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Osprey Campaign 234

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A study carried out by an international group of scientists concluded that the decline in the cutthroat trout population in Yellowstone is not likely to be due to environmental disturbance: during the past 30 years, the trout population has declined just as significantly in the northern half of Yellowstone Lake as it has in the southern half. The study also concluded that osprey nest success at Yellowstone Lake is declining due to anthropogenic impacts on the lake. The findings suggested that osprey nest success could be increased by treating the lake as a sub-alpine habitat.

A new analysis of available data suggests that the declines in the Yellowstone cutthroat trout population are not due to dramatic changes in lake water levels, and that cutthroat trout populations have declined over the past 100 years in two different areas of Yellowstone Lake. Changes in predation rates by osprey are thought to be the major cause for the observed declines.

Wildlife and Parks officials announced closer monitoring measures and traps to prevent wild animals from reaching the nearby National Cougar Center trap site in Tremonton, UT. The environmental impacts of "cougar feeding" can be devastating for already embattled wild cougar populations. Passengers travelling within a 500-mile radius of the trap site should be aware of their surroundings when they pass through the area. d2c66b5586


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