Abstract
Most of these relative methods require only comparatively simple equipment and, as they often serve to concentrate the animals, they provide impressive collections of data from situations where few animals will be found by absolute methods. From entirely statistical considerations the plentiful data from relative methods is preferable to the hard-won, often scanty, information from unit area sampling. Most traps will collect specimens continuously, providing a relatively large return for the amount of time spent working with them; i.e. the cost (see p. 20) of the data is low. With all these apparent advantages it is hardly surprising that these methods have been extensively used and developed; there are probably more accounts of their design and use in the literature than references to all the other topics in this book (therefore the list at the end of this chapter is highly selective).
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Southwood, T.R.E. (1978). Relative Methods of Population Measurement and the Derivation of Absolute Estimates. In: Ecological Methods. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5809-8_7
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