Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Ecosystem Level Studies Of Juvenile Pacific Herring And Juvenile Pink Salmon In Prince William Sound Alaska
Download Ecosystem Level Studies Of Juvenile Pacific Herring And Juvenile Pink Salmon In Prince William Sound Alaska full books in PDF, epub, and Kindle. Read online Ecosystem Level Studies Of Juvenile Pacific Herring And Juvenile Pink Salmon In Prince William Sound Alaska ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Ecosystem-level Studies of Juvenile Pacific Herring and Juvenile Pink Salmon in Prince William Sound, Alaska by : William G. Pearcy
Download or read book Ecosystem-level Studies of Juvenile Pacific Herring and Juvenile Pink Salmon in Prince William Sound, Alaska written by William G. Pearcy and published by . This book was released on 2001 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Future of Fisheries Science in North America by : Richard J. Beamish
Download or read book The Future of Fisheries Science in North America written by Richard J. Beamish and published by Springer Science & Business Media. This book was released on 2009-02-07 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fisheries science in North America is changing in response to a changing climate, new technologies, an ecosystem approach to management and new thinking about the processes affecting stock and recruitment. Authors of the 34 chapters review the science in their particular fields and use their experience to develop informed opinions about the future. Everyone associated with fish, fisheries and fisheries management will find material that will stimulate their thinking about the future. Readers will be impressed with the potential for new discoveries, but disturbed by how much needs to be done in fisheries science if we are to sustain North American fisheries in our changing climate. Officials that manage or fund fisheries science will appreciate the urgency for the new information needed for the stewardship of fish populations and their ecosystems. Research organizations may want to keep some extra copies for a future look back into the thoughts of a wide range of fisheries professionals. Fisheries science has been full of surprises with some of the surprises having major economic impacts. It is important to minimize these impacts as the demand for seafood increases and the complexities of fisheries management increase.
Book Synopsis Juvenile Pacific Herring (Clupea Pallasi) Feeding Ecology in Prince William Sound, Alaska by : Robert James Foy
Download or read book Juvenile Pacific Herring (Clupea Pallasi) Feeding Ecology in Prince William Sound, Alaska written by Robert James Foy and published by . This book was released on 2000 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Jennifer Lynn Boldt Publisher :Ann Arbor, Mich. : University Microfilms International ISBN 13 : Total Pages :470 pages Book Rating :4.:/5 (488 download)
Book Synopsis Ecology of Juvenile Pink Salmon in the North Gulf of Alaska and Prince William Sound by : Jennifer Lynn Boldt
Download or read book Ecology of Juvenile Pink Salmon in the North Gulf of Alaska and Prince William Sound written by Jennifer Lynn Boldt and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 2001 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Increased production of salmon in Alaska has been accompanied by a decrease in average body size and decreased wild stocks, indicating a possible density-dependent response to increases in salmon populations and hatchery releases. Pink salmon have a short two-year life cycle and most post-hatch mortality is thought to occur during their first months at sea; therefore, processes in the early marine residence period may determine abundance. Geographic and seasonal patterns in distribution, growth, and condition of juvenile pink salmon during their first months at sea were examined in Chapter 1. The migration of pink salmon from Prince William Sound (PWS) occurred over several months. Fish lengths, weights, and energy contents varied geographically and seasonally. Pink salmon energy content was hightest on the Gulf of Alaska (GOA) shelf in July and August and lowest in PWS in July, indicating that growth conditions were better on the GOA shelf. Spatial and temporal variation in growth and condition is indicative of disparate feeding opportunities for juvenile pink salmon. An unusual aspect of this study was the concurrent collection of zooplankton and fish in PWS and on the GOA shelf. Geographic and seasonal changes in juvenile pink salmon diets were examined during their first six months at sea in Chapter 2. Pink salmon diets varied geographically and seasonally, and prey size increased as fish grew. A unique opportunity existed to compare the energy content thermally marked hatchery pink salmon to their wild counterparts in PWS (Chapter 3). Fish condition varied geographically, however, there were no differences among hatchery groups and/or wild pink salmon at any one location. This indicates that fish were staying together as a group. In Chapter 4, pink salmon consumption was estimated to represent a small fraction of the production but potentially a large proportion of the available standing stock of zooplankton in PWS. Geographic variations in fish condition, diet, and zooplankton densities were observed in this study. This supports the hypothesis that local processes, including food depletion and/or zooplankton availability are important to juvenile pink salmon"--Leaves iii-iv.
