PC-based echo integration system for fish behaviour studies
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An echo integration system presenting the distribution and vertical and horizontal movements of fish in net pens, is described. The system can be configured to multiplex up to 16 transducers sequentially. The number of integration layers and pings integrated are optional. Results are presented in real-time on a color monitor and saved on disk for later analysis. Based on standard personal computer technology, the method is inexpensive compared to other methods.