{"id":18330,"date":"2020-09-09T16:26:49","date_gmt":"2020-09-09T16:26:49","guid":{"rendered":"http:\/\/www.uwb.edu\/?p=18330"},"modified":"2023-06-08T18:26:24","modified_gmt":"2023-06-08T18:26:24","slug":"arctic-grayling-cascades","status":"publish","type":"post","link":"https:\/\/www.uwb.edu\/news\/2020\/09\/09\/arctic-grayling-cascades","title":{"rendered":"How Arctic fish survive in North Cascades lake"},"content":{"rendered":"\n
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Upper Granite Lake. Photos, video courtesy of Jeff Jensen<\/figcaption><\/figure>\n\n\n\n

足彩app哪个是正规的re is one lake in Washington where Arctic grayling still survive. And despite the pandemic and restricted operations for the University of Washington, a team led by UW Bothell Teaching Professor Jeff Jensen<\/a> has continued its research on this precarious fish through the summer of 2020. <\/p>\n\n\n\n

足彩app哪个是正规的 researchers found conditions at the lake had changed significantly from the previous year, yet the fish were adjusting. <\/p>\n\n\n\n

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Arctic grayling (Thymallus arcticus)<\/figcaption><\/figure>\n\n\n\n

Jensen is building on research started by David A. Beauchamp in the 1980s when he was a UW graduate student and Jensen was an undergraduate. This population of Arctic grayling was thought to rely on a single snow-fed stream for spawning. By following up on Beauchamp\u2019s work<\/a>, Jensen suspected he might find indications of climate change.<\/p>\n\n\n\n

足彩app哪个是正规的 Arctic grayling is a freshwater member of the salmon family about the size of a trout. In the 1940s, state fisheries workers planted the fish in a few North Cascades lakes for anglers, who also caught cutthroat trout. 足彩app哪个是正规的 grayling were able to reproduce only at Upper Granite Lake. Jensen\u2019s research documents the environment on which the grayling depend, including water temperature and streamflow from melting snow.<\/p>\n\n\n\n

Adventures in field work <\/h2>\n\n\n\n

足彩app哪个是正规的 lake in the Mount Baker-Snoqualmie National Forest is about 6 miles off Highway 20 near Marblemount. It\u2019s a challenging hike up an abandoned logging road and across terrain without an established trail. In summer 2019, Jensen made two hikes to the lake with Prieuer Pretorius, a senior who graduated from UW Bothell in 2020 in Biology. <\/p>\n\n\n\n

In summer 2020, Jensen made five (actually four-and-a-half) hikes to the lake, accompanied at times by Anders Wennstig, a senior majoring in Conservation & Restoration Science; recent graduates Quinn Moldestad (Biology \u201918), Isabel Rodriguez (Biology \u201920) and Alex Wachter (Earth System Science \u201920); and Bellingham hiker Pete Horst, who heard about the project and volunteered to help pack gear. <\/p>\n\n\n\n

Because of the coronavirus pandemic, everyone had to travel in their own car, stay in their own tent and maintain a physical distance on the hikes and at the lake, Jensen said. <\/p>\n\n\n\n

What was the half-trip? On their first attempt in mid-June, they were blocked by a big creek about a third of the way in to the lake. 足彩app哪个是正规的y returned four days later with a 20-foot ladder, which was just long enough for them to bridge the creek. <\/p>\n\n\n\n

Finally reaching Upper Granite Lake, the researchers found it was still frozen over, Jensen said, but they were able to take some video from a drone and drop temperature monitors in a slice of open water. <\/p>\n\n\n\n

Spawning surprise <\/h2>\n\n\n\n
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