Book Synopsis U.S. GLOBEC Biological and Physical Studies of Plankton, Fish and Higher Trophic Level Production, Distribution, and Variability in the Northeast Pacific by : Harold P. Batchelder
Download or read book U.S. GLOBEC Biological and Physical Studies of Plankton, Fish and Higher Trophic Level Production, Distribution, and Variability in the Northeast Pacific written by Harold P. Batchelder and published by . This book was released on 2005 with total page 396 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
Book Synopsis Small and Mesoscale Processes and Their Impact on the Large Scale by : Hans van Haren
Download or read book Small and Mesoscale Processes and Their Impact on the Large Scale written by Hans van Haren and published by . This book was released on 2004 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Comparison of the Feeding Ecology and Growth of Juvenile Pink Salmon (Oncorhynchus Gorbuscha) in Northcentral and Southwestern Prince William Sound, Alaska by : David Gerard Parker
Download or read book A Comparison of the Feeding Ecology and Growth of Juvenile Pink Salmon (Oncorhynchus Gorbuscha) in Northcentral and Southwestern Prince William Sound, Alaska written by David Gerard Parker and published by . This book was released on 1997 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Invitation to Submit Restoration Proposals for Federal Fiscal Year 1998 by :
Download or read book Invitation to Submit Restoration Proposals for Federal Fiscal Year 1998 written by and published by . This book was released on 1997 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oceanic Abstracts written by and published by . This book was released on 1997-04 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Federal Fishery Research in the Pacific Northwest Preceding Formation of Northwest Fisheries Center by : M. E. Stansby
Download or read book Federal Fishery Research in the Pacific Northwest Preceding Formation of Northwest Fisheries Center written by M. E. Stansby and published by . This book was released on 1979 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Intertidal Ecology and Life History of Pink Salmon at Olsen Creek, Prince William Sound, Alaska by : John H. Helle
Download or read book Intertidal Ecology and Life History of Pink Salmon at Olsen Creek, Prince William Sound, Alaska written by John H. Helle and published by . This book was released on 1964 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sustaining Wildlands by : Aaron J. Poe
Download or read book Sustaining Wildlands written by Aaron J. Poe and published by University of Arizona Press. This book was released on 2017-11-14 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: When the Exxon Valdez oil tanker ran aground on Bligh Reef in Alaska in 1989 and spilled 11 million gallons of oil, it changed Prince William Sound forever. The catastrophe disrupted the region’s biological system, killing countless animals and poisoning habitats that to this day no longer support some of the local species. The effects have also profoundly altered the way people use this region. Nearly three decades later, changes in recreation use run counter to what was initially expected. Instead of avoiding Prince William Sound, tourists and visitors flock there. Economic revitalization efforts have resulted in increased wilderness access as new commercial enterprises offer nature tourism in remote bays and fjords. This increased visitation has caused concerns that the wilderness may again be threatened—not by oil but rather by the very humans seeking those wilderness experiences. In Sustaining Wildlands, scientists and managers, along with local community residents, address what has come to be a central paradox in public lands management: the need to accommodate increasing human use while reducing the environmental impact of those activities. This volume draws on diverse efforts and perspectives to dissect this paradox, offering an alternative approach where human use is central to sustaining wildlands and recovering a damaged ecosystem like Prince William Sound. Contributors: Brad A. Andres, Chris Beck, Nancy Bird, Dale J. Blahna, Harold Blehm, Sara Boario, Bridget A. Brown, Courtney Brown, Greg Brown, Milo Burcham, Kristin Carpenter, Ted Cooney, Patience Andersen Faulkner, Maryann Smith Fidel, Jessica B. Fraver, Jennifer Gessert, Randy Gimblett, Michael I. Goldstein, Samantha Greenwood, Lynn Highland, Marybeth Holleman, Shay Howlin, Tanya Iden, Robert M. Itami, Lisa Jaeger, Laura A. Kennedy, Spencer Lace, Nancy Lethcoe, Kate McLaughlin, Rosa H. Meehan, Christopher Monz, Karen A. Murphy, Lisa Oakley, Aaron J. Poe, Chandra B. Poe, Karin Preston, Jeremy Robida, Clare M. Ryan, Gerry Sanger, Bill Sherwonit, Lowell H. Suring, Paul Twardock, Sarah Warnock, and Sadie Youngstrom
