This book reviews and evaluates the scientific basis of U.S. management of fisheries for Atlantic bluefin tuna. In particular, it focuses on the issues of stock structure and stock assessments used by the National Oceanic and Atmospheric Administration's National Marine Fisheries Service for management under the International Convention for the conservation of Atlantic Tunas.
- An Assessment of Atlantic Bluefin Tuna
- Copyright
- Preface
- Acknowledgments
- Contents
- Summary
- GENERAL RECOMMENDATIONS
- RESEARCH RECOMMENDATIONS
- 1 Background
- ICCAT REGULATIONS FOR ATLANTIC BLUEFIN TUNA
- ISSUES IN ATLANTIC BLUEFIN TUNA MANAGEMENT
- PURPOSE OF THIS STUDY
- 2 Historical Evidence for Stock Structure
- INTRODUCTION
- CONCEPT OF STOCKS
- HISTORY OF ATLANTIC BLUEFIN TUNA STOCK DESIGNATIONS
- GENETIC STUDIES
- Genetic Variation in Tunas and Scombroid2 Fish
- Genetic Variation in Bluefin Tuna
- Conclusion
- Recommendation
- LIFE HISTORY PARAMETERS
- Geographic Locality of Spawning Grounds
- Timing of Spawning
- Age at Sexual Maturity
- Larval Biology
- Physiological Ecology of Bluefin Tuna Movement Patterns
- Giant Bluefin Tuna in Winter
- Movements of Age 0 Fish, Small Fish, and Medium Fish6
- Giant Bluefin Tuna in New England
- Conclusions
- Recommendations
- CLIMATE
- Climate and Evolutionary History
- Conclusion
- Fish Abundance and Climatic Changes
- Conclusion
- Recommendation
- MOVEMENT BASED ON NONGENETIC MARKERS
- Parasite Markers
- Microconstituent Analysis
- Conclusions
- Recommendation
- 3 Transatlantic Movement of Atlantic Bluefin Tuna
- INTRODUCTION
- TAG-RECAPTURE DATA
- West to East
- East to West
- Reanalysis of Tagging Data
- METHODS
- DISCUSSION
- 4 Fish Stock Assessment
- GROWTH
- STANDARDIZATION OF WESTERN ATLANTIC BLUEFIN TUNA CATCH RATES (CPUES)
- Introduction
- Model Development
- Analyses
- Rod and Reel Indices for Small Fish
- Rod and Reel Indices for Giant Bluefin Tuna
- Captains' Logbook Data for Giant Bluefin Tuna
- Comparison of Captains' Logbook Data and Rod and Reel Survey for Giant Bluefin Tuna
- Trend Analysis
- Recommendations
- POPULATION ASSESSMENT
- SCRS Base Case
- The Role of Indices
- Is the SCRS Base Case Reasonable?
- Are Uncertainties Adequately Incorporated into the SCRS Assessment?
- The Two-Area Mixed-Stock Case
- DISCUSSION
- Conclusions—Standardization
- Recommendations—Standardization
- Conclusions—Population Assessment
- Recommendations—Population Assessment
- 5 Conclusions and Recommendations
- GENERAL RECOMMENDATIONS
- RESEARCH RECOMMENDATIONS
- References
- Appendixes
- APPENDIX A Biographical Sketches of Committee Members
- APPENDIX B Bibliography
- APPENDIX C Genetic Variation in Other Tunas and Related Fish
- YELLOWFIN TUNA
- ALBACORE TUNA
- SKIPJACK TUNA
- BILLFISHES
- REFERENCES
- APPENDIX D Archival Tag Technology
- APPENDIX E Evidence for Mixing Based on Parasites
- NASICOLA SP.
- ELYTHROPHORA SP.
- HOSTS WITH BOTH PARASITES
- SUMMARY
- REFERENCES
- APPENDIX F Microconstituent Analysis
- REFERENCES
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