A population-viability-based risk assessment of Marbled Murrelet nesting habitat policy in British Columbia

2006 ◽  
Vol 36 (12) ◽  
pp. 3075-3086 ◽  
Author(s):  
J Douglas Steventon ◽  
Glenn D Sutherland ◽  
Peter Arcese
Keyword(s):  
British Columbia ◽  
Simulation Modelling ◽  
Population Viability ◽  
Nesting Habitat ◽  
Persistence Probability ◽  
Marbled Murrelet ◽  
The Pacific ◽  
Independent Population ◽  
Wide Range ◽  
Nesting Density

The Marbled Murrelet (Brachyramphus marmoratus Gmelin) is a small threatened seabird of the Pacific coast of North America. Through simulation modelling we varied the long-term minimum amounts and quality (nesting density) of old-forest nesting habitat to examine effects on murrelet population viability, our measure of population resilience. Applying diffusion approximations we estimated population longevity and persistence probability under uncertainties of at-sea demography and onshore edge effects affecting nesting success, time scale, spatial scale, and subpopulation structure. We cast our analysis in a Bayesian belief and decision network framework. We also applied the framework to spatially explicit land-use and murrelet inventory data for the northern mainland region of the British Columbia coast. We found a diminishing expected value of persistence probability (EVP), for a single independent population, below a nesting capacity of ≈5000 nesting pairs (≈15 000 birds), accelerating below 2000 pairs. A strategy of multiple semi-independent subpopulations provided a higher joint EVP across a wide range of total nesting capacity. There was little improvement in EVP, for any number of subpopulations, above 10 000 – 12 000 pairs (≈36 000 birds, 45%–60% of coastwide population estimate in 2001). Depending on estimates of nesting density, 12 000 pairs would require between 0.6 and 1.2 million ha of potential old-forest nesting habitat.

Status review of the Marbled Murrelet (Brachyramphus marmoratus) in Alaska and British Columbia

2007 ◽  
Author(s):  
John F. Piatt ◽  
K.J. Kuletz ◽  
A.E. Burger ◽  
Scott A. Hatch ◽  
Vicki L. Friesen ◽  
...  
Keyword(s):  
British Columbia ◽  
Brachyramphus Marmoratus ◽  
Marbled Murrelet

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.

scholarly journals Conservation Evaluation of the Pacific Population of Dwarf Woollyheads, Psilocarphus brevissimus var. brevissimus, in Canada

2006 ◽  
Vol 120 (2) ◽  
pp. 163
Author(s):  
George W. Douglas ◽  
Jenifer L. Penny ◽  
Ksenia Barton
Keyword(s):  
British Columbia ◽  
Coalbed Methane ◽  
Groundwater Levels ◽  
Gas Drilling ◽  
Pacific Population ◽  
South Central ◽  
The Pacific ◽  
Recreational Vehicles ◽  
Forest Openings ◽  
Conservation Evaluation

In Canada, Dwarf Woolly-heads, Psilocarphus brevissimus var. brevissimus, is restricted to the Similkameen River valley, south of Princeton in southwestern British Columbia and the extreme southeast and southwest corners of Alberta and Saskatchewan, respectively. This paper deals with the three British Columbia populations which represent the northwestern limit of the species which ranges from south-central British Columbia, southward in the western United States to Montana, Idaho, Washington, Oregon, Nevada, Utah, Wyoming, California and Baja California, Mexico. In British Columbia, P. brevissimus is associated with calcareous vernal pools and ephemeral pond edges in large forest openings. This habitat is rare in the area the few existing populations could easily be extirpated or degraded through slight changes in groundwater levels, coalbed methane gas drilling, housing development or recreational vehicles.

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.”

Summary of Coastal Geologic Evidence for past Great Earthquakes at the Cascadia Subduction Zone

1995 ◽  
Vol 11 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Brian F. Atwater ◽  
Alan R. Nelson ◽  
John J. Clague ◽  
Gary A. Carver ◽  
David K. Yamaguchi ◽  
...  
Keyword(s):  
British Columbia ◽  
North America ◽  
Subduction Zone ◽  
Forest Soils ◽  
Pacific Coast ◽  
Cascadia Subduction Zone ◽  
Level Change ◽  
The Past ◽  
The Pacific ◽  
Juan De Fuca

Earthquakes in the past few thousand years have left signs of land-level change, tsunamis, and shaking along the Pacific coast at the Cascadia subduction zone. Sudden lowering of land accounts for many of the buried marsh and forest soils at estuaries between southern British Columbia and northern California. Sand layers on some of these soils imply that tsunamis were triggered by some of the events that lowered the land. Liquefaction features show that inland shaking accompanied sudden coastal subsidence at the Washington-Oregon border about 300 years ago. The combined evidence for subsidence, tsunamis, and shaking shows that earthquakes of magnitude 8 or larger have occurred on the boundary between the overriding North America plate and the downgoing Juan de Fuca and Gorda plates. Intervals between the earthquakes are poorly known because of uncertainties about the number and ages of the earthquakes. Current estimates for individual intervals at specific coastal sites range from a few centuries to about one thousand years.

