Salmon Life Histories And Fisheries Management

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Salmon Life Histories and Fisheries Management

Author : Lukas B. DeFilippo
Publisher :
ISBN 13 :
Total Pages : 168 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Salmon Life Histories and Fisheries Management by : Lukas B. DeFilippo

Download or read book Salmon Life Histories and Fisheries Management written by Lukas B. DeFilippo and published by . This book was released on 2020 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the life histories of exploited aquatic taxa is important to sustainable fisheries management. Life history diversity has been shown to stabilize population dynamics through 'portfolio effects' which can maintain robust fishery yields despite environmental variability. Moreover, the reproductive life histories of fishes can be important to shaping management-relevant properties such as the steepness of the stock-recruit relationship, genetic diversity, age and size structure, and stock rebuilding potential. Despite the importance of life history information to conservation and management, achieving a practical understanding of the evolutionary and ecological factors that maintain particular life histories can be challenging. This difficulty is exemplified by widespread declines in size-and-age-at-maturity of many commercially valuable fish stocks, the causes of which are seldom be reliably discerned. In this dissertation, I seek to better understand the factors that control the frequencies of alternative maturation and reproductive life histories in sockeye salmon (Oncorhynchus nerka) populations. In chapter 1, I used Bayesian hierarchical modelling to identify the basis of variation in early maturation rates among sockeye salmon populations in Bristol Bay, Alaska. In my second chapter, I developed an age-structured Bayesian state space model to assess the causes of elevated early maturation rates in Kodiak sockeye salmon. Finally, in my third chapter I developed an individual-based population dynamics framework to explore the ecological and evolutionary factors that regulate frequencies of alternative maturation and reproductive life histories in age-structured populations. Collectively, my results demonstrate that the maintenance of alternative life histories within populations may be more complex than existing evolutionary frameworks suggest, and reveal a novel role of population dynamics in the evolution and maintenance of complex mating systems.

Pacific Salmon Life Histories

Author : Cornelis Groot
Publisher : UBC Press
ISBN 13 : 9780774803595
Total Pages : 602 pages
Book Rating : 4.8/5 (35 download)

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Book Synopsis Pacific Salmon Life Histories by : Cornelis Groot

Download or read book Pacific Salmon Life Histories written by Cornelis Groot and published by UBC Press. This book was released on 1991 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pacific salmon are an important biological and economic resource of countries of the North Pacific rim. They are also a unique group of fish possessing unusually complex life histories. There are seven species of Pacific salmon, five occurring on both the North American and Asian continents (sockeye, pink, chum, chinook, and coho) and two (masu and amago) only in Asia. The life cycle of the Pacific salmon begins in the autumn when the adult female deposits eggs that are fertilized in gravel beds in rivers or lakes. The young emerge from the gravel the following spring and will either migrate immediately to salt water or spend one or more years in a river or lake before migrating. Migrations in the ocean are extensive during the feeding and growing phase, covering thousands of kilometres. After one or more years the maturing adults find their way back to their home river, returning to their ancestral breeding grounds to spawn. They die after spawning and the eggs in the gravel signify a new cycle. Upon this theme Pacific salmon have developed many variations, both between as well as within species. Pacific Salmon Life Histories provides detailed descriptions of the different life phases through which each of the seven species passes. Each chapter is written by a scientist who has spent years studying and observing a particular species of salmon. Some of the topics covered are geographic distribution, transplants, freshwater life, ocean life, development, growth, feeding, diet, migration, and spawning behaviour. The text is richly supplemented by numerous maps, illustrations, colour plates, and tables and there is a detailed general index, as well as a useful geographical index.

Fishes of the Last Frontier

Author : Bill Hauser
Publisher : Publication Consultants
ISBN 13 : 1594335230
Total Pages : 251 pages
Book Rating : 4.5/5 (943 download)

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Book Synopsis Fishes of the Last Frontier by : Bill Hauser

