Registrierung des Auslaufverhaltens einzelner Legehennen mit einem RFID-System

Abstract

In a laboratory test of a low-frequency RFID system the probability of registration was assessed and this system was used to study ranging behavior of laying hens. To test the equipment, tags with various orientations on a platform were moved with varying speeds across a different number of antennas. The probability of registration declined when the speed of tags was greater than 1.5 m/s. In the field test on 12 farms antennas were placed on both sides of every pophole and tags were attached to a sample of laying hens. The probability of registration of a hen was 94 %. It is suggested to decrease the ID of the tag from 64 bit to 32 bit in order to read tags up to a speed of 3.2 m/s, reliably. In order to find a possible influence of the magnetic fields that were generated by reading the tags on ranging behavior, the use of two popholes was evaluated while the system at the popholes was alternatively switched off. The use of the two popholes was not affected by that so with the proposed modification of the tag this system seems suitable to study ranging behavior in laying hens