Lungworms in the Rocky Mountain bighorn sheep of western Canada

1973 ◽  
Vol 51 (8) ◽  
pp. 817-824 ◽  
Author(s):  
Leslie S. Uhazy ◽  
John C. Holmes ◽  
John G. Stelfox
Keyword(s):  
British Columbia ◽  
Seasonal Variation ◽  
Rocky Mountain ◽  
Bighorn Sheep ◽  
Evolutionary Significance ◽  
Western Canada ◽  
Fecal Samples ◽  
Winter Range ◽  
Significant Seasonal Variation ◽  
Near Term

In 58 sets of lungs from bighorns from western Alberta or eastern British Columbia, 91% were infected with Protostrongylus stilesi, and 38% were infected with P. rushi. Four of the five sheep free of P. stilesi were lambs. Lungs from nine near-term fetuses were negative for lungworms.All but 1 of 409 field-collected fecal samples from the same ranges contained larvae of Protostrongylus spp.; counts of larvae per gram of dry feces suggest a clumped distribution of lungworms. Analysis of monthly samples from one herd indicated a significant seasonal variation, with high numbers of larvae shed by bighorns on winter range. The use of fecal analyses in assessing severity of infection and the evolutionary significance of the clumped distribution of lungworms are discussed.

Coccidia of Rocky Mountain bighorn sheep in Western Canada

1971 ◽  
Vol 49 (11) ◽  
pp. 1461-1464 ◽  
Author(s):  
Leslie S. Uhazy ◽  
Jerome L. Mahrt ◽  
John C. Holmes
Keyword(s):  
British Columbia ◽  
National Park ◽  
Rocky Mountain ◽  
Bighorn Sheep ◽  
Western Canada ◽  
Fecal Samples

A survey of coccidia in the Rocky Mountain bighorn sheep (Ovis. c. canadensis) in Alberta and Kootenay National Park, British Columbia, was conducted from the winter of 1967 to the spring of 1969. Ninety percent of 510 fecal samples examined were positive for coccidia. The species recovered, in order of prevalence, were Eimeria ovina (syn., E. arloingi) (56%), E. parva (35%), E. crandallis (34%), E. ahsata (33%), E. ninakohlyakimovae (19%), E. faurei (6%), E. intricata (5%) and E. granulosa (1%). Coccidiosis was not encountered in the field; however, evidence which suggests the magnitude of pathogenic infections is presented.

Helminths of the Rocky Mountain bighorn sheep in Western Canada

1971 ◽  
Vol 49 (4) ◽  
pp. 507-512 ◽  
Author(s):  
Leslie S. Uhazy ◽  
John C. Holmes
Keyword(s):  
British Columbia ◽  
Relative Abundance ◽  
National Park ◽  
Rocky Mountain ◽  
Bighorn Sheep ◽  
Western Canada ◽  
Taenia Hydatigena ◽  
Fecal Samples ◽  
Marshallagia Marshalli ◽  
Moniezia Expansa

Thirty-six Rocky Mountain bighorn sheep (Ovis c. canadensis), 33 from four areas in Alberta and 3 from Kootenay National Park, British Columbia, were examined for helminths. Data from these examinations were supplemented by examination of 462 fecal samples from the same areas.Seventeen species of helminths were recovered: 3 cestodes, Moniezia expansa and Wyominia tetoni and the cysticerci of Taenia hydatigena; and 14 nematodes, Capillaria sp., Marshallagia marshalli, Nematodirus archari, N. davtiani, N. maculosus, N. oiratianus, N. spathiger, Ostertagia circumcincta, O. occidentalis, Protostrongylus rushi, P. stilesi, Skrjabinema ovis, Teladorsagia davtiani, and Trichuris ovis. The records of Capillaria sp., Nematodirus maculosus, and Teladorsagia davtiani are apparently the first from bighorn sheep. Nine other records are new for bighorn sheep in Canada.Total numbers of helminths (excluding lungworms) per bighorn ranged from 36 to 8345. There was little variation in the prevalence or the relative abundance of the different species in the areas sampled.

Archaeocyathids and the Lower Cambrian Continental Shelf of the Canadian Cordillera

1975 ◽  
Vol 12 (12) ◽  
pp. 2014-2020 ◽  
Author(s):  
C. R. Stelck ◽  
A. S. Hedinger
Keyword(s):  
British Columbia ◽  
Continental Shelf ◽  
Lower Cambrian ◽  
Rocky Mountain ◽  
Canadian Cordillera ◽  
Western Canada ◽  
Early Cambrian ◽  
Structural Trend ◽  
East And West

The geographic occurrences of archaeocyathids are plotted for the Cordilleran region of western Canada. The archaeocyathids are found both east and west of, and within the Rocky Mountain Trench in British Columbia and are found east and west of the Tintina Trench in the southern Yukon. The overall pattern of the occurrences indicates that the shallow neritic portion of the continental shelf in Early Cambrian time traces a pattern widely diverse from that of the later, superimposed, Laramide structural trend. Portions of the continental shelf were already in existence west of the Rocky Mountain Trench by Early Cambrian time.

