scholarly journals Some Factors Influencing the Distribution of Pelagic Copepods in the Queen Charlotte Islands Area

1957 ◽  
Vol 14 (2) ◽  
pp. 165-202 ◽  
Author(s):  
Frances Ella Cameron
Keyword(s):  
British Columbia ◽  
Water Circulation ◽  
Copepod Species ◽  
North Coast ◽  
Queen Charlotte Islands ◽  
The North ◽  
Factors Influencing ◽  
Circulation Patterns ◽  
Pelagic Copepods

The distribution of certain copepod species of the north coast of British Columbia suggests that breeding is restricted to limited regions of well-defined temperature and salinity characteristics. Currents are responsible for the spread of juveniles and adults from these areas. Probable water circulation patterns in the vicinity of the Queen Charlotte Islands are inferred from the plankton collections.

scholarly journals Evidence for Freshwater Residualism in Coho Salmon, Oncorhynchus kisutch, From a Watershed on the North Coast of British Columbia

2017 ◽  
Vol 130 (4) ◽  
pp. 336 ◽  
Author(s):  
Eric A Parkinson ◽  
Chris J Perrin ◽  
Daniel Ramos-Espinoza ◽  
Eric B Taylor
Keyword(s):  
British Columbia ◽  
Fresh Water ◽  
Coho Salmon ◽  
Pacific Salmon ◽  
Oncorhynchus Kisutch ◽  
Water Levels ◽  
North Coast ◽  
The North ◽  
Seaward Migration ◽  
Mature Fish

The Coho Salmon, Oncorhynchus kisutch, is one of seven species of Pacific salmon and trout native to northeastern Pacific Ocean watersheds. The species is typically anadromous; adults reproduce in fresh water where juveniles reside for 1–2 years before seaward migration after which the majority of growth occurs in the ocean before maturation at 2–4 years old when adults return to fresh water to spawn. Here, we report maturation of Coho Salmon in two freshwater lakes on the north coast of British Columbia apparently without their being to sea. A total of 15 mature fish (11 males and four females) were collected in two lakes across two years. The mature fish were all at least 29 cm in total length and ranged in age from three to five years old. The occurrence of Coho Salmon that have matured in fresh water without first going to sea is exceedingly rare in their natural range, especially for females. Such mature Coho Salmon may represent residual and distinct breeding populations from those in adjacent streams. Alternatively, they may result from the ephemeral restriction in the opportunity to migrate seaward owing to low water levels in the spring when Coho Salmon typically migrate to sea after 1–2 years in fresh water. Regardless of their origin, the ability to mature in fresh water without seaward migration may represent important adaptive life history plasticity in response to variable environments.

Hydrometeorological thresholds for landslide initiation and forest operation shutdowns on the north coast of British Columbia

Landslides ◽  
2006 ◽  
Vol 3 (3) ◽  
pp. 228-238 ◽  
Author(s):  
Matthias Jakob ◽  
Kris Holm ◽  
Owen Lange ◽  
James W. Schwab
Keyword(s):  
British Columbia ◽  
North Coast ◽  
The North ◽  
Forest Operation

Blackflies (Diptera: Simuliidae) of the Queen Charlotte Islands, British Columbia, with discussion of their origin and description of Simulium (Hellichiella) nebulosum n. sp.

1986 ◽  
Vol 64 (1) ◽  
pp. 218-227 ◽  
Author(s):  
D. C. Currie ◽  
P. H. Adler
Keyword(s):  
British Columbia ◽  
North American ◽  
Cytological Study ◽  
Queen Charlotte Islands ◽  
The North

A morphological and cytological study on blackflies of the Queen Charlotte Islands, British Columbia, revealed a total of 16 species in three genera: Prosimulium (6 species), Simulium (9 species), and Stegopterna (1 species). Included is a description of Simulium (Hellichiella) nebulosum n. sp. Notes on distribution and bionomics are provided for each species. AH species collected on the Queen Charlotte Islands are also found on the North American mainland. We conclude that the origin of the present-day simuliid fauna is best explained by post-Wisconsinan dispersal from mainland populations. This conclusion does not support the hypothesis of a continuously mild, Wisconsinan refugium on the Queen Charlotte Islands.

