The Life History Of The Canadian Salmon
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Author | : Cornelis Groot |
Publisher | : UBC Press |
Total Pages | : 602 |
Release | : 1991 |
Genre | : Nature |
ISBN | : 9780774803595 |
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.
Author | : Frank Gray Griswold |
Publisher | : |
Total Pages | : 124 |
Release | : 1929 |
Genre | : Salmon |
ISBN | : |
Author | : National Research Council |
Publisher | : National Academies Press |
Total Pages | : 304 |
Release | : 2004-09-07 |
Genre | : Technology & Engineering |
ISBN | : 0309166586 |
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.
Author | : Frank Walter Weymouth |
Publisher | : |
Total Pages | : 922 |
Release | : 1933 |
Genre | : Shrimps |
ISBN | : |
Author | : Frank Gray Griswold |
Publisher | : |
Total Pages | : 224 |
Release | : 1930 |
Genre | : Atlantic salmon |
ISBN | : |
Author | : R.C. Chambers |
Publisher | : Springer Science & Business Media |
Total Pages | : 638 |
Release | : 1997-07-31 |
Genre | : Science |
ISBN | : 9780412641909 |
Many of the processes influencing recruitment to an adult fish population or entry into a fishery occur very early in life. The variations in life histories and behaviours of young fish and the selective processes operating on this variation ultimately determine the identities and abundance of survivors. This important volume brings together contributions from many of the world's leading researchers from the field of fish ecology. The book focuses on three major themes of pressing importance in the analysis of the role that the early life history of fishes plays in the number and quality of recruits: the selective processes at play in their early life history; the contributions of early life history to the understanding of recruitment.
Author | : Thomas P. Quinn |
Publisher | : UBC Press |
Total Pages | : 392 |
Release | : 2011-11-01 |
Genre | : Nature |
ISBN | : 0774842431 |
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.
Author | : Mark Kurlansky |
Publisher | : |
Total Pages | : 336 |
Release | : 2021-10-07 |
Genre | : |
ISBN | : 9780861541256 |
The internationally bestselling author says if we can save the salmon, we can save the world
Author | : R.C. Chambers |
Publisher | : Springer Science & Business Media |
Total Pages | : 616 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 9400914393 |
Many of the processes influencing recruitment to an adult fish population or entry into a fishery occur very early in life. The variations in life histories and behaviours of young fish and the selective processes operating on this variation ultimately determine the identities and abundance of survivors. This important volume brings together contributions from many of the world's leading researchers from the field of fish ecology. The book focuses on three major themes of pressing importance in the analysis of the role that the early life history of fishes plays in the number and quality of recruits: the selective processes at play in their early life history; the contributions of early life history to the understanding of recruitment.
Author | : Adam Weymouth |
Publisher | : Penguin Group |
Total Pages | : 0 |
Release | : 2019 |
Genre | : Nature |
ISBN | : 9780141983790 |
"The Yukon River is 2,000 miles long and the longest stretch of free-flowing river in the United States. In this riveting examination of one of the last wild places on earth, Adam Weymouth canoes from Canada's Yukon Territory, through Alaska, to the Bering Sea. The result is a book that shows how even the most remote wilderness is affected by the same forces reshaping the rest of the planet. Every summer, hundreds of thousands of king salmon migrate the distance of the Yukon to their spawning grounds, where they breed and die, in what is the longest salmon run in the world. For the people who live along the river, salmon were once the lifeblood of commerce and local culture. But climate change and globalized economy have fundamentally altered the balance between people and nature; the health and numbers of king salmon are in question, as is the fate of the communities that depend on them. Traveling down the Yukon as the salmon migrate, a four-month journey through untrammeled landscape, Weymouth traces the fundamental interconnectedness of people and fish through searing and unforgettable portraits of the individuals he encounters. He offers a powerful, nuanced glimpse into indigenous cultures, and into our ever-complicated relationship with the natural world. Weaving in the rich history of salmon across time as well as the science behind their mysterious life cycle, 'Kings of the Yukon' is extraordinary adventure and nature writing at its most urgent and poetic"--Dust jacket.