Coho Smolt Coded-wire Tagging and Enumeration (1971 to 1973 Broods) on Three Small Tributaries in the Squamish River System PDF Download
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Author: A. W. Argue
Publisher:
ISBN:
Category : Coho salmon
Languages : en
Pages : 96
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Book Description
Author: A. W. Argue
Publisher:
ISBN:
Category : Coho salmon
Languages : en
Pages : 96
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Book Description
Author: Laurie Ann Weitkamp
Publisher:
ISBN:
Category : Coho salmon
Languages : en
Pages : 440
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Book Description
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 274
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Book Description
Author: A. W. Argue
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 118
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Book Description
The chinook (Oncorhynchus tshawytscha) and coho (O. kisutch) salmon fishery in the Strait of Georgia, between Vancouver Island and the mainland of British Columbia, is a valuble sport and commercial resource. In an effort to evaluate proposed regulations on sport and commercial fishermen (season closures, size limits, bag limits, etc.), a computer simulation model was developed. The model calculates the abundance and size of the natural and enhanced stocks of chinook and coho for each age-class and evaluates regulatory options by simulating the life history of these fish in half-monthly intervals. Cohorts enter the model as smolts and are followed through natural mortality, emigration out of the Strait of Georgia, fishing mortality, shaking mortality, maturation, and spawning. The major effect of any regulation that reduces catch to one user increases the catch to other users of the resource. Any attempt to increase spawning escapement without regulation of several users simultaneously is destined to failure, and even quite harsh regulations do not double the critical chinook escapement. Finally, it is found that "enhancement" of chinook and coho will lead to a more rapid decline of natural stocks unless regulations are found to reduce overall exploitation rates on these stocks.
Author:
Publisher:
ISBN:
Category : Aquatic biology
Languages : en
Pages : 132
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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 36
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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 112
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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 50
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Book Description
Author: Mark Hume
Publisher: Greystone Books
ISBN: 9781550547481
Category : Nature
Languages : en
Pages : 192
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Book Description
Winner of the Roderick-Haig Brown Prize. The Bella Coola River, now closed to steelhead fishing because the stocks are endangered, is a magnificent sight. Flowing through the stunning richness of British Columbia's temperate rain forest, the Bella Coola River is one of the worldÌs celebrated fishing streams. In this poetic and powerful book, Mark Hume describes a year in the life of the river as he fly-fishes for the fairylike whitefish, the legendary bull trout, the spirited cutthroat or the elusive steelhead. Along the way he describes the incredible beauty and fecundity of the valley ecosystem through the seasons, examines what has happened to that increasingly endangered ecosystem and its inhabitants in recent times, and encounters other anglers, old-timers who have fished the river for decades, and an abundance of wildlife. In January, Hume portrays the deep winter, when wood frogs, beetles and butterfly larvae may become frozen alive, when the snow on the mountains is stacked in steeples and when it is often too cold to fish. In June, when the river is discoloured by glacial silt and the rapids between pools deepen, he observes a clot of men fishing, their spinning rods propped on the river bank while they drink coffee, and wages a dramatic battle with a chinook salmon. And in October, he witnesses the miracle of salmon spawning, draws an intriguing parallel between commercial hunting and commercial fishing, meets a buck with tattered velvet hanging from one horn, and catches and releases a spectacular steelhead. Also available in hardcover.
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9789251046944
Category : Business & Economics
Languages : en
Pages : 180
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Book Description
The importance of free longitudinal passage of river fauna is stressed.
