Download or read book Long term Monitoring of Humpback Whale Predation on Pacific Herring in Prince William Sound written by John Richard Moran 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 monitoring of the relationship between humpback whale and Pacific herring populations in the Prince William Sound.
Download or read book Long term Monitoring of Humpback Whale Predation in Pacific Herring in Prince William Sound written by John Richard Moran and published by . This book was released on 2018 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: Study of a population of 461 humpback whales foraging in Prince William Sound, from 2007-2009, whose population was estimated using mark-recapture models. The seasonal movement of these whales into the Sound is largely driven by the movements of adult herring.
Download or read book Considering Predation by Humpback Whales in the Mystery of the Failed Recovery of Pacific Herring in Prince William Sound Alaska written by Suzanne F. Teerlink and published by . This book was released on 2011 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Prince William Sound (PWS) in the early 1990s, biomass of an important forage species, Pacific herring (Clupea pallasii), crashed and has since failed to recover. This thesis explores the role that predation by humpback whales (Megaptera novaeangliae) may have in limiting this recovery. This was done by modeling the historic (1980-2009) relationship between these two species using existing data. Mark-recapture estimates of abundance were combined to form the first time series of humpback whale abundance for this area. This time series was then integrated into the age-structured assessment model used by Alaska Department of Fish and Game to manage herring biomass in PWS by adding annual estimates of humpback whale abundance as a covariate to herring mortality. The current (2009) humpback whale population estimate was 191 (SE 32) representing a rate of increase of 4.5% annually. Humpback whale abundance helped to explain variation in mortality of older (ages 5+) herring only, with humpback whales accounting for as much as one-third of all mortality in these ages. However, retrospective analyses of the updated model show that recruitment, and not predation on adult herring, is the most influential factor limiting the recovery of herring in PWS.
Download or read book Population Dynamics of Pacific Herring and Humpback Whales Sitka Sound Alaska 1981 2011 written by Joseph B. Liddle and published by . This book was released on 2015 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Humpback whales are a major predator in Sitka Sound, possibly consuming as much as a half-ton of Pacific herring per day. These large migratory baleen whales congregate in Sitka Sound to feed on schools of Pacific herring which spawn in April. In recent decades humpback whale abundance has increased tremendously in Sitka Sound after recovering from near extinction due to commercial whaling. In order to assess the long-term impact on herring by humpback whales, I estimated humpback whale abundance from 1981 to 2011. To do so I developed a Bayesian mark-recapture method for small sample sizes. I also modified a multi-strata Hilborn model to account for sporadic availability of whales in Sitka Sound. The multi-million dollar sac roe fishery in Sitka Sound is managed by the Alaska Department of Fish and Game (ADF&G) with an Age-Structured Assessment model (ASA). I modified the standard ASA model by including the humpback whale abundance estimates as a covariate for herring natural mortality. I found that there is no significant effect of humpback whales on herring mortality. In fact, both Pacific herring and humpback whale abundance have increased together, reaching their maximum values in 2011. This suggests that some other factor, perhaps better marine survival for both species, is driving their upwards trend.
Download or read book Alaska Herring History written by James Mackovjak and published by University of Alaska Press. This book was released on 2022-07-18 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alaska Herring History is a thoroughly researched, well-documented, and comprehensive chronicle of Alaska’s herring fisheries. Author James Mackovjak describes the evolution of these fisheries from the late nineteenth century to the present, including harvest, processing, markets, and sustained-yield management considerations. The book is divided into three parts based on the purposes for which herring have been harvested. Part I is a history of the reduction (fertilizer/fish meal/fish oil) and cured (salted) herring industries and the bait-herring fisheries; part II is a history of the roe-herring fisheries in Southeast Alaska, Prince William Sound, Kodiak Island, lower Cook Inlet, Togiak, and Norton Sound; and part III is a history of the herring spawn-on-kelp industry. Historical and contemporary photos and illustrations—as well as graphs and charts that help summarize the development and, in some cases, the demise of the fisheries—augment this detailed look at the evolution of Alaska's herring fisheries. Balancing scientific details, historical facts, and personal anecdotes from experts in the field, Alaska Herring History will be of interest to historians, social scientists, biologists, and fishery managers and makes an important contribution to Alaska fisheries literature.
Download or read book Long term Killer Whale Monitoring in Prince William Sound Kenai Fjords written by Craig O. Matkin and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report on population monitoring of killer whales (Orcinus orca) in Prince William Sound over the five year period 2017-2021. The monitoring focuses on two groups which were directly injured by the Exxon Valdez oil spill. Includes an appendix on passive accoustic monitoring of killer whales in the Gulf of Alaska.
Download or read book Meeting to Review Ongoing and Planned Research Concerning Humpback Whales in Glacier Bay and Surrounding Waters in Southeast Alaska written by and published by . This book was released on 1981 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prince William Sound Alaska written by John David Hall and published by . This book was released on 1982 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of Injuries and Recovery Monitoring of Prince William Sound Killer Whales Using Photo identification Techniques written by Marilyn E. Dahlheim and published by . This book was released on 1994 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of the Exxon Valdez Oil Spill on the Abundance and Distribution of Humpback Whales Megaptera Novaeangliae in Prince William Sound written by Marilyn E. Dahlheim and published by . This book was released on 1993 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Mammals Ashore written by Joseph R. Geraci and published by National Aquarium in Baltimore. This book was released on 2005 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive manual for understanding and carrying out marine mammal rescue activities for stranded seals, manatees, dolphins, whales, or sea otters.