Download or read book Fishes of the Last Frontier written by Bill Hauser and published by Publication Consultants. This book was released on 2014-11-12 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fishes of the Last Frontier answers many of your fish questions and others you haven't even thought of yet in a nontechnical, plain talk voice. Learn about the fishes that are of value or special interest to Alaskans: how fish are able to survive and grow, how they get along with each other--or not--and what they eat, where and how our Alaska fishes spawn, the difference between a red and a redd, and the difference between anadromous and catadromous and why that is important. The author, a fishery scientist with nearly 50 years of experience and training, including more than 30 years in Alaska, describes the life history characteristics of 43 species of fishes valuable or important in some way to Alaskans. He delves into various aspects of biology and ecology of fish and provides insight into how humans and fish interact. The processes of fishery management in Alaska are described. Fishes of the Last Frontier includes fishes from throughout Alaska in fresh, brackish, and marine waters and sport, commercial, and subsistence fisheries. Learn not just how anadromous fish find their way home but also how scientists were able to learn the details. Nontechnical readers have reported the presentations as enjoyable, understandable, and informative.

Pacific Salmon Management

Author :
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.3/5 (121 download)

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Book Synopsis Pacific Salmon Management by :

Download or read book Pacific Salmon Management written by and published by . This book was released on 1991 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Sustainable Fisheries Management

Author : E. Eric Knudsen
Publisher : CRC Press
ISBN 13 : 0429526369
Total Pages : 706 pages
Book Rating : 4.4/5 (295 download)

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Book Synopsis Sustainable Fisheries Management by : E. Eric Knudsen

Download or read book Sustainable Fisheries Management written by E. Eric Knudsen and published by CRC Press. This book was released on 2020-02-10 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt: What has happened to the salmon resource in the Pacific Northwest? Who is responsible and what can be done to reverse the decline in salmon populations? The responsibly falls on everyone involved - fishermen, resource managers and concerned citizens alike - to take the steps necessary to ensure that salmon populations make a full recovery. T

Ecology of Atlantic Salmon and Brown Trout

Author : Bror Jonsson
Publisher : Springer Science & Business Media
ISBN 13 : 9400711891
Total Pages : 720 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Ecology of Atlantic Salmon and Brown Trout by : Bror Jonsson

Download or read book Ecology of Atlantic Salmon and Brown Trout written by Bror Jonsson and published by Springer Science & Business Media. This book was released on 2011-05-03 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Destruction of habitat is the major cause for loss of biodiversity including variation in life history and habitat ecology. Each species and population adapts to its environment, adaptations visible in morphology, ecology, behaviour, physiology and genetics. Here, the authors present the population ecology of Atlantic salmon and brown trout and how it is influenced by the environment in terms of growth, migration, spawning and recruitment. Salmonids appeared as freshwater fish some 50 million years ago. Atlantic salmon and brown trout evolved in the Atlantic basin, Atlantic salmon in North America and Europe, brown trout in Europe, Northern Africa and Western Asia. The species live in small streams as well as large rivers, lakes, estuaries, coastal seas and oceans, with brown trout better adapted to small streams and less well adapted to feeding in the ocean than Atlantic salmon. Smolt and adult sizes and longevity are constrained by habitat conditions of populations spawning in small streams. Feeding, wintering and spawning opportunities influence migratory versus resident lifestyles, while the growth rate influences egg size and number, age at maturity, reproductive success and longevity. Further, early experiences influence later performance. For instance, juvenile behaviour influences adult homing, competition for spawning habitat, partner finding and predator avoidance. The abundance of wild Atlantic salmon populations has declined in recent years; climate change and escaped farmed salmon are major threats. The climate influences through changes in temperature and flow, while escaped farmed salmon do so through ecological competition, interbreeding and the spreading of contagious diseases. The authors pinpoint essential problems and offer suggestions as to how they can be reduced. In this context, population enhancement, habitat restoration and management are also discussed. The text closes with a presentation of what the authors view as major scientific challenges in ecological research on these species.

Atlantic Salmon in Maine

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309166586
Total Pages : 304 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Atlantic Salmon in Maine by : National Research Council

Download or read book Atlantic Salmon in Maine written by National Research Council and published by National Academies Press. This book was released on 2004-09-07 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of the pervasive and substantial decline of Atlantic salmon populations in Maine over the past 150 years, and because they are close to extinction, a comprehensive statewide action should be taken now to ensure their survival. The populations of Atlantic salmon have declined drastically, from an estimated half million adult salmon returning to U.S. rivers each year in the early 1800s to perhaps as few as 1,000 in 2001. The report recommends implementing a formalized decision-making approach to establish priorities, evaluate options and coordinate plans for conserving and restoring the salmon.

