scholarly journals The Natural Regulation and Relevance of Wild and Hatchery Coho Salmon Production in the Strait of Georgia

Fisheries ◽  
2021 ◽  
Author(s):  
Richard Beamish ◽  
Chrys Neville
Keyword(s):  
Coho Salmon ◽  
Strait Of Georgia ◽  
Natural Regulation ◽  
Salmon Production

Estimating the Abundance of Juvenile Coho Salmon in the Strait of Georgia by Means of Surface Trawls

2000 ◽  
Vol 20 (2) ◽  
pp. 369-375 ◽  
Author(s):  
R. J. Beamish ◽  
D. McCaughran ◽  
J. R. King ◽  
R. M. Sweeting ◽  
G. A. McFarlane
Keyword(s):  
Coho Salmon ◽  
Strait Of Georgia

Challenges for Diadromous Fishes in a Dynamic Global Environment

2009 ◽  
Keyword(s):  
Chinook Salmon ◽  
Large Scale ◽  
Coho Salmon ◽  
Pacific Salmon ◽  
Pink Salmon ◽  
Commercial Catch ◽  
Atmospheric Processes ◽  
Energy Transfers ◽  
Salmon Production ◽  
The Impact

<em>Abstract</em>.-Pacific salmon <em>Oncorhynchus </em>spp. catches are at historic high levels. It is significant that one of the world's major fisheries for a group of species that dominates the surface waters of the subarctic Pacific is actually very healthy. Natural trends in climate are now recognized to cause large fluctuations in Pacific salmon production, as shown in historical records of catch and recent changes probably have been affected by greenhouse gas induced climate changes. Pink salmon <em>O. gorbuscha </em>and chum salmon <em>O. keta </em>production and catch has increased in the past 30 years and may continue in a similar trend for for the next few decades. Coho salmon <em>O. kisutch </em>and Chinook salmon <em>O. tshawytscha </em>catches have been declining for several decades, particularly at the southern end of their range, and they may continue to decline. In the 1970s, hatcheries were considered to be a method of adding to the wild production of coho and Chinook salmon because the ocean capacity to produce these species was assumed to be underutilized. Large-scale changes in Pacific salmon abundances are linked to changes in large-scale atmospheric processes. These large-scale atmospheric processes are also linked to planetary energy transfers, and there is a decadal scale pattern to these relationships. Pacific salmon production in general is higher in decades of intense Aleutian lows than in periods of weak Aleutian lows. Key to understanding the impact of climate change on Pacific salmon is understanding how the Aleutian low will change. Chinook and coho salmon are minor species in the total commercial catch, but important socially and economically in North America. A wise use of hatcheries may be needed to maintain abundances of these species in future decades.

Variation in Body Morphology Among British Columbia Populations of Coho Salmon, Oncorhynchus kisutch

1985 ◽  
Vol 42 (12) ◽  
pp. 2020-2028 ◽  
Author(s):  
Eric B. Taylor ◽  
J. D. McPhail
Keyword(s):  
British Columbia ◽  
Coho Salmon ◽  
Function Analysis ◽  
Oncorhynchus Kisutch ◽  
Fraser River ◽  
Strait Of Georgia ◽  
Coastal Streams ◽  
Morphological Differences ◽  
Median Fins ◽  
Coastal British Columbia

Ten populations of juvenile coho salmon, Oncorhynchus kisutch, from streams tributary to the upper Fraser River, the lower Fraser River, and the Strait of Georgia region were morphologically compared. Juveniles from coastal streams (Fraser River below Hell's Gate and the Strait of Georgia) were more robust (deeper bodies and caudal peduncles, shorter heads, and larger median fins) than interior Juveniles. Discriminant function analysis indicated that juvenile coho could be identified as to river of origin with 71% accuracy. Juvenile coho from coastal streams were less successfully classified as to stream of origin; however, juveniles could be successfully identified as either coastal or interior with 93% accuracy. Juvenile coho from north coastal British Columbia, Alaska, and the upper Columbia system also fitted this coastal and interior grouping. This suggests that a coastwide coastal–interior dichotomy in juvenile body form exists. Three populations (one interior and two coastal) were studied in more detail. In these populations the coastal versus interior morphology was consistent over successive years, and was also displayed in individuals reared from eggs in the laboratory. Adult coho salmon also showed some of the coastal–interior morphological differences exhibited by juveniles. We concluded that the morphological differences between coastal and interior coho salmon are at least partially inherited.

The Use of Acoustic Tags to Determine the Timing and Location of the Juvenile Coho Salmon Migration out of the Strait of Georgia, Canada

2009 ◽  
Vol 138 (6) ◽  
pp. 1220-1225 ◽  
Author(s):  
C. M. Chittenden ◽  
R. J. Beamish ◽  
C. M. Neville ◽  
R. M. Sweeting ◽  
R. S. McKinley
Keyword(s):  
Coho Salmon ◽  
Strait Of Georgia ◽  
Acoustic Tags

Changes in the Population Ecology of Hatchery and Wild Coho Salmon in the Strait of Georgia

2008 ◽  
Vol 137 (2) ◽  
pp. 503-520 ◽  
Author(s):  
R. J. Beamish ◽  
R. M. Sweeting ◽  
K. L. Lange ◽  
C. M. Neville
Keyword(s):  
Population Ecology ◽  
Coho Salmon ◽  
Strait Of Georgia

scholarly journals Effects of smolt release timing and size on the survival of hatchery-origin coho salmon in the Strait of Georgia

2013 ◽  
Vol 115 ◽  
pp. 111-118 ◽  
Author(s):  
J.R. Irvine ◽  
M. O’Neill ◽  
L. Godbout ◽  
J. Schnute
Keyword(s):  
Coho Salmon ◽  
Strait Of Georgia ◽  
Release Timing
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