Deep water circulation patterns in the Atlantic during MISs 12-11

2020 ◽  
Author(s):  
Jasmin M. Link ◽  
Norbert Frank
Keyword(s):  
North Atlantic ◽  
Deep Water ◽  
Glacial Maximum ◽  
Water Circulation ◽  
Water Masses ◽  
Overturning Circulation ◽  
The Past ◽  
The North ◽  
Circulation Patterns ◽  
The North Atlantic

<p>Glacial Termination V is one of the most extreme glacial-interglacial transitions of the past 800 ka [1]. However, the changes in orbital forcing from Marine Isotope Stage (MIS) 12 to 11 are comparatively weak. In addition, MIS 11c is exceptionally distinct compared to other interglacials with for example a longer duration [2] and a higher-than-present sea level [3] despite a relative low incoming insolation. Therefore, the term “MIS 11 paradox” was coined [4]. However, only little is known about the Atlantic overturning circulation during this time interval [e.g. 5,6].</p><p>Here, we present Atlantic-wide deep water circulation patterns spanning the glacial maximum of MIS 12, Termination V, and MIS 11. Therefore, sediment cores throughout the Atlantic were analyzed regarding their Nd isotopic composition of authigenic coatings to reconstruct the provenance of the prevailing bottom water masses.</p><p>During the glacial maximum of MIS 12, the deep Atlantic Ocean was bathed with a higher amount of southern sourced water compared to the following interglacial. Termination V is represented by a sharp transition in the high-accumulating sites from the North Atlantic with a switch to northern sourced water masses. MIS 11 is characterized through an active deep water formation in the North Atlantic with active overflows from the Nordic Seas, only disrupted by a short deterioration. A strong export of northern sourced water masses to the South Atlantic points to an overall strong overturning circulation.</p><p> </p><p>[1] Lang and Wolff 2011, Climate of the Past 7: 361-380.</p><p>[2] Candy et al. 2014, Earth-Science Reviews 128: 18-51.</p><p>[3] Dutton et al. 2015, Science 349: aaa4019.</p><p>[4] Berger and Wefer 2003, Geophysical Monograph 137: 41-60.</p><p>[5] Dickson et al. 2009, Nature Geoscience 2: 428-433.</p><p>[6] Vázquez Riveiros et al. 2013, EPSL 371-372: 258-268.</p>

Seasonality and Intensity of Shellfish Harvesting on the North Coast of British Columbia

2013 ◽  
Vol 8 (2) ◽  
pp. 152-169 ◽  
Author(s):  
Meghan Burchell ◽  
Nadine Hallmann ◽  
Andrew Martindale ◽  
Aubrey Cannon ◽  
Bernd R. Schöne
Keyword(s):  
British Columbia ◽  
North Coast ◽  
The North

Oceanographic connectivity among marine protected areas on the north coast of British Columbia, Canada

2005 ◽  
Vol 62 (6) ◽  
pp. 1350-1362 ◽  
Author(s):  
Clifford LK Robinson ◽  
John Morrison ◽  
Michael GG Foreman
Keyword(s):  
British Columbia ◽  
Protected Areas ◽  
Marine Protected Areas ◽  
Particle Dispersion ◽  
Marine Conservation ◽  
Ocean Current ◽  
North Coast ◽  
Late Winter ◽  
Conservation Area ◽  
The North

The main objective of our study was to use a three-dimensional oceanographic simulation model to understand connectivity among the proposed Gwaii Haanas National Marine Conservation Area (GHNMCA) and 10 other proposed or existing marine protected areas (MPAs) on the north Pacific coast of Canada. The simulations were conducted using passive particles placed at three depths and vertically migrating particles for 30 or 90 days in late winter. Simulated surface particle dispersion was found to be consistent with winter ocean current observations made from analysis of satellite imagery, current mooring, and drifter data. The GHNMCA would contribute to a network of MPAs because it supplies and receives particles from other MPAs in northern British Columbia. Model simulations also indicate that the greatest source of particles to GHNMCA originate from 30-m and not 2-m flows. Finally, the simulated mean daily dispersal rate of 2.0 km·day–1 would allow fish and invertebrates to self-seed northern portions of the GHNMCA in winter. Together, the GHNMCA and other MPAs appear to contribute a large percentage of particles to non-MPA regions in northern Hecate Strait, which may be considered a particle sink in winter.

The ammonoid Desmoceras in the Upper Albian (Lower Cretaceous) of Japan

2003 ◽  
Vol 77 (2) ◽  
pp. 314-322 ◽  
Author(s):  
Fumihisa Kawabe ◽  
James W. Haggart
Keyword(s):  
British Columbia ◽  
Shell Growth ◽  
Tropical Region ◽  
Water Currents ◽  
Queen Charlotte Islands ◽  
The North ◽  
Morphologic Variation ◽  
Japanese Islands ◽  
The Western Pacific ◽  
The North Pacific

