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Tuesday, January 30 • 1:40pm - 2:00pm
SMALL MAMMALS: Movement Ecology of Marten (Martes americana) in the Eastern Upper Peninsula, Michigan

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AUTHORS. Bradford Silet, Gary J. Roloff - Michigan State University; Eric Clark, Joseph Lautenbach, Russell Aikens, Aimee Baier, John Powell - Sault Ste Marie Tribe of Chippewa Indians; Steve Sjoren, Hiawatha National Forest

ABSTRACT. As American marten (Martes americana) move they respond to biotic and abiotic factors.  For species that are vulnerable to predation and trapping like marten, movement behaviors in response to weather and season can inform harvest regulations and research activities.  We examined the daily, seasonal, and weather related movements of marten in the Hiawatha National Forest (HNF) in the eastern Upper Peninsula of Michigan. We GPS collared 12 (11 males, 1 female) marten and attempted to collect a location every 15 minutes.  We downloaded 7,930 locations (660.8 locations/marten), and for each successive GPS fix we calculated average hourly rate of movement by season. To model abiotic factors affecting movement rates, we used hourly rate of movement as a dependent variable in generalized linear mixed models with fixed effects that included interpolated weather estimates from Daymet.  Individual marten and season were used as random effects in the models.  On average, we found that marten moved 13.3 m/min, and that hourly movement rates did not differ throughout a 24-hr day. We also found that marten moved significantly less in fall than winter, spring, and summer.  We failed to find a significant weather effect on marten movement rates, but limited evidence supported the hypotheses that daily movement rates increased as: 1) maximum daily temperatures decreased, and 2) as precipitation increased. Our results indicated that fall may be a difficult time to capture marten as movement rates are significantly lower, and that weather cannot be used to reliably predict when marten move.

Tuesday January 30, 2018 1:40pm - 2:00pm CST