Gyrodiform gastropods from the Pacific Coast Cretaceous and Paleocene

1987 ◽  
Vol 61 (1) ◽  
pp. 70-100 ◽  
Author(s):  
W. P. Popenoe ◽  
L. R. Saul ◽  
Takeo Susuki
Keyword(s):  
British Columbia ◽  
New Taxa ◽  
Late Cretaceous ◽  
West Coast ◽  
Pacific Coast ◽  
Northern California ◽  
Color Patterns ◽  
New Subgenus ◽  
The Pacific

Seven previously described and seven new taxa of gyrodiform naticoids from West Coast Late Cretaceous–Paleocene age strata are discussed. Gyrodes (Gyrodes) dowelli White of Turonian age is a typical Gyrodes; G. robustus Waring from the Paleocene has the shape of Gyrodes s.s. but lacks the crenulations. G. greeni Murphy and Rodda, G. yolensis n. sp., G. quercus n. sp., G. banites n. sp., G. canadensis Whiteaves, G. pacificus n. sp., and G. expansus Gabb comprise the new subgenus Sohlella, which thus ranges from Cenomanian through Maastrichtian. Gyrodes robsauli n. sp. resembles “Polinices” (Hypterita) helicoides (Gray), and Hypterita is reassigned to the Gyrodinae as a subgenus of Gyrodes. Gyrodes onensis n. sp. of Albian age is similar to the G. americanus group of Sohl (1960). Three texa—Natica allisoni (Murphy and Rodda) of Cenomanian age and N. conradiana Gabb and N. conradiana vacculae n. subsp. of Turonian age—which have all been previously considered to be Gyrodes are placed in Natica. Well marked relict color patterns on N. conradiana and N. conradiana vacculae suggest that these naticids from northern California and southern British Columbia were tropical forms.Diversity of taxa and size of specimens are reduced at the end of the Turonian, suggesting a change in West Coast marine conditions at that time.

scholarly journals ANALISIS BIAYA OPERASIONAL KENDARAAN (BOK) DAN WTP (WILLINGNESS TO PAY) PADA BUS AKAP JURUSAN BANJARMASIN - SAMARINDA

2018 ◽  
Vol 1 (2) ◽  
pp. 115
Author(s):  
Bagus Nugroho Putra ◽  
Utami Sylvia Lestari
Keyword(s):  
Willingness To Pay ◽  
Public Transportation ◽  
Operating Costs ◽  
Bus Drivers ◽  
The Public ◽  
Passenger Transportation ◽  
The Pacific ◽  
Wide Range ◽  
Transportation Facilities