Something Spectacular

Author : Howard A. Tanner
Publisher : MSU Press
ISBN 13 : 1628953470
Total Pages : 242 pages
Book Rating : 4.6/5 (289 download)

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Book Synopsis Something Spectacular by : Howard A. Tanner

Download or read book Something Spectacular written by Howard A. Tanner and published by MSU Press. This book was released on 2018-12-01 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the new chief of the Michigan Department of Conservation’s Fish Division in 1964, Howard A. Tanner was challenged to “do something . . . spectacular.” He met that challenge by leading the successful introduction of coho salmon into the Michigan waters of the Great Lakes. This volume illustrates how Tanner was able to accomplish this feat: from a detailed account of his personal and professional background that provided a foundation for success; the historical and contemporary context in which the Fish Division undertook this bold step to reorient the state’s fishery from commercial to sport; the challenges, such as resistance from existing government institutions and finding funding, that he and his colleagues faced; the risks they took by introducing a nonnative species; the surprises they experienced in the first season’s catch; to, finally, the success they achieved in establishing a world-renowned, biologically and financially beneficial sport fishery in the Great Lakes. Tanner provides an engaging history of successfully introducing Pacific salmon into the lakes from the perspective of an ultimate insider.

Making Salmon

Author : Joseph E. Taylor
Publisher : University of Washington Press
ISBN 13 : 9780295981147
Total Pages : 460 pages
Book Rating : 4.9/5 (811 download)

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Book Synopsis Making Salmon by : Joseph E. Taylor

Download or read book Making Salmon written by Joseph E. Taylor and published by University of Washington Press. This book was released on 1999 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Making Salmon is of critical importance for everyone interested in understanding the origins of and finding a solution for the current environmental crisis in the Pacific Northwest."--BOOK JACKET.

Habitat Suitability Index Models

Author : Jon G. Stanley
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.3/5 ( download)

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Book Synopsis Habitat Suitability Index Models by : Jon G. Stanley

Download or read book Habitat Suitability Index Models written by Jon G. Stanley and published by . This book was released on 1995 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Model was developed by evaluating individual suitability indices of 17 environmental variables that have been shown to afffect productivity or survival of nonmigratory freshwater life history stages of Atlantic salmon (Salmo salar L.).

The Behavior and Ecology of Pacific Salmon and Trout

Author : Thomas P. Quinn
Publisher : UBC Press
ISBN 13 : 0774842431
Total Pages : 392 pages
Book Rating : 4.7/5 (748 download)

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Book Synopsis The Behavior and Ecology of Pacific Salmon and Trout by : Thomas P. Quinn

Download or read book The Behavior and Ecology of Pacific Salmon and Trout written by Thomas P. Quinn and published by UBC Press. This book was released on 2011-11-01 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Behavior and Ecology of Pacific Salmon and Trout explains the patterns of mate choice, the competition for nest sites, and the fate of the salmon after their death. It describes the lives of offspring during the months they spend incubating in gravel, growing in fresh water, and migrating out to sea to mature. This thorough, up-to-date survey should be on the shelf of everyone with a professional or personal interest in Pacific salmon and trout. Written in a technically accurate but engaging style, it will appeal to a wide range of readers, including students, anglers, biologists, conservationists, legislators, and armchair naturalists.

Species Profiles

Author : Thomas J. Hassler
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (359 download)

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Book Synopsis Species Profiles by : Thomas J. Hassler

Download or read book Species Profiles written by Thomas J. Hassler and published by . This book was released on 1987 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Pacific Salmon Environmental and Life History Models

Author : E. Eric Knudsen
Publisher :
ISBN 13 :
Total Pages : 480 pages
Book Rating : 4.:/5 (891 download)

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Book Synopsis Pacific Salmon Environmental and Life History Models by : E. Eric Knudsen

Download or read book Pacific Salmon Environmental and Life History Models written by E. Eric Knudsen and published by . This book was released on 2009 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Ocean Ecology of Pacific Salmon and Trout

Author :
Publisher :
ISBN 13 : 9781934874455
Total Pages : pages
Book Rating : 4.8/5 (744 download)

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Book Synopsis The Ocean Ecology of Pacific Salmon and Trout by :

