First Record of Whitebait Smelt (Allosmerus elongatus) from Juan de Fuca Strait, British Columbia

1971 ◽  
Vol 28 (10) ◽  
pp. 1681-1681
Author(s):  
W. E. Barraclough ◽  
R. M. Wilson
Keyword(s):  
British Columbia ◽  
First Record ◽  
Juan De Fuca ◽  
First Time ◽  
Juan De Fuca Strait

The whitebait smelt Allosmerus elongatus (Ayres) is recorded from British Columbia for the first time on the basis of three specimens from Juan de Fuca Strait caught November 2, 1969.

Seiche Excitation in Port San Juan, British Columbia

1979 ◽  
Vol 36 (10) ◽  
pp. 1223-1227
Author(s):  
D. D. Lemon ◽  
P. H. LeBlond ◽  
T. R. Osborn
Keyword(s):  
British Columbia ◽  
Water Waves ◽  
Pressure Gauge ◽  
Low Frequency ◽  
San Juan ◽  
External Forcing ◽  
Edge Waves ◽  
Rectangular Basin ◽  
Juan De Fuca ◽  
Juan De Fuca Strait

Seiche motions observed in San Juan Harbour with a bottom-mounted pressure gauge have been Fourier-analyzed and interpreted in terms of a theoretical model of oscillations in a rectangular basin with an exponential depth profile. Two of the observed periods (at 14.6 and 38.5 min) are identified with resonances of the basin; two other significant low frequency peaks (at 21 and 55 min) do not coincide with resonant periods of the basin and must be due to strong external forcing. Higher frequency fluctuations (20–160 s) are attributed to swell and to its subharmonic interactions with edge waves. Key words: water waves, seiches, mathematical model, Juan de Fuca Strait, British Columbia

Late Pleistocene history and geomorphology, southwestern Vancouver Island, British Columbia

1979 ◽  
Vol 16 (9) ◽  
pp. 1645-1657 ◽  
Author(s):  
Neville F. Alley ◽  
Steven C. Chatwin
Keyword(s):  
British Columbia ◽  
Continental Shelf ◽  
Late Pleistocene ◽  
Vancouver Island ◽  
Glacial Lakes ◽  
Small Lakes ◽  
Strait Of Georgia ◽  
Coast Mountains ◽  
Juan De Fuca ◽  
Juan De Fuca Strait

The major Pleistocene deposits and landforms on southwestern Vancouver Island are the result of the Late Wisconsin (Fraser) Glaciation. Cordilleran glaciers formed in the Vancouver Island Mountains and in the Coast Mountains had advanced down Strait of Georgia to southeastern Vancouver Island after 19 000 years BP. The ice split into the Puget and Juan de Fuca lobes, the latter damming small lakes along the southwestern coastal slope of the island. During the maximum of the glaciation (Vashon Stade), southern Vancouver Island lay completely under the cover of an ice-sheet which flowed in a south-southwesterly direction across Juan de Fuca Strait, eventually terminating on the edge of the continental shelf. Deglaciation was by downwasting during which ice thinned into major valleys and the strait. Most upland areas were free of ice down to an elevation of 400 m by before 13 000 years BP. A possible glacier standstill and (or) resurgence occurred along Juan de Fuca Strait and in some interior upland valleys before deglaciation was complete. Glacial lakes occupied major valleys during later stages of deglaciation.

Ramellogammarus vancouverensis Bousfield (Amphipoda) as an intermediate host for salmonid parasites in British Columbia

1982 ◽  
Vol 60 (5) ◽  
pp. 1100-1104 ◽  
Author(s):  
L. Margolis ◽  
F. Moravec
Keyword(s):  
British Columbia ◽  
North America ◽  
Intermediate Host ◽  
First Record ◽  
Vancouver Island ◽  
Pacific Region ◽  
Salmonid Fishes ◽  
Swim Bladder ◽  
The Pacific ◽  
First Time

Larvae of the nematode Salvelinema walkeri (Ekbaum, 1935) and metacercariae of the trematode Crepidostomum metoecus (Braun, 1900) are recorded for the first time from the amphipod Ramellogammarus vancouverensis Bousfield, 1979 (Amphipoda: Gammaridae).The infected amphipods were collected from De Mamiel Creek, southwestern Vancouver Island, British Columbia. Brief descriptions are given of both parasites, which as adults live in salmonid fishes. This report provides the first record of an intermediate host for S. walkeri, a swim-bladder parasite of salmonids of the Pacific region of North America, and of an intermediate host of a Crepidostomum species in the Pacific region of Canada.

