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BS EN 15910:2014 Water quality. Guidance on the estimation of fish abundance with mobile hydroacoustic methods, 2014
- Contents Page
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms, definitions, symbols and abbreviated terms [Go to Page]
- 3.1 Terms and definitions
- 3.2 Symbols and abbreviated terms
- 4 Principle and field of application
- Table 1 — Suitability of hydroacoustic sampling techniques for inland water bodies and fish communities
- 5 Equipment [Go to Page]
- 5.1 General
- 5.2 System performance [Go to Page]
- 5.2.1 Minimum requirements
- 5.2.2 Optimum requirements
- 5.3 Calibration [Go to Page]
- 5.3.1 General
- 5.3.2 Types of calibration [Go to Page]
- 5.3.2.1 Full instrument and equipment calibration
- 5.3.2.2 Beam pattern calibration
- 5.3.2.3 Standard Target tests
- Table 2 — Example values for target strengths (TS) of tungsten carbide spheres with different diameters for speed of sound (1 450 m/s) in fresh water ([35])
- 6 Survey design [Go to Page]
- 6.1 General
- 6.2 Design for appropriate resolution and detection
- 6.3 Pre-planning
- 6.4 Timing of surveys
- 6.5 Transducer orientation and position [Go to Page]
- 6.5.1 General
- Table 3 — Comparison of factors influencing data quality for horizontal and vertical surveys [Go to Page]
- 6.5.2 Requirements specific to vertical surveys
- 6.5.3 Requirements specific to horizontal surveys
- 6.6 Requirements for acoustic inter-comparisons
- 7 Survey data acquisition [Go to Page]
- 7.1 Acoustic data
- 7.2 Echosounder settings
- 7.3 Data acquisition from additional equipment
- 8 Post-processing of acoustic data [Go to Page]
- 8.1 General
- 8.2 Pre-analysis [Go to Page]
- 8.2.1 Bottom detection
- 8.2.2 Discrimination [Go to Page]
- 8.2.2.1 General
- 8.2.2.2 Separating noise reverberation and setting TS thresholds
- Figure 1 — Hypothetical example of unsuitable (Thr.3) and more suitable (Thr. 1 and 2) ways of setting the noise threshold for fisheries surveys [Go to Page]
- 8.2.2.3 Separating noise echoes by manual classification
- 8.2.3 Single Echo/Target Detection (SED/ST) scenarios [Go to Page]
- 8.2.3.1 General
- 8.2.3.2 Accurate size distribution when SNR is high (>10 dB)
- 8.2.3.3 Track counting when SNR is medium (<10 dB)
- 8.2.3.4 Track counting when SNR is low
- 8.3 Analysis [Go to Page]
- 8.3.1 Abundance estimate methods
- 8.3.2 Vertical surveys [Go to Page]
- 8.3.2.1 Method 1 - Echo integration
- 8.3.2.2 Method 2 - Track-counting
- 8.3.2.3 Method 3 - Echo-counting
- 8.3.3 Horizontal Surveys
- 8.3.4 Biomass estimates [Go to Page]
- 8.3.4.1 General
- 8.3.4.2 Vertical surveys
- 8.3.4.3 Horizontal surveys
- 9 Calculation of Results [Go to Page]
- 9.1 Aim
- 9.2 Identification of targets
- 9.3 Interpretation of Target Strength data
- 9.4 Determination of weight and biomass
- 9.5 Outputs of acoustic data [Go to Page]
- 9.5.1 Fish abundance as numerical density
- 9.5.2 Size structure
- 9.5.3 Biomass
- 9.6 Estimates of sampling variance and precision [Go to Page]
- 9.6.1 Precision of estimates
- 9.6.2 Simple Random Analysis
- 9.6.3 Stratified Analysis
- 10 Quality control and quality assurance [Go to Page]
- 10.1 General
- 10.2 Quality control
- 10.3 Quality assurance
- 11 Survey report [Go to Page]
- 11.1 General
- 11.2 Objectives, sampling location and staff
- 11.3 Equipment and prerequisites
- 11.4 Track details, site details and conditions
- 11.5 Survey results
- Annex A (informative) Supplementary data
- Table A.1 — Supplementary data used in the assessment of fish sampling data
- Annex B (informative) Methods for estimates of fish abundance
- Table B.1 — Summary of methods for estimates of fish abundance
- Annex C (informative) Interpretation of TS into fish length and weight
- Table C.1 — Regression relationships between target strength (TS) in dB and total length (TL) in millimetres or centimetres for dorsal aspect of fish, according to Formulae (C.1) or (C.2)
- Table C.2 — Regression relationships between target strength (TS) in dB and total length (TL) in millimetres or centimetres for any body aspect in horizontal plane; α is angle of fish body in a beam in degrees
- Table C.3 — Regression relationships between target strength (TS)in dB and total length (TL) in millimetres or centimetres for two discrete aspects of the horizontal plane: side aspect, according to Formula TS = A*log (TL)+B, or tail aspect, according...