Download or read book The Ocean Ecology of Pacific Salmon and Trout written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Managing the Columbia River

Author : National Research Council (U.S.). Committee on Water Resources Management, Instream Flows, and Salmon Survival in the Columbia River Basin
Publisher : National Academy Press
ISBN 13 :
Total Pages : 274 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Managing the Columbia River by : National Research Council (U.S.). Committee on Water Resources Management, Instream Flows, and Salmon Survival in the Columbia River Basin

Download or read book Managing the Columbia River written by National Research Council (U.S.). Committee on Water Resources Management, Instream Flows, and Salmon Survival in the Columbia River Basin and published by National Academy Press. This book was released on 2004 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Book News, Inc., Portland, OR (booknews.com).

Salmon, People, and Place

Author : Jim Lichatowich
Publisher :
ISBN 13 :
Total Pages : 260 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Salmon, People, and Place by : Jim Lichatowich

Download or read book Salmon, People, and Place written by Jim Lichatowich and published by . This book was released on 2013 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Each year wild Pacific salmon leave their oceanic feeding grounds and swim hundreds of miles back to their home rivers. The salmon's annual return is a place-defining event in the Pacific Northwest, with immense ecological, economic, and social significance. However, despite massive spending, efforts to significantly alter the endangered status of salmon have failed. In Salmon, People, and Place, acclaimed fisheries biologist Jim Lichatowich eloquently exposes the misconceptions underlying salmon management and recovery programs that have fueled the catastrophic decline in Northwest salmon populations for more than a century. These programs will continue to fail, he suggests, so long as they regard salmon as products and ignore their essential relationship with their habitat. But Lichatowich offers hope. In Salmon, People, and Place he presents a concrete plan for salmon recovery, one based on the myriad lessons learned from past mistakes. What is needed to successfully restore salmon, Lichatowich states, is an acute commitment to healing the relationships among salmon, people, and place. A significant contribution to the literature on Pacific salmon, Salmon, People, and Place: A Biologist's Search for Salmon Recovery is an essential read for anyone concerned about the fate of this Pacific Northwest icon.

Salmon Without Rivers

Author : Jim Lichatowich
Publisher :
ISBN 13 :
Total Pages : 346 pages
Book Rating : 4.3/5 (5 download)

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Book Synopsis Salmon Without Rivers by : Jim Lichatowich

Download or read book Salmon Without Rivers written by Jim Lichatowich and published by . This book was released on 1999-08 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Fundamentally, the salmon's decline has been the consequence of a vision based on flawed assumptions and unchallenged myths.... We assumed we could control the biological productivity of salmon and 'improve' upon natural processes that we didn't even try to understand. We assumed we could have salmon without rivers." --from the introduction From a mountain top where an eagle carries a salmon carcass to feed its young to the distant oceanic waters of the California current and the Alaskan Gyre, salmon have penetrated the Northwest to an extent unmatched by any other animal. Since the turn of the twentieth century, the natural productivity of salmon in Oregon, Washington, California, and Idaho has declined by eighty percent. The decline of Pacific salmon to the brink of extinction is a clear sign of serious problems in the region. In Salmon Without Rivers, fisheries biologist Jim Lichatowich offers an eye-opening look at the roots and evolution of the salmon crisis in the Pacific Northwest. He describes the multitude of factors over the past century and a half that have led to the salmon's decline, and examines in depth the abject failure of restoration efforts that have focused almost exclusively on hatcheries to return salmon stocks to healthy levels without addressing the underlying causes of the decline. The book: describes the evolutionary history of the salmon along with the geologic history of the Pacific Northwest over the past 40 million years considers the indigenous cultures of the region, and the emergence of salmon-based economies that survived for thousands of years examines the rapid transformation of the region following the arrival of Europeans presents the history of efforts to protect and restore the salmon offers a critical assessment of why restoration efforts have failed Throughout, Lichatowich argues that the dominant worldview of our society -- a worldview that denies connections between humans and the natural world -- has created the conflict and controversy that characterize the recent history of salmon; unless that worldview is challenged and changed, there is little hope for recovery. Salmon Without Rivers exposes the myths that have guided recent human-salmon interactions. It clearly explains the difficult choices facing the citizens of the region, and provides unique insight into one of the most tragic chapters in our nation's environmental history.