Book Synopsis Sound Ecosystem Assessment by : T. Mark Willette
Download or read book Sound Ecosystem Assessment written by T. Mark Willette and published by . This book was released on 1996 with total page 86 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 2006 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook of Ecotoxicology by : David J. Hoffman
Download or read book Handbook of Ecotoxicology written by David J. Hoffman and published by CRC Press. This book was released on 2002-11-13 with total page 1316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Completely revised and updated with 18 new chapters, this second edition includes contributions from over 75 international experts. Also, a Technical Review Board reviewed all manuscripts for accuracy and currency. Focusing on toxic substance and how they affect the ecosystems worldwide, the book presents methods for quantifying and measuring ecotoxicological effects in the field and in the lab, as well as methods for estimating, predicting, and modeling in ecotoxicology studies. This is the definitive reference for students, researchers, consultants, and other professionals in the environmental sciences, toxicology, chemistry, biology, and ecology - in academia, industry, and government.
Book Synopsis Pacific Herring Juvenile Winter Survival and Recruitment in Prince William Sound by : Fletcher Sewall
Download or read book Pacific Herring Juvenile Winter Survival and Recruitment in Prince William Sound written by Fletcher Sewall and published by . This book was released on 2020 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small pelagic fish abundances can vary widely over space and time making them difficult to forecast, partially due to large changes in the number of individuals that annually recruit to the spawning population. Recruitment fluctuations are largely driven by variable early life stage survival, particularly through the first winter for cold temperate fishes. Winter survival may be influenced by juvenile fish size, energy stores, and other factors that are often poorly documented, which may hamper understanding recruitment processes for economically and ecologically important marine species. The goal of this research was to improve understanding of recruitment of Pacific herring (Clupea pallasii) within Prince William Sound (PWS) through recruitment modeling and by identifying factors influencing winter survival of young-of-the-year (YOY) herring. Towards this end, my dissertation addresses three specific objectives: 1) incorporate oceanographic and biological variables into a herring recruitment model, 2) describe patterns in growth and condition of PWS YOY herring and their relationship to winter mortality risks, and 3) compare the growth, condition, swimming performance, and mortality of YOY herring that experience different winter feeding levels. In the recruitment modeling study, annual mean numbers of PWS herring recruits-per-spawner were positively correlated with YOY walleye pollock (Gadus chalcogrammus) abundance in the Gulf of Alaska, hence including a YOY pollock index within a standard Ricker model improved herring recruitment estimates. Synchrony of juvenile herring and pollock survival persisted through the three-decade study period, including the herring stock collapse in the early 1990s. While the specific mechanism determining survival is speculative, size-based tradeoffs in growth and energy storage in PWS YOY herring indicated herring must reach a critical size before winter, presumably to reduce size-dependent predation. Large herring switched from growth to storing energy, and ate more high-quality euphausiid prey, which would delay the depletion of lipid stores that compelled lean herring to forage. Lipid stores were highest in the coldest year of the seven-year field study, rather than the year with the best diets. With diets controlled in a laboratory setting, spring re-feeding following restricted winter diets promoted maintenance of size and swimming ability, but had little effect on mortality rates compared to fish continued on restricted rations. Declines in gut mass, even among fully fed herring, and low growth potential suggest limited benefits to winter feeding. Mortalities due to food restriction compounded by disease were highest among herring that fasted through winter months, and among small herring regardless of feeding level. Taken together, these findings illustrate the importance of achieving a critical size and high lipid stores in the critical period before winter to promote YOY herring winter survival and ultimately recruitment.
