Reports of meetings in 1993 and 1995:
Gespeichert in:
| Körperschaft: | |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Copenhagen
Internat. Council for the Exploration of the Sea
1999
|
| Schriftenreihe: | International Council for the Exploration of the Sea: ICES cooperative research report
230 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | 259 S. graph. Darst. |
Internformat
MARC
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| adam_text | IMAGE 1
ICES COOPERATIVE RESEARCHREPORT
RAPPORT DES RECHERCHES COLLECTIVES
NO. 230
WORKING GROUP ON METHODS OF FISH STOCKASSESSMENT
REPORTS OF MEETINGS IN 1993 AND 1995
EDITED BY
GUNNAR STEFANSSON MARINE RESEARCH INSTITUTE P.O.BOX 1390, SKULAGATA4 121
REYKJAVIK
ICELAND
INTERNATIONAL
COUNCIL FOR THE EXPLORATION OF THE SEA CONSEIL INTERNATIONAL POUR
L EXPLORATION DE LA MER
PALAEGADE 2-4 DK-1261 COPENHAGEN K DENMARK
APRIL 1999
UB/T1B 119 995
IMAGE 2
WORKING GROUP ON METHODS OFFISH STOCK ASSESSMENT - REPORTS OF 1993 AND
1995 MEETINGS
CONTENTS
REPORT OF 1993 MEETING
1 SHORT-LIVED SPECIES
1
1.1 INTRODUCTION 1
1.2 EXAMPLES OF MANAGEMENT PROCEDURES FOR SHORT-LIVED SPECIES 1
1.2.1 MANAGEMENT OF THE SOUTH AFRICAN ANCHOVY RESOURCE 1
1.2.2 MANAGEMENT OF THE FISHERY ON CAPELIN IN THE ICELAND-GREENLAND-JAN
MAYEN AREA 2 1.3 THE ANCHOVY FISHERY IN SUB-AREA VIII 2
1.4 SOME POSSIBLE ALTERNATIVES TO A FULL AGE-STRUCTURED (VPA) ASSESSMENT
3
1.5 CONCLUSIONS 3
2 ASSESSMENT METHODOLOGY 4
2.1 SHRINKAGE 4
2.1.1 THEORETICAL CONCEPTS 4
2.1.2 SHRINKAGE IN VPA TUNING 5
2.1.3 SHRINKAGE AND TIME SERIES ANALYSIS 6
2.2 RECRUITMENT ESTIMATION 6
2.2.1 RETROSPECTIVE ANALYSIS 6
2.2.2 SUMMARY AND CONCLUSIONS 8
2.3 INTEGRATION OF RECRUITMENT ESTIMATION AND VPA
8
2.4 UPDATING VPA WITH RECENT SURVEY DATA
9
2.5 RETROSPECTIVE TESTING OF TUNING METHODS 9
2.6 CONCLUSIONS 11
3 STOCK-RECRUITMENT RELATIONSHIPS AND MBALS
11
3.1 STOCK-RECRUITMENT, GENERAL 11
3.2 STOCK AND RECRUITMENT: BIOLOGICAL REFERENCE POINTS FOR FISHING
MORTALITY 12
3.3 STOCK AND RECRUITMENT ANALYSIS WITHOUT VPA, AND THE STABILITY OF
FMCD AND RELATED REFERENCE POINTS 13
3.4 MBALS (MINIMUM BIOLOGICALLY ACCEPTABLE LEVELS)
13
3.5 CAVEATS 15
3.6 FUTURE WORK 15
3.7 CONCLUSIONS (STOCK AND RECRUITMENT)
15
4 MANAGEMENT ADVICE
15
4.1 RISK ANALYSIS: GENERALITIES AND INDISTINCT TERMINOLOGY
15
4.2 THE SHORT-TERM POSSIBLE OUTCOMES OFMANAGEMENT MEASURES 16
4.2.1 SENSITIVITY ANALYSIS 17
4.2.2 COVARIANCE MATRIX FROM STATISTICAL ANALYSIS OF CATCH-AT-AGE DATA
17
4.2.3 UNCERTAINTY ESTIMATES FROM MONTE CARLO SIMULATION OF THE
ASSESSMENT PROCESS 17
4.2.4 UNCERTAINTY ESTIMATES FROM BOOTSTRAPS
18
4.2.5 EXAMPLES OF PROBABILITY PROFILES FOR NORTH SEA COD
18
4.3 MEDIUM-TERM PROJECTION AND ADVICE
20
4.3.1 METHODS FOR MEDIUM-TERM SIMULATIONS 20
4.3.2 ASSESSMENT WORKING GROUP ADVICE 20
4.3.3 PRESENTATION OF MEDIUM-TERM MANAGEMENT ADVICE
21
4.4 MANAGEMENT PROCEDURES
21
5 REPORT REVIEW
22
5.1 EARLIER REPORTS OF THEWORKING GROUP ON METHODS OF FISH STOCK
ASSESSMENT 22
