Determining Variability, Confidence, and Statistical Power in Aquaculture Experiments
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2008
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Israeli Journal of Aquaculture - BAMIGDEH
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Abstract
This article deals with the lack of appreciation among marine biologists of basic statistics in aqua- culture experiments. Topics include calculation of sources of variation, the importance of true replication rather than pseudo-replication to test for treatment effects, estimation and visualization of the confidence of an experimental design used in feeding trials, and calculation of its statisti- cal power. An arbitrary example is used to illustrate how the described theory can be applied in practice. The approach demonstrates that nutritional experiments with a reduced number of tanks can be a valid strategy as long as certain experimental considerations are taken into account. In addition, it shows that information on the relative sizes of ‘between’ and ‘within’ sources of vari- ation can be used to design more efficient experiments by minimizing the effects of the stronger sources of variance. The approaches used in this article are applicable to large and small-scale experiments.
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Keywords
sources of variation, error decomposition, experimental design, confidence of the design, statistical power, Fish culture--Israel--Periodicals., Fish culture--Periodicals., Aquaculture--Israel--Periodicals., Aquaculture--Periodicals.
Citation
Araujo, P. (2008). Determining Variability, Confidence, and Statistical Power in Aquaculture Experiments. The Israeli Journal of Aquaculture - Bamidgeh, 60(2), 134-153.
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20 pages
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