study could help conserve the endangered species.
The City of Albany, Department of Parks and Wildlife and Oyster Harbour Catchment Group supported the study.

Tuesday, March 20, 2018

Wild and Free, But Is Roadkill Safe to Eat?


Roadkill reindeer I think



BY AMY HALLORAN | APRIL 18, 2011


“Well, I’m the king of roadkill,” laughed Paul Opel, a music instructor at Green Mountain College in Vermont. “I don’t hunt at all but I love wild food so I’m always really happy to get it.”

Opel has been discovering this kind of road food for over 30 years. The habit began when he was in his twenties and a pheasant collided with his car.

“Here’s this completely fresh, healthy bird,” he recalls thinking at the time, “and if it stays here it’s just going to rot, and if it comes home with me it will be dinner.”

Preparing that pheasant was the first time he’d ever dressed a bird. Over time, he’s developed his own rules for taking roadkill. Winter, he thinks, is a good season because the animal is immediately refrigerated. During the summer he is warier of what he might take. Because he’s not doing it for subsistence, he’s liberal about what he rejects.

The practice of eating roadkill is part of a waste-not, want-not philosophy that drives other people, some of them previously vegans, to scavenge meat in a fashion that is almost sanctioned by PETA, which says on the subject:

“If people must eat animal carcasses, roadkill is a superior option to the neatly shrink-wrapped plastic packages of meat in the supermarket.”

People who eat roadkill might be hunters who know their way around a dead animal, or people who call themselves freegans, and are used to eating from unregulated sources, like Dumpsters. Some practitioners have written how-to guides, such as the zine quoted in Sandor Ellix Katz’s book about America’s underground food movements, “The Revolution Will Not Be Microwaved.”

State by state rules vary on the legality of taking home roadkill. In many states, one can actually get on the local game warden’s list and wait for a call.

In Vermont, Iliana Filby got a 157-pound doe, which had been hit by a car but not killed outright. The warden phoned her and asked if she wanted the deer, and she met him at the site where he had dispatched the wounded animal. She took the carcass to deer shed, and enlisted the help of several friends to deconstruct the animal. In the end, the Vermonter got 60 to 70 pounds of meat for her freezer. An ambitious cook, she’s been learning how to butcher farmed animals, and looks forward to using her skills again. “I was on the list for this winter and I haven’t gotten one yet,” she said. “Eventually I’ll get another one.”

All roadkill in Alaska belongs to the state. Troopers will take the hit animal to volunteers that will butcher and process the meat for distribution to charities. In New York, motorists can claim roadkilled deer, moose and bear once a uniformed officer investigates the scene and issues a tag.

Food safety issues regarding roadkill are not widely discussed in traditional food safety circles. Still, a few people were willing to speculate on possible risks in a roadkill situation.

“When you’re a hunter you control the scenario, it’s so very different than finding something and having to deal with the unknown questions,” said Deb Cherney, of Cherney Microbiological Services in Green Bay, WI.

“When you hunt it’s a stalk and kill process, and you handle the animal in a timely fashion. You harvest it and you eviscerate the animal, you process it properly and deal with it in its prime condition.”

An experienced hunter herself, she elaborated on the differences between game and roadkill. Obviously, with roadkill you don’t know if you’re harvesting a healthy animal, Cheney noted. Whether you or someone else struck the animal may be a safety consideration. For example, before you recovered the animal, what could have happened to it? Did the animal walk with open wounds, possibly picking up opportunistic pathogens?

While Cheney has never handled roadkill herself, 45,000 carcasses are annually salvaged or removed from roads because of car/deer collisions in the state of Wisconsin. Most of these accidents occur during the deer breeding season, in October and November, and the fawning season, in May and June. People claim the deer by contacting local officials to secure a tag.

Susan Vaughn Grooters, director of Research and Education
 at S.T.O.P., Safe Tables Our Priority, also drew parallels between hunting and roadkill.

squirrel roadkill
“The risks that exists with roadkill will be similar from a foodborne illness perspective as those from hunting wild game,” said Grooters. “So with deer as road kill, one would want to consider risks that already exist in consuming venison, meaning chronic wasting disease, toxoplasmosis gondii, and other infections. Zoonoses are species specific, so other roadkill, say squirrel or raccoon, will have disease associations unique to their species.”

Grooters also pointed to other risks. Game meat has not been raised under the care of veterinarians. Animals that go to slaughter, in many situations, have a food safety inspector on site. E. coli O157 is found in ruminants, such as moose, deer and elk. Given the nature of vehicular collisions, the chance for bacterial contamination would be a concern because of gut spillage from a ruptured bladder or torn intestines.

“If the animal has endured internal damage there can be other risks,” said Grooters. “If an animal was hit, the force of being hit by a car can cause internal damage that being shot through the head or the heart — that killing with a gun — wouldn’t cause.”

While roadkill education courses are hard to find, hunter education courses are mandatory in every state. Safe animal handling practices, among other topics, are covered in these classes.

The Michigan Hunting and Trapping Digest, which hunters get along with their licenses, has a section on handling and processing deer and other wild game.

Each fall, the state of Michigan’s Department of Agriculture and Department of Natural Resources and Environment issue a press release to remind hunters and others about food safety processing guidelines. The state has a venison-processing booklet available online and in print for people who want to process on their own. The state advises that those who want help should select a certified deer processor.

They also get other advice. Last season, hunters in Cahoun and Kalamazoo counties were warned not to eat liver from deer or elk because of a significant oil spill on the Kalamazoo River.

Similarly, hunters in Vermont are routinely advised not to eat the liver from moose or deer because of high cadmium levels.

Vermont has about 280 certified hunter education instructors and people seeking hunting licenses in Vermont go through at least a 12-hour course, said Chris Saunders, the hunter education coordinator for the Vermont Fish and Wildlife Department. The instructors teach approximately 250 classes a year, and about 5,000 new hunters are certified annually.

Not every class gets to takes apart an animal, said Saunders, but if possible instructors try to get a roadkilled deer from the local game warden to demonstrate the proper ways to field dress game. The class manual and most state extension offices also provide information on safe handling of wild game.

Saunders said many students are young to middle adolescents, often from hunting families,
although the training program is seeing more adults because of the interest in free range meat. While they might only have an interest in hunting, perhaps a few may be interested in turning to roadkill as well.

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