5.2 REPORT OF THE PLANNINGGROUP FOR THE DEVELOPMENT OF MULTISPECIES,
MULTIFLEET, ASSESSMENT TOOLS 22
5.3 REPORT OF THE WORKSHOP ON THE ANALYSIS OF TRAWL SURVEY DATA
23
6
REFERENCES AND WORKING PAPERS
23
ICES COOP. RES. REP. NO. 230 I
IMAGE 3
6.1 REFERENCES 23
6.2 WORKING PAPERS 25
TABLES 26
FIGURES 42
APPENDIX A: NOTATION 69
APPENDIX B: SUMMARY OF REPORTS OFICES WORKING GROUP ON THEMETHODS OF
FISH STOCK ASSESSMENT (AND ASSOCIATED MEETINGS) 71
DATES, LOCATIONS AND REPORTS OF PREVIOUS MEETINGS OF THE ICES WORKING
GROUP ON METHODS OF FISH STOCK ASSESSMENT (AND ASSOCIATED MEETINGS) 72
II ICES COOP. RES. REP. NO. 230
IMAGE 4
REPORT OF 1995 MEETING
1 ESTIMATING QUANTITIES FROM UN-INFORMATIVE, MISSING OR MISLEADING DATA
73
1.1 ISSUES IN AGGREGATED METHODS 73
1.2 ISSUES IN DISAGGREGATED METHODS 73
1.3 ISSUES OF DIAGNOSING MISLEADING DATA 74
2 IMPOSING ADDITIONAL STRUCTURE DATA SETS 74
2.1 INTRODUCTION 74
2.2 GULF OFMAINE COD 74
2.3 ICELANDIC COD 74
2.4 ICELANDIC HADDOCK 74
2.5 SIMULATED TUNA DATA-NOISE FREE 75
2.6 SIMULATED TUNA DATA-NOISE IN CATCH AT LENGTH 75
2.7 NORTH SEA HADDOCK 75
2.8 SOUTHERN GULF OF ST. LAWRENCE COD (NAFO DIVISION 4T, 4VN (NOVEMBER
TO MAY) 75 2.9 SEBASTES MARINUS (ICELANDIC AREA) 76
2.10 UNIT 1 REDFISH (GULF OF ST. LAWRENCE) SEBASTESFACIATUSAND SEBASTES
MENTELLA 76
2.11 PACIFIC OCEAN PERCH 76
2.12 OCEANIC SEBASTES MENTELLA 76
2.13 EASTERN SCOTIAN SHELF COD (NAFO DIVISIONS 4VSW) 76
3 AGGREGATE METHODS 77
3.1 BACKGROUND 77
3.2 POOLED, STATIC, PRODUCTION METHODS 77
3.3 DYNAMIC SURPLUS PRODUCTION METHODS 77
3.4 AGE-BASED PRODUCTION MODELS 78
3.4.1 BACKGROUND 78
3.4.2 SPREADSHEET IMPLEMENTATION 78
3.4.3 VARIATIONS ON SPREADSHEET IMPLEMENTATION 79
3.5 BAYES-BASED PRODUCTION MODELS 80
3.5.1 BACKGROUND 80
3.5.2 IMPLEMENTATION 80
3.5.3 RESULTS 81
3.5.4 DISCUSSION 82
3.6 MODIFIED DELURY MODEL 82
3.6.1 MODEL DESCRIPTION 82
3.6.1.1 MODEL FOR PARAMETER ESTIMATION 82
3.6.1.2 POPULATION SIZE AND MORTALITY RATES 83
3.6.2 APPLICATION TO GULF OF MAINE COD 84
3.6.3 APPLICATION TO ICELANDIC COD 84
3.6.4 APPLICATION TO ICELANDIC HADDOCK 85
3.6.5 APPLICATION TO SEBASTES MARINUS (ICELANDIC AREA) 85
3.6.6 APPLICATION TO CANADIAN REDFISH 85
3.7 OVERVIEW AND FUTURE DIRECTIONS 85
4 LENGTH-BASED METHODS 86
4.1 INTRODUCTION 86
4.2 LENGTH-TO-AGE CONVERSION METHODS 86
4.2.1 NUMERICAL CONVERSION METHODS 86
4.2.2 TESTS ON ICELANDIC HADDOCK 87
4.2.3 TESTS ON CLEAN TUNA DATA 87
4.2.4 PROVISIONAL CONCLUSIONS 88
4.3 SLICING 88
4.4 SP-KEY 89
4.5 TIME SERIES ANALYSIS OF CATCH-AT-LENGTH DATA 89
4.6 CANADIAN UNIT 1 RED (CRED) LENGTH FREQUENCY ANALYSIS 90
4.6.1 BACKGROUND 90
4.6.2 ANALYTICAL APPROACH 91
4.6.3 SELECTIVITY CURVE 91
4.6.4 STEADY-STATE (SS) LENGTH FREQUENCY ANALYSIS 92
ICES COOP. RES. REP. NO. 230 M
IMAGE 5
4.6.5 RELATIVE F 92
4.6.6 RANDOM RECRUITMENT (RR) ANNUAL LENGTH FREQUENCY ANALYSES 92
4.6.7 CONCLUSIONS 92
4.7 SUMMARY 92
5 METHODS TOLERANT OF ERRORS IN CATCH DATA 93
5.1 INTRODUCTION 93
5.2 SEPERABLE ANALYSIS OF RESEARCH VESSEL DATA (RCCPUE) 93
