1,720,955 research outputs found
Replication Data for: Ecological implications of the pink salmon invasion in northern Norway - aggregative responses and terrestrial transfer by white-tailed eagles
No full textThe dataset is from an observational study conducted along Skallelv, a sub-arctic river system on the east coast of the Varanger Peninsula in Norway.
Data on white-tailed eagle (Haliaeetus albicilla) abundances and pink salmon abundances and demographic stages were collected in two consecutive seasons using respectively, line transect counts and drift counts along Skallelv from July 1st to September 5th in 2021 and 2022. The associated R script has been used to analyse the data to evaluate whether there was an association between the pink salmon and white-tailed eagle abundances and produce figures that present the data with respect to such patterns as published in the article: Bonde, BM & Stien A. 2024. Ecological implications of the pink salmon invasion in northern