Starting on Monday, March 31, we kick off enough another quarter of terrific talks as part of the Wildlife Science Seminar! Professor Chris Grue of the School of Aquatic and Fishery Sciences will be leading the course this spring, and topics range widely from killer whales to bats in the Peruvian Amazon to birds in suburban Seattle.
The Wildlife Seminar will meet on Mondays from 3:30 to 4:30 p.m. in Architecture (ARC) Hall, Room 147. Undergraduate students may register for credit under ESRM 455; graduate students under ESRM 554.
The public is invited to attend, so check out the full line-up below and mark your calendars!
“Mercury Contamination from Gold Mining in Bats within Different Feeding Guilds in the Peruvian Amazon”
Anjali Kumar, Postdoctoral Research Associate, Massachusetts Institute of Technology
“Amphibian Life History in the Arid Southwest”
Meryl Mims, Ph.D. Candidate, School of Aquatic & Fisheries Sciences
“I May Like the Suburbs After All: The Case of Cavity-Nesting Birds in the Greater Seattle Area”
Jorge Tomasevic, Ph.D. Candidate, Wildlife Science Program, School of Environmental and Forest Sciences
“Reducing the Hazards Powerlines Pose to Birds”
Melvin Walters, Puget Sound Energy
“A Grizzly Answer for Obesity”
Kevin Corbit, Senior Scientist, Amgen Inc., Seattle
“Are We Loving Sea Pandas to Death? The Relationship Between Boats and Noise in Endangered Killer Whale Habitat”
Juliana Houghton, MS Candidate, School of Aquatic & Fishery Sciences
“Post-release Movements, Survival and Landscape-Scale Resource Selection of Fishers Reintroduced into Olympic National Park”
Jeff Lewis, Ph.D. Defense, Wildlife Science Program, School of Environmental and Forest Sciences, UW; and Washington Department of Fish and Wildlife
“Laughter and Well-Being in Animals”
Jaak Panksepp, Baily Endowed Chair of Animal Well-Being Science and Professor, Integrative Physiology and Neuroscience, Washington State University
No seminar (Memorial Day)
“Aquatic Herbicides and Amphibians: Applying Phenology to Toxicity Testing”
Amy Yahnke, Ph.D. Defense, School of Aquatic & Fishery Sciences
But for all the iconic footage of salmon runs, this annual rite of passage and predation has gone largely unstudied from the point of view of individual bears—especially outside of easily observable areas.
The challenge is that observations of bears are generally too few and too close to reveal natural feeding behavior, so most of what we know about the bear-salmon relationship comes from fish carcass surveys: We see what’s been eaten, but not always who did the eating, or how often or where or when. That leaves a lot of unknowns, including how many bears hunt along salmon spawning-streams, and whether bears return to the same stream year after year.
To answer these questions and others, two units in the College of the Environment—the School of Aquatic and Fishery Sciences (SAFS) and the School of Environmental and Forest Sciences (SEFS)—have launched a coordinated research project.
Professors Aaron Wirsing, left, and Tom Quinn. Since 1993, Quinn’s research has explored a number of dimensions of the salmon-bear relationship, including the effects of stream characteristics on bear predation rate, size selectivity, density dependence, evolutionary consequences and links to nutrient cycling.
Led by SAFS Professor Tom Quinn and SEFS Professor Aaron Wirsing, this new study is investigating coastal brown bear (Ursus arctos) abundance and behavior along sockeye salmon (Oncorhynchus nerka) spawning streams in Bristol Bay, Alaska. Their project draws from decades of existing salmon research and introduces a completely new perspective by exploring individual brown bear behavior, including monitoring bears through remote cameras and collecting hair samples for DNA analysis.
The research team is housed at the Fisheries Research Institute, a program within SAFS, and based in the village of Aleknagik. In addition to Professors Quinn and Wirsing, the crew includes SAFS graduate student Curry Cunningham and Professor Lisette Waits from the University of Idaho.
Their work began in 2010 by placing the first cameras along salmon-spawning streams in the Wood River Lakes System. In July 2012, they then deployed barbed wire across three streams to begin snagging tufts of hair from foraging bears. This past summer, they expanded the research area and deployed two barbed wires each on six streams. One wire per stream is paired with a remote camera trap to document what happens when bears encounter the wires. The wires are set just high enough—55-60 centimeters—for bears to step gingerly over them, often leaving small tufts of hair behind (when good samples are collected, they call it a “good hair day”). The hairs, in turn, yield DNA samples that help researchers identify individual bears.
