1,720,955 research outputs found
Stable isotope signatures and locations of Grizzly Bears (Ursus arctos) in British Columbia
No full textGrizzly Bear Isotope data from Van Elslander et al. 2025.
As a part of Van Elslander et al. 2025, we analyzed the stable isotope ratios of carbon and nitrogen in over 2500 guard hairs from 1804 grizzly bears (1059 males, 729 females, 16 sex unidentified) sampled from across B.C. Approximately 900 of these hairs were shared by other researchers who wish to keep their data private. The remaining 1621 samples are included here. 593 bears were analyzed specifically for this study at the University of Ottawa Ján Veizer Stable Isotope Laboratory. Samples from 567 bears from this study were collected as a part of B.C.’s Compulsory Inspection database, while the remaining 68 were collected as a part of DNA-based population inventories. The remaining data were provided by other researchers and had been previously analyzed for carbon and nitrogen stable isotope ratios. Most of these data were collected using non-invasive hair sampling and identified to sex and individual using genetic techniques. Analytical methods for data shared by other researchers are available in their associated publications. See README.txt for a full list of citations
1km resolution rasters of grizzly bear skull length (mm)
No full textMaps of grizzly bear skull size developed based on the data in the British Columbia's Compulsory Inspection database (url: https://catalogue.data.gov.bc.ca/dataset/45711667-7878-4d86-8b5e-d0be5997dd16). NAD83/BC Albers projectiong (EPSG: 3005). 1km resolution.
We considered the skull length (in millimetres) of all male bears in the database over the age of seven (n = 3451) and female bears above the age of 5 (n = 5871), ages by which they are thought to have reached their full size (Mowat and Heard 2006, url: doi.org/10.1139/z06-016). Using these data, we generated predicted maps of male and female skull size for the province by interpolating measured skull length using a simple kriging process based on a Gaussian variogram model with the R package gstat (Pebesma 2004, url: doi.org/10.1016/j.cageo.2004.03.012), generating a raster with 1km resolution
Spatial variation in grizzly bear diet across British Columbia
No full textDietary niche variation is a key facet of an animal’s niche and can be a driver of spatial variation
in behaviour, population dynamics, and sensitivity to anthropogenic threats. Spatial assessments
of the variation of an animal’s dietary niche helps provide key baseline knowledge for the
research and management of a species and are particularly important for species with large
geographic ranges and highly variable niches. Grizzly bears (Ursus arctos) are a wide-ranging
omnivorous mammal with enormous dietary flexibility and a species of concern in Canada. I
estimated the proportion of vegetation, terrestrial meat, anadromous salmon, and non-
anadromous kokanee salmon in the diet of over 1800 grizzly bears via stable isotope analyses of
over 2500 guard hair samples collected across the province of British Columbia. Using these
estimates, I created fine-scale maps of grizzly bear diet using a parametric generalized additive
mixed effects model with spatial random fields. The results of these predictive models showed
that spatial distribution of grizzly bear’s dietary niche in B.C. can be broadly categorized into
coastal areas where bears are reliant on salmon, and interior areas where they are reliant on plant
foods. Terrestrial meat sources and kokanee salmon provided important supplements to bear diet
in certain regions, but nowhere were they as important to bear diet as plants or salmon. These
results also showed that spatial variation in grizzly bear diet is not currently reflected in the
boundaries of B.C.’s Grizzly Bear Population Units, which represents a major obstacle to
effective management across the province.Science, Irving K. Barber Faculty of (Okanagan)Earth, Environmental and Geographic Sciences, Department of (Okanagan)Graduat
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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