The Upper Albian Desmoceras species of Japan are described, based on material from the Yezo Supergroup in Hokkaido, north Japan, and from the Fujikawa Formation in Shikoku, southwest Japan. Based on comparative analysis of morphologic variation and shell growth of relevant specimens, we assign the present material to two species: Desmoceras (Desmoceras) latidorsatum (Michelin, 1838) and Desmoceras (Pseudouhligella) poronaicum Yabe, 1904. Japanese examples of the latter species have been previously referred to “Desmoceras (Pseudouhligella) dawsoni,” a Canadian species present on Queen Charlotte Islands, British Columbia, but not represented in the Japanese Islands. Desmoceras (Pseudouhligella) poronaicum is also known from British Columbia.The subgenus Pseudouhligella presumably originated in the eastern Pacific during the Late Albian and subsequently migrated to the western Pacific during latest Albian to earliest Cenomanian time. Desmoceras (D.) latidorsatum is a Tethyan form; its presence in the Upper Albian of the North Pacific probably reflects a northward excursion of warm-water currents from the tropical region during Late Albian time.

On the land mammals of the Queen Charlotte Islands, British Columbia, by John Henry Keen, with a catalogue of specimens

2017 ◽  
Vol 44 (2) ◽  
pp. 259-274 ◽  
Author(s):  
S. G. Sealy
Keyword(s):  
British Columbia ◽  
Natural History ◽  
The United States ◽  
Haida Gwaii ◽  
North Central ◽  
Queen Charlotte Islands ◽  
The North ◽  
Annotated List ◽  
History Of ◽  
Evolution Of Mammals

From 1890 to 1899, the Reverend John Henry Keen collected plants and animals in the vicinity of the Anglican mission at Massett, on the north-central coast of the Queen Charlotte Islands (Haida Gwaii), British Columbia, Canada. Keen's prodigious collecting efforts resulted in the first detailed information on the natural history of that region, particularly of the beetle fauna. Keen also observed and collected mammals, depositing specimens in museums in Canada, England and the United States, for which a catalogue is given. Several mammal specimens provided the basis for new distributional records and nine new taxa, two of which were named for Keen. In 1897, Keen prepared an annotated list of ten taxa of land mammals of the Queen Charlotte Islands, including the first observations of natural history for some of the species. Particularly important were the insightful questions Keen raised about the evolution of mammals isolated on the Islands, especially why certain species, abundant on the mainland, were absent.

Lichens and lichenicolous fungi of the Queen Charlotte Islands, British Columbia, Canada. 2. The Cladoniaceae

1996 ◽  
Vol 74 (7) ◽  
pp. 1147-1180 ◽  
Author(s):  
Irwin M. Brodo ◽  
Teuvo Ahti
Keyword(s):  
British Columbia ◽  
West Coast ◽  
Usnic Acid ◽  
New Combination ◽  
Chemical Variation ◽  
The West ◽  
Lichenicolous Fungi ◽  
Queen Charlotte Islands ◽  
The North ◽  
Oceanic Climate

The Queen Charlotte Islands, off the west coast of British Columbia and with a hypermoist, oceanic climate, has 44 taxa in the Cladoniaceae: 5 species and 1 forma of Cladina, and 34 species with 3 additional subspecies and 1 variety of Cladonia. Two species and one subspecies are described as new to science: Cladonia albonigra Brodo & Ahti, Cladonia schofieldii Ahti & Brodo, and Cladonia ecmocyna Leight. ssp. occidentalis Ahti. In addition, one new combination is made: Cladonia novochlorophaea (Sipman) Brodo & Ahti. Cladonia homosekekaica Nuno, although not part of the Queen Charlotte flora, is also described and discussed. Chemical variation in the Cladoniaceae is examined critically, and many taxa formerly recognized at the species or infraspecific levels are reduced to unnamed chemotypes. The following synonymies were made or confirmed: Cladina aberrans (Abbayes) Hale & W.L. Culb. =Cladina stellaris (Opiz) Brodo; Cladonia squamosa var. subsquamosa (Nyl. ex Leight.) Vain. =Cladonia squamosa Hoffm.; Cladonia pseudostellata Asahina =Cladonia uncialis (L.) F.H. Wigg.; Cladonia japonica Vain. =Cladonia crispata (Ach.) Flot.; Cladonia pseudorangiformis Asahina =Cladonia wainioi Saviez. A thamnolic acid chemotype of Cladonia bellidiflora (Ach.) Schaer. and a thamnolic and usnic acid containing chemotype of Cladonia umbricola Tønsberg & Ahti are common on the Charlottes. Cladonia singularis S. Hammer is reported as new to Canada based on a specimen from Vancouver Island. Cladonia macroptera Räsänen, Cladonia polydactyla (Flörke) Spreng., Cladonia pseudomacilenta Asahina, and Cladonia subsubulata Nyl. are excluded from the North American flora. Cladonia kanewskii Oksner is reported as new to Norway and Europe. Keywords: Cladina, Cladonia, Cladoniaceae, British Columbia.

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