Winter Burning Bighorn Sheep Range — A Proposed Strategy

1990 ◽  
Vol 66 (5) ◽  
pp. 473-477 ◽  
Author(s):  
Paul M. Woodard ◽  
Terry VanNest
Keyword(s):  
Rocky Mountain ◽  
Bighorn Sheep ◽  
Tree Cover ◽  
Gas Mixture ◽  
Ignition System ◽  
Winter Range ◽  
Crown Fires ◽  
Steep Slopes

It is suggested that prescribing crown fires in mature coniferous stands adjacent to escape terrain during the winter may be a cheap and effective way of maintaining or establishing winter range for Rocky Mountain bighorn sheep. The proposed strategy relies on surface fuels being frozen, high upslope winds, steep slopes, uniform and continuous tree cover, and a helitorch ignition system that uses some type of gel-gas mixture.

Westerly derived Early Cretaceous gold paleoplacers in the Western Canada foreland basin, southwestern Alberta: tectonic and economic implications

1995 ◽  
Vol 32 (8) ◽  
pp. 1079-1092 ◽  
Author(s):  
Dale A. Leckie ◽  
David Craw
Keyword(s):  
British Columbia ◽  
Early Cretaceous ◽  
Foreland Basin ◽  
Rocky Mountain ◽  
Low Grade ◽  
Western Canada ◽  
Gold Content ◽  
Economic Implications ◽  
Quartz Veins ◽  
Sedimentary Succession

Albian-aged (Early Cretaceous) igneous pebble to cobble conglomerates fill multiple, northeast–southwest-oriented, subparallel channels in the upper Blairmore Group (upper Beaver Mines and Mill Creek formations) of the Rocky Mountain foreland basin, southwestern Alberta and southeastern British Columbia. Paleocurrent data show that the conglomerate was derived from the west. Clast petrography implies a provenance that includes granitoids, mafic volcanics, low-grade metamorphic rocks, and shallow-level (ca. 7 km depth) postmetamorphic quartz veins formed from meteoric fluids. The conglomerate was probably derived from the southern Omineca Belt of British Columbia prior to the rise of the Rocky Mountains. The conglomerate contains detrital gold grains up to 150 μm in diameter, and chemical analyses indicate widespread anomalous gold concentrations (up to 910 ppb Au) in conglomerate matrix. Gold content in these igneous-clast conglomerates excèdes that reported from the richest modern placers in Alberta. Less pronounced but persistent As anomalies (up to 260 ppm) occur also. Postdepositional alteration of conglomerate matrix chemically mobilized Au and As from their detrital source grains and redistributed these elements. Gold enrichment in the igneous-clast conglomerate contrasts strongly with background gold concentrations in the underlying conglomeratic Cadomin Formation. The gold concentrations in the igneous-clast conglomerate demonstrate that paleoplacers derived from the Canadian Cordillera have accumulated in the Western Canada foreland basin, a sedimentary succession previously dismissed as a host for detrital gold.

The Occurrence of Cuterebra (Diptera, Oestridae) in Western Canada

Parasitology ◽  
1926 ◽  
Vol 18 (4) ◽  
pp. 430-435 ◽  
Author(s):  
Alfred E. Cameron
Keyword(s):  
British Columbia ◽  
Spotted Fever ◽  
Rocky Mountain ◽  
Careful Examination ◽  
Western Canada ◽  
Rocky Mountain Spotted Fever ◽  
Tamias Striatus ◽  
North West ◽  
North West Territories ◽  
Prevalent Species

Reference to the National Insect Collection at Ottawa shows that species of the genus Cuterebra have been collected in various localities of Western Canada at different times. Of these Cuterebra grisea Coq. is distributed throughout Manitoba, Saskatchewan, Alberta, North-West Territories and British Columbia. There is one record each of C. emasculator Fitch (determined by Aldrich as C. fontinella Clark), of which the locality is unknown, and of C. fasciata Swenk, from Peachland, British Columbia. The specimen of C. emasculator bears a note that it had been reared from a chipmunk, Tamias striatus lysteri Richardson. The remaining species, C. americana var. polita Coq., C. similis Johnson and C. tenebrosa Coq. have all been collected in British Columbia. There is but a single record from the Eastern Provinces and that a specimen of C. fasciata from Bathurst, New Brunswick, dated August, 1900. Altogether there are 22 specimens in the National Collection belonging to six species. Of these there are 11 specimens of C. grisea, which would thus appear to be the most prevalent species in Western Canada. The comparative paucity of specimens may be correctly attributed to the peculiarly shy habits of the species, the adults of which, according to information furnished me by Criddle, prefer rather dark situations, such as outbuildings, summer kitchens and the ground burrows of rodents. They occur on the wing from June to September and are probably to be found closely attendant upon the haunts of their rodent hosts. That the percentage of parasitism is not high is concluded from the fact that Parker and Wells (1919), in a careful examination of over a thousand rodents in Montana for possible infestation by the Rocky Mountain spotted fever tick, Dermacentor venustus Banks, found but two that were parasitised, each with one larva of C. tenebrosa.

