Will a plague of "winter ticks" threaten Adirondack moose?
ncpr radio-north country public radio
Mar 24, 2015 — For the first time, scientists working in the North Country are trying to get a much more specific census of how many moose live in our region. They want a better idea of where these giant animals are living, their health and their success reproducing.
One of the big questions they're asking is whether moose in the Adirondack Park could be threatened by winter ticks, a parasite that's killing moose in other parts of the US and Canada.
winter tics embedded in the body of a Moose
In states like Maine and New Hampshire, the once-strong moose population has been hit hard by a plague of ticks and some researchers think climate change may be part of the problem.
A wave of tiny bloodsuckers that can bring down an 800-pound animal
"The way these ticks work, a single tick produces thousands of young ticks," says Jacqueline Frair, associate director of the Roosevelt Wildlife Station at the SUNY College of Environmental Science and Forestry. "A moose can walk by and pick up ten thousand ticks at once."
Frair says the threat of winter ticks helped spark the study of moose populations here.
"We've been talking for years about the need to study moose and understand what their population numbers are. Are they growing, are they declining? What are the limits to their growth? We decided we need to do that now."
Moose having lost its skin to winter tic infestation
By some estimates, winter ticks have contributed to a forty percent decline in moose populations in some parts of the US. But so far, infestations on anything like that scale haven't hit the Adirondacks.
So far, no tick plague in the Adirondacks
We've been talking for years about the need to study moose...we decided we need to do that now
"The moose we caught only had two or three ticks on them," says Ed Reed, Regional WIldlife Biologist for New York's Conservation Department, based in Ray Brook.
Reed says a crew that captured and examined moose this winter found the animals in remarkably good shape compared with tick-infested animals further east. "They just commented that it was nice to see healthy, happy moose."
One of the questions being asked is whether climate change combined with rising moose population densities could spark a tick outbreak here. Scientists say the parasites have expanded their range steadily.
"When we captured our moose, we did pull a winter tick or two off, but we just don't have those high loads yet and we think part of the story is moose density alone," says Jacqueline Frair.
With fewer moose spread over wide swaths of the Adirondacks, it's possible that ticks simply aren't finding opportunities to feed and reproduce in massive numbers, as they do where moose are clustered together.
The research being done this winter is expected to shape a management plan for moose, one that will be based on a far clearer understanding of their numbers, health and distribution.
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