Benjamin/Cummings, 1999 - Science - 620 pages
This coherent text translates the methods of statisticians into "ecological English" so that students may readily apply these methods to the real world. Ecological Methodology, Second Edition provides a balance of material on animal and plant populations. It teaches students of ecology how to design the most efficient tests in order to obtain maximum precision with minimal work. The first part of the text focuses on biological and technical issues in statistical methodology. Students learn about advances that have been made in designing better sampling devices, along with the techniques and equipment used for sampling. The second part deals with creating solid statistical design, and presents all methods that are well-known to statisticians in a language and context that students will easily understand.
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Thus one could use linear regression techniques to obtain an estimate of the
slope (1/N) and thus an estimate of population size. The appropriate formula for
this estimation is X (C, M%) W = H (2.13) 2. (R,M,) where s = Total number of ...
For example, from Table 2.7 the size of the “marked” population at time 6 is 2 (78
+ 1)(4) = —- + - - M6 66 + 1 57 = 61.72 The proportion of “marked” animals is
obtained from _ m, # 1 al n, + 1 (2.41) For example, from Table 2.7 57 -- 1 ^ - = =
Cochran (1977, 98) has shown that with optimal allocation, the theoretical
expectation is that S.E.(optimal) < S.E.(proportional) < S.E.(random) where S.E.(
optimal)= Standard error of the stratified mean obtained with optimal allocation of