scholarly journals Mitochondrial DNA Suggests High Gene Flow in Ancient Murrelets

The Condor ◽  
2002 ◽  
Vol 104 (1) ◽  
pp. 84-91 ◽  
Author(s):  
Rebecca L. Pearce ◽  
Jesse J. Wood ◽  
Yuri Artukhin ◽  
Timothy P. Birt ◽  
Martin Damus ◽  
...  
Keyword(s):  
British Columbia ◽  
Gene Flow ◽  
Genetic Differentiation ◽  
North Pacific ◽  
Mitochondrial Control Region ◽  
Female Population ◽  
The North ◽  
Effective Female Population Size ◽  
High Gene ◽  
The North Pacific

Abstract Ancient Murrelets (Synthliboramphus antiquus) are subarctic seabirds that breed on islands from British Columbia through Alaska to China. In this study, we used sequence variation in the mitochondrial control region and cytochrome b gene to estimate the extent of genetic differentiation and gene flow among populations both within British Columbia and across the North Pacific. Results suggest that genetic differentiation is low and female-mediated gene flow is high among colonies within British Columbia, in agreement with banding studies. Surprisingly, genetic differentiation appears to be low and gene flow high between British Columbia and Asia. The effective female population size appears to be stable, but the species may have undergone a range expansion. These results suggest that Ancient Murrelets from throughout the North Pacific may represent a single management unit for conservation. El ADN Mitocondrial Sugiere Alto Flujo Génico en Synthliboramphus antiquus Resumen. Synthliboramphus antiquus es una especie de ave marina subártica que se reproduce en islas desde British Columbia a través de Alaska hasta China. En este estudio estimamos el grado de diferenciación genética y de flujo génico entre poblaciones localizadas dentro de British Columbia y a través del Pacífico Norte. Nos basamos en la variación en secuencias de la región control y el gen citocromo b del ADN mitocondrial. Los resultados sugieren baja diferenciación genética y alto flujo génico mediado por las hembras entre las colonias de British Columbia, lo que es consistente con estudios de aves anilladas. Sorprendentemente, la diferenciación genética parece ser baja y el flujo génico alto entre British Columbia y Asia. El tamaño efectivo de la población de hembras parece estar estable, pero la especie podría haber expandido su rango de distribución. Estos resultados sugieren que los S. antiquus de todo el Pacífico Norte pueden representar una sola unidad de manejo en términos de conservación.

Palmaria hecatensis sp. nov. (Rhodophyta, Palmariales) from British Columbia and Alaska with a survey of other Palmaria species

1985 ◽  
Vol 63 (3) ◽  
pp. 474-482 ◽  
Author(s):  
Michael W. Hawkes
Keyword(s):  
British Columbia ◽  
Pacific Ocean ◽  
Geographical Distribution ◽  
North Pacific ◽  
North Pacific Ocean ◽  
Aleutian Islands ◽  
Rocky Shores ◽  
Intertidal Zones ◽  
The North ◽  
The North Pacific

Palmaria hecatensis sp. nov. is described based on material from northern British Columbia. Male gametophytes and tetrasporophytes are thick, coriaceous, flattened blades, linear to lobed in habit and arise from an extensive encrusting basal holdfast. Putative female gametophytes are microscopic multicellular discs. Palmaria hecatensis grows on rocky shores in the midintertidal to lower intertidal zones and has a known geographical distribution from Nootka Island, Vancouver Island, B.C., to Shemya Island in the Aleutian Islands, Alaska. Palmaria hecatensis is compared with other species in the genus and, in addition, another distinctive (and possibly undescribed) Palmaria species from British Columbia and Alaska is discussed, bringing the total number of Palmaria species reported in the North Pacific Ocean to six.

New Nanaimo Group ammonites (Cretaceous, Santonian–Campanian) from British Columbia and Washington State

1989 ◽  
Vol 63 (2) ◽  
pp. 218-227 ◽  
Author(s):  
James W. Haggart ◽  
Peter D. Ward
Keyword(s):  
United States ◽  
British Columbia ◽  
North Pacific ◽  
Washington State ◽  
Western Canada ◽  
Pacific Region ◽  
The North ◽  
North Pacific Region ◽  
The North Pacific

The ammonite species Puzosia (Mesopuzosia) densicostata Matsumoto, Kitchinites (Neopuzosia) japonicus Spath, Anapachydiscus cf. A. nelchinensis Jones, Menuites cf. M. menu (Forbes), Submortoniceras chicoense (Trask), and Baculites cf. B. boulei Collignon are described from Santonian–Campanian strata of western Canada and northwestern United States. Stratigraphic occurrences and ranges of the species are summarized and those taxa important for correlation with other areas in the north Pacific region are noted.