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 Hydrogeochemistry and surface water quality assessment of IB valley coalfield area, India

2021 ◽  
Vol 11 (9) ◽  
Author(s):  
Bishnu Prasad Sahoo ◽  
Himanshu Bhushan Sahu ◽  
Dhruti Sundar Pradhan
Keyword(s):  
Water Quality ◽  
Heavy Metal ◽  
Seasonal Variation ◽  
Surface Water ◽  
Water Samples ◽  
Nickel Aluminum ◽  
Acid Mine ◽  
Significant Seasonal Variation ◽  
Cadmium Selenium ◽  
High Degree

AbstractCoal mining and ancillary activities have the potential to cause water pollution characterized by acid mine drainage, acid mine leachates, extreme pH conditions and heavy metal contaminations. In the present work, 33 water samples in premonsoon and 34 water samples in monsoon were collected from the surface water bodies of Ib Valley coalfield, India for hydrogeochemical analysis. In premonsoon, pH, TSS, Turbidity, DO, BOD, COD, Magnesium, Cadmium, Selenium, Nickel, Aluminum and in monsoon, pH, TSS, Turbidity, DO, BOD, COD, Iron, Cadmium, Selenium, Nickel and Aluminum were nonconforming to the permissible limit set by the Bureau of Indian Standards, World Health Organisation and Ministry of Environment, Forest and Climate Change, Government of India. The average BOD/COD ratio of less than 0.6 in both seasons indicated Ib valley coalfield water was not fairly biodegradable. The analysis of variance (ANOVA) revealed that significant seasonal variation (p < 0.05) was observed in the hydro-chemical parameters viz. TSS, turbidity, redox potential, acidity, total hardness, bicarbonate alkalinity, chloride, sulfate, nitrate, sodium, calcium, magnesium, iron, cadmium, chromium and magnesium during the entire sampling period. Whereas, no significant seasonal variation (p > 0.05) was observed in pH, EC, TDS, DO, BOD, residual chlorine, COD, oil and grease, fluoride, potassium, zinc, copper, selenium, nickel, aluminum, boron, silica, temperature, salinity, cyanide and phenol. Water Quality Index revealed that 39.39% and 35.29% samples belong to poor water quality category in premonsoon and monsoon, respectively. As per Heavy Metal Pollution Index, Degree of Contamination (Cd) and Heavy metal evaluation index, medium degree of pollution were exhibited by 51.52%, 30.30% and 45.45% samples in premonsoon and 20.59%, 35.29% and 26.47% samples in monsoon. Whereas, 5.88%, 2.94% and 5.88% samples were having high degree of pollution in monsoon and 15.15% samples caused high degree of pollution with respect to Cd in premonsoon. However, EC, Na%, PI, SAR and RSC values suggested that the water can be used for irrigation. Water type of the region had been found to be Ca–Mg–Cl–SO4 by Piper diagram.

Seasonal Variability in Middepth Gyral Circulation Patterns in the Central East/Japan Sea as Revealed by Long-Term Argo Data

2016 ◽  
Vol 46 (3) ◽  
pp. 937-946 ◽  
Author(s):  
Sok Kuh Kang ◽  
Young Ho Seung ◽  
Jong Jin Park ◽  
Jae-Hun Park ◽  
Jae Hak Lee ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Seasonal Variability ◽  
Japan Sea ◽  
Circulation Pattern ◽  
Japan Basin ◽  
Wind Stress Curl ◽  
Argo Data ◽  
Circulating Water ◽  
Significant Seasonal Variation ◽  
Water Columns

AbstractTrajectories of Argo floats deployed in the East/Japan Sea from 2001 to 2014 reveal that the middepth gyral circulation pattern of the Japan basin, the central part of the East/Japan Sea, undergoes a seasonal variation. The middepth circulation of the Japan basin is found to be characterized usually by the gyres trapped to the east of the Bogorov Rise (E-gyres) and those extending farther westward into the whole basin (BW-gyres). The E-gyre trajectories are generally associated with the turning of the floats toward deeper regions off the isobaths. This occurs in winter either on the northern or eastern side of the eastern Japan basin. It seems that the upstream part of the otherwise BW-gyre is subject to a strong negative wind stress curl in winter, and there the circulating water columns are driven toward the deeper region, thus triggering the formation of the E-gyre. The topographic effect associated with the Bogorov Rise seems to interfere thereafter in the process of determining the passage of the E-gyre. Otherwise, the water columns continue to flow along the isobaths, hence maintaining the BW-gyre. To the knowledge of the authors, this is the first observational evidence of seasonal variability in the middepth gyral circulation pattern in the East/Japan Sea. It suggests that oceanic middepth circulation, usually known to be quasi steady or slowly varying on climatological time scales, might also undergo a significant seasonal variation as it does in the East/Japan Sea.

Sign in / Sign up

Export Citation Format

Share Document