NOAA Protocols for Fisheries Acoustics Surveys and Related ...

Trawls ........................................................................................................... 35
Underwater video.......................................................................................... 36
Bottom Tracking ............................................................................................... 36
Error ..................................................................................................................... 36
Considerations ...................................................................................................... 36
Remediation ...................................................................................................... 36
Improvements ................................................................................................... 37
Performance Degradation ......................................................................................... 37
Definition & Importance....................................................................................... 37
Techniques ............................................................................................................ 38
Noise ................................................................................................................. 38
Acoustical ..................................................................................................... 38
Electrical ....................................................................................................... 38
Bubble Attenuation ........................................................................................... 38
Transducer Motion............................................................................................ 38
Bio-fouling........................................................................................................ 39
Error ..................................................................................................................... 39
Considerations ...................................................................................................... 39
Remediation ...................................................................................................... 39
Improvements ................................................................................................... 39
Data Management ..................................................................................................... 39
Sampling....................................................................................................................... 40
Survey Design (A i ).................................................................................................... 40
Definition & Importance....................................................................................... 40
Techniques ............................................................................................................ 40
Vessel Speed ..................................................................................................... 41
GPS ................................................................................................................... 41
Error ..................................................................................................................... 41
Considerations ...................................................................................................... 41
Remediation ...................................................................................................... 41
Improvements ................................................................................................... 41
Numerical Density to Biomass Density (D i )............................................................. 42
Definition & Importance....................................................................................... 42
Techniques ............................................................................................................ 42
Target Strength to Length Regression .............................................................. 42
Length-Weight Regression ............................................................................... 42
Error ..................................................................................................................... 43
Considerations ...................................................................................................... 43
Remediation ...................................................................................................... 43
Improvements ................................................................................................... 43
Oceanographic Data.................................................................................................. 43
Definition & Importance....................................................................................... 43
Techniques ............................................................................................................ 43
CTD profiles ..................................................................................................... 43
Surface temperature and salinity....................................................................... 43
Scientific Computer System (SCS)........................................................................... 43
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