Publications by authors named "G M Pesti"
A Microsoft Excel workbook, User-Friendly Feed Formulation with Data from Australia (UffdAu.xlsm), has been developed for teaching feed formulation techniques to tertiary level, university students. It runs under both Microsoft Windows and Apple iOS operating systems.
View Article and Find Full Text PDFA retrospective analysis encompassing 18 yr (1999-2016) of broiler chicken health surveys from broiler production complexes throughout the United States was conducted to identify trends and areas of opportunity. The analysis used necropsy data from 19,577 broiler chickens considered to be "healthy" or "clinically normal" by visual assessment. The very low incidence of dehydrated (0.
View Article and Find Full Text PDFCurrent methods for feed formulation are based on minimizing costs, not maximizing profits. Complex models of bird growth and reproduction as functions of genetic, feed and other environmental variables are being developed, but their adaptation has been slow. The development of profit maximizing models will evolve to center on the production functions of broilers and layers.
View Article and Find Full Text PDFArticle Synopsis
- A 1932 editorial highlighted the importance of sampling theory for determining the number of birds needed in experimental setups, but this approach has been underutilized in poultry research for the past 90 years.
- A nested analysis of two datasets from Australia and North America separated variances at the bird and pen levels, revealing diminishing returns in standard deviation (SD) reductions when increasing the number of birds per pen or pens per treatment.
- Ultimately, this analysis emphasizes the need for careful consideration of historical data and the balance between adequate replication and ethical resource use in research involving animals, particularly in detecting small differences like those in broiler chicken body weight.
It has been demonstrated that the fiber content of oilseed meals and total amino acids (AA) in distillers' grains products affects standardized ileal digestibility (SID) values from swine assays and that total protein concentration affects the AA digestibility in assays using chickens. This analysis was conducted to test the hypothesis that the total AA content of test samples affects the SID assay results. Databases containing total AA profiles and SID values of 20 feedstuffs commonly fed to pigs from 2 sources, AMINODat 5.
View Article and Find Full Text PDF