Habitat determinants and predatory interactions of the endemic freshwater crayfish (koura, Paranephrops planifrons) in the lower North Island, New Zealand : a thesis presented in partial fulfillment of the requirements for the degree of Masters of Science in Ecology at Massey University, Palmerston North, New Zealand
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Date
2009
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Massey University
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Abstract
A study in the Lower North Island located Parenephrops planifrons (koura) at 73 sites
out of 104 sites visited (appendix 1). There was a significant difference in habitat
variables between the sites which had koura present and those where they were
absent. Examples of sites are shown in Appendix 3. Habitat variables important for
classifying koura habitat included riparian cover, predators, winter equilibrium
temperature and presence of in-stream habitat in the form of vegetation, litter cover
and the stream sequence composition. Regression trees built could accurately
describe the data but the kappa statistic was low.
Description
Keywords
Habitat variables, Regression trees