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Estimated Size At Recruitment Of Snow Crabs Chionoecetes Opilio Into The Eastern Bering Sea Commercial Fishery
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Book Synopsis Estimated Size-at-recruitment of Snow Crabs, Chionoecetes Opilio, Into the Eastern Bering Sea Commercial Fishery by : Donn Tracy
Download or read book Estimated Size-at-recruitment of Snow Crabs, Chionoecetes Opilio, Into the Eastern Bering Sea Commercial Fishery written by Donn Tracy and published by . This book was released on 1999 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bering Sea Aleutian Islands Crab Fisheries by :
Download or read book Bering Sea Aleutian Islands Crab Fisheries written by and published by . This book was released on 2004 with total page 1018 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Report by : Northwest and Alaska Fisheries Center (U.S.)
Download or read book Monthly Report written by Northwest and Alaska Fisheries Center (U.S.) and published by . This book was released on 1981 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimated Size-at-recruitment for Tanner Crabs, Chionoecetes Bairdi, Into the Eastern Bering Sea Commercial Fishery by : Donn Tracy
Download or read book Estimated Size-at-recruitment for Tanner Crabs, Chionoecetes Bairdi, Into the Eastern Bering Sea Commercial Fishery written by Donn Tracy and published by . This book was released on 1998 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the North Pacific Symposium on Invertebrate Stock Assessment and Management by : National Research Council Canada
Download or read book Proceedings of the North Pacific Symposium on Invertebrate Stock Assessment and Management written by National Research Council Canada and published by NRC Research Press. This book was released on 1998 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a symposium that focused on new, innovative evaluation of the implications and needs for changing management approaches and demands in invertebrate fishery science. Species covered in the presentations include crustaceans, gastropods, echinoderms, and bivalves. Presentations are organized in the following subject areas: assessment of abundance and related parameters; growth, mortality, and yield per recruit; spatial pattern and its implications; the fishing process; population dynamics; the fishery as a selective force; invertebrate fisheries management; and regional perspectives from the north Pacific. The proceedings conclude with a symposium overview.
Book Synopsis Alaska Fishery Research Bulletin by :
Download or read book Alaska Fishery Research Bulletin written by and published by . This book was released on 2005 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reaching Management Objectives Given Uncertainty by : Cody S. Szuwalski
Download or read book Reaching Management Objectives Given Uncertainty written by Cody S. Szuwalski and published by . This book was released on 2014 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: The snow crab (Chionoecetes opilio) population in the eastern Bering Sea historically supported a lucrative fishery, but was declared overfished in 1999. The subsequent rebuilding plan did not rebuild the fishery in the time specified, and low recruitment over this period likely contributed to the failure. A key component of the rebuilding plan for snow crab was the stock assessment on which management advice was based. In common with all stock assessments, there are numerous potential sources of uncertainty associated with the snow crab assessment, but it is not clear which source is most influential. Consequently, it is unclear how research should be focused and how management should respond to these uncertainties. This dissertation: 1) examines the influence of uncertainty on the ability of the assessment method to estimate quantities important to management, 2) reviews existing information on possible environmental drivers of recruitment, 3) presents an `oscillating control' model that links recruitment to changes in the Pacific Decadal Oscillation (PDO), 4) evaluates management strategies given recruitment dynamics driven by the PDO and 5) explores the influence of spatial structure the snow crab population on assessment. The estimation ability of the assessment method was determined using management strategy evaluation methods. The results of the evaluation allowed biases that may have influenced the ability of the management strategy to rebuild the stock to be identified. When all assumptions are correct, the assessment method provides good estimates of management quantities, including mature male biomass and the overfishing level. Data to reduce uncertainty around growth and natural mortality would be most beneficial to improving confidence in assessment estimates of mature male biomass. The 1988/89 regime shift in the North Pacific appears to have shifted the drivers of recruitment dynamics from female spawning biomass to environmental influences related to the winter PDO (winds at Unimak pass and sea surface temperature were also important variables). This conceptual model was evaluated using cross-validation and retrospective analysis, both of which indicate that it is relatively robust to varying levels of information. A potential mechanism for this change in driver is the influence of temperature during regimes on the timing of the ice retreat and its associated consequences (e.g. food availability, length of the pelagic stage in snow crab, and size of cold pool) for the survival of pelagic larvae and juvenile crab. A management strategy evaluation framework using three scenarios (status-quo, regime-based and `oscillating control') for future recruitment was used to evaluate the performance of harvest control rules, including the status-quo, a regime-based approach, constant proportion strategies, and Hilborn's `hold-steady' method. In regime-driven systems, regime-based harvest control rules increase yield and decrease variability at the cost of a higher probability of overfishing. In non-regime-based systems, regime-based harvest control rules slightly decrease yield (with no change in variability), and increase the probability of overfishing under the definitions imposed by US legislation. Finally, the spatial assessment developed to estimate spatially explicit recruitment, fishing mortality and movement was unable to accurately estimate movement parameters, but reasonably good fits to the data were achieved. The fitted spatial population dynamics model was used to simulate data sets to test the ability of a non-spatially structured (aggregate) assessment method to estimate trends in abundance and fishing pressure in the presence of spatial structure. The aggregate assessment method performed well if survey selectivity was well known, but was unable to reliably capture the dynamics of the population without data on survey selectivity. Additional data on movement from tagging studies or winter surveys would be useful to improve the understanding of the influence of spatial structure on snow crab in the eastern Bering Sea.
