NOAA Protocols for Fisheries Acoustics Surveys and Related ...

Bottom Tracking ............................................................................................... 67
Performance Degradation ......................................................................................... 67
Techniques ............................................................................................................ 67
Noise ................................................................................................................. 67
Acoustical ..................................................................................................... 67
Electrical ....................................................................................................... 67
Bubble Attenuation ........................................................................................... 67
Transducer Motion............................................................................................ 68
Bio-fouling........................................................................................................ 68
Considerations ...................................................................................................... 68
Remediation ...................................................................................................... 68
Data Management ..................................................................................................... 68
Target Strength ( i )..................................................................................................... 68
Models....................................................................................................................... 68
Techniques ............................................................................................................ 68
Theoretical ........................................................................................................ 68
Empirical........................................................................................................... 68
Validation.......................................................................................................... 69
Data Collection ......................................................................................................... 69
Techniques ............................................................................................................ 69
Echo sounder Parameters.................................................................................. 69
Software ............................................................................................................ 69
In situ data......................................................................................................... 69
GPS ................................................................................................................... 70
Oceanographic Data.......................................................................................... 70
Detection Probability ................................................................................................ 70
Techniques ............................................................................................................ 70
Thresholding ..................................................................................................... 70
Acoustic Dead Zones: Near Bottom and Near Surface .................................... 70
Animal Behavior............................................................................................... 70
Vessel Noise...................................................................................................... 70
Density Requirements....................................................................................... 71
Single Frequency .............................................................................................. 71
Multiple Frequency........................................................................................... 71
Classification............................................................................................................. 71
Techniques ............................................................................................................ 71
Single Frequency .............................................................................................. 71
Multiple Frequency........................................................................................... 71
Biological Sampling.......................................................................................... 71
Trawls ........................................................................................................... 71
Underwater video.......................................................................................... 71
Bottom Tracking ............................................................................................... 71
Performance Degradation ......................................................................................... 71
Techniques ............................................................................................................ 71
Noise ................................................................................................................. 71
Acoustical ..................................................................................................... 71
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