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Lepus Americanus - College Papers

Lepus Americanus

(snowshoe hare) belongs to the Phylum: Chordata, Class: Vertebrata, and Order: Mammalia. is common to the northern boreal forests of North America extending south into higher elevations of the Rocky and Appalachian Mountains. It's main diet consists of plant shrubs in summer and in winter forage on ground vegetation by digging feeding craters into the ground (Gilbert, 1990).
Experiments conducted by Krebs et al. (1986), set out to determine responses of to extra natural food supplemented during 1981 to 1984 in the period of a decline phase during the ten-year cycle. It is not known if decline phase is driven by winter food shortage. The experiment consisted of, one experimental and two ...

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techniques, it was found that probabilities for survivorship in experimental grid (0.79+0.10) were similar to that of control grids (0.71+0.07; 0.56+0.07). Results yielded that extra food intake and cover provided from branches may have not been helpful in increasing survivorship. No differences were measured in reproduction of percentage in adult females caught lactating between control and experimental grids. Based on experiments conducted by Keith and Windberg (1978), we should expect reduced weight loss during the winter months if natural feeding was effective in experimental grid. Results gathered based on growth rates and size yield a reduced weight loss on experimental grid in 1981-1982 (Experimental: -0.04+0.13; Controls: -0.28+0.07 & -0.11+0.30). Such data is not significant to rule that supplemented food is effective.
There is no indication to that decline phase of ten-year cycle is driven by winter food shortage. Extra food intake may not be responsible for higher growth ...

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PAPER DETAILS

Added: 5/2/2005 07:58:27 PM
Category: Science & Nature
Type: Premium Paper
Words: 381
Pages: 2

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