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  • 1
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Fish stock assessment. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (735 pages)
    Edition: 1st ed.
    ISBN: 9780080470436
    DDC: 333.95611
    Language: English
    Note: Front Cover -- Stock Identification Methods: Applications in Fishery Science -- Copyright Page -- ANNOTATED TABLE OF CONTENTS -- Foreword -- Contributors -- Part I: Introduction -- Chapter 1. Stock Identification Methods: An Overview -- Chapter 2. Definition of Stocks: An Evolving Concept -- Chapter 3. Fish Migration and the Unit Stock: Three Formative Debates -- Chapter 4. Environmental and Genetic Influences on Stock Identification Characters -- Part II: Life History Traits -- Chapter 5. The Use of Early Life Stages in Stock Identification Studies -- Chapter 6. Life History Parameters -- Part III: Natural Marks-Morphological Analyses -- Chapter 7. Morphometric Landmarks -- Chapter 8. Morphometric Outlines -- Chapter 9. Analyses of Calcified Structures: Texture and Spacing Patterns -- Chapter 10. Meristics -- Part IV: Natural Marks-Environmental Signals -- Chapter 11. Parasites as Biological Tags -- Chapter 12. Otolith Elemental Composition as a Natural Marker of Fish Stocks -- Chapter 13. Fatty Acid Profiles as Natural Marks for Stock Identification -- Part V: Natural Marks-Genetic Analyses -- Chapter 14. Chromosome Morphology -- Chapter 15. Genetic Analysis: Allozymes -- Chapter 16. Mitochondrial DNA -- Chapter 17. Use of Nuclear DNA in Stock Identification: Single-Copy and Repetitive Sequence Markers -- Chapter 18. Random Amplified Polymorphic DNA (RAPD) -- Chapter 19. Amplified Fragment Length Polymorphism (AFLP) -- Part VI: Applied Marks -- Chapter 20. Internal and External Tags -- Chapter 21. Electronic Tags -- Chapter 22. Otolith Thermal Marking -- Part VII: Stock Identification Data Analysis -- Chapter 23. Experimental Design and Sampling Strategies for Mixed-Stock Analysis -- Chapter 24. An Introduction to Statistical Algorithms Useful in Stock Composition Analysis. , Chapter 25. Classical Discriminant Analysis, Classification of Individuals, and Source Population Composition of Mixtures -- Chapter 26. Neural Networks Used in Classification with Emphasis on Biological Populations -- Chapter 27. Maximum Likelihood Estimation of Stock Composition -- Chapter 28. Estimation of Movement from Tagging Data -- Part VIII: Application of Stock Identification Data in Resource Management -- Chapter 29. Stock Identification for Conservation of Threatened or Endangered Species -- Chapter 30. The Role of Stock Identification in Formulating Fishery Management Advice -- Chapter 31. Identifying Fish Farm Escapees -- Index.
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  • 2
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Fishery sciences. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (589 pages)
    Edition: 2nd ed.
    ISBN: 9780123972583
    DDC: 333.9/5611
    Language: English
