WFC 151 2008-midterm1
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WFC 151 FIRST MIDTERM FALL 2008 Name____________________________________________________ Peninsular bighorn sheep are threatened with extinction, primarily because of diseases that are causing mortality . One conservation option is to l eave diseases untreated; the argument is that natural selection will remove disease-vulnerable sheep, thus the surviving population will be disease-resistant. Evaluate the merits of this option. (3 pts) Animals may use cues in habitat selection, a nd also when deciding whether to disperse. Briefly explain why animals use cues, and for each of these decisions (habitat selection, dispersal), describe two cues t hat animals might use i n their decision. (5 pts)
Transcript of WFC 151 2008-midterm1
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WFC 151 FIRST MIDTERM FALL
2008
Name____________________________________________________
Peninsular bighorn sheep are threatened with extinction, primarily because of diseases
that are causing mortality. One conservation option is to leave diseases untreated; the
argument is that natural selection will remove disease-vulnerable sheep, thus thesurviving population will be disease-resistant. Evaluate the merits of this option. (3 pts)
Animals may use cues in habitat selection, and also when deciding whether to disperse.
Briefly explain why animals use cues, and for each of these decisions (habitat selection,dispersal), describe two cues that animals might use in their decision. (5 pts)
8/6/2019 WFC 151 2008-midterm1
http://slidepdf.com/reader/full/wfc-151-2008-midterm1 2/2
Marginal habitats provide fewer resources for a species than do optimal habitats, yet
marginal habitats sometimes are occupied. Give three reasons why marginal habitats
might be occupied, and describe how you would determine whether a habitat wasmarginal or optimal for a given species. (5 pts)
The Era of Environmental Management has persisted for over 40 years, and a new Eramay be imminent. Speculate about the future: outline your predictions about changes in
attitudes and resultant effects on wildlife between now and the year 2025. (2 pts)
