Wyniki wyszukiwania

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The influence of residual tree patch isolation on habitat use by bats in central British Columbia

100%

Swystun M. B., Psyllakis J. M., Brigham R. M.

Acta Chiropterologica

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2001

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tom 03

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nr 2

One forest management practice associated with logging aimed at contributing to the maintenance of biodiversity is to leave residual tree patches within cut blocks. Using Anabat bat-detectors we monitored bat activity along residual tree patch edges and clear-cut edges associated with recent clear-cuts in north-central British Columbia. We tested two hypotheses, (1) relative bat activity would be higher on the clear-cut edge than the residual patch edge, (2) relative bat activity would decrease on the residual patch edge with increasing isolation from the clear-cut edge. We sampled six pairs of edges and found no significant difference in bat activity between patch and clear-cut edges. We found a significant but non-linear relationship between relative bat activity on the patch edge with increasing patch isolation. Bat activity on the residual patch edge was highest at intermediate levels of patch isolation and lower both at patch edges close to, and highly isolated from the clear-cut edge. We postulate that the reason for this relationship is that patches act as windbreaks collecting high densities of insects making them good foraging areas but this benefit is coupled with an increased risk of prédation associated with crossing large gaps. At low levels of patch isolation bats may perceive residual patches and adjacent clear-cut edges as a continuous foraging area and thus, bat activity is evenly distributed throughout both habitats. In summary, our data indicate that patches provide localized habitat for foraging bats, however, foraging areas are only one habitat component required by bats and it remains uncertain if patches also offer suitable roosting opportunities.

2

Kurczy sie producent w Kolumbii Brytyjskiej

84%

W K.

Biuletyn Informacyjny Ośrodka Badawczo-Rozwojowego Przemysłu Płyt Drewnopochodnych w Czarnej Wodzie

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1997

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tom 38

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nr 3

154

3

Ultrastructure of the microsporidium, Duboscqia legeri, the type species of the genus Duboscqia Perez, 1908

84%

Weiser J., Belton P., Zizka Z., Holusa J.

Acta Protozoologica

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2010

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tom 49

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nr 2

125-131

4

Estimating temporary emigration rates with supplementary information: an example with Harlequin Ducks

84%

Robertson G. J., Cooke F., Goudie R. I., Boyd W. S.

The Ring

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1997

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tom 19

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nr 1-2

5

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Beta[1-3]-glucan exposure levels among workers in four British Columbia sawmills

84%

Ronald L. A., Davies H. W., Bartlett K. H., Kennedy S. M., Teschke K., Spithoven J., Dennekamp M., Demers P. A.

Annals of Agricultural and Environmental Medicine

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2003

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tom 10

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nr 1

B(1→3)-glucans were extracted from wood dust samples taken during the summer of 1997 at four British Columbia sawmills. Personal dust samples were collected using a GSP-sampler for inhalable dust and the sampling strategy targeted all production and maintenance jobs at least once at each mill. Potential exposure determinants data were documented concurrently, including weather conditions, log storage methods, wood conditions, species, production level, jobs and tasks. B(1→3)-glucans were measured by enzyme inhibition immunoassay (EIA). A total of 223 personal B(1→3)-glucan samples were analyzed. 45.7% were below the limit of detection (LOD). Geometric mean concentration ranged from 3.5 to 18.9 µg/m3 across the four mills. The highest levels were measured at the Interior mills, particularly in the log processing and sawmill areas. Multivariate regression models indicated that land-based log storage, clean-up jobs, high wood dust concentration, lumber yard department and the interaction between land-based log storage method and log processing department were associated with increased B(1→3)-glucan concentration.

6

The impact of prenatal diagnosis on neural tube defect [NTD] pregnancy versus birth incidence in British Columbia

84%

Van A. M. I., Boyle E., Thiessen P., McFadden D., Cochrane D., Chambers G. K., Langlois S., Stathers P., Irwin B., Cairns E., MacLeod P., Delisle M. F., Uh S. H.

Journal of Applied Genetics

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2006

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tom 47

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nr 2

The birth incidence of neural tube defect (NTD) cases in British Columbia (B.C.), and elsewhere in North America, is reported to be declining. This decline is being attributed to folic acid (FA) supplementation and food fortification, but 2nd trimester prenatal screening of pregnancies for NTDs and other congenital anomalies has increased during this timeframe, as well. This descriptive, population-based study evaluates the impact of prenatal screening of NTD-affected pregnancies on (1) pregnancy outcome and (2) reporting of NTD births to the provincial Health Status Registry (B.C.H.S.R.); and it assesses (3) the use of periconceptional FA supplementation. NTD cases were ascertained from medical records of health centres providing care to families with NTD-affected pregnancies and newborns; and from NTD cases reported to the B.C.H.S.R. In 1997-1999, the B.C.H.S.R. published a NTD incidence of 0.77/1000. In this study, 151 NTD-affected pregnancies were identified, with an incidence of 1.16/1000. Partial Reporting of induced abortions in a NTD incidence 45.5% low than the actual incidence. Medical records were available for review on 144/151 pregnancies. Prenatal screening identified 86.1% (124/144) of NTD-affected pregnancies, with 72.6% (90/124) resulting in pregnancy termination, and 27.4% (34/124) continuing to term. Use of FA supplementation in the periconceptional period was recorded in 36.4% of pregnancies (39/107). Thus in B.C. the decline in the NTD incidence is due predominantly to pregnancy terminations following prenatal diagnosis, which reduces the NTD incidence by 60%, from 1.16/1000 to 0.47/1000. Continued efforts for primary and the option of secondary prevention of NTDs are recommended in order to improve newborn health in B.C. and elsewhere. These interventions need to be monitored, however, for optimal health care planning.

