NOAA Protocols for Fisheries Acoustics Surveys and Related ...

Table of Contents
Introduction................................................................................................. 55
Center Background..................................................................................... 56
NEFSC ......................................................................................................................... 56
Methods........................................................................................................ 57
Calibration and System Performance ......................................................................... 57
Calibration................................................................................................................. 57
Techniques ............................................................................................................ 57
Software ............................................................................................................ 57
Standard values ................................................................................................. 57
On-axis sensitivity ............................................................................................ 57
Beam pattern measurements ............................................................................. 57
S v Calibrations .................................................................................................. 58
Oceanographic Data.......................................................................................... 58
Considerations ...................................................................................................... 58
Remediation ...................................................................................................... 58
System Performance ................................................................................................. 58
Techniques ............................................................................................................ 58
Considerations ...................................................................................................... 58
Remediation ...................................................................................................... 58
Data Management ..................................................................................................... 58
Volume Backscattering Measurements (E i )................................................................ 59
Data Collection ......................................................................................................... 59
Techniques ............................................................................................................ 59
Echo Sounder Parameters ................................................................................. 59
Software ............................................................................................................ 62
GPS ................................................................................................................... 62
Oceanographic Data.......................................................................................... 62
Detection Probability ................................................................................................ 62
Techniques ............................................................................................................ 62
Thresholding ..................................................................................................... 62
Range ................................................................................................................ 63
Acoustic Dead Zones: Near surface and near bottom....................................... 63
Animal Behavior............................................................................................... 64
Vessel Noise and Avoidance ............................................................................ 64
Multiple scattering and shadowing ................................................................... 64
Classification............................................................................................................. 64
Techniques ............................................................................................................ 64
Single Frequency .............................................................................................. 64
Multiple Frequency........................................................................................... 64
Biological Sampling.......................................................................................... 65
Trawls ........................................................................................................... 65
Underwater video.......................................................................................... 67
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