A tuft of brown bear hair snagged on a wire.
The study is designed to be noninvasive, so among the questions to answer was whether the wires would impact or otherwise disrupt bear behavior and hunting. Judging from the camera images so far—including many taken at night (see slideshow below)—the bears appear largely unconcerned with the wires, often stepping over and under multiple times in a single encounter (in the process, of course, leaving collectible tufts of hair).
In the first year of hair sampling last summer, the team collected 74 tufts from wires along Bear, Happy, and Hansen creeks. They have analyzed 41 of the samples so far and have successfully identified 15 different individuals—eleven females, four males, and all brown bears.
Field work is just winding down for this summer (at left, check out a slideshow of photos Professor Wirsing took a few weeks ago). They plan to continue the project for a few more years, and as researchers sort through several hundred new samples to analyze, they’re excited to open this window into a largely unseen and unstudied realm of bear behavior.
“Outside of a few highly visible areas, such as the McNeil River, the behavior of brown bears foraging on salmon has been largely shrouded in mystery,” says Wirsing. “We hope our work will reveal how feeding and social behavior of individual bears are shaped by the arrival of migrating salmon—and by extension how coastal brown bear populations might be affected by changes to the size and timing of salmon runs.”
*** Super Salmon In the short video clip below, Professor Wirsing captures sockeye salmon swimming up Hansen Creek, which in some places is only a couple inches deep as it approaches Lake Aleknagik. You’ll get a glimpse—a tiny glimpse, mind you—of the herculean effort it takes for salmon to reach their spawning grounds. Their exertion is nothing short of heroic during this brutal slog. After all, even when they manage to dodge the maw of a hungry grizzly, they still have to muscle their way through narrow, shallow streams to reach their final destinations. In some cases, a few of the larger males get too fatigued to maneuver through the shallowest sections and end up stranded. Those beached souls then sometimes have to suffer through gulls pecking their eyes out as a final insult. No question, it’s an unforgiving business.
The Wildlife Science Seminar series for the 2013 Spring Quarter kicks off this coming Monday, April 1, with Professor Julian Olden from the School of Aquatic and Fishery Sciences (SAFS) with his talk, “Invasive Species: Envisioning Alternative Global Futures in the New Pangaea.”
Hosted by Professor Christian Grue—an adjunct with the School of Environmental and Forest Sciences, and an associate professor with SAFS—the seminars are held on Mondays at 3:30 p.m. in Kane Hall 130. (Undergraduate students may register for credit under ESRM 455, and graduate students under ESRM 554.)
The public is welcome and encouraged to come!
Check out the rest of the schedule below:
April 8 Animal Wise: The Thoughts and Emotions of Our Fellow Creatures Virginia Morell, author and contributing correspondent, Science Magazine
April 15 Reptiles: Up Close and Personal Issac Petersen, “Son of Reptile Man,” The Reptile Zoo, Monroe, Wash.
April 22 The Complexities and Challenges of Managing Washington’s Fish and Wildlife Brad Smith, commissioner, Washington Department of Fish and Wildlife
Dean Emeritus, Huxley College of the Environment, Western Washington University
April 29 Measuring Ecological Integrity on Rangelands: Why and How? Linda Hardesty, School of the Environment, Washington State University
May 6 Exposure of Northwest Amphibians to Aquatic Herbicides Amy Yahnke, School of Aquatic & Fishery Sciences, UW
May 13 Ducks Unlimited in the Pacific Northwest Mark Petrie, manager of conservation planning, Ducks Unlimited, NW Region
May 20 An Endangered Songbird in Central Texas: The Population Dynamics of the Black-capped Vireo (Vireo atricapilla) Lauren Seckel, Wildlife Science Group, School of Environmental and Forest Sciences, UW
May 27 Memorial Day
June 3 Using Non-invasive Techniques to Examine Patterns of Black Bear Abundance in the North Cascades Ecosystem Kristin Richardson, Wildlife Science Group, School of Environmental and Forest Sciences, UW