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

ABSTRACT Cryptococcus gattii has recently emerged as a pathogen of humans and animals in the temperate climate of Vancouver Island, British Columbia (B.C.). The majority (∼95%) of the isolates from the island belong to the VGII molecular type, and the remainder belong to the VGI molecular type. The goals of this study were to compare patterns of molecular variation among C. gattii isolates from B.C. with those from different areas of the world and to investigate the population structure using a comparative gene genealogy approach. Our results indicate that the C. gattii population in B.C. comprises at least two divergent lineages, corresponding to previously identified VGI and VGII molecular types. The genealogical analysis of strains suggested a predominantly clonal population structure among B.C. isolates, while there was evidence for sexual recombination between different molecular types on a global scale. We found no geographic pattern of strain relationships, and nucleotide sequence comparisons revealed that genotypes among isolates from B.C. were also present among isolates from other areas of the world, indicating extensive strain dispersal. The nucleotide sequence diversity among isolates from B.C. was similar to that among isolates from other areas of the world.

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Reconnaissance between Skeena River and Stewart, British Columbia

10.4095/103192 ◽

1924 ◽

Cited By ~ 1

Author(s):

G Hanson

Keyword(s):

British Columbia ◽

Skeena River

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Population structure and stock identification of chum salmon (Oncorhynchus keta) from British Columbia determined with microsatellite DNA variation

Canadian Journal of Zoology ◽

10.1139/z08-079 ◽

2008 ◽

Vol 86 (9) ◽

pp. 1002-1014 ◽

Cited By ~ 8

Author(s):

Terry D. Beacham ◽

Brian Spilsted ◽

Khai D. Le ◽

Michael Wetklo

Keyword(s):

British Columbia ◽

Population Structure ◽

Chum Salmon ◽

Oncorhynchus Keta ◽

Stock Identification ◽

Dna Variation ◽

Coastal Fisheries ◽

Chum Salmon Oncorhynchus Keta ◽

Regional Estimates ◽

Mixed Stock

Variation at 14 microsatellite loci was surveyed in 205 populations of chum salmon ( Oncorhynchus keta (Walbaum in Artedi, 1792)) from British Columbia to determine population structure and the possible application of microsatellites to estimate stock composition of chum salmon in mixed-stock fisheries. The genetic differentiation index (FST) over all populations and loci was 0.016, with individual locus values ranging from 0.006 to 0.059. Sixteen regional stocks were defined in British Columbia for stock identification applications. Analysis of simulated fishery samples suggested that accurate and precise regional estimates of stock composition should be produced when the microsatellites were used to estimate stock compositions. The main stocks that constitute the October 2007 samples of migrating chum salmon through Johnstone Strait in southern British Columbia were Fraser River (45%–64%), southern British Columbia mainland (22%), and east coast Vancouver Island (13%–28%), within the range of those to be expected in samples from Johnstone Strait. Microsatellites have the ability to provide fine-scale resolution of stock composition in British Columbia coastal fisheries.

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Genetic diversity and population structure ofValdensinia heterodoxa, a potential biocontrol agent for salal in coastal British Columbia

Canadian Journal of Plant Pathology ◽

10.1080/07060660509507257 ◽

2005 ◽

Vol 27 (4) ◽

pp. 559-571 ◽

Cited By ~ 2

Author(s):

Jennifer E. Wilkin ◽

Carol Ritland ◽

Kermit Ritland ◽

Yousry A. El-Kassaby ◽

Simon F. Shamoun

Keyword(s):

Genetic Diversity ◽

British Columbia ◽

Population Structure ◽

Biocontrol Agent ◽

Potential Biocontrol Agent ◽

Coastal British Columbia

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Some geographic variations in Picea sitchensis and their ecologic interpretation

Canadian Journal of Botany ◽

10.1139/b68-110 ◽

1968 ◽

Vol 46 (6) ◽

pp. 787-798 ◽

Cited By ~ 27

Author(s):

R. Daubenmire

Keyword(s):

British Columbia ◽

Picea Sitchensis ◽

Species Range ◽

Northern California ◽

Geographic Variations ◽

History Of ◽

Length Width ◽

Skeena River ◽

Data Collections ◽

Insular Populations

Mass collections of Picea sitchensis, and hybrids, extending from Haines, Alaska, to northern California have been studied with respect to morphology of the ovuliferous cones, twigs, and needles. The Pleistocene history of the species has been reviewed. A north–south gradient occurs in size of cone, length–width ratios of cone scales, sterigma angle, and phyllotaxy. The gradient is probably clinal and appears unaffected by the northerly three-fourths of the species range being in glaciated territory where Pleistocene survival, on nunataks, is suggested by the data. Collections along two sections of the Skeena River in British Columbia are interpreted as hybrid P. sitchensis × P. glauca populations backcrossed with the nearest one of the two parents, i.e., with P. sitchensis near the coast and P. glauca farther inland. Insular populations tend to show less variability in length–width ratios of the ovuliferous scales than do mainland populations.

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