7

Pseudopecoelus mccauleyi n. sp. and Podocotyle sp. (Digenea: Opecoelidae) from the deep waters off Oregon and British Columbia with an updated key to the species of Pseudopecoelus von Wicklen, 1946 and checklist of parasites from Lycodes cortezianus (Perciformes: Zoarcidae)

67%

Blend C. K., Dronen N. O., Racz G. R., Gardner S. L.

Acta Parasitologica

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2017

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tom 62

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nr 2

8

Soft-part preservation in two species of the arthropod Isoxys from the middle Cambrian Burgess Shale of British Columbia, Canada

67%

Garcia-Bellido D. C., Vannier J., Collins D.

Acta Palaeontologica Polonica

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2009

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tom 54

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nr 4

More than forty specimens from the middle Cambrian Burgess Shale reveal the detailed anatomy of Isoxys, a worldwide distributed bivalved arthropod represented here by two species, namely Isoxys acutangulus and Isoxys longissimus. I. acutangulus had a non−mineralized headshield with lateral pleural folds (= “valves” of previous authors) that covered the animal’s body almost entirely, large frontal spherical eyes and a pair of uniramous prehensile appendages bearing stout spiny outgrowths along their anterior margins. The 13 following appendages had a uniform biramous design—i.e., a short endopod and a paddle−like exopod fringed with marginal setae with a probable natatory function. The trunk ended with a flap−like telson that protruded beyond the posterior margin of the headshield. The gut of I. acutangulus was tube−like, running from mouth to telson, and was flanked with numerous 3D−preserved bulbous, paired features interpreted as digestive glands. The appendage design of I. acutangulus indicates that the animal was a swimmer and a visual predator living off−bottom. The general anatomy of Isoxys longissimus was similar to that of I. acutangulus although less information is available on the exact shape of its appendages and visual organs. I. longissimus is characterized by extremely long anterior and posterior spines. There are now seven Isoxys species known with soft−part preservation, I. acutangulus, I. longissimus from the Burgess Shale, I. auritus and I. curvirostratus from the Maotianshan Shale of China, I. communis and I. glaessneri from the Emu Bay Shale of Australia and I. volucrisfrom Sirius Passet in Greenland. The frontal appendages of Isoxys strongly resemble those of other Cambrian arthropods, characterized by a single pair of “great appendages” with a shared prehensile function yet some variability in length and shape.

9

Endotoxin exposure among softwood lumber mill workers in the Canadian Province of British Columbia

67%

Dennekamp M., Demers P. A., Bartlett K., Davies H. W., Teschke K.

Annals of Agricultural and Environmental Medicine

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1999

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tom 06

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nr 2

10

Zostaly pobite rekordy przy uzyciu luszczarki Coe

59%

W K.

Biuletyn Informacyjny Ośrodka Badawczo-Rozwojowego Przemysłu Płyt Drewnopochodnych w Czarnej Wodzie

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1996

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tom 37

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nr 4

320

Ograniczanie wyników

The influence of residual tree patch isolation on habitat use by bats in central British Columbia

Kurczy sie producent w Kolumbii Brytyjskiej

Ultrastructure of the microsporidium, Duboscqia legeri, the type species of the genus Duboscqia Perez, 1908

Estimating temporary emigration rates with supplementary information: an example with Harlequin Ducks

Beta[1-3]-glucan exposure levels among workers in four British Columbia sawmills

The impact of prenatal diagnosis on neural tube defect [NTD] pregnancy versus birth incidence in British Columbia

Pseudopecoelus mccauleyi n. sp. and Podocotyle sp. (Digenea: Opecoelidae) from the deep waters off Oregon and British Columbia with an updated key to the species of Pseudopecoelus von Wicklen, 1946 and checklist of parasites from Lycodes cortezianus (Perciformes: Zoarcidae)

Soft-part preservation in two species of the arthropod Isoxys from the middle Cambrian Burgess Shale of British Columbia, Canada

Endotoxin exposure among softwood lumber mill workers in the Canadian Province of British Columbia

Zostaly pobite rekordy przy uzyciu luszczarki Coe