    Note: Front Cover -- Stock IdentificationMethods: Applicationsin Fishery Science -- Stock IdentificationMethods: Applicationsin Fishery Science -- Copyright -- Contents -- List of Contributors -- Foreword -- Introduction -- Chapter one - Stock Identification Methods: An Overview -- GLOSSARY -- ACKNOWLEDGMENTS -- REFERENCES -- Chapter two - The Unit Stock Concept: Bounded Fish and Fisheries -- 2.1 THE UNIT STOCK IMPERATIVE -- 2.2 OPERATIONAL DEFINITIONS OF UNIT STOCK -- 2.3 FISHING ACROSS BOUNDARIES -- 2.4 MIXED AND SHIFTING STOCKS -- 2.5 COMPLEX LIFE CYCLES -- 2.6 STOCKS AS CLOSED POPULATIONS -- 2.7 NATAL HOMING MECHANISMS -- 2.8 "SELF-RECRUITMENT" IN REEF FISHES -- 2.9 OPEN POPULATIONS -- 2.10 BETWEEN CLOSED AND OPEN POPULATIONS: CONNECTIVITY -- 2.11 WHAT DO WE NEED TO KNOW TO TRACK FISH STOCKS? -- REFERENCES -- FURTHER READING -- Chapter three - Fishery Management Strategies for Addressing Complex Spatial Structure in Marine Fish Stocks -- 3.1 INTRODUCTION -- 3.2 QUOTA SETTING -- 3.3 SPATIAL MANAGEMENT STRATEGIES -- 3.4 SUMMARY AND CONCLUSIONS -- ACKNOWLEDGMENTS -- REFERENCES -- Chapter four - Quantitative Traits -- SCOPE OF THE CHAPTER -- 4.1 INTRODUCTION -- 4.2 NATURE OF VARIATION IN QUANTITATIVE TRAITS -- 4.3 DISENTANGLING SOURCES OF PHENOTYPIC VARIATION -- 4.4 CONCLUSIONS -- ACKNOWLEDGMENTS -- REFERENCES -- Chapter five - The Continuing Role of Life History Parameters to Identify Stock Structure -- ABBREVIATIONS -- 5.1 INTRODUCTION -- 5.2 DISTRIBUTION AND ABUNDANCE -- 5.3 SIZE AND AGE -- 5.4 REPRODUCTION AND RECRUITMENT -- 5.5 CONCLUSIONS -- ACKNOWLEDGMENTS -- REFERENCES -- Chapter six - Morphometric Landmarks -- 6.1 INTRODUCTION -- 6.2 METHODOLOGICAL PROTOCOLS -- 6.3 INTERPRETATION OF MORPHOMETRIC DIFFERENCES -- 6.4 DISCUSSION -- ACKNOWLEDGMENTS -- REFERENCES -- Chapter seven - Morphometric Outlines -- 7.1 INTRODUCTION -- 7.2 METHODS. , 7.3 INTERPRETATION -- 7.4 CASE STUDIES IN STOCK IDENTIFICATION -- 7.5 DISCUSSION -- ACKNOWLEDGMENTS -- REFERENCES -- Chapter eight - Analysis of Growth Marks in Calcified Structures: Insights into Stock Structure and Migration Pathways -- 8.1 INTRODUCTION -- 8.2 METHODOLOGY -- 8.3 CONCLUSIONS AND FUTURE DIRECTIONS -- REFERENCES -- Chapter nine - Meristics -- 9.1 INTRODUCTION -- 9.2 METHODOLOGY -- 9.3 CASE STUDIES IN STOCK IDENTIFICATION -- 9.4 CONCLUSIONS -- ACKNOWLEDGMENTS -- REFERENCES -- Chapter ten - Parasites as Biological Tags -- 10.1 INTRODUCTION -- 10.2 SELECTION OF PARASITES FOR USE AS TAGS -- 10.3 METHODOLOGY -- 10.4 COLLECTION OF HOSTS AND PARASITES -- 10.5 INTERPRETATION OF RESULTS -- 10.6 EXAMPLE CASE STUDIES -- REFERENCES -- Chapter eleven - Chemical Composition of Fish Hard Parts as a Natural Marker of Fish Stocks -- 11.1 PRINCIPLES OF CHEMISTRY APPLICATIONS TO FISH HARD PARTS -- 11.2 METHODOLOGY -- 11.3 CASE STUDIES -- 11.4 CONCLUSION -- REFERENCES -- Chapter twelve - Fatty Acid Profiles as Natural Marks for Stock Identification -- 12.1 INTRODUCTION -- 12.2 METHODOLOGY -- 12.3 CASE HISTORIES -- 12.4 DISCUSSION -- REFERENCES -- Chapter thirteen - Application of Mitochondrial DNA in Stock Identification -- ABBREVIATIONS -- SCOPE OF THE CHAPTER -- 13.1 INTRODUCTION -- 13.2 METHODS FOR THE ANALYSIS OF MTDNA -- 13.3 FISH STOCK IDENTIFICATION: INSIGHTS FROM MTDNA DATA ANALYSIS -- 13.4 CONCLUSIONS -- GLOSSARY -- REFERENCES -- Chapter fourteen - The Nuclear Genome: Neutral and Adaptive Markers in Fisheries Science -- ABBREVIATIONS -- 14.1 INTRODUCTION -- 14.2 METHODOLOGY-THE NUCLEAR "TOOL KIT" FOR STOCK IDENTIFICATION -- 14.3 MATCHING EACH QUESTION WITH THE RIGHT TOOL -- 14.4 CONCLUSIONS -- ACKNOWLEDGMENTS -- REFERENCES -- Chapter fifteen - The Use of Early Life Stages in Stock Identification Studies -- 15.1 STOCK DEFINITIONS. , 15.2 ROLE OF EARLY LIFE STAGE INFORMATION IN THE STOCK CONCEPT -- 15.3 USE OF EARLY LIFE STAGES IN STOCK IDENTIFICATION -- 15.4 EXAMPLES OF EARLY LIFE STAGE INFORMATION IN THE DEFINITION OF STOCKS -- 15.5 FUTURE DIRECTIONS AND CONCLUSIONS -- ACKNOWLEDGMENTS -- REFERENCES -- Chapter sixteen - Conventional and Radio Frequency Identification (RFID) Tags -- 16.1 A HISTORY OF TAGGING AND ITS USE IN STOCK IDENTIFICATION STUDIES -- 16.2 EXTERNAL TAG TYPES -- 16.3 INTERNAL TAG TYPES -- 16.4 CHOOSING THE APPROPRIATE TAG -- 16.5 TAGGING METHODS -- 16.6 FISH MOVEMENT PATTERN AND CONNECTIVITY TAGGING STUDIES -- 16.7 TAGGING DATA ANALYSIS FOR MOVEMENT PATTERN STUDIES -- 16.8 CONCLUSIONS -- ACKNOWLEDGMENTS -- REFERENCES -- FURTHER READING -- Chapter seventeen - Acoustic and Radio Telemetry -- 17.1 INTRODUCTION -- 17.2 TECHNOLOGY -- 17.3 ADVANTAGES AND DISADVANTAGES OF ACOUSTIC TELEMETRY -- 17.4 CONSIDERATIONS FOR STUDY DESIGN -- 17.5 DATA ANALYSIS -- 17.6 CASE STUDIES -- 17.7 DISCUSSION -- ACKNOWLEDGMENTS -- REFERENCES -- FURTHER READING -- Chapter eighteen - Estimation of Movement from Tagging Data -- 18.1 INTRODUCTION -- 18.2 DISCRETE TIME/DISCRETE STOCK MODELS -- 18.3 CONTINUOUS TIME/SPACE MODELS -- 18.4 SUMMARY AND CHALLENGES -- REFERENCES -- Chapter nineteen - Telemetry Analysis of Highly Migratory Species -- 19.1 INTRODUCTION -- 19.2 TAGGING STUDY ROAD MAP -- 19.3 SATELLITE LINKED RADIO TRANSMITTERS: A TOOL FOR ALL SCALES BUT NOT ALL CREATURES -- 19.4 ARCHIVAL TAGS: THERE ARE MANY FISH IN THE SEA -- 19.5 GEOLOCATION: WHERE DID MY FISH GO? -- 19.6 LIGHT BASED GEOLOCATION -- 19.7 BEYOND LIGHT -- 19.8 IMPROVING GEOLOCATION: ALGORITHMIC APPROACH -- 19.9 THE STATISTICAL APPROACH: STATE-SPACE MODELS AND THE KALMAN FILTER -- 19.10 BEHAVIOR MODES -- 19.11 BAYESIAN INFERENCE -- 19.12 DEFINING STOCK BOUNDARIES: HOME RANGE AND UTILIZATION DISTRIBUTION. , 19.13 HIDDEN MARKOV MODELS -- 19.14 DEPTH: THE THIRD DIMENSION -- 19.15 SYNTHESIS: FROM OBSERVATION TO INFERENCE AND APPLICATION -- 19.16 CONCLUSIONS -- ACKNOWLEDGMENTS -- REFERENCES -- Chapter twenty - Sampling for Interdisciplinary Analysis -- 20.1 INTRODUCTION -- 20.2 BASIC ASPECTS -- 20.3 SAMPLING IN SPACE -- 20.4 SAMPLING IN TIME -- 20.5 SAMPLING IN THE SPAWNING AREA AND SPAWNING TIME -- 20.6 SAMPLE SIZE -- 20.7 APPLYING ALL THE APPROACHES TO THE SAME SPECIMEN -- 20.8 LOGISTICS, OPERATION, AND ORGANIZATION OF THE SAMPLING PROCESS -- 20.9 EXPLORATORY DATA ANALYSIS -- 20.10 CONCLUSIONS -- REFERENCES -- Chapter twenty one - Simulation Modeling as a Tool for Synthesis of Stock Identification Information -- 21.1 INTRODUCTION -- 21.2 SIMULATION MODELING TO TEST HYPOTHESES REGARDING STOCK STRUCTURE AND MOVEMENT OF FISH -- 21.3 INCORPORATING SPATIAL STRUCTURE AND CONNECTIVITY IN POPULATION DYNAMICS MODELS -- 21.4 CASE STUDIES -- 21.5 OPPORTUNITIES AND LIMITATIONS -- 21.6 CONCLUSIONS -- ACKNOWLEDGMENTS -- REFERENCES -- Chapter twenty two - Interdisciplinary Evaluation of Spatial Population Structure for Definition of Fishery Management Units -- 22.1 INTRODUCTION -- 22.2 A PROCESS FOR INTERDISCIPLINARY STOCK IDENTIFICATION -- 22.3 CASE STUDIES -- 22.4 CONCLUSIONS -- ACKNOWLEDGMENTS -- REFERENCES -- Index.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Reviews in fish biology and fisheries 10 (2000), S. 91-112 
