NOAA Protocols for Fisheries Acoustics Surveys and Related ...

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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 6
Definition & Importance....................................................................................... 43 Techniques ............................................................................................................ 44 Event Log.......................................................................................................... 44 SCS data............................................................................................................ 44 Error ..................................................................................................................... 44 Considerations ...................................................................................................... 44 Remediation ...................................................................................................... 44 Improvements ................................................................................................... 44 Data Management ..................................................................................................... 44 Modifications to Protocols.......................................................................... 45 References .................................................................................................... 46 7
Page 1: NOAA Protocols for Fisheries Acoust
Page 4 and 5: Echo Sounder Parameters ...........
Page 9: Introduction In response to Vice Ad
Page 12 and 13: Advanced Survey Technologies Progra
Page 14 and 15: Techniques Before conducting a cali
Page 16 and 17: Considerations Remediation Echo sou
Page 18 and 19: transmission loss. To correct for s
Page 20 and 21: unavoidably discarded, just as some
Page 22 and 23: factors such as orientation are not
Page 24 and 25: A schedule for calibration and main
Page 26 and 27: Techniques Noise Acoustical A commo
Page 28 and 29: ⎛ I ⎞ r TS ≡ 10 log10 ⎜ ⎟
Page 30 and 31: Considerations Remediation If a TS-
Page 32 and 33: Techniques Beam Pattern Transducers
Page 34 and 35: during vertical migration, will cau
Page 36 and 37: A schedule for calibration and main
Page 38 and 39: degradation are external to the ech
Page 40 and 41: permanently archived for each surve
Page 42 and 43: Numerical Density to Biomass Densit
Page 44 and 45: An electronic ‘event log’ can b
Page 46 and 47: References Demer, D.A., M.A. Soule,
Page 48 and 49: Regional Protocols Because of the d
Page 51 and 52: Table of Contents Introduction.....
Page 53: Electrical ........................
Page 56 and 57:
Center Background NEFSC The Northea
Page 58 and 59:
S v Calibrations The NEFSC acoustic
Page 60 and 61:
Operation Menu/Transmit Power Norma
Page 62 and 63:
Software The echo sounder firmware
Page 64 and 65:
ii. Minimum Sv for good pick: -50.0
Page 66 and 67:
Net mensuration sensors are attache
Page 68 and 69:
We remove backscattering by surface
Page 70 and 71:
GPS The primary Global Positioning
Page 72 and 73:
Electrical Electrical noise protoco
Page 74 and 75:
Scientific Computer System (SCS) Fi
Page 77:
Appendix 2 March 11, 2005 NOAA Prot
Page 80 and 81:
Techniques ........................
Page 82 and 83:
Center Background AFSC The Alaska F
Page 84 and 85:
On-axis sensitivity and S v calibra
Page 86 and 87:
Volume Backscattering Measurements
Page 88 and 89:
Mid-water juvenile pollock (max sa=
Page 90 and 91:
Biological Sampling Mid-water and n
Page 92 and 93:
Bubble Attenuation Vessel speed is
Page 94 and 95:
Data Collection Since 1990 to the p
Page 96 and 97:
sampling resolution of scattering l
Page 98 and 99:
A decision must be made as to wheth
Page 100 and 101:
design. If fish abundance in this a
Page 102 and 103:
Simrad. 2001. Simrad EK60 scientifi
Page 104 and 105:
104
Page 106 and 107:
Acoustic Data......................
Page 108 and 109:
ackscattering cross-section (σ i )
Page 110 and 111:
o For the 38 kHz transducer operati
Page 112 and 113:
• Two-way integrated beam pattern
Page 114 and 115:
Classification Techniques Single Fr
Page 116 and 117:
Performance Degradation Definition
Page 118 and 119:
Biological Data Data from catch pro
Page 120 and 121:
elation also assumes that backscatt
Page 122 and 123:
finer than the 13.5-18.9 nmi (25-35
Page 124 and 125:
Improvements - The annual hake migr
Page 126 and 127:
Techniques The primary source of th
Page 128 and 129:
Hamano, A., Sasakura, T., Kieser, R
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