I would like some references for the following type design.
Consider an area, much of which will not be treated. However, small
sections will be treated, and if the treatment works, the density of an
organism will be lessened. The basic question is "What is the likelihood
that the low-density areas would have happened by chance, in the absence of
the treatment?" If this likelihood is very small, then we could suggest the
treatment is the reason we have lower densities in these areas. Note, there
could be a gradient with edge effects.
How would one go about making a decision rule for testing whether the
treatment was effective?
My guess is that the non-treated areas will be quite patchy. Our hope is
that in the treated areas, if the organism isn't completely eliminated, the
density will be considerably less.
Thanks,
Also, any suggestions for sample sizes and sample distributions (regular,
clustered in treatment and non-treatment areas) would be appreciated.
Warren Schlechte
HOH Fisheries Science Center
HC 7 Box 62
Ingram, TX 78025
Phone 830.866.3356
Fax 830.866.3549
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