    ISSN: 1573-5184
    Keywords: fisheries ; morphometric ; stock identification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Geographic variation in morphometry has been used todiscriminate local forms of fish for over a century. The historical development of stock identificationmethods has paralleled the advancement of morphometrictechniques. The earliest analyses of morphometricvariables for stock identification were univariatecomparisons, but were soon followed by bivariateanalyses of relative growth to detect ontogeneticchanges and geographic variation among fishstocks. As the field of multivariatemorphometrics flourished, a suite of multivariatemethods was applied to quantify variation in growthand form among stocks. More recent advances have beenfacilitated by image processing techniques, morecomprehensive and precise data collection, moreefficient quantification of shape, and new analyticaltools. Many benchmark case studies and critiquesoffer guidelines for sampling morphometrics andinterpreting multivariate analyses for exploratorystock identification, stock discrimination, and stockdelineation. As examples of morphometric stockidentification based on life history differences,allometric patterns of crustacean secondary sexcharacters have been used to detect geographicvariation in size at maturity, and morphometriccorrelates to smoltification have been used todiscriminate salmon from different rivers. Morphometric analysis provides a powerful complementto genetic and environmental stock identificationapproaches. The challenge for the future ofmorphometric stock identification is to develop aconsensus on biological interpretations of geometricanalyses, similar to the conventional interpretationsof size and shape from traditional multivariatemorphometrics.
    Type of Medium: Electronic Resource
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  • 4
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    In:  http://aquaticcommons.org/id/eprint/15204 | 403 | 2014-05-30 07:26:16 | 15204 | United States National Marine Fisheries Service
    Publication Date: 2021-07-04
    Description: Analysis of 32 years of standardized survey catches (1967–98) indicated differential distribution patterns for the longfin inshore squid (Loligo pealeii) over the northwest Atlantic U.S. continental shelf, by geographic region, depth, season, and time of day. Catches were greatest in the Mid-Atlantic Bight, where there were significantly greater catches in deep water during winter and spring, and in shallow water during autumn. Body size generally increased with depth in all seasons. Large catches of juveniles in shallow waters off southern New England during autumn resulted from inshore spawning observed during late spring and summer; large proportions of juveniles in the Mid-Atlantic Bight during spring suggest that substantial winter spawning also occurs. Few mature squid were caught in survey samples in any season; the majority of these mature squid were captured south of Cape Hatteras during spring. Spawning occurs inshore from late spring to summer and the data suggest that winter spawning occurs primarily south of Cape Hatteras.
