Download or read book Studies on Pacific Herring Clupea Pallasi Spawning in Prince William Sound Following the 1989 Exxon Valdez Oil Spill 1989 1992 written by Evelyn Dale Biggs and published by . This book was released on 1997 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Impacts of Oil Spill Disasters on Marine Habitats and Fisheries in North America written by J. Brian Alford and published by CRC Press. This book was released on 2014-10-29 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: At an increasingly global scale, aquatic scientists are heavily entrenched in understanding the fate of marine ecosystems in the face of human-altered environments. Oil spill disasters, especially large-scale ones like the 2010 Deepwater Horizon tragedy, have left uncertain and indelible marks on marine ecosystems. Impacts of Oil Spill Disasters on Marine Habitats and Fisheries in North America contains independent scientific findings and critical reviews from experts researching the impacts of the Exxon Valdez, Ixtoc I, and Deepwater Horizon oil spills on coastal fishery resources. Comprised of three sections, this seminal work: Details the physiological effects of oil-derived compounds on fishes, presenting results from field and laboratory investigations Addresses the science of assessing the impacts of oil spills and oil response measures on coastal habitats, with an emphasis on salt-marsh ecosystems in the Gulf of Mexico Explores the quantified and potential impacts of oil spills on population and community dynamics of commercial and recreational fishery species Provides newly released results from the 25-year recovery of marine mammals, birds, and fishes following the Exxon Valdez spill Chapters discuss new techniques for collecting and processing blood samples for toxicity testing, new aerial radar techniques for detecting unseen oil on marshes, consequences of oil prevention measures (such as diverting fresh water to estuaries or building sand berms to stop oil) on coastal fishery resources, and non-traditional methods for assessing the herring stock in Prince William Sound, Alaska, USA following the Exxon Valdez disaster.
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
Download or read book Causes and Consequences of Pacific Herring Clupea Pallasii Deep Spawning Behavior written by Mark David Thompson and published by . This book was released on 2017 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shifts in the reproductive strategies of marine species can result from ecological disturbance and often lead to either harmful or adaptive population−level effects. Pacific herring (Clupea pallasii) can exhibit remarkable plasticity in spawn density and spatial distribution, shifting in response to both climatic and anthropogenic pressure. To test alternative factors leading to recently observed and previously uninvestigated deep spawning events (−30 m, 8 x the preceding 25-year mean), we surveyed spawn sites varying in motorized boat traffic, predator density, and sea surface temperature, and conducted a field experiment to test depth effects (at −3, −15, and −30 meters) on the survival rates of herring eggs exposed and protected from predation. We found herring spawn to −44 m, and strong evidence for a positive relationship between depth of suitable habitat and maximum spawning depth (with a possible link to surface temperatures), which was magnified when spawner density was high. This result is consistent with historical records of fisheries independent survey data collected from 1989 to 2015, showing an increase in maximum spawning depth with greater biomass of spawners. Finally, experimental evidence indicated that egg survival decreased, on average, by 20 % at −30 m relative to −3 m depths. If declining trends in spawning distribution continue as sea temperatures rise, the prevalence of deep spawning events may expand as herring become further concentrated into deep fjords and smaller geographic areas, adding further risk to already declining stocks.
Download or read book Fluctuations in the Supply of Herring Clupea Pallasii in Prince William Sound Alaska written by George A. Rounsefell and published by . This book was released on 1932 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Exxon Valdez Oil Spill Symposium written by Stanley Donald Rice and published by . This book was released on 1996 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2002 with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fluctuations in the Supply of Herring Clupea Pallasii in Price William Sound Alaska written by George A. Rounsefell and published by . This book was released on 1932 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cold Water Diving for Science written by Stephen C. Jewett and published by . This book was released on 2001 with total page 108 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:
Download or read book Injury to Salmon Eggs and Preemergent Fry in Prince William Sound written by and published by . This book was released on 1994 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes statistics on chum salmon also.
Download or read book Avian and Shallow Water Community Response to Pacific Herring Clupea Pallasii Spawn Events written by Heidi Stewart and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pacific Herring play a critical role in the food web of the Salish Sea. The Cherry Point stock, centered 30 miles north of Bellingham Bay, has declined roughly 97% since the 1970s. This massive decline is a point of concern for environmental and fishery managers and has led to research into both the initial decline and the stock's inability to recover. One key data gap in need of research is whether the Cherry Point herring stock is experiencing increased predation from the nearshore fish, bird, and invertebrate community due to its unique late spawn timing and spawning behavior. To that end, I investigated predation on herring spawn by deploying predator exclusion enclosures and remote underwater time lapse cameras at spawning locations of both the declining Cherry Point stock and Semiahmoo Bay, a nearby stock with stable population trends. Bird surveys in 2021 indicate that avian abundance was highest before spawning occurred and that most birds had left the spawning area before eggs were deposited. The exclusion of avian, large fish, and invertebrate predators from accessing the eggs did not significantly affect the survival of eggs when compared to areas exposed to predation from these groups. There was significant egg mortality in both the control and excluded plots over the spawning period. Remote underwater time-lapse cameras showed higher abundances of fish predators and greater predator diversity at the Cherry Point spawning site compared to Semiahmoo Bay, but this could be driven by seasonal differences. A non-metric multidimensional scaling analysis of the time-lapse data showed slight differences between pre-spawn predator assemblages and predator assemblages during and after the incubation period. This study shows that while predation from larger fauna did not have a significant impact on Pacific Herring egg survival for the years of 2021 and 2022, egg mortality was high and is likely influenced by a multitude of factors including spawning time and habitat, water temperature, and numerous smaller fish and invertebrate species that take advantage of the lipid-rich food source.
Download or read book Reviews of Environmental Contamination and Toxicology 198 written by David M. Whitacre and published by Springer Science & Business Media. This book was released on 2009-03-02 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews of Environmental Contamination and Toxicology attempts to provide concise, critical reviews of timely advances, philosophy and significant areas of accomplished or needed endeavor in the total field of xenobiotics, in any segment of the environment, as well as toxicological implications.
Download or read book Injury to Pink Salmon Embryos in Prince William Sound Field Monitoring written by Andrew K. Craig and published by . This book was released on 1996 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pink salmon embryo and embryo to pre-emergent fry survival were examined in intertidal and upstream areas of oil contaminated and unaffected (reference) streams in Prince William Sound. This report focuses upon studies performed between Oct. 1, 1994 and Sept. 30, 1995.
Download or read book Spawning Areas of the Pacific Herring Clupea Surf Smelt Hypomesus and the Pacific Sand Lance Ammodytes in Central Puget Sound Washington written by Dan Penttila and published by . This book was released on 1999 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pollution Abstracts written by and published by . This book was released on 1997 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Washington Sea Grant Project Completion Summary Report written by Lorenz Hauser and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
