Detection of difficult conceptions in dairy cows using selected data mining methods
Journal Title: Animal Science Papers and Reports - Year 2011, Vol 29, Issue 4
Abstract
In the present study, the detection of difficult conceptions in dairy cows using selected data mining methods – na ve Bayes classifier (NBC) and regression and classifications trees (CART) is presented. The set of 11 diagnostic variables was used, which included, among others, number of lactation, artificial insemination (AI) season, age of inseminated cow, proportion of HF-genes in cow genotype, sex of calf from preceding calving, length of pregnancy, milk, protein and fat yield. Two conception classes were distinguished: the GOOD class, if a cow conceived after one or two AIs and the “POOR” class, if more than two AIs per conception were required. The models were characterized by capability of predicting the membership of conceptions to either class. Correctness of predictions was 83%. CART proved to be more precise in detecting conceptions of the POOR class (sensitivity) compared with predictions by NBC (P≤0.01). Specificity was similar for both classifiers (90% and 93%). Among the variables determining conception class, calving-to-conception interval, calving interval and the difference between the mean body condition and condition at AI were the most significant variables for CART. Utilization of these classifiers, particularly of CART, may help a breeder to appropriately prepare cows for AI, thus contributing to the improved financial results of a herd.
Authors and Affiliations
Wilhelm Grzesiak, Daniel Zaborski, Piotr Sablik, Renata Pilarczyk
Keywords
Related Articles
- EP ID EP71328
- DOI -
- Views 140
- Downloads 0
Evaluation of expression of endothelin A receptor gene in the follicular granulosa cells of broiler hens as related to variation of plasma leptin
This study was designed to investigate levels of ETAR gene expression in the granulosa layer of broiler hens with different levels of plasma leptin and lipids (cholesterol and triacyglycerol). To induce different plasma...
Haematological indices, size of erythrocytes and haemoglobin saturation in broiler chickens kept in commercial conditions
The study aimed at analysing and comparing haematological indices, blood saturation and dimensions of red blood cells of Ross 308 broiler chickens of both sexes. On day 44 of rearing, blood was withdrawn once from 60 ran...
Operant conditioning of dogs (Canis familiaris) for identification of humans using scent lineup
Training of dogs to distinguish individual human scent has no well-established scientific basis. The aim of the study was to evaluate the progress made over three consecutive training phases and to compare the training...
The effect of CAST and RYR1 polymorphisms on carcass and meat quality traits in Pietrain crossbred pigs
The aim of this study was to determine the effect of the calpastatin (CAST) and ryanodine receptor (RYR1) genes polymorphism on carcass and meat quality traits in Pietrain crossbred pigs. No significant differences in th...
Detection of quantitative trait loci affecting carcass traits and internal organs on chromosome 3 in an F2 intercross of Japanese quail
Molecular technologies based on markers indicating differences among individuals at the DNA level can play an important role in genetic improvement of carcass traits through marker or gene assisted selection. The purpose...