- Table C.4 — Regression relationships between target strength (TS) in dB and weight (W) in g or kg for two discrete aspects of the horizontal or vertical plane: side or dorsal aspect, according to Formula TS = A*log (W)+B, or tail aspect, according to ...
- Annex D (informative) Deconvolution procedure
- Table D.1 — An example of the deconvolution procedure applied to the all-aspects TS frequency distribution for the trout population in Loch of Boardhouse ([23])
- Annex E (informative) Determination of the Elementary Distance Sampling Unit (EDSU)
- Annex F (informative) Estimates of sampling variance and precision
- Annex G (informative) Published inter-comparison studies
- Figure G.1 — Regressions relating the results of the two teams for fish density values (a) and for biomass values (b) for each of the 12 transects at Stechlinsee
- Figure G.2 — Regressions relating the results of the two teams for fish density values (a) and for biomass values (b) for each of the 9 transects at Irrsee
- Bibliography
- 64_e_stf.pdf [Go to Page]
- Contents Page
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms, definitions, symbols and abbreviated terms [Go to Page]
- 3.1 Terms and definitions
- 3.2 Symbols and abbreviated terms
- 4 Principle and field of application
- Table 1 — Suitability of hydroacoustic sampling techniques for inland water bodies and fish communities
- 5 Equipment [Go to Page]
- 5.1 General
- 5.2 System performance [Go to Page]
- 5.2.1 Minimum requirements
- 5.2.2 Optimum requirements
- 5.3 Calibration [Go to Page]
- 5.3.1 General
- 5.3.2 Types of calibration [Go to Page]
- 5.3.2.1 Full instrument and equipment calibration
- 5.3.2.2 Beam pattern calibration
- 5.3.2.3 Standard Target tests
- Table 2 — Example values for target strengths (TS) of tungsten carbide spheres with different diameters for speed of sound (1 450 m/s) in fresh water [35]
- 6 Survey design [Go to Page]
- 6.1 General
- 6.2 Design for appropriate resolution and detection
- 6.3 Pre-planning
- 6.4 Timing of surveys
- 6.5 Transducer orientation and position [Go to Page]
- 6.5.1 General
- Table 3 — Comparison of factors influencing data quality for horizontal and vertical surveys [Go to Page]
- 6.5.2 Requirements specific to vertical surveys
- 6.5.3 Requirements specific to horizontal surveys
- 6.6 Requirements for acoustic inter-comparisons
- 7 Survey data acquisition [Go to Page]
- 7.1 Acoustic data
- 7.2 Echosounder settings
- 7.3 Data acquisition from additional equipment
- 8 Post-processing of acoustic data [Go to Page]
- 8.1 General
- 8.2 Pre-analysis [Go to Page]
- 8.2.1 Bottom detection
- 8.2.2 Discrimination [Go to Page]
- 8.2.2.1 General
- 8.2.2.2 Separating noise reverberation and setting TS thresholds
- Figure 1 — Hypothetical example of unsuitable (Thr.3) and more suitable (Thr. 1 and 2) ways of setting the noise threshold for fisheries surveys [Go to Page]
- 8.2.2.3 Separating noise echoes by manual classification
- 8.2.3 Single Echo/Target Detection (SED/ST) scenarios [Go to Page]
- 8.2.3.1 General
- 8.2.3.2 Accurate size distribution when SNR is high (>10 dB)