    Keywords: Biology ; Fisheries ; Management
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 200-213
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  • 5
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    In:  http://aquaticcommons.org/id/eprint/15229 | 403 | 2014-06-01 18:57:16 | 15229 | United States National Marine Fisheries Service
    Publication Date: 2021-07-05
    Description: Stock-rebuilding time isopleths relate constant levels of fishing mortality (F), stock biomass, and management goals to rebuilding times for overfished stocks. We used simulation models with uncertainty about FMSY and variability in annual intrinsic growth rates (ry) to calculate rebuilding time isopleths for Georges Bank yellowtail flounder, Limanda ferruginea, and cowcod rockfish, Sebastes levis, in the Southern California Bight. Stock-rebuilding time distributions from stochastic models were variable and right-skewed, indicating that rebuilding may take less or substantially more time than expected. The probability of long rebuilding times increased with lower biomass, higher F, uncertainty about FMSY, and autocorrelation in ry values. Uncertainty about FMSY had the greatest effect on rebuilding times. Median recovery times from simulations were insensitive to model assumptions about uncertainty and variability, suggesting that median recovery times should be considered in rebuilding plans. Isopleths calculated in previous studies by deterministic models approximate median, rather than mean, rebuilding times. Stochastic models allow managers to specify and evaluate the risk (measured as a probability) of not achieving a rebuilding goal according to schedule. Rebuilding time isopleths can be used for stocks with a range of life histories and can be based on any type of population dynamics model. They are directly applicable with constant F rebuilding plans but are also useful in other cases. We used new algorithms for simulating autocorrelated process errors from a gamma distribution and evaluated sensitivity to statistical distributions assumed for ry. Uncertainty about current biomass and fishing mortality rates can be considered with rebuilding time isopleths in evaluating and designing constant-F rebuilding plans.
    Keywords: Fisheries ; Management
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 519-536
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  • 6
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    In:  richard.mcbride@noaa.gov | http://aquaticcommons.org/id/eprint/14501 | 403 | 2014-02-13 04:16:59 | 14501 | United States National Marine Fisheries Service
    Publication Date: 2021-06-26
    Description: The modern fishery for Tilefish (Lopholatilus chamaeleonticeps) developed during the 1970s, offshore of southern New England, in the western North Atlantic Ocean. The population quickly became over exploited, with documented declines in catch rates and changes in demographic traits. In an earlier study, median size at maturity (L50) of males declined from 62.6 to 38.6 cm fork length (FL) and median age at maturity (A50) of males declined from 7.1 to 4.6 years between 1978 and 1982. As part of a cooperative research effort to improve the data-limited Tilefish assessment, we updated maturity parameter estimates through the use of an otolith aging method and macroscopic and microscopic evaluations of gonads. The vital rates for this species have continued to change, particularly for males. By 2008, male L50 and A50 had largely rebounded, to 54.1 cm FL and 5.9 years. Changes in female reproductive schedules were less variable among years, but the smallest L50 and youngest A50 were recorded in 2008. Tilefish are dimorphic, where the largest fish aremale, and male spawning success is postulated to be socially mediated. These traits may explain the initial rapid decline and the subsequent rebound in male L50 and A50 and less dramatic effects on females. Other factors that likely contribute to the dynamics of maturity parameter estimates are the relatively short period of overfishing and the amount of time since efforts to rebuild this fishery began, as measured in numbers of generations. This study also confirms the gonochoristic sexual pattern of the northern stock, and it reveals evidence of age truncation and relatively high proportions of immature Tilefish in the recent catch.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 161-174
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  • 7
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    In:  anthony.wood@noaa.gov | http://aquaticcommons.org/id/eprint/14509 | 403 | 2014-02-13 20:42:03 | 14509 | United States National Marine Fisheries Service
    Publication Date: 2021-06-26
    Description: From 2003 to 2006, 44,882 Yellowtail Flounder (Limanda ferruginea) were captured and released with conventional disc tags in the western North Atlantic as part of a cooperative Yellowtail Flounder tagging study. From these releases, 3767 of the tags were recovered. The primary objectives of this tagging program were to evaluate the mortality and large-scale movement of Yellowtail Flounder among 3 stock areas in New England. To explore mortality, survival and recovery rate were estimated from traditionalBrownie tag-recovery models fitted to the data with Program MARK. Models were examined with time and sex-dependent parameters over several temporal scales. The models with a monthly scale for both survival and recovery rate had the best overall fit and returned parameter estimates that were biologically reasonable. Estimates of survival from the tag-recovery models confirm the general magnitude of total mortality derived from age-based stock assessments but indicate that survival was greater for females than for males. In addition to calculating mortality estimates, we examined the pattern of release and recapture locations and revealed frequent movements within stock areas and less frequent movement among stock areas. The collaboration of fishermen and scientists for this study successfully resulted in independent confirmation of previously documented patterns of movement and mortality rates from conventional age-based analyses.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 279-287