Elemental Mercury Exposure

PEDIATRICS ◽  
1988 ◽  
Vol 81 (5) ◽  
pp. 743-744
Author(s):  
LOY T. SWINEHART
Keyword(s):  
British Columbia ◽  
Case Report ◽  
North Pacific ◽  
Elemental Mercury ◽  
Male Infant ◽  
Mercury Exposure ◽  
Mercury Poisoning ◽  
Pediatric Society ◽  
The North ◽  
The North Pacific

To the Editor.— In the article by Hudson et al1 concerning mercury exposure of children of thermometor plant workers, they stated that "this is the first report demonstrating mercury exposure in children of mercury workers." On Sept 28, 1954, a case report of primary mercury poisoning in an infant was presented at a meeting of the North Pacific Pediatric Society, Victoria, British Columbia, Canada. Unfortunately, the case was never submitted for publication. The patient, a 20-month-old male infant, was referred because of fever, irritability, tremor, and refusal to walk.

The occurrence of shearwaters (Puffinus spp.) off the west coast of Canada

1983 ◽  
Vol 61 (9) ◽  
pp. 2064-2077 ◽  
Author(s):  
Juan R. Guzman ◽  
M. T. Myres
Keyword(s):  
British Columbia ◽  
Continental Shelf ◽  
West Coast ◽  
North Pacific ◽  
Gulf Of Alaska ◽  
Washington State ◽  
The West ◽  
The North ◽  
The Relationship ◽  
The North Pacific

Shearwaters, Puffinus spp., were studied off the west coast of Canada from 1975 to 1978. Sooty shearwaters, P. griseus, were the most abundant shearwaters off British Columbia in both May and September–October. Pink-footed shearwaters, P. creatopus, also occurred in both spring and fall. Flesh-footed shearwaters, P. carneipes, were found only in May. Buller's shearwaters, P. bulleri, were encountered in June and July during cruises across the Gulf of Alaska and in September and October off British Columbia. The recent increase of Buller's shearwater in the North Pacific is documented. A review of records of the short-tailed shearwater, P. tenuirostris, shows that it is usually rare and irregular off the coast of British Columbia. One black-vented shearwater, P. opisthomelas, was seen in the Gulf of Alaska. Sooty shearwaters occur off British Columbia in far lower numbers than off northern California, Oregon or Washington State. The manner in which sooty shearwaters migrate is described. The relationship between shearwater distributions and depths of water over the continental shelf are examined.

British Columbia and the United States: The North Pacific Slope from Fur Trade to Aviation

1943 ◽  
Vol 9 (2) ◽  
pp. 249
Author(s):  
W. T. Easterbrook ◽  
F. W. Howay ◽  
W. N. Sage ◽  
H. F. Angus ◽  
James T. Shotwell
Keyword(s):  
United States ◽  
British Columbia ◽  
North Pacific ◽  
Fur Trade ◽  
The United States ◽  
The North ◽  
Pacific Slope ◽  
The North Pacific

scholarly journals Geolocator tagging links distributions in the non-breeding season to population genetic structure in a sentinel North Pacific seabird

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0240056
Author(s):  
J. Mark Hipfner ◽  
Marie M. Prill ◽  
Katharine R. Studholme ◽  
Alice D. Domalik ◽  
Strahan Tucker ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Pacific Ocean ◽  
Genetic Differentiation ◽  
Breeding Season ◽  
North Pacific ◽  
Western Pacific ◽  
The North ◽  
Wintering Areas ◽  
The North Pacific ◽  
Rhinoceros Auklet

We tested the hypothesis that segregation in wintering areas is associated with population differentiation in a sentinel North Pacific seabird, the rhinoceros auklet (Cerorhinca monocerata). We collected tissue samples for genetic analyses on five breeding colonies in the western Pacific Ocean (Japan) and on 13 colonies in the eastern Pacific Ocean (California to Alaska), and deployed light-level geolocator tags on 12 eastern Pacific colonies to delineate wintering areas. Geolocator tags were deployed previously on one colony in Japan. There was strong genetic differentiation between populations in the eastern vs. western Pacific Ocean, likely due to two factors. First, glaciation over the North Pacific in the late Pleistocene might have forced a southward range shift that historically isolated the eastern and western populations. And second, deep-ocean habitat along the northern continental shelf appears to act as a barrier to movement; abundant on both sides of the North Pacific, the rhinoceros auklet is virtually absent as a breeder in the Aleutian Islands and Bering Sea, and no tagged birds crossed the North Pacific in the non-breeding season. While genetic differentiation was strongest between the eastern vs. western Pacific, there was also extensive differentiation within both regional groups. In pairwise comparisons among the eastern Pacific colonies, the standardized measure of genetic differentiation (FꞌST) was negatively correlated with the extent of spatial overlap in wintering areas. That result supports the hypothesis that segregation in the non-breeding season is linked to genetic structure. Philopatry and a neritic foraging habit probably also contribute to the structuring. Widely distributed, vulnerable to anthropogenic stressors, and exhibiting extensive genetic structure, the rhinoceros auklet is fully indicative of the scope of the conservation challenges posed by seabirds.

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