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Determining Variability, Confidence, and Statistical Power in Aquaculture Experiments

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Title: Determining Variability, Confidence, and Statistical Power in Aquaculture Experiments
Authors: Araujo, Pedro
Keywords: sources of variation, error decomposition, experimental design, confidence of the design, statistical power
LC Subject Headings: Fish culture--Israel--Periodicals.
Fish culture--Periodicals.
Issue Date: 2008
Publisher: Israeli Journal of Aquaculture - BAMIGDEH
Citation: Araujo, P. (2008). Determining Variability, Confidence, and Statistical Power in Aquaculture Experiments. The Israeli Journal of Aquaculture - Bamidgeh, 60(2), 134-153.
Series/Report no.: The Israeli Journal of Aquaculture - Bamidgeh
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.
Pages/Duration: 20 pages
ISSN: 0792-156X
Appears in Collections:IJA Volume 60, Issue 2, 2008

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