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Expanded Adult Herring Surveys
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Book Synopsis Expanded Adult Herring Surveys by : Peter S. Rand
Download or read book Expanded Adult Herring Surveys written by Peter S. Rand and published by . This book was released on 2018 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydroacoustic surveys were conducted in spring (March-April), beginning in 2013 and continuing through 2016, to assess the biomass of adult spawning Pacific herring in order to establish more accurate estimates of the total herring biomass in Prince William Sound, Alaska, and provide an alert to changes in biomass in different regions.
Book Synopsis Adult Pacific Herring Acoustic Surveys in Prince William Sound by : Peter S. Rand
Download or read book Adult Pacific Herring Acoustic Surveys in Prince William Sound written by Peter S. Rand and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report on the long-term hyroacoustic survey on prespawning biomass of Pacific herring in Prince William Sound during the 5-year period from 2017 to 2021.
Book Synopsis Atlantic Herring (Clupea Harengus Harengus) Fishery Management Plan (FWP) by :
Download or read book Atlantic Herring (Clupea Harengus Harengus) Fishery Management Plan (FWP) written by and published by . This book was released on 1999 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Marine Ecological Field Methods by : Anne Gro Vea Salvanes
Download or read book Marine Ecological Field Methods written by Anne Gro Vea Salvanes and published by John Wiley & Sons. This book was released on 2018-02-05 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive, clear, and detailed guide to procedures for conducting marine ecological field studies Marine Ecological Field Methods is a comprehensive resource that offers the most relevant sampling methodologies for quantitative and qualitative studies of mesopelagic, demersal, littoral, and soft-bottom organisms, as well as relevant physical parameters. The authors describe how various sampling gears work, how to operate them, their limitations, guides on sorting and measuring collected organisms, and how to deal with subsamples of large catches. The text also explains how to use acoustic equipment for monitoring aggregations of organisms, for example fish shoals, as well as the use of sensors for registering environmental variables such as salinity, temperature, oxygen, and light. The text contains cutting-edge research techniques that are in their final stages of development for use in research surveys. Marine Ecological Field Methods is designed to help with the entire procedure for conducting a field study, including the generation of hypotheses, planning field collection of data, conducting field work, data exploration and statistical analysis with the use of R, and presentation of results in a final report. This essential resource: Covers a wide range of techniques and methods for the marine environment Includes tried and trusted methodologies and techniques from a team of noted experts in the field Contains information on sampling equipment ranging from those that are useful in the littoral zone to shallow nearshore areas, including bottles, secchi discs, and gillnets, and finally large trawls, benthic sleds, ROV and advanced technologies for remote sensing in the open ocean. Explores the step-by-step procedures for conducting a field study, from formulating hypotheses to the process of registering and reporting results Written for students and professionals in the field, this vital resource describes marine ecological sampling equipment, methods and analysis, ranging from physical parameters to fish, microalgae, zooplankton, benthos and macroalgae.
Book Synopsis Hearings by : United States. Congress Senate
Download or read book Hearings written by United States. Congress Senate and published by . This book was released on 1967 with total page 2474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fishery Bulletin written by and published by . This book was released on 2000 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis State/Federal Natural Resource Damage Assessment Plan for the Exxon Valdez Oil Spill by :
Download or read book State/Federal Natural Resource Damage Assessment Plan for the Exxon Valdez Oil Spill written by and published by . This book was released on 1989 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies Publisher : ISBN 13 : Total Pages :1442 pages Book Rating :4.:/5 (319 download)
Book Synopsis Department of the Interior and Related Agencies Appropriations for 1968 by : United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies
Download or read book Department of the Interior and Related Agencies Appropriations for 1968 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies and published by . This book was released on 1967 with total page 1442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Alaska Sea Grant College Program Publisher :Alaska Sea Grant College Program ISBN 13 : Total Pages :906 pages Book Rating :4.:/5 (318 download)
Book Synopsis Herring by : Alaska Sea Grant College Program
Download or read book Herring written by Alaska Sea Grant College Program and published by Alaska Sea Grant College Program. This book was released on 2001 with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt: To help solve the unknowns in herring fisheries, and to optimize herring harvest, researchers presented their work at the symposium Herring 2000, in Anchorage, Alaska. The high levels of enthusiasm shared during the symposium are sustained in this prolific and thorough proceedings book, with 50 peer-reviewed research articles on herring biology and ecology worldwide, social and economic aspects of herring fisheries, and herring fisheries management. Winner of a 2002 Apex award.
