IGER Behaviour Analysis System

This  was developed at the Institute of Grassland and Environmental Research, North Wyke, Devon, UK, and later refined by Ultra Sound Advice. Although originally designed to record the foraging behaviour of sheep and cattle, the system provides a reliable means to automatically record the behaviour of any animal above a minimum size.

PLEASE NOTE THAT THIS INSTRUMENT IS NO LONGER MANUFACTURED, BUT REPAIR FACILITIES ARE STILL AVAILABLE.

The data logger records the amplitude of the animal's jaw movements onto an MS-DOS formatted CompactFlash card. The jaw movement amplitude data is recorded as 8 bit integers at 20 Hz, plus with legswitch movements at 0.5 Hz. The  data file on the CF card is subsequently read by a PC card reader into a PC, where it is processed using the GRAZE jaw movement analysis software.

Here is a typical raw signal output.GRAZEsample2

 

 

 

 

 

After setting analysis parameters, the program categorizes the outputs into colour-coded bouts as shown here.

GRAZE

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