Seasonal reproductive changes in the American robin (Turdus migratorius L.) of the Pacific Northwest

1981 ◽  
Vol 59 (2) ◽  
pp. 212-217 ◽  
Author(s):  
D. Lynne Kemper ◽  
J. Mary Taylor
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Testis Weight ◽  
Turdus Migratorius ◽  
American Robin ◽  
Hatching Time ◽  
The Pacific ◽  
Breeding Condition ◽  
Fledgling Success ◽  
Almost All

Gonadal analysis of the American robin of southwestern British Columbia indicates that males progress rapidly into breeding condition after mid-March. Females respond more slowly but before mid-April may be laying eggs. Males begin to regress in testis weight before summer solstice, although all are spermatogenic until July. By this time, females are incubating the last clutch of eggs of the season and almost all other adults are postbreeding. They revert rapidly to gonads of winter size and status.In most reproductive parameters, those of the American robin of southwestern British Columbia are essentially like those of robins throughout the rest of North America; however, two major differences have emerged in this study. One concerns this robin's seasonally early deviation from hatching time predictions for the American robin elsewhere, based on April noon-time temperature variables, and the other is its rate of egg-to-fledgling success which is higher than that recorded for any other subspecies.

Experiments on Oral Secretion of the Rocky Mountain Wood Tick, Dermacentor andersoni Stiles (Acarina: Ixodidae)

1957 ◽  
Vol 89 (1) ◽  
pp. 1-5 ◽  
Author(s):  
J. D. Gregson
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Rocky Mountain ◽  
Dermacentor Variabilis ◽  
Oral Secretion ◽  
Amblyomma Maculatum ◽  
Dermacentor Andersoni ◽  
The Pacific ◽  
Tick Paralysis ◽  
Rocky Mountain Wood Tick

Tick paralysis continues to be one of the most baffling and fascinating tickborne diseases in Canada. It was first reported in this country by Todd in 1912. Since then about 250 human cases, including 28 deaths, have been recorded from British Columbia. Outbreaks in cattle have affected up to 400 animals at a time, with losses in a herd as high as 65 head. Although the disease is most common in the Pacific northwest, where it is caused by the Rocky Mountain wood tick, Dermacentor andersoni Stiles, it has lately been reported as far south as Florida and has been produced by Dermacentor variabilis Say, Amblyomma maculatum Koch, and A. americanum (L.) (Gregson, 1953). The symptoms include a gradual ascending symmetrical flaccid paralysis. Apparently only man, sheep, cattle, dogs, and buffalo (one known instance) are susceptible, but even these may not necessarily be paralysed.

1999 Pacific Northwest Labor History Association Conference

2000 ◽  
Vol 57 ◽  
pp. 117-119 ◽  
Author(s):  
Daniel Jacoby
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Labor History ◽  
Definitive Answer ◽  
Preferable Alternative ◽  
The Pacific ◽  
The Moment ◽  
Academic Conferences

I cannot provide a definitive answer to those of us pondering what the best alternative to capitalism is, but after attending the Pacific Northwest Labor History Association (PNLHA) Conference in Westminster, British Columbia, over the weekend of May 28–30, 1999, I can tell you that this is certainly a preferable alternative to standard academic conferences. As usual, the PNLHA was able to produce a cadre of historians (from the trades as well as academia), active unionists, and old-timers whose memories are as tapable as a keg of beer. Although the association designates labor history as its subject, newly elected President Ross Rieder likes to say, “History ends the moment before now.”

Notes on Parathion-Resistant Strains of Two Phytophagous Mites and a Predacious Mite in British Columbia

1958 ◽  
Vol 90 (2) ◽  
pp. 92-97 ◽  
Author(s):  
C. V. G. Morgan ◽  
N. H. Anderson
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Predacious Mites ◽  
Predacious Mite ◽  
Phytophagous Mites ◽  
European Red Mite ◽  
The Pacific ◽  
Resistant Strains ◽  
Tetranychus Pacificus

The existence of strains of mites resistant to parathion has been well established (Garman, 1950; Lienk, Dean, & Chapman, 1952; Newcomer & Dean, 1952; Smith & Fulton, 1951). Resistant strains of the European red mite, Metatetranychus ulmi (Koch), first occurred in orchards of the Pacific northwest in 1950 (Newcomer, 1951; O'Neill & Hantsbarger, 1951), approximately three years after parathion was first used as an acaricide. Two other species of orchard mites, the Pacific mite, Tetranychus pacificus McG., and T. mcdanieli McG., were subsequently reported to have developed parathion-resistant strains in the same area (Newcomer & Dean, 1953). Though parathion is lethal to most predacious mites and insects, Huffaker and Kennett (1953) found a difference in tolerance between species of Typhlodromus in the field and in the laboratory: T. reticulatus Oudms. was very susceptible to parathion whereas T. occidentalis Nesbitt was not appreciably affected by it.

The emergence of Cryptococcus gattii in British Columbia and the Pacific Northwest

2008 ◽  
Vol 10 (1) ◽  
pp. 58-65 ◽  
Author(s):  
Karen H. Bartlett ◽  
Sarah E. Kidd ◽  
James W. Kronstad
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Cryptococcus Gattii ◽  
The Pacific

Bioactivity-guided isolation of the active compounds from Rosa nutkana and quantitative analysis of ascorbic acid by HPLCThis article is one of a selection of papers published in this special issue (part 1 of 2) on the Safety and Efficacy of Natural Health Products.