5.2.1 INTRODUCTION 93
5.2.2 MODELS 93
5.2.2.1 SINGLE SURVEY MODEL 93
5.2.2.2 MULTIPLE SURVEY SEPARABLE MODEL 94
5.2.3 ANALYSIS OF TEST DATA SETS 95
5.2.3.1 NORTH SEA HADDOCK 95
5.2.3.2 GULF OFMAINE COD 95
5.2.3.3 GULF OF ST LAWRENCE COD 95
5.2.3.4 ICELANDIC HADDOCK 95
5.2.3.5 ICELANDIC COD 95
5.2.4 SUMMARY 96
5.3 A MODIFIED STAGE 1 ITCOTCIO MODEL 96
5.3.1 THE MODEL 96
5.3.2 ASSESSMENTS 97
5.3.3 SENSITIVITY 98
5.4 TIME SERIES ANALYSIS 98
5.5 OVERVIEW 98
6 DIAGNOSTIC METHODS 99
6.1 BACKGROUND 99
6.2 STOCK PERFORMANCE DISPLAY 99
6.3 RELATIVE F 99
6.4 CONSTRAINT-ADDED LINEAR MODELS OF CATCH/SURVEY INDICES AT AGE 100
6.5 NONLINEAR INTERACTION MODEL FOR SURVEY INDICES 101
6.6 RIGHT-LEFT TWIN RATIO 101
6.7 Q-WINDOW 102
6.8 OUTLIERS 102
6.9 RELATIVE Q 103
6.10 OVERVIEW 103
7 COMPARISON OF METHODS: A MATTER OF CHOICE 104
7.1 TIME SERIES OF RESULTS 104
7.2 PAIRED COMPARISONS 104
8 SUMMARY 105
9 REFERENCES 105
9.1 WORKING DOCUMENTS 107
TABLES 109
FIGURES 152
IV ICES COOP. RES. REP. NO. 230
|
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| spelling | International Council for the Exploration of the Sea Working Group on Methods of Fish Stock Assessments Verfasser (DE-588)670509-1 aut Reports of meetings in 1993 and 1995 Working Group on Methods of Fish Stock Assessment. Ed. by Gunnar Stefánsson Copenhagen Internat. Council for the Exploration of the Sea 1999 259 S. graph. Darst. txt rdacontent n rdamedia nc rdacarrier International Council for the Exploration of the Sea: ICES cooperative research report 230 Fischbestand (DE-588)4125023-0 gnd rswk-swf Bestandsaufnahme (DE-588)4144922-8 gnd rswk-swf (DE-588)1071861417 Konferenzschrift gnd-content Fischbestand (DE-588)4125023-0 s Bestandsaufnahme (DE-588)4144922-8 s DE-604 Stefánsson, Gunnar Sonstige oth International Council for the Exploration of the Sea: ICES cooperative research report 230 (DE-604)BV000247329 230 GBV Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=008708221&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Reports of meetings in 1993 and 1995 International Council for the Exploration of the Sea: ICES cooperative research report Fischbestand (DE-588)4125023-0 gnd Bestandsaufnahme (DE-588)4144922-8 gnd |
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| title | Reports of meetings in 1993 and 1995 |
| title_auth | Reports of meetings in 1993 and 1995 |
| title_exact_search | Reports of meetings in 1993 and 1995 |
| title_full | Reports of meetings in 1993 and 1995 Working Group on Methods of Fish Stock Assessment. Ed. by Gunnar Stefánsson |
| title_fullStr | Reports of meetings in 1993 and 1995 Working Group on Methods of Fish Stock Assessment. Ed. by Gunnar Stefánsson |
| title_full_unstemmed | Reports of meetings in 1993 and 1995 Working Group on Methods of Fish Stock Assessment. Ed. by Gunnar Stefánsson |
| title_short | Reports of meetings in 1993 and 1995 |
| title_sort | reports of meetings in 1993 and 1995 |
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