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Book Early Marine Growth of Juvenile Pacific Salmon in the Strait of Georgie and Soanich Inlet British Columbia

Download or read book Early Marine Growth of Juvenile Pacific Salmon in the Strait of Georgie and Soanich Inlet British Columbia written by Canada. Fisheries and Environment Canada and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book M moire concernant la province de Languedoc

Download or read book M moire concernant la province de Languedoc written by and published by . This book was released on 1698 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Distribution Abundance and Feeding Habits of Juvenile Pacific Salmon in Georgia Strait British Columbia

Download or read book The Distribution Abundance and Feeding Habits of Juvenile Pacific Salmon in Georgia Strait British Columbia written by Canada. Department of Fisheries and the Environment. Fisheries and Marine Service and published by . This book was released on 1977 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Review of the Research on the Early Marine Period of Pacific Salmon by Canada Japan Russia and the United States

Download or read book A Review of the Research on the Early Marine Period of Pacific Salmon by Canada Japan Russia and the United States written by Philip E. K. Symons and published by . This book was released on 2003 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reports in this Bulletin summarize the studies of the early marine period of the life history of juvenile Pacific salmon. Review paper included: 1) A history of the research on the early marine life of Pacific salmon off Canada's Pacific coast; 2) Japanese studies on the early ocean life of juvenile salmon; 3) Review of Russian marine investigations of juvenile Pacific salmon; 4) Research conducted by the United States on the early ocean life of Pacific salmon.

Book Progress Report International Pacific Salmon Fisheries Commission

Download or read book Progress Report International Pacific Salmon Fisheries Commission written by International Pacific Salmon Fisheries Commission and published by . This book was released on 1960 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Age at Maturity of the Pacific Coast Salmon of the Genus Oncorhynchus

Download or read book Age at Maturity of the Pacific Coast Salmon of the Genus Oncorhynchus written by Charles Henry Gilbert and published by . This book was released on 1913 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Distribution of Juvenile Salmon in the Southern Strait of Georgia During the Period April to July 1966 1969

Download or read book Distribution of Juvenile Salmon in the Southern Strait of Georgia During the Period April to July 1966 1969 written by Canada. Department of Fisheries and the Environment. Fisheries and Marine Service and published by . This book was released on 1978 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Distribution of Juvenile Salmon in the Southern Strait of Georgia During the Period April to July 1966 1969

Download or read book Distribution of Juvenile Salmon in the Southern Strait of Georgia During the Period April to July 1966 1969 written by Canada. Fisheries and Marine Ser and published by . This book was released on 1978 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Juvenile Pacific Salmon Survey in the Strait of Georgia and Associated Waters July 8 27 2007

Download or read book Juvenile Pacific Salmon Survey in the Strait of Georgia and Associated Waters July 8 27 2007 written by C. M. Neville and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A trawl survey to examine the distribution, abundance and ecology of juvenile Pacific salmon (Oncorhynchus spp.) in the Strait of Georgia and associated waters was conducted July 8-27, 2007 as one of the annual surveys that occurred in June-July and in September-October each year since 1998. In July 2007, the survey covered the Strait of Georgia region and was consistent with the standard surveys that had been conducted between 1998 and 2006. Additional sampling was conducted in Queen Charlotte Strait, Johnstone Strait, Bute Inlet, Desolation Sound, Puget Sound (United States) and Juan de Fuca Strait. In addition to providing the catch information from the survey, this report provides a brief history of the surveys, the survey design and the intent of the surveys in understanding the early marine ecology of Pacific salmon in the Strait of Georgia"--Abstract, page viii.

Book Factors Influencing the Early Marine Ecology of Juvenile Sockeye Salmon O Nerka in Rivers Inlet British Columbia

Download or read book Factors Influencing the Early Marine Ecology of Juvenile Sockeye Salmon O Nerka in Rivers Inlet British Columbia written by Seana Leigh Buchanan and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Rivers Inlet sockeye salmon (Oncorhynchus nerka) population was historically the third most numerous in British Columbia, with returns routinely exceeding one million adults. In recent years, the population has drastically declined, culminating in an utter failure of the adult spawning population in 1999, when returns were estimated at 3600 fish. Poor marine survival has been proposed as the primary cause of the decline. Existing evidence, including concurrent declines in sockeye salmon populations from nearby watersheds indicate the problem may lie in the early marine phase. We provide evidence suggesting that a crucial, population-limiting window may exist in the early marine phase, as the newly smolted juvenile sockeye salmon emerge into Rivers Inlet and nearby waters. Unless appropriate abiotic conditions exist in the lead-up to the juvenile migration, the brood year may suffer significant mortality. This, I propose, is a key contributor to reduced returns of Rivers Inlet sockeye salmon.

Book Pacific Salmon Life Histories

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.

Book Factors Affecting Overwinter Mortality and Early Marine Growth in the First Ocean Year of Juvenile Chinook Salmon in Quatsino Sound British Columbia

Download or read book Factors Affecting Overwinter Mortality and Early Marine Growth in the First Ocean Year of Juvenile Chinook Salmon in Quatsino Sound British Columbia written by Katherine Rose Middleton and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Evidence suggests that the variability in recruitment of adult Pacific salmon is related to smolt survival during the first ocean year. Specifically, the first few weeks and first marine winter may be two critical periods of high mortality during early marine life. Mortality during early marine residency has been attributed to predation and size-dependent factors while high mortality during the first winter may be due to energy deficits and failure to reach a certain size by the end of the growing season. My study assessed factors influencing overwinter mortality and early marine growth in juvenile Chinook salmon (Oncorhynchus tshawytscha) from Marble River, Quatsino Sound, British Columbia. Juvenile salmon were collected during November 2005 and 2006 (fall) and March 2006 and 2007(winter). Mortality rates over the first winter derived from catch per unit effort across seasons ranged between 80-90% in all years. These are the first estimations of overwinter mortality in juvenile Pacific salmon. Fish size distributions showed no evidence of size-selective overwinter mortality between fall and winter fish in either 2005-2006 or 2006-2007. Otolith microstructure analyses showed no significant difference in circulus increment widths during the first four weeks after marine entry. Similarities in increment width indicated that early marine growth did not differ between fall and winter fish during early marine residency in 2006. These observations show that the high overwinter mortality rates of juvenile Chinook salmon in Quatsino Sound are not size-dependent. Total plankton biomass was significantly lower in the winter season but size distribution, gut fullness and energy density data did not show evidence of starvation. No correlation was found between early marine growth, size, energy accumulation and high mortality in Marble River juvenile Chinook salmon during their first ocean winter in Quatsino Sound. Possible factors influencing these high mortality rates may include non size-selective predation, disease, local environmental influences or an as yet unknown source. Future work should continue to focus on understanding the relationship between early marine survival and adult recruitment. The expansion of growth comparisons geographically and chronologically while determining the effects of predatory mortality on juvenile Chinook salmon along the north Pacific continental shelf and beyond are imperative to fully understanding this complex marine life stage.