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The typical winter season for obligate hibernators is characterized by periods of torpor interrupted by periodic, euthermic arousals, during which body temperatures and heart rates are restored to more typical levels. The cause and purpose of these arousals are still not clear; the question of why hibernators may return periodically to normal ...
Some animals seasonally go into long periods of inactivity, with reduced body temperature and metabolism, made up of multiple bouts of torpor. This is known as hibernation if it occurs during winter or aestivation if it occurs during the summer. Daily torpor, on the other hand, is not seasonally dependent and can be an important part of energy ...
Winter rest (from the German term Winterruhe) is a state of reduced activity of plants and warm-blooded animals living in extratropical regions of the world during the more hostile environmental conditions of winter. In this state, they save energy during cold weather while they have limited access to food sources.
As holiday lights brighten streets and the season of cheer unfolds, Dec. 21 marks the winter solstice this year -- a reminder that the darkest day of the year is upon us. For the more than 6 ...
Even though the "meteorological winter" in the Northern Hemisphere runs from the first of December until the last day of February, the actual moment of the winter solstice this year will be at 10: ...
The winter solstice is Dec. 21 in the Northern Hemisphere, marking the first day of winter. According to the organization Sunrise-Sunset, sunrise in Asheville will occur at 7:34 a.m. Dec. 21. The ...
Using the lowest BMR value measured in Arctic foxes, an average sized fox of 3.5 kg (7.7 lb) would need 471 kJ/day during the winter to survive. In Canada, Arctic foxes acquire from snow goose eggs at a rate of 2.7–7.3 eggs/h and store 80–97% of them. Scats provide evidence that they eat the eggs during the winter after caching.
The first day of winter is marked by the winter solstice, which occurs when the Earth’s axis tilts farthest from the sun. This year, the solstice happens at 3:27 a.m. CT on Dec. 21. While the ...