Book Synopsis Bibliography of Research on Snow Crab (Chionoecetes Opilio) by : A. J. Paul
Download or read book Bibliography of Research on Snow Crab (Chionoecetes Opilio) written by A. J. Paul and published by . This book was released on 2000 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This bibliography of 1,050 entries brings together research on snow crab published in Japan, Russia, Canada, the United States, and other countries" -- preface.
Book Synopsis Fisheries and Aquaculture by : Gustavo Lovrich
Download or read book Fisheries and Aquaculture written by Gustavo Lovrich and published by Oxford University Press. This book was released on 2020-07-08 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the ninth volume of ten in the The Natural History of the Crustacea Series. The chapters in this volume synthesize the diverse topics in fisheries and aquaculture. In the first part of the book, chapters explore worldwide crustacean fisheries. This section comes to a conclusion with two chapters on harvested crustaceans that are usually not within the focus of the mainstream fisheries research, possibly because they are caught by local fishing communities in small-scale operations and sold locally as subsistence activity. In the second part of the book, the authors explore the variety of cultured crustacean species, like shrimps, prawns, lobsters, and crabs. Chapters in the third part of the volume focus on important challenges and opportunities, including diseases and parasitism, the use of crustacean as bioindicators, and their role in biotechnology.
Download or read book Federal Register written by and published by . This book was released on 1978-05 with total page 1482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis King Crabs of the World by : Bradley G. Stevens
Download or read book King Crabs of the World written by Bradley G. Stevens and published by CRC Press. This book was released on 2014-03-18 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: With species existing in all subpolar seas, king crabs are one of the most valuable seafoods. Major fluctuations in their abundance have stimulated a flurry of research and a rapid expansion of the scientific literature in the last decade. King Crabs of the World: Biology and Fisheries Management consolidates extensive knowledge on the biology, systematics, anatomy, life history, and fisheries of king crabs and presents it in a single volume. This book is the first comprehensive scientific reference devoted to the biology and fisheries of king crabs. The first part of the book describes king crabs and their place in the world, covering geographic distribution, depth and temperature ranges, and maps of known habitats. Chapters examine phylogenetic relationships, evolutionary history and phylogeography, internal and external anatomy of king crabs, and the history of North Pacific fisheries. There is also a chapter that presents a comprehensive overview of diseases and other anomalies of king crabs. The second part of the book describes the life history and biology of various king crab species, including embryonic development and environmental factors, the development and biology of larvae, the ecology and biology of juvenile stages, reproductive strategies of fished species, and the growth and feeding of king crabs and their ecological impacts. The third part of the book discusses human and environmental interactions with king crabs through fisheries, management, and ecosystems. Topics include the impacts of fishing—bycatch, handling, and discard mortality—king crab aquaculture and stock enhancement, and king crabs from various regions such as Southern Hemisphere waters, the Barents Sea, and Alaska. A chapter synthesizing various aspects of king crab biology provides an ecosystem-scale perspective and the final chapter presents the author’s outlook on the future of king crab research and populations.
Book Synopsis Aquatic Sciences and Fisheries Abstracts by :
Download or read book Aquatic Sciences and Fisheries Abstracts written by and published by . This book was released on 1992-07 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fisheries Assessment and Management in Data-limited Situations by :
Download or read book Fisheries Assessment and Management in Data-limited Situations written by and published by . This book was released on 2005 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Canadian Journal of Fisheries and Aquatic Sciences by :
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2004 with total page 928 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annual Report - International North Pacific Fisheries Commission by : International North Pacific Fisheries Commission
Download or read book Annual Report - International North Pacific Fisheries Commission written by International North Pacific Fisheries Commission and published by . This book was released on 1993 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Shellfish Research written by and published by . This book was released on 1999 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Report of Meeting - International North Pacific Fisheries Commission by : International North Pacific Fisheries Commission
Download or read book Report of Meeting - International North Pacific Fisheries Commission written by International North Pacific Fisheries Commission and published by . This book was released on 1991 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: