Population structure of lake-type and river-type sockeye salmon in transboundary rivers of northern British Columbia

2004 ◽  
Vol 65 (2) ◽  
pp. 389-402 ◽  
Author(s):  
T. D. Beacham ◽  
B. McIntosh ◽  
C. MacConnachie
Keyword(s):  
British Columbia ◽  
Population Structure ◽  
Sockeye Salmon ◽  
Transboundary Rivers ◽  
Lake Type ◽  
River Type

Physiological and Growth Differences in Three Stocks of Underyearling Sockeye Salmon (Oncorhynchus nerka) on Early Entry into Seawater

1994 ◽  
Vol 51 (4) ◽  
pp. 974-980 ◽  
Author(s):  
Stanley D. Rice ◽  
Robert E. Thomas ◽  
Adam Moles
Keyword(s):  
Life History ◽  
Sockeye Salmon ◽  
Salt Water ◽  
Oncorhynchus Nerka ◽  
Early Life History ◽  
Life History Strategies ◽  
Growth Differences ◽  
The Impact ◽  
Lake Type ◽  
River Type

We compared the impact of exposure to seawater on three sockeye salmon (Oncorhynchus nerka) stocks: one that normally migrates to sea as underyearlings (sea-type) and two with the more common life history strategies of 1 (river-type) or 2 (lake-type) yr of freshwater residence prior to seaward migration. Innate differences in survival, ability to regulate tissue chlorides, and oxygen consumption when first introduced into salt water were more evident in April and May when fish were less than 50 mm in length. In fish longer than 50 mm, the only significant differences among the stocks were in saltwater growth. Between June and August, sea-type fish showed faster growth than river-type fish which in turn grew faster than lake-type fish. When introduced into salt water in October, virtually no growth occurred in any stock, regardless of fish size. River-type and lake-type sockeye, which normally overwinter 1 and 2 yr, respectively, in freshwater, can be reared in seawater if underyearlings are raised to a length of 50 mm before release into salt water, similar to the normal life history of sea-type underyearlings. Early life history appears to be influenced more by habitat than by genetics.

Comment: Population Structure and Run Timing of Sockeye Salmon in the Skeena River, British Columbia

2014 ◽  
Vol 34 (6) ◽  
pp. 1167-1170 ◽  
Author(s):  
Michael H. H. Price ◽  
Andrew G. J. Rosenberger ◽  
Greg G. Taylor ◽  
Jack A. Stanford
Keyword(s):  
British Columbia ◽  
Population Structure ◽  
Sockeye Salmon ◽  
Skeena River ◽  
Run Timing

Population Structure and Run Timing of Sockeye Salmon in the Skeena River, British Columbia: Response to Comment

2014 ◽  
Vol 34 (6) ◽  
pp. 1171-1176 ◽  
Author(s):  
Terry D. Beacham ◽  
Steven Cox-Rogers ◽  
Cathy MacConnachie ◽  
Brenda McIntosh ◽  
Colin G. Wallace
Keyword(s):  
British Columbia ◽  
Population Structure ◽  
Sockeye Salmon ◽  
Skeena River ◽  
Run Timing

Population Structure of Sockeye Salmon of the Central Coast of British Columbia: Implications for Recovery Planning

2003 ◽  
Vol 23 (3) ◽  
pp. 703-720 ◽  
Author(s):  
R. John Nelson ◽  
Chris C. Wood ◽  
Glenn Cooper ◽  
Christian Smith ◽  
Ben Koop
Keyword(s):  
British Columbia ◽  
Population Structure ◽  
Sockeye Salmon ◽  
Central Coast ◽  
Recovery Planning

Population Structure and Run Timing of Sockeye Salmon in the Skeena River, British Columbia

2014 ◽  
Vol 34 (2) ◽  
pp. 335-348 ◽  
Author(s):  
Terry D. Beacham ◽  
Steven Cox-Rogers ◽  
Cathy MacConnachie ◽  
Brenda McIntosh ◽  
Colin G. Wallace
Keyword(s):  
British Columbia ◽  
Population Structure ◽  
Sockeye Salmon ◽  
Skeena River ◽  
Run Timing

