Genetic structure of wild chinook salmon populations of Southeast Alaska and northern British Columbia

2004 ◽  
pp. 81-93
Author(s):  
Charles M. Guthrie ◽  
Richard L. Wilmot
Keyword(s):  
British Columbia ◽  
Genetic Structure ◽  
Chinook Salmon ◽  
Southeast Alaska

Geographic Variation in the Occurrence of Red- and White-Fleshed Chinook Salmon (Oncorhynchus tshawytscha) in Western North America

1989 ◽  
Vol 46 (7) ◽  
pp. 1107-1113 ◽  
Author(s):  
Jeffrey J. Hard ◽  
Alex C. Wertheimer ◽  
William F. Johnson
Keyword(s):  
British Columbia ◽  
North America ◽  
Geographic Variation ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Early Life History ◽  
Western North America ◽  
Flesh Color ◽  
Southeast Alaska ◽  
Southcentral Alaska

Flesh color, as reported by fishery processors, was surveyed in coded-wire tagged chinook salmon (Oncorhynchus tshawytscha) sampled from the 1983–85 Southeast Alaska commercial troll fisheries. Flesh color data were collected from 11 373 fish originating from 95 locations in western North America between southcentral Alaska and central California. White-fleshed chinook salmon were most common in stocks from coastal British Columbia, Southeast Alaska, and the tributaries of the Fraser River, British Columbia. Heterogeneity between neighboring locations was also greatest in this region, the most recently glaciated area of western North America. Differences in flesh color proportions are consistent with the hypothesis that chinook from the Pacific refuge colonized rivers in British Columbia and Southeast Alaska after the recession of the last Pleistocene glaciation. Genetic drift of populations founded by small numbers of parents is one explanation of the pattern of occurrence of white-fleshed chinook salmon. An alternate explanation is that geographic variation in the occurrence of red- and white-fleshed chinook salmon reflects evolutionary adaptations of these fish during early life history to local freshwater environments.

Analysis of straying variation in Alaskan hatchery chinook salmon (Oncorhynchus tshawytscha) following transplantation

1999 ◽  
Vol 56 (4) ◽  
pp. 578-589 ◽  
Author(s):  
Jeffrey J Hard ◽  
William R Heard
Keyword(s):  
British Columbia ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Release Site ◽  
Substantial Variation

In 1976 chinook salmon (Oncorhynchus tshawytscha) gametes from the Chickamin and Unuk rivers in southeastern Alaska were transplanted 250 km to establish hatchery runs at Little Port Walter (LPW), Baranof Island. From 1977 to 1989, 1 862 058 marked smolts from 12 broods were released from LPW. Homing and straying were estimated from adult recoveries at 25 locations in Alaska and British Columbia between 1981 and 1989. Of 22 198 LPW fish recovered over this period, 21 934 (98.8%) were collected at LPW. Of 264 fish recovered elsewhere, 38.3% were within 7 km of LPW; 64.4% were within 25 km of LPW. No LPW fish were recovered from the ancestral rivers, but nine fish were recovered from rivers supporting wild chinook salmon. Straying declined with distance from the release site but varied between hatcheries and streams. Straying declined with increasing age and run size. Straying was similar between the populations but varied among broods, and analysis of straying in experimental groups provided evidence for a heritable component. Males strayed more often than females. Population, gender, run size, and recovery age interacted to produce substantial variation in straying, indicating that run composition can produce complex straying responses.

Glacier Changes in Southeast Alaska and Northwest British Columbia and Contribution to Sea Level Rise

2014 ◽  
pp. 1-11
Author(s):  
Christopher F. Larsen ◽  
Roman J. Motyka ◽  
Anthony A. Arendt ◽  
Keith A. Echelmeyer ◽  
Paul E. Geissler
Keyword(s):  
British Columbia ◽  
Sea Level Rise ◽  
Sea Level ◽  
Southeast Alaska ◽  
Glacier Changes

Clones or clans: the genetic structure of a deep-sea sponge,Aphrocallistes vastus,in unique sponge reefs of British Columbia, Canada

2017 ◽  
Vol 26 (4) ◽  
pp. 1045-1059 ◽  
Author(s):  
Rachel R. Brown ◽  
Corey S. Davis ◽  
Sally P. Leys
Keyword(s):  
British Columbia ◽  
Genetic Structure ◽  
Deep Sea ◽  
Sponge Reefs

Proliferative kidney disease and Sphaerospora oncorhynchi in wild-caught salmonids from the Puntledge River system, Vancouver Island, British Columbia

1995 ◽  
Vol 52 (S1) ◽  
pp. 13-17 ◽  
Author(s):  
M.L. Kent ◽  
M. Higgins ◽  
D.J. Whitaker ◽  
H. Yokoyama
Keyword(s):  
British Columbia ◽  
Kidney Disease ◽  
Chinook Salmon ◽  
Sockeye Salmon ◽  
Natural Infection ◽  
Vancouver Island ◽  
Renal Tubules ◽  
Kokanee Salmon ◽  
Proliferative Kidney Disease ◽  
Sexually Mature

Proliferative kidney disease (PKD), caused by the PKX myxosporean, was observed in kokanee salmon (non-anadromous sockeye salmon) (Oncorhynchus nerka) and chinook salmon (O. tshawytscha) collected from the Puntledge River, Vancouver Island, British Columbia in July 1993. This is the first report of a natural infection of PKX in either captive or wild sockeye salmon. All 14 underyearling kokanee salmon and the one underyearling chinook salmon exhibited numerous PKX organisms and associated chronic inflammation in the renal interstitium. Thirty-eight percent of sexually mature kokanee salmon collected in the autumn of 1993 from Comox Lake (which drains into the Puntledge River) were infected with Sphaerospora oncorhynchi, Kent, Whitaker and Margolis, 1993 in the renal tubules, while immature cutthroat trout (O. clarki) and coho salmon (O. kisutch) from the same collection did not exhibit myxosporean spores in the kidney. The kidneys of threespine stickleback (Gasterosteus aculeatus) and prickly sculpin (Cottus asper) collected from the Puntledge River during the summer were all infected with a Myxobilatus sp., but no organisms suggestive of PKX or Sphaerospora were observed. This study further supports the hypothesis that PKX is a developmental stage of S. oncorhynchi, which may sporulate only in sexually mature salmonids.

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