Download or read book Fishery Science written by Lee A. Fuiman and published by John Wiley & Sons. This book was released on 2009-02-12 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is now clear that data based on the studies of fish eggs and larvae make a number of unique contributions to fishery science that are crucial for accurate assessment and management of fish populations, including those of commercially important fisheries. This valuable book demonstrates why fish eggs and larvae are important, how the characteristics of early life stages require a somewhat different research approach and how information on early life stages can be applied and interpreted to yield unique insights into fish populations. The editors of Fishery Science have drawn together an extremely useful and well-written book with contributions from internationally respected researchers from North America, Asia and Europe. Chapters include a discussion of the unique nature of early life stages, age and growth, mortality, recruitment, populations analysis, habitats, human impacts and management. A carefully selected set of case studies demonstrates several specific applications of early life history information to a number of fishery problems. Fishery Science was designed to complement existing textbooks and is an essential purchase for all fisheries students and professionals, and for biologists working on the early life stages of fish. This exciting book is also of great value to ecologists, marine, freshwater and environmental scientists, populations biologists and oceanographers. All libraries in universities and research establishments where biological and fishery science are studied and taught should have copies of this book available on their shelves.
Download or read book Primates and Cetaceans written by Juichi Yamagiwa and published by Springer Science & Business Media. This book was released on 2013-11-20 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, the editors present a view of the socioecology of primates and cetaceans in a comparative perspective to elucidate the social evolution of highly intellectual mammals in terrestrial and aquatic environments. Despite obvious differences in morphology and eco-physiology, there are many cases of comparable, sometimes strikingly similar patterns of sociobehavioral complexity. A number of long-term field studies have accumulated a substantial amount of data on the life history of various taxa, foraging ecology, social and sexual relationships, demography, and various patterns of behavior: from dynamic fission–fusion to long-term stable societies; from male-bonded to bisexually bonded to matrilineal groups. Primatologists and cetologists have come together to provide four evolutionary themes: (1) social complexity and behavioral plasticity, (2) life history strategies and social evolution, (3) the interface between behavior, demography, and conservation, and (4) selected topics in comparative behavior. These comparisons of taxa that are evolutionarily distant but live in comparable complex sociocognitive environments boost our appreciation of their sophisticated mammalian societies and can advance our understanding of the ecological factors that have shaped their social evolution. This knowledge also facilitates a better understanding of the day-to-day challenges these animals face in the human-dominated world and may improve the capacity and effectiveness of our conservation efforts.
Download or read book Fish Reproductive Biology written by Tore Jakobsen and published by John Wiley & Sons. This book was released on 2016-03-21 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fish recruitment is a key process for maintaining sustainable fish populations. In the marine environment, fish recruitment is carried out in many different ways, all of which have different life history strategies. The objective of this book is to argue for greater linkages between basic and applied research on fisheries recruitment, and assessment and management of exploited fish stocks. Following an introductory chapter, this second edition of Fish Reproductive Biology is organized into 3 main sections: Biology, Population Dynamics and Recruitment Information Critical to Successful Assessment and Management Incorporation of Reproductive Biology and Recruitment Considerations into Management Advice and Strategies The authors collectively bring a wide range of diverse experience in areas of reproductive biology, fisheries oceanography, stock assessment, and management. Fully updated throughout, the book will be of great interest to a wide audience. It is useful as a textbook in graduate and undergraduate courses in fisheries biology, fisheries science, and fisheries resource management and will provide vital information for fish biologists, fisheries scientists and managers.
Download or read book Coastal Conservation written by Brooke Maslo and published by Cambridge University Press. This book was released on 2014-03-27 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: An exploration of the biodiversity status of coastal habitats worldwide, emphasising their importance to society, major threats and conservation challenges.
Download or read book Swimming with Orca written by Ingrid Visser and published by Penguin Global. This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Meet the woman whose life revolves around orca, or killer whales. This book tells the fascinating story of Dr Ingrid Visser, a marine scientist who has spent the past ten years studying these creatures. During this time she has got to know many New Zealand orca intimately; she calls them her friends and can identify some by sight. Ingrid has a hands-on approach to her study - getting into the water with them, watching them hunt and interacting in any way she can. Ingrid is the only person to work with orca in the South Pacific and has discovered many differences between their behaviour here and in the northern hemisphere. The book is packed with interesting facts about orca in New Zealand and also tells Ingrid's own personal story and the inspiring encounters she has had with these intriguing animals.
Download or read book Into Great Silence written by Eva Saulitis and published by Beacon Press. This book was released on 2013-01-15 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Science entwines with matters of the human heart as a whale researcher chronicles the lives of an endangered family of orcas Ever since Eva Saulitis began her whale research in Alaska in the 1980s, she has been drawn deeply into the lives of a single extended family of endangered orcas struggling to survive in Prince William Sound. Over the course of a decades-long career spent observing and studying these whales, and eventually coming to know them as individuals, she has, sadly, witnessed the devastation wrought by the Exxon Valdez oil spill of 1989—after which not a single calf has been born to the group. With the intellectual rigor of a scientist and the heart of a poet, Saulitis gives voice to these vital yet vanishing survivors and the place they are so loyal to. Both an elegy for one orca family and a celebration of the entire species, Into Great Silence is a moving portrait of the interconnectedness of humans with animals and place—and of the responsibility we have to protect them.