Population structure and stock identification of sockeye salmon (Oncorhynchus nerka) in coastal lakes in British Columbia, Canada

2005 ◽  
Vol 83 (6) ◽  
pp. 834-844 ◽  
Author(s):  
T D Beacham ◽  
B McIntosh ◽  
C MacConnachie
Keyword(s):  
British Columbia ◽  
Population Structure ◽  
Microsatellite Loci ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Coastal Lakes ◽  
Queen Charlotte Islands ◽  
Accuracy And Precision ◽  
The Mean ◽  
Mixed Stock

Population structure of sockeye salmon, Oncorhynchus nerka (Walbaum, 1792), from coastal lakes in British Columbia was determined from a survey of variation of 14 microsatellite loci, with approximately 6400 sockeye salmon analyzed from 40 populations. Populations from the Queen Charlotte Islands displayed fewer alleles per locus than did populations in other regions. Genetic differentiation among the populations surveyed was observed, with the mean FST for all loci being 0.077 (SD = 0.006). Differentiation among populations was approximately 13 times greater than annual variation within populations. Regional structuring of the populations surveyed was observed. The accuracy and precision of the estimated stock compositions generally increased as the number of observed alleles at the loci increased. Simulated mixed-stock samples generated from observed population frequencies in different regions suggested that variation at microsatellite loci provided reasonably accurate and precise estimates of stock composition for potential samples from marine or freshwater fisheries.

Population Structure of Dungeness Crab (Cancer magister) in British Columbia

2008 ◽  
Vol 27 (4) ◽  
pp. 901-906 ◽  
Author(s):  
Terry D. Beacham ◽  
Janine Supernault ◽  
Kristina M. Miller
Keyword(s):  
British Columbia ◽  
Population Structure ◽  
Dungeness Crab ◽  
Cancer Magister

Bacterioplankton, Phytoplankton, and Zooplankton Communities in a British Columbia Coastal Lake Before and After Nutrient Reduction

1986 ◽  
Vol 43 (8) ◽  
pp. 1504-1514 ◽  
Author(s):  
F. Joan Hardy ◽  
Ken S. Shortreed ◽  
John G. Stockner
Keyword(s):  
British Columbia ◽  
Sockeye Salmon ◽  
Inorganic Nitrogen ◽  
Size Fraction ◽  
Growing Season ◽  
Nutrient Reduction ◽  
Nitrogen And Phosphorus ◽  
Coastal Lake ◽  
Before And After ◽  
High Concentrations

Inorganic nitrogen and phosphorus were applied weekly during the growing season from 1980 to 1982 and twice weekly in 1983 to Hobiton Lake, a warm monomictic coastal lake in British Columbia. The lake was not fertilized in 1984. Average numbers of bacteria during the growing season decreased from a high of 1.53 × 106∙mL−1 in the fertilized condition to 0.84 × 106∙mL−1 in the unfertilized condition. Chlorophyll a concentrations decreased from a maximum seasonal average of 2.69 μg∙L−1 (1981) to 1.30 μg∙L−1 (1984), and algal numbers decreased from 5.83 × 104∙mL−1 (1983) to 2.29 × 104∙mL−1 (1984). Although the numbers of phytoplankton in each size fraction (picoplankton, nanoplankton, or microplankton) decreased in the unfertilized condition, the greatest change was an almost fourfold decrease in picoplankton, which consisted of 90% cyanobacteria (primarily Synechococcus spp.). Abundance of the large diatoms Rhizosolenia spp. and Melosira spp. increased in 1984, resulting in an increase in average seasonal algal volume. Average densities of medium (0.15–0.84 mm) and large (0.85–1.5 mm) zooplankton were greatest in 1982, while rotifers and small zooplankton (0.10–0.14 mm) were most dense in 1984 following nutrient reduction. The lake had relatively high concentrations of planktivorous juvenile sockeye salmon (Oncorhynchus nerka) that appeared to minimize any direct effect of nutrient additions on zooplankton densities.

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