Concentrations of Nutrients and Chlorophyll on a Cross-Channel Transect in Juan de Fuca Strait, British Columbia

1978 ◽  
Vol 35 (3) ◽  
pp. 305-314 ◽  
Author(s):  
A. G. Lewis
Keyword(s):  
British Columbia ◽  
Key Words ◽  
Oceanic Water ◽  
Inshore Water ◽  
Geostrophic Flow ◽  
Juan De Fuca ◽  
Southern Side ◽  
Northern Side ◽  
The Cross ◽  
Juan De Fuca Strait

Nutrient and chlorophyll values were measured hourly at one of four stations on a cross-channel transect, over a 25-h period during each of 5 mo. Nitrate values increased with depth, chlorophyll decreased, and phosphate remained essentially unchanged during most months. Chlorophyll and phosphate values did not show consistent cross-channel trends, while nitrate levels were frequently higher on the southern side of the Strait. The cross-channel nitrate pattern can be at least partially explained in terms of geostrophic flow; greater amounts of nitrate-rich oceanic water enter at depth on the southern side of the Strait, while nitrate poor inshore water exists near the surface on the northern side. Key words: nutrients, chlorophyll, Juan de Fuca Strait

Sediment characteristics and sea-level history of Royal Roads Anchorage, Victoria, British Columbia

1988 ◽  
Vol 25 (11) ◽  
pp. 1800-1810 ◽  
Author(s):  
R. H. Linden ◽  
P. J. Schurer
Keyword(s):  
British Columbia ◽  
High Resolution ◽  
Sea Level ◽  
Seismic Reflection ◽  
Sediment Characteristics ◽  
Sea Floor ◽  
Juan De Fuca ◽  
History Of ◽  
Nearshore Sediments ◽  
Juan De Fuca Strait

High-resolution and airgun seismic-reflection mapping of the approaches to Esquimalt Harbour, Juan de Fuca Strait, reveal that offshore, sea-floor sediments consist of a widespread glaciomarine unit recognizable to the entrance of the strait. The upper part of the unit has been dated at approximately 10 000 radiocarbon years BP. An early postglacial sea-level low of at least −50 m appears to have formed a widespread unconformity. Nearshore sediments above the unconformity consist of sands, muddy fine sands, and minor gravel that were deposited in a prograding marine environment. Sediments have been accumulating off Esquimalt Harbour at a rate of approximately 1.9 cm per 100 years.

Copepoda (Poecilostomatoida and Siphonostomatoida) from deep-sea hydrothermal vent areas off British Columbia, including Amphicrossus altalis, a new species of Erebonasteridae, with notes on the taxonomic position of the genus Tychidion Humes

1992 ◽  
Vol 70 (7) ◽  
pp. 1369-1380 ◽  
Author(s):  
Arthur G. Humes ◽  
Rony Huys
Keyword(s):  
British Columbia ◽  
Deep Sea ◽  
Hydrothermal Vent ◽  
New Records ◽  
Taxonomic Position ◽  
Juan De Fuca Ridge ◽  
Anterior Surface ◽  
Juan De Fuca ◽  
First Time ◽  
A New Species

Amphicrossus altalis, n.sp., belonging to the primitive poecilostomatoid family Erebonasteridae, was found at a depth of 2420 m at the Juan de Fuca Ridge off British Columbia. The male of an Amphicrossus species is described for the first time. The new copepod differs from the two recognized species of Amphicrossus in its body surface being not highly ornamented with spinules, its smooth anterior surface of the labrum, and the dimensions of the fifth leg. New records for Benthoxynus spiculifer Humes, 1984, Aphotopontius forcipatus Humes, 1987, and Stygiopontius quadrispinosus Humes, 1987, are included. The clausidiid genus Tychidion is redescribed and its taxonomic position discussed.

scholarly journals First record of Vallonia costata (O. F. Müller, 1774) (Gastropoda, Eupulmonata, Valloniidae) from British Columbia, Canada, confirmed by partial-COI gene sequence

Check List ◽  
2019 ◽  
Vol 15 (2) ◽  
pp. 287-293
Author(s):  
Annegret Nicolai ◽  
Robert G. Forsyth
Keyword(s):  
British Columbia ◽  
Gene Sequence ◽  
First Record ◽  
Shell Morphology ◽  
Coi Gene ◽  
Terrestrial Snail ◽  
Gene Data ◽  
First Time

The minute terrestrial snail Vallonia costata (O. F. Müller, 1774) is reported for the first time from the province of British Columbia, Canada. The identification was based on shell morphology and confirmed by COI gene data. This species is presumed to be introduced to the province.

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