Abstract
The aim of this study was to evaluate a commercial sensor—a three-axis accelerometer—to predict animal behavior with a variety of conditions in tropical grazing systems. The sensor was positioned on the underjaw of young bulls to detect the animals’ movements. A total of 22 animals were monitored in a grazing system, during both seasons (wet and dry), with different quality and quantity forage allowance. The machine learning (ML) methods used were random forest (RF), convolutional neural net and linear discriminant analysis; the metrics used to determine the best method were accuracy, Kappa coefficient, and a confusion matrix. After predicting animal behavior using the best ML method, a forecast for animal performance was developed using a mechanistic model: multiple linear regression to correlate intermediate average daily gain (iADG) observed versus iADG predicted. The best ML method yielded accuracy of 0.821 and Kappa coefficient of 0.704, was RF. From the forecast for animal performance, the Pearson correlation was 0.795 and the mean square error was 0.062. Hence, the commercial Ovi-bovi sensor, which is a three-axis accelerometer, can act as a powerful tool for predicting animal behavior in beef cattle production developed under a variety tropical grazing condition.
Highlights
10 s of accelerometer transmission to classify sheep ingestive behavior
Even though previous studies have yielded interesting results, these were based studying only one breed or specific conditions, and some of them concluded that further studies using sensors in grazing systems under different conditions are necessary9.the aim of the present study was to evaluate a commercial sensor—a three-axis accelerometer— to predict animal behavior with a variety of conditions in tropical grazing systems, using different animal genetic groups monitored during both the wet and the dry season, at different beef cattle phases
The types of animal behavior accounted for different percentages of the total observation record (TOR) from the visual observation in loco + video record
Summary
10 s of accelerometer transmission to classify sheep ingestive behavior. The authors found accuracy close to 0.79 considering 5 s interval and suggested as the best to predict the main five behaviors studied. Even though previous studies have yielded interesting results, these were based studying only one breed or specific conditions, and some of them concluded that further studies using sensors in grazing systems under different conditions are necessary[9].the aim of the present study was to evaluate a commercial sensor—a three-axis accelerometer— to predict animal behavior with a variety of conditions in tropical grazing systems, using different animal genetic groups monitored during both the wet and the dry season, at different beef cattle phases (rearing or finishing)
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