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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I will briefly describe two types of approaches to population estimation that can
be used with exploited populations. ... I will use here the general terminology of
Paulik and Robson (1969), calling the two types of organisms x-types and y-types
Ap = pi – p2 = Expected change in the proportion of x-types during the
experiment. 2. u = Rate of exploitation = R/NI, which is the fraction of the whole
population that is removed. 3. f = R./R = fraction of x-types in the removals. 4.
e = 0.10 ; 2 e = 0.25 e = 0.50 e = 1.00 10' O 0.10 0.20 0.30 0.40 Ap = p, —p, =
change in proportion of x types between to and t, for p = 0.5 Figure 3.2 Sample
sizes required for a change-in-ratio estimate of population size at several