Choosing sample sizes for various blood parameters of broiler chickens with normal and non-normal observations

Poultry Science
R V NunesG M Pesti

Abstract

Experimental power is a measure of the ability of an experiment to detect differences between treatment means. Researchers design experiments and then calculate the probability that differences are simply due to chance, the null hypothesis. The objective of the analyses reported here was to determine the appropriate number of samples to demonstrate significant differences of various magnitudes from broiler chicken blood constituents. Over 800 samples were taken for a study of the effects of sample storage time, serum vs. plasma, light intensity, and fed vs. fasted birds on blood cholesterol, triglycerides, uric acid, glucose, total protein (TP), albumin, globulin, alanine aminotransferase (ALT), aspartate aminotransferase, gammaGT, creatinine, alkaline phosphatase, Ca and P. Various transformations increased the QQ plot R2 values from 0.000 to 0.149 or 0.00 to 17.62%. Most of the QQ plot R2 values were at or above 0.90. The 1/x2 transformation of blood P data showed the biggest increase in QQ plot R2 (0.846 to 0.995). The different standard deviations and coefficients of variation (CVs) found for each variable resulted in widely different numbers of replicates needed to detect differences in 2 treatment means. The extremes were...Continue Reading

References

Dec 13, 2012·Journal of Animal Science and Biotechnology·Yongwei WangDan Liu
Aug 21, 2013·Poultry Science·Clarice G B DemétrioChris Brien
Jun 3, 2016·Anais Da Academia Brasileira De Ciências·Mohammadreza PourakbariAndrés Martínez
Apr 1, 2016·Journal of Food and Drug Analysis·Abdelrazzag ElmajdoubAbubakr El-Mahmoudy
Apr 6, 2018·Avian Diseases·K W BafundoG M Pesti

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Citations

Aug 18, 2021·Journal of Animal Physiology and Animal Nutrition·Sara Bellezza OddonAchille Schiavone

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