2007 ◽  
Vol 85 (9) ◽  
pp. 865-871 ◽  
Author(s):  
Eduardo M. Jovel ◽  
Xi Ling Zhou ◽  
Dong Sheng Ming ◽  
Tanya R. Wahbe ◽  
G.H. Neil Towers
Keyword(s):  
British Columbia ◽  
Ascorbic Acid ◽  
Pacific Northwest ◽  
Aboriginal People ◽  
Natural Health Products ◽  
Magnetic Resonance Data ◽  
Therapeutic Uses ◽  
The Pacific ◽  
Health Products ◽  
Weak Antibacterial Activity

Rosa nutkana Presl. (Rosaceae) is distributed abundantly throughout central and southern areas of British Columbia, Canada. Aboriginal people in the Pacific Northwest have traditionally used R. nutkana as a food, medicine, and source of cultural material. The methanolic extract of the fruits of R. nutkana was previously found to have inhibitory activity against methicillin-resistant Staphylococcus aureus (MRSA). In our study, bioactivity-guided fractionation of the methanol extract from R. nutkana led to the isolation of the following 10 compounds: (i) tormentic acid, (ii) euscaphic acid, (iii) ursolic acid, (iv) maslinic acid, (v) quercetin, (vi) catechin gallate, (vii) quercetin-3-O-glucoside, (viii) 1,2,3,4,6-penta-O-galloyl-β-d-glucoside, (ix) l-ascorbic acid (vitamin C), and (x) 1,6-digalloyl-β-d-glucoside. Structures were elucidated by ultraviolet, infrared, mass spectrometry, and nuclear magnetic resonance data, as well as by comparison with those of the literature. The compounds quercetin, catechin gallate, quercetin-3-O-glucoside, 1,2,3,4,6-penta-O-galloyl-β-d-glucoside, and 1,6-digalloyl-β-d-glucoside exhibited weak antibacterial activity against MRSA. Our research demonstrates the value of traditional knowledge held by Aboriginal people in the Pacific Northwest with respect to uses of R. nutkana. Some described uses in the ethnobotanical literature correspond to activities observed under laboratory conditions. Further work on British Columbia Rosa spp. may contribute to identifying other potential therapeutic uses.

Early Storage and Sedentism on the Pacific Northwest Coast: Ancient DNA Analysis of Salmon Remains from Namu, British Columbia

2006 ◽  
Vol 71 (1) ◽  
pp. 123-140 ◽  
Author(s):  
Aubrey Cannon ◽  
Dongya Y. Yang
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Ancient Dna ◽  
Dna Analysis ◽  
Pink Salmon ◽  
Population Expansion ◽  
Pacific Northwest Coast ◽  
The Pacific ◽  
Ancient Dna Analysis ◽  
Salmon Fishery

Ancient DNA identification of salmon remains from the site of Namu on the central coast of British Columbia shows use of a variety of species and an emphasis on pink salmon over the course of the past 7,000 years. These results support arguments that Namu was a permanent village settlement dependent on a salmon storage economy throughout this time. This pattern of subsistence and settlement predates by several millennia the first substantial evidence for population expansion or social differentiation in the region. Periodic salmon shortages in the period after 2000 cal B.C., which are associated with local and regional disruptions in settlement and increased reliance on more marginal resources, appear to be the result of failures in the pink salmon fishery.

STUDIES OF VIRUS DISEASES OF STRAWBERRIES IN BRITISH COLUMBIA: I. THE REACTION OF THE BRITISH SOVEREIGN VARIETY AND THE INDICATOR FRAGARIA VESCA TO YELLOWS

1951 ◽  
Vol 29 (3) ◽  
pp. 182-188 ◽  
Author(s):  
Randal E. Fitzpatrick ◽  
Frances C. Mellor
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Virus Disease ◽  
Fragaria Vesca ◽  
Virus Diseases ◽  
Field Evidence ◽  
The Pacific ◽  
Experimental Inoculation

British Sovereign, the commercial strawberry variety of British Columbia, has shown no field evidence of degeneration from the virus disease, yellows, that is attacking the Marshall variety in the Pacific Northwest. However, experimental inoculation of British Sovereign by stolon grafting to a yellows-infected Marshall plant proved the British Sovereign to be susceptible to yellows. As with the Marshall, infected plants were reduced in size and the foliage tended to flatten towards the grounds but, unlike the Marshall, there was no pronounced yellowing. When Fragaria vesca was grafted to a yellows-infected Marshall plant the reaction was rapid and severe. The older leaves flattened to the ground, the young runner tips hooked back, the newly developing leaves, though relatively well proportioned, were minute and yellow at the margins, and the plants eventually died.

scholarly journals Hemithea aestivaria (Hübner) (Lepidoptera: Geometridae), a Palaearctic moth new to eastern North America

2021 ◽  
Author(s):  
Christian Schmidt ◽  
Alexandre Anctil
Keyword(s):  
British Columbia ◽  
North America ◽  
Pacific Northwest ◽  
North American ◽  
Eastern North America ◽  
Urban Centers ◽  
Eastern Canada ◽  
Restricted Area ◽  
The Pacific ◽  
Geometrid Moth

The geometrid moth Hemithea aestivaria (Hübner, 1789) was introduced from Europe to North America, first detected in British Columbia in 1973. Until 2019, its North American range was limited to a restricted area of the Pacific Northwest. Here, we report on the first records of H. aestivaria for eastern North America from three widely separated urban centers in eastern Canada during 2019-2020.

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