- 8.2.3.3 Track counting when SNR is medium (<10 dB)
- 8.2.3.4 Track counting when SNR is low
- 8.3 Analysis [Go to Page]
- 8.3.1 Abundance estimate methods
- 8.3.2 Vertical surveys [Go to Page]
- 8.3.2.1 Method 1 - Echo integration
- 8.3.2.2 Method 2 - Track-counting
- 8.3.2.3 Method 3 - Echo-counting
- 8.3.3 Horizontal Surveys
- 8.3.4 Biomass estimates [Go to Page]
- 8.3.4.1 General
- 8.3.4.2 Vertical surveys
- 8.3.4.3 Horizontal surveys
- 9 Calculation of Results [Go to Page]
- 9.1 Aim
- 9.2 Identification of targets
- 9.3 Interpretation of Target Strength data
- 9.4 Determination of weight and biomass
- 9.5 Outputs of acoustic data [Go to Page]
- 9.5.1 Fish abundance as numerical density
- 9.5.2 Size structure
- 9.5.3 Biomass
- 9.6 Estimates of sampling variance and precision [Go to Page]
- 9.6.1 Precision of estimates
- 9.6.2 Simple Random Analysis
- 9.6.3 Stratified Analysis
- 10 Quality control and quality assurance [Go to Page]
- 10.1 General
- 10.2 Quality control
- 10.3 Quality assurance
- 11 Survey report [Go to Page]
- 11.1 General
- 11.2 Objectives, sampling location and staff
- 11.3 Equipment and prerequisites
- 11.4 Track details, site details and conditions
- 11.5 Survey results
- Annex A (informative) Supplementary data
- Annex B (informative) Methods for estimates of fish abundance
- Table B.1 — Summary of methods for estimates of fish abundance
- Annex C (informative) Interpretation of TS into fish length and weight
- Table C.1 — Regression relationships between target strength (TS) in dB and total length (TL) in millimetres or centimetres for dorsal aspect of fish, according to Formulae (C.1) or (C.2)
- Table C.2 — Regression relationships between target strength (TS) in dB and total length (TL) in millimetres or centimetres for any body aspect in horizontal plane; α is angle of fish body in a beam in degrees
- Table C.3 — Regression relationships between target strength (TS) in dB and total length (TL) in millimetres or centimetres for two discrete aspects of the horizontal plane: side aspect, according to Formula , or tail aspect, according to Formula
- Table C.4 — Regression relationships between target strength (TS) in dB and weight (W) in g or kg for two discrete aspects of the horizontal or vertical plane: side or dorsal aspect, according to Formula TS = A*log (W)+B, or tail aspect, according to ...
- Annex D (informative) Deconvolution procedure
- Table D.1 — An example of the deconvolution procedure applied to the all-aspects TS frequency distribution for the trout population in Loch of Boardhouse ([23])
- Annex E (informative) Determination of the Elementary Distance Sampling Unit (EDSU)
- Annex F (informative) Estimates of sampling variance and precision
- Annex G (informative) Published inter-comparison studies
- Figure G.1 — Regressions relating the results of the two teams for fish density values (a) and for biomass values (b) for each of the 12 transects at Stechlinsee
- Figure G.2 — Regressions relating the results of the two teams for fish density values (a) and for biomass values (b) for each of the 9 transects at Irrsee
- Bibliography [Go to Page]
