Yellowstone National Park Migration & Yellowstone Elk A key finding of the study was that only 70 percent of migratory elk were pregnant, compared to 90 percent of residents—a rate more typical of Rocky Mountain elk. The study shows that the hotter and drier summer conditions of the last two decades, coincident with the long-term drought widely affecting the West, have reduced the duration of the spring period when tender new grasses are available to elk. This makes it harder for female migratory elk to find the forage they need to both nurse a calf and breed. phys.org/news/2013-06-migration-longer-strategy-yellowstone-elk.html
Posted on: Thu, 06 Jun 2013 16:28:16 +0000
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