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  • 8
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    In:  http://aquaticcommons.org/id/eprint/8737 | 403 | 2012-06-07 14:46:02 | 8737 | United States National Marine Fisheries Service
    Publication Date: 2021-06-26
    Description: Despite its recreational and commercial importance, the movement patterns and spawning habitats of winter flounder (Pseudopleuronectes americanus) in the Gulf of Maine are poorly understood. To address these uncertainties, 72 adult winter flounder (27–48 cm) were fitted with acoustic transmitters and tracked by passive telemetry in the southern Gulf of Maine between 2007 and 2009. Two sympatric contingents of adult winter flounder were observed, which exhibited divergent spawning migrations. One contingent remained in coastal waters during the spawning season,while a smaller contingent of winter flounder was observed migrating to estuarine habitats. Estuarine residence times were highly variable, and ranged from 2 to 91 days (mean=28days). Flounder were nearly absent from the estuary during the fall and winter months and were most abundant in the estuary from late spring to early summer. The observedseasonal movements appeared to be strongly related to water temperature. This is the first study to investigate the seasonal distribution, migration, and spawning behavior of adult winter flounder in the Gulf of Maine by using passive acoustic telemetry. This approach offered valuable insightinto the life history of this species in nearshore and estuarine habitats and improved the information available for the conservation and management of this species.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 408-419
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  • 9
    Publication Date: 2022-05-26
    Description: Author Posting. © The Author(s), 2012. This is the author's version of the work. It is posted here by permission of Oxford University Press for personal use, not for redistribution. The definitive version was published in ICES Journal of Marine Science 69 (2012): 697-702, doi:10.1093/icesjms/fss090.
    Description: An international symposium on decadal changes in the International Council for the Exploration of the Sea (ICES) and North Atlantic Fisheries Organization (NAFO) regions of the North Atlantic from 2001 to 2009, jointly sponsored by ICES and NAFO, took place in Santander, Spain, from 10 to 12 May 2011. During the period covered by the symposium, the upper ocean warmed, particularly in temperate and Arctic–boreal regions, and there were major biogeographic shifts and changes in the phenology of the biota that appear to be related to the physical changes.
    Description: 2013-05-01
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
    Format: application/pdf
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  • 10
    Publication Date: 2022-05-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Zemeckis, D. R., Dean, M. J., DeAngelis, A. I., Van Parijs, S. M., Hoffman, W. S., Baumgartner, M. F., Hatch, L. T., Cadrin, S. X., & McGuire, C. H. Identifying the distribution of Atlantic cod spawning using multiple fixed and glider-mounted acoustic technologies. ICES Journal of Marine Science, 76(6), (2019): 1610-1625, doi: 10.1093/icesjms/fsz064.
    Description: Effective fishery management measures to protect fish spawning aggregations require reliable information on the spatio-temporal distribution of spawning. Spawning closures have been part of a suite of fishery management actions to rebuild the Gulf of Maine stock of Atlantic cod (Gadus morhua), but difficulties remain with managing rebuilding. The objective of this study was to identify the spatial and temporal distribution of cod spawning during winter in Massachusetts Bay to improve our understanding of cod spawning dynamics and inform fisheries management. Spawning was investigated in collaboration with commercial fishermen during three winter spawning seasons (October 2013–March 2016) using acoustic telemetry and passive acoustic monitoring equipment deployed in fixed-station arrays and mounted on mobile autonomous gliders. Tagged cod exhibited spawning site fidelity and spawning primarily occurred from early November through January with a mid-December peak and some inter-annual variability. The spatial distribution of spawning was generally consistent among years with multiple hotspots in areas 〉50 m depth. Current closures encompass most of spawning, but important areas are recommended for potential modifications. Utilizing multiple complementary technologies and deployment strategies in collaboration with commercial fishermen enabled a comprehensive description of spawning and provides a valuable model for future studies.
    Description: Year 1 was jointly funded by The Nature Conservancy and Massachusetts Division of Marine Fisheries. The remainder of this research was funded through the 2013–2014 NOAA Saltonstall Kennedy grant program (Award No. NA14NMF4270027) with additional support from the Nature Conservancy and Cabot Family Charitable Foundation.
    Repository Name: Woods Hole Open Access Server
    Type: Article
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