BASELINE (n) - Information about what is "normal" or expected. This kind of information helps researchers measure change.
DATA (n) - factual information
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Dr. Polasek decided that, because her research questions were complex, they would take many years to answer. Her first goals were to establish a baseline and test out their monitoring method. To accomplish these goals, in the first year of the project the team would only set up cameras at sites in Bristol Bay. Haulouts in Bristol Bay are "established". This means that walrus are known to haul out there every summer. The animals in Bristol Bay are males. Although male walrus do not depend on summer sea ice, their behavior at haulouts will give researchers the baseline they need to make comparisons with females and calves in the north. As Dr. Polasek explained in her research hypotheses, she hopes to find out whether walrus at new haulouts in the Chukchi Sea will react differently to disturbances than walrus at established haulouts in the southern parts of the Bering Sea.
Installation took the research team on remote adventures as they installed cameras at five sites in Bristol Bay:
Round Island (West Main)
Round Island (First Beach)
Cape Peirce
Hagemeister Island
Cape Seniavin
The two videos below highlight the experiences of our scientists as they set up cameras for the 2011 summer season.
VIDEO: Round Island
Join our researchers as they head out to Round Island to place the first set of cameras. (3 minutes)
How did you travel to Round Island?
There was a lot of planning necessary before we could travel to Round Island. Round Island is very remote, and we had to make sure that we had all the equipment and materials that we would need to set up the cameras. If we forgot something, we wouldn’t be able to run back and get it. For our travel out there we had to schedule multiple flights and work with partners and other scientists to make travel plans. Once all the planning was done, we drove from Seward to Anchorage and then got on a small plane and flew from Anchorage to Togiak. We flew on the same plane that delivers groceries for the store. The town of Togiak is located at the head of Togiak Bay, which leads out into Bristol Bay. It lies in the Togiak Wildlife Refuge and is the gateway to the Walrus Island Game Sanctuary. Togiak is a small traditional Yup’ik Eskimo village with a fishing and subsistence lifestyle. We spent the night in Togiak in a U.S. Fish & Wildlife bunkhouse, and then took a helicopter to Round Island. The helicopter could fit the pilot, two people and our gear, but it was a tight squeeze. Some of our gear had to be tied to the outside of the helicopter so we could make it out in one trip. The helicopter was an amazing way to see Bristol Bay and Round Island.
You can see the steep cliffs and rocky beaches of Round Island. These cliffs are one of the reasons that we picked Round Island to set the cameras up on, as they would give us a good vantage point over the walruses. You can also see the cabin where we would spend three nights while we were setting up the cameras.
Once we had unloaded all of our gear and got set up in the cabin, it was time to get to work. We walked the length of the island, about two miles, to pick the best camera site that would allow us to capture the walruses on their haulout and the surrounding area. We then had to carry all the camera equipment to the site we chose. Some of the materials, like the car batteries and all the tools, were very heavy. The whole process took about twelve hours to set up one of the camera pairs. There are several haulouts on Round Island. We chose two sites to monitor: we put cameras at First Beach and West Main Beach.
VIDEO: Cape Seniavin
Learn about the researchers’ next adventure: placing remote cameras on Cape Seniavin. (1.5 minutes)
How did you travel to Cape Seniavin?
Just like Round Island, we had to spend time planning and preparing for the trip to Cape Seniavin. This time we flew from Anchorage to a town called King Salmon. King Salmon is a small town of about 400 people on the western Alaska Peninsula. It’s located at the Naknek River about 15 miles from Bristol Bay. Instead of a helicopter we took a small fixed-wing plane from King Salmon to Cape Seniavin. We flew over King Salmon and the Naknek River.
As we approach Cape Seniavin, you can see the steep sandy bluffs and the beaches below. Like the cliffs on Round Island, the bluffs provide a great vantage point to set up the cameras to view the walrus haulout. No one lives at Cape Seniavin, and there is no landing strip. We landed right on the beach, with the waves crashing next to us. It was beautiful, but it does give you an idea of how remote we were.
This time we had to carry all the equipment up the steep bluff to the spot where we wanted to place the cameras. Then we picked a good site for installing the cameras and got to work. We only chose one site at Cape Seniavin. The whole process this time took about eight hours to set up the cameras. We were much faster the second time around.
Once the cameras were up and we had tested them, it was time to leave. Just like at Round Island, the cameras will stay up all summer watching the walrus, and in the fall we will travel back and pick them up. Then next spring we get to do it all over again.
With their cameras in place, data collection began! Since the scientists were trying to observe walrus disturbances, it was very important that they not disturb the walrus during the actual study. For this reason, they visited the Bristol Bay haulouts in early spring and late fall, when the walrus were not present. This meant many months of images were recorded! Watch the two videos below to learn about the camera timing systems and what the researchers hoped to capture on film.
VIDEO: TAKING Pictures
Jll Prewitt describes how often the cameras are taking pictures and how the researchers chose to take pictures at those times. (1.5 minutes)
How often are these cameras taking pictures?
We’re going to end up with a lot of pictures, because we’re limited just by the camera card size, but we’re trying to take them as often as possible. In the early morning hours they’re just going to be taken once an hour from 6am to 10am, then at 10am they’re actually taking pictures once a minute. And then in the later evening hours they’re being taken – from 6pm to 10pm – once an hour again.
And the reason why we wanted to take them once a minute during the majority of the time is to be able to actually detect a disturbance. So, if we were just taking them once an hour all day, we might just, you know, in one picture have 300 walrus, and then in the next picture have zero walrus and we don’t know why. But if we’re taking them once a minute we might be able to actually see a vessel go by, or a plane land, or something else happen and all of the herd disperse or abandon the haulout all at one time, so we wanted that fine scale, once a minute. So there will be thousands of pictures at the end of the summer.
VIDEO: COLLECTING Data
Jill Prewitt explains what information she’ll be collecting from the pictures. (1 minute)
What data are you collecting from these pictures?
So what we’re recording, what we’re looking at primarily, is presence or absence of walrus in the picture. If we see walrus, what we’re going to try to do is count them as much as possible. Then we’ll take a look closely at the herd and see if we can detect any juveniles, especially calves, in the pictures, so we can get kind of an idea of who’s using that haulout.
And then disturbance of course is one of our biggest questions, so we’ll be looking at the behavior. Whenever there’s walrus in the picture we’ll be looking at them serially, looking at them one after another, to detect whether walrus are reacting to disturbances such as lifting their head, moving, shifting around, or completely abandoning the haulout, and what might be causing that.
So what data did these cameras really capture? What did Dr. Polasek and her team learn? Click "Results" to find out!