Book Synopsis Population and Trophic Dynamics of Striped Bass and Blueback Herring in the Connecticut River by : Justin P Davis
Download or read book Population and Trophic Dynamics of Striped Bass and Blueback Herring in the Connecticut River written by Justin P Davis and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Case studies of the ramifications of predator management for prey population dynamics can play a valuable role in developing ecosystem fisheries management. My dissertation focuses on the predator-prey interaction between Striped Bass (Morone saxatilis), an abundant predatory finfish, and an imperiled prey population of anadromous Blueback Herring (Alosa aestivalis). Annual returns of Blueback Herring to the Holyoke Dam on the Connecticut River in southern New England collapsed during the 1980-2000s, coincident with Striped Bass recovery. I studied the abundance and demography of both species in the Connecticut River during 2005-08, measured predation levels, and surveyed the in-river recreational Striped Bass fishery. Herring in 2005-08 were on average younger, smaller, and less likely to be repeat spawners than during the 1960s. These findings suggest elevated mortality operating on adult herring, consistent with other contemporary studies of river herring runs. I estimated that approximately 125,000 Striped Bass were present in the upper 64 km of the river stretch below the Holyoke Dam in spring 2008, and that this predator contingent was capable of consuming 200,000-800,000 adult herring annually. I also estimated that increased in-river recreational Striped Bass harvests might reduce annual predatory losses by 4-10%. I constructed a stage-structured model of the Blueback Herring population spawning above the Holyoke Dam, and used it to a) assess whether Striped Bass predation could explain the collapse of the herring run to the Holyoke Dam, and b) whether reductions in adult herring mortality effected through increased Striped Bass harvest could substantially improve recovery prospects. Model simulations suggested that Striped Bass predation made a substantial contribution to the collapse of the Holyoke herring run: over 50% of model simulations predicted a run crash, and metrics of population resilience and reproductive potential were greatly reduced in the presence of Striped Bass predation. Increased in-river harvests of Striped Bass offer potential to conserve Blueback Herring under some scenarios; however, the requisite harvest levels appear improbable given the observed intensity of the fishery. This study will inform future efforts to conserve river herring and manage Striped Bass populations, and illustrates the trade-offs inherent to ecosystem-based management.
Book Synopsis Department of the Interior and Related Agencies Appropriations for 1968 by : United States. Congress. House. Appropriations
Download or read book Department of the Interior and Related Agencies Appropriations for 1968 written by United States. Congress. House. Appropriations and published by . This book was released on 1967 with total page 1444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technical Report by : Washington (State). Department of Fisheries
Download or read book Technical Report written by Washington (State). Department of Fisheries and published by . This book was released on 1985 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Department of the Interior and Related Agencies Appropriations for Fiscal Year 1968 by : United States. Congress. Senate. Committee on Appropriations
Download or read book Department of the Interior and Related Agencies Appropriations for Fiscal Year 1968 written by United States. Congress. Senate. Committee on Appropriations and published by . This book was released on 1967 with total page 1390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Maine State Government Annual Report by : Maine. Bureau of the Budget
Download or read book Maine State Government Annual Report written by Maine. Bureau of the Budget and published by . This book was released on 1979 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Hudson River Estuary by : Jeffrey S. Levinton
Download or read book The Hudson River Estuary written by Jeffrey S. Levinton and published by Cambridge University Press. This book was released on 2006-01-09 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Hudson River Estuary, first published in 2006, is a scientific biography with relevance to similar natural systems.
Book Synopsis Department of the Interior and Related Agencies Appropriations for Fiscal Year 1968, Hearings Before ... 90-1, on H.R. 9029 by : United States. Congress. Senate. Appropriations Committee
Download or read book Department of the Interior and Related Agencies Appropriations for Fiscal Year 1968, Hearings Before ... 90-1, on H.R. 9029 written by United States. Congress. Senate. Appropriations Committee and published by . This book was released on 1967 with total page 1382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Long-term Ecological Change in the Northern Gulf of Alaska by : R.B. Spies
Download or read book Long-term Ecological Change in the Northern Gulf of Alaska written by R.B. Spies and published by Elsevier. This book was released on 2006-12-12 with total page 609 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive text is a major synthesis on ecological change in the Gulf of Alaska. It encompasses the structural and annual changes, forces of change, long-ecological changes in the atmosphere and ocean, plankton, fish, birds and mammals, and the effects of the 1989 Exxon Valdez Oil Spill. With 5 major sections, Long-term Ecological Change in the Northern Gulf of Alaska first describes the physical features, the atmosphere and physical oceanography, the annual production cycle, the forage base for higher animals and trophic transfer, and the adaptations for survival in this changing environment for 9 portal species. Then, the major forces of change are introduced: climate, geophysics, fisheries and harvesting, species interactions, disease and contaminants. Next, the long-term records of change in physical factors and biological populations are presented, as well as the potential reasons for the biological changes. Following is the history of the Exxon Valdez oil spill and its long-term effects. And, finally, the emergent properties of the ecosystem are discussed and an attempt is made to weigh the importance of the major forcing factors in terms of their temporal and spatial scales of influence. * Examines important data on long-term change in the ecosystem and the forcing factors that are responsible for it * Provides an account of the 1989 Exxon Valdez oil spill with emphasis on the long-term effects * Describes the effects of climate change, geophysical change, species interactions, harvesting, disease, the 1989 oil spill, and marine contaminants on key populations of marine organisms
