Methodology for target strength measurements: with special reference to in situ techniques for fish and mikro-nekton
Saved in:
| Format: | Book |
|---|---|
| Language: | English |
| Published: |
Copenhagen
International Council for the Exploration of the Sea
1999
|
| Series: | International Council for the Exploration of the Sea: ICES cooperative research report
235 |
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Physical Description: | III, 59 S. graph. Darst. |
Staff View
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| 245 | 1 | 0 | |a Methodology for target strength measurements |b with special reference to in situ techniques for fish and mikro-nekton |c ed. by E. Ona |
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Record in the Search Index
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| adam_text | IMAGE 1
ICES COOPERATIVERESEARCHREPORT
RAPPORTDES RECHERCHES COLLECTIVES
NO. 235
METHODOLOGY FOR TARGET STRENGTH MEASUREMENTS (WITH SPECIAL REFERENCE TO
IN SITU TECHNIQUES FOR FISH AND MIKRO-NEKTON)
PREPARED BY THE STUDY GROUP ON TARGET STRENGTH METHODOLOGY
EDITED BY
E. ONA
INTERNATIONAL COUNCIL FOR THE EXPLORATION OF THE SEA
CONSEIL INTERNATIONAL POUR 1 EXPLORATION DE LA MER
PALZEGADE 2-4 DK-1261 COPENHAGEN K DENMARK
AUGUST 1999
UB/TIB HANNOVER 89
IMAGE 2
TABLE OFCONTENTS
SECTION PAGE
ACKNOWLEDGEMENTS III
MAIN CONTRIBUTORS III
1 INTRODUCTION 1
REFERENCES 1
2 NOMENCLATURE AND DEFINITIONS
3
2.1 LIST OF SYMBOLS 3
2.2 TERMINOLOGY AND DEFINITIONS 3
REFERENCES 4
3 THE SINGLE BEAM ANALYSIS L. G. RUDSTAM, T. LINDEMAND G. LABAR 6
3.1 PHYSICS 6
3.2 STATISTICS 6
3.3 A FALLACY CONCERNING ASSIGNMENT OF TARGET STRENGTH VALUES TO FISH
SIZE CLASSES 7
3.4 CALIBRATION 8
3.5 FIELD EXAMPLES 9
3.6 CONCLUDING REMARKS 11
ACKNOWLEDGEMENT 11
REFERENCES 11
4 DUAL-BEAM METHOD J. J. TRAYNOR 14
4.1 PRINCIPLE 14
4.2 REMOVAL OFBEAM EFFECT 14
4.3 EFFECT OF NOISE AND THRESHOLDS INVOLVED 14
4.4 CALIBRATION 16
4.5 DETAILED EXAMPLE 16
REFERENCES 18
5 SPLIT BEAM METHOD
P. REYNISSON 19
5.1 PRINCIPLE
19
5.2 CALIBRATION 19
5.2.1 ON-AXIS SENSITIVITY 21
5.2.2 ACOUSTIC BEAM 22
5.3 DETAILED EXAMPLE 22
REFERENCES 27
6 SINGLE-TARGET RECOGNITION E. ONA AND M.BARANGE 28
6.1 MAXIMUM RESOLUTION DENSITIES 28
6.1.1 THE CONCEPT OF ONE TARGET PER REVERBERATION VOLUME 28
6.1.2 SINGLE-FISH DETECTION 31
6.1.3 TYPICAL SINGLE-ECHO DETECTOR ,.31
6.2 PERFORMANCE OF SINGLE-TARGET DETECTORS AT HIGH TARGET DENSITIES 33
6.2.1 THEORETICAL BIASES WHEN TWO TARGETS CONTRIBUTE TO THE ECHO 33
6.2.2 PERFORMANCE AND BIASES GENERATED BY INCOMPLETE DISCRIMINATION OF
OVERLAPPING ECHOES 34 6.2.3 EMPIRICAL SOLUTIONS TO LIMIT TS
OVERESTIMATES DUE TO MULTIPLE ECHO ACCEPTANCE 36
ICES COOP. RES. REP. NO. 235 L
IMAGE 3
?!
6.3 CONCLUDING REMARKS 40
REFERENCES 43
7 BIOLOGICAL SAMPLING /. EVERSON AND D. MILLER 44
7.1 INTRODUCTION 44
7.2 RECOMMENDED BIOLOGICALMEASUREMENTS 44
7.3 SAMPLING METHODS AND ASSOCIATED ERRORS 44
7.3.1 NET SAMPLING 44
7.3.2 DIRECT OBSERVATIONS 45
7.4 CASE STUDY FOR ATLANTIC HERRING 45
7.4.1 PHYSIOLOGICAL FACTORS 45
7.4.2 FISH BEHAVIOUR 46
7.4.3 ADDITIONAL MEASUREMENTS 46
7.4.4 FISH CAPTURE 46
7.5 CONCLUDING COMMENTS 47
REFERENCES 47
8 SPECIAL TECHNIQUES R. KLOSER AND J. DALEN 49
8.1 DEEP-WATER OBSERVATIONS/TOWED SYSTEMS 49
8.1.1 NEED FOR DEEP-WATER IN SITU TS MEASUREMENTS 49
8.1.2 OBTAINING IN SITU TS MEASUREMENTS 49
8.1.3 HARDWARE CONSIDERATIONS 49
8.1.4 SOME PRESENT SYSTEMS 49
8.1.5 CALIBRATION OF DEEP-WATER SYSTEMS 50
8.1.6 RESULTS FROM DEEP-WATER IN SITU MEASUREMENTS 50
8.2 MEASURING TARGET STRENGTHS FOR ZOOPLANKTON AND MICRONEKTON D. V.
HOLLIDAY 50
8.2.1 BACKGROUND 50
8.2.2 DEPENDENCE OF TARGET STRENGTH ON SIZE 50
8.2.3 DEPENDENCE OF TARGET STRENGTH ON ORGANISM SHAPE 54
8.2.4 DEPENDENCE OF TARGET STRENGTH ON PHYSICAL PROPERTIES OF THE TISSUE
54
8.2.5 TARGET STRENGTH ESTIMATION: MODELLING 54
8.2.6 TARGET STRENGTH ESTIMATION: MEASUREMENT AND MODEL VALIDATION:
COMPARISON OF ACOUSTICAL AND CONVENTIONAL SAMPLES FROM THE OPEN SEA 55
8.2.7 MEASUREMENTS WITH ANIMALS IN CAGES 55
8.2.8 MEASUREMENTS ON INDIVIDUAL ANIMALS IN TANKS 56
8.2.9 ACOUSTICAL METHODOLOGY 57
8.2.10 SUMMARY 58
REFERENCES 59
II ICES
COOP. RES. REP. NO. 235
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| spelling | Methodology for target strength measurements with special reference to in situ techniques for fish and mikro-nekton ed. by E. Ona Copenhagen International Council for the Exploration of the Sea 1999 III, 59 S. graph. Darst. txt rdacontent n rdamedia nc rdacarrier International Council for the Exploration of the Sea: ICES cooperative research report 235 Echo sounding in fishing Fish stock assessment Fish surveys Fishes Detection Zielgenauigkeit (DE-588)4288680-6 gnd rswk-swf Mikronekton (DE-588)4485692-1 gnd rswk-swf Messung (DE-588)4038852-9 gnd rswk-swf Fische (DE-588)4017269-7 gnd rswk-swf (DE-588)4143413-4 Aufsatzsammlung gnd-content Zielgenauigkeit (DE-588)4288680-6 s Messung (DE-588)4038852-9 s DE-604 Fische (DE-588)4017269-7 s Mikronekton (DE-588)4485692-1 s Ona, Egil Sonstige oth International Council for the Exploration of the Sea: ICES cooperative research report 235 (DE-604)BV000247329 235 GBV Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=008902598&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Methodology for target strength measurements with special reference to in situ techniques for fish and mikro-nekton International Council for the Exploration of the Sea: ICES cooperative research report Echo sounding in fishing Fish stock assessment Fish surveys Fishes Detection Zielgenauigkeit (DE-588)4288680-6 gnd Mikronekton (DE-588)4485692-1 gnd Messung (DE-588)4038852-9 gnd Fische (DE-588)4017269-7 gnd |
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| title | Methodology for target strength measurements with special reference to in situ techniques for fish and mikro-nekton |
| title_auth | Methodology for target strength measurements with special reference to in situ techniques for fish and mikro-nekton |
| title_exact_search | Methodology for target strength measurements with special reference to in situ techniques for fish and mikro-nekton |
| title_full | Methodology for target strength measurements with special reference to in situ techniques for fish and mikro-nekton ed. by E. Ona |
| title_fullStr | Methodology for target strength measurements with special reference to in situ techniques for fish and mikro-nekton ed. by E. Ona |
| title_full_unstemmed | Methodology for target strength measurements with special reference to in situ techniques for fish and mikro-nekton ed. by E. Ona |
| title_short | Methodology for target strength measurements |
| title_sort | methodology for target strength measurements with special reference to in situ techniques for fish and mikro nekton |
| title_sub | with special reference to in situ techniques for fish and mikro-nekton |
| topic | Echo sounding in fishing Fish stock assessment Fish surveys Fishes Detection Zielgenauigkeit (DE-588)4288680-6 gnd Mikronekton (DE-588)4485692-1 gnd Messung (DE-588)4038852-9 gnd Fische (DE-588)4017269-7 gnd |
| topic_facet | Echo sounding in fishing Fish stock assessment Fish surveys Fishes Detection Zielgenauigkeit Mikronekton Messung Fische Aufsatzsammlung |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=008902598&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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