Reconnaissance between Skeena River and Stewart, British Columbia

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

North American Journal of Fisheries Management ◽

10.1080/02755947.2014.956163 ◽

2014 ◽

Vol 34 (6) ◽

pp. 1171-1176 ◽

Cited By ~ 2

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

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Reconnaissance Between Kitsault River and Skeena River, British Columbia

10.4095/103153 ◽

1923 ◽

Author(s):

G Hanson

Keyword(s):

British Columbia ◽

Skeena River

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The Skeena River District, British Columbia

10.4095/104157 ◽

1910 ◽

Cited By ~ 1

Author(s):

W W Leach

Keyword(s):

British Columbia ◽

Skeena River

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Microsatellite DNA analysis of coastal populations of bull trout (Salvelinus confluentus) in British Columbia: zoogeographic implications and its application to recreational fishery management

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f06-026 ◽

2006 ◽

Vol 63 (5) ◽

pp. 1157-1171 ◽

Cited By ~ 5

Author(s):

Eric B Taylor ◽

A B Costello

Keyword(s):

British Columbia ◽

Microsatellite Dna ◽

Fishery Management ◽

Dna Analysis ◽

Population Subdivision ◽

Fraser River ◽

Bull Trout ◽

Salvelinus Confluentus ◽

Recreational Fishery ◽

Skeena River

Microsatellite DNA variation was assayed among 383 bull trout (Salvelinus confluentus) from 20 Pacific coastal localities from the Skeena River (central British Columbia) to the Olympic Peninsula (western Washington State). An average of 1.7 alleles was resolved per population and heterozygosity averaged 0.35. Twenty-six fish were identified as bull trout × Dolly Varden (Salvelinus malma) hybrids. Population subdivision was substantial (θ = 0.33), but subdivision was higher (θ = 0.46) when interior populations (N = 37) were included, indicating a major genetic distinction between "coastal" and "interior" bull trout. Bull trout populations north of the Squamish River were genetically more similar to interior bull trout than to other more southern coastal populations, suggesting that they had been founded by headwater transfers from interior populations. Individual assignment of bull trout averaged 53.4% correct assignment among populations (range: 12%95%). Mixture analysis indicated that most fish from the lower Fraser River recreational fishery originated from major nearby tributaries (e.g., Pitt, upper Lillooet, and Chilliwack rivers). Our results substantiate the existence of two major evolutionary lineages of bull trout and highlight the importance of tributary habitats for the persistence of local populations, as well as for those that forage in downstream areas on the lower Fraser River.

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Geotectonics of Cretaceous and Eocene plutons in British Columbia: a paleomagnetic fold test

Canadian Journal of Earth Sciences ◽

10.1139/e77-114 ◽

1977 ◽

Vol 14 (6) ◽

pp. 1246-1262 ◽

Cited By ~ 20

Author(s):

D. T. A. Symons

Keyword(s):

British Columbia ◽

North American ◽

Large Scale ◽

Structural Model ◽

Pole Position ◽

North American Plate ◽

The North ◽

Field Evidence ◽

Coast Plutonic Complex ◽

Skeena River

A total of 295 cores (590 specimens) were collected at 59 sites in the Coast plutonic complex along an E–W section southwest of Kitimat, British Columbia. The sites represent the Ponder, Alastair Lake, and Quottoon plutons in the 40–50 Ma eastern K–Ar age zone and the Ecstall and Butedale plutons in the 64–80 Ma central age zone. After af demagnetization a stable remanent magnetization was isolated at 32 sites and these data were combined with available data from the Skeena River section about 100 km to the north. The remanence directions in sites from the NNW-trending north and south limbs of the Hawkesbury Warp provide a positive fold test when compared to the WNW-trending centre limb directions.In the Eocene eastern age zone the NNW limbs give a concordant pole position relative to the cratonic North American pole whereas the centre limb has undergone ≈ 50° of the counter-clockwise rotation and ≈ 10° of upward tilt of its western end to give a discordant pole. In the late Upper Cretaceous central age zone, the Ecstall–Butedale pluton was tilted 15° to the west on all limbs before the Eocene intrusion and Hawkesbury Warp deformation events to give a NNW-trend pole and WNW-trend pole diverging in opposite directions from the cratonic reference pole.The geologic field evidence from structural trends, from fault, fold, contact, and foliation attitudes, and from distribution of plutonic phases is consistent with the structural model. The regional geotectonic events are related to possible Cenozoic plate interactions on the western margin of the North American plate. This combination of concordant and discordant poles cannot be explained in terms of an excursion of the geomagnetic paleopole during intrusion, a large scale northward translation of the western Cordillera during the Cenozoic, or a combination of clockwise rotations and northward translations on the margin of the advancing North American plate. The fold test and polarity reversal pattern indicate that all plutons acquired a primary thermoremanent magnetization (TRM) during cooling and probably within ≈ 1 Ma after emplacement.

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