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Schoener [1968] collected information on the distribution of two Anolis lizard species (A. opalinus and A. grahamii) to see if their ecological niches were different in terms of where and when they perched to prey on insects. Data are in file lizards.txt. Perches were classified by twig diameter, their height in the bush, whether the […]

 

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Although Schoener [1968] reported four species of Anolis lizard in the paper, only two species were included in the data set. A Poisson regression does not constrain the total number of lizards in a given habitat condition, which may be misleading because the number of lizard cannot be unlimited. A different way of analyzing the […]

 

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Atlantic sturgeon () is a long-lived, estuarinedependent, anadromous fish. They were once a valuable and abundant resource along North America’s east coast. Habitat degradation, direct harvesting, and by-catch resulted in substantial declines in Atlantic sturgeon stock. In 2012 a segment of Atlantic sturgeon (New York Bight distinct population segment) was listed as a U.S. endangered […]

 

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A storm on July 4, 1999 with wind speeds exceeding 90 miles per hour hit the Boundary Waters Canoe Area Wilderness (BWCAW) in northeastern Minnesota, causing serious damage to the forest. A study of the effects of the storm surveyed the area and counted over 3600 trees to determine whether each of them was dead […]

 

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