Kota Banjarmasin adalah ibu kota provinsi dari Kalimantan Selatan dengan berbagai macam aktivitas. Salah satu angkutan umum Kota Banjarmasin adalah bus AKAP (Antar Kota Antar Provinsi) PO. Pulau Indah Jaya yang melayani transportasi penumpang dengan tujuan kota dan provinsi. Sarana transportasi memiliki tarif biaya yang ditentukan berdasarkan Biaya Operasional Kendaraan (BOK). Tujuan penelitian ini untuk mengetahui besar BOK bus AKAP dengan metode Pacific Consultant International (PCI) dan untuk mengetahui besar tarif yang diinginkan penumpang beserta tanggapan terhadap tarif yang berlaku saat ini Willingness To Pay (WTP).Penelitian ini dilakukan melalui survei wawancara untuk BOK kepada pihak PO. dan sopir bus dengan jumlah data 25 unit bus dan untuk WTP survei wawancara dengan sampel 200 penumpang bus di terminal KM 6 tempat pembelian tiket bus.Besar BOK yang dikeluarkan oleh PO. Pulau Indah Jaya Rp Rp 8.137.912.279 /tahun (bus Non AC) dengan tarif Rp 168.194 /penumpang dan Rp 8.712.239.580 /tahun (bus AC+Toilet) dengan tarif Rp 229.173 /penumpang. Besar nilai WTP bus Non AC Rp 185.000 /penumpang dan AC+Toilet Rp 245.000 /penumpang. Tanggapan terhadap tarif bus AKAP Non AC Rp 175.000 /penumpang dan AC+Toilet Rp 235.000 /penumpang adalah harga tarif bus  sesuai dengan kemampuan penumpang membayar dan mau membayar lebih dengan syarat adanya penambahan pelayanan dan fasilitas.Kata Kunci: Bus AKAP, Biaya Operasional Kendaraan (BOK), Willingness To Pay (WTP)banjarmasin city is the capital of the province of South Borneo with a wide range of activities. One of the public transportation of Banjarmasin city is the bus AKAP (Inter-City Inter Province) PO. Pulau Indah Jaya which serves passenger transportation with a city and provincial destinations. Transportation facilities have a fee that is determined based on Vehicle Operating Costs (VOC). The purpose of this study is to find out the size of the bus AKAP VOC with the Pacific Consultant International (PCI) method and to find out the number of tariffs desired by passengers along with responses to the current rates of Willingness To Pay (WTP).This research was conducted through interview surveys for VOC to PO. parties and bus drivers with data on 25 bus units and for WTP interview surveys with a sample of 200 bus passengers at the terminal KM 6 places to buy bus tickets.VOC amount issued by PO. Pulau Indah Jaya Rp. 8.137.912.279 /year (Non AC buses) with a tariff of Rp 168.194 /passenger and Rp. 8.712.239.580 /year (AC + Toilet bus) at a rate of Rp. 229.173 /passenger. The value of the Non AC WTP bus is Rp. 185.000 /passenger and the AC + Toilet Rp. 245.000 /passenger. The response to the AKAP Non AC bus fare of Rp. 175.000 /passenger and AC + Toilet Rp. 235.000 /passenger is the price of the bus fare according to the ability of the passengers to pay and pay more on the condition of additional services and facilities.Keywords: Bus AKAP, Vehicle Operating Costs (VOC), willingness to pay (WTP) 

scholarly journals Evaluation of Seven Complex Pennisetum Hybrids for Container and Landscape Performance in the Pacific Northwestern United States

2013 ◽  
Vol 23 (4) ◽  
pp. 525-528 ◽  
Author(s):  
Ryan N. Contreras ◽  
Jim Owen ◽  
Wayne Hanna ◽  
Brian Schwartz
Keyword(s):  
United States ◽  
Growth Form ◽  
Field Performance ◽  
Eastern United States ◽  
Randomized Experiments ◽  
Climatic Regions ◽  
The Pacific ◽  
Wide Range ◽  
Complex Hybrid ◽  
Market Preference

Ornamental grasses such as fountaingrass or napiergrass, collectively called pennisetums, belong to the genus Pennisetum, which is a diverse genus with over 80 species adapted to a wide range of climatic regions and known for its drought tolerance. Breeding efforts have led to improvements such as more intense purple foliage color, disease resistance, and apparent sterility. These improved forms have been developed and tested in the eastern United States. The objective of this research was to evaluate container and field performance of seven new complex hybrid pennisetums in the Pacific northwestern United States. Two completely randomized experiments with three replications were conducted over 2 years (2010 and 2011) at two locations. We selected seven trispecific hybrid pennisetums resulting from interploid and interspecific crossing that were given accessions Tift 5, Tift 6, Tift 10, Tift 11, Tift, 13, Tift 15, and Tift 26. Experiment 1 evaluated container performance in Corvallis, OR, while Expt. 2 evaluated field performance in Aurora, OR. Size index (SI), growth form rating, and color rating were collected and analyzed separately by location. In the container study, significant differences were observed among selections for growth form in 2010 and color ratings in both 2010 and 2011. In 2010, Tift 6, Tift 11, Tift 13, and Tift 15 had the highest growth form rating. For color rating, Tift 5, Tift 10, and Tift 26 were among the four highest rated selections in both years. In the field study, Tift 5, Tift 10, Tift 11, and Tift 26 had the highest SI when data were pooled over the 2 years, but all selections reached acceptable size for landscape use during both years of the study. Similarly, there were color differences among selections with Tift 5, Tift 10, Tift 15, and Tift 26 being highest rated. None of the selections survived below winter temperatures of −5 °C at either location during either year of the study. Our evaluations indicate that these selections have potential in the Pacific northwestern United States as annuals. Differences in complex hybrid pennisetums were observed in SI, growth form rating, and color rating. These differences demonstrated the variation among selections and will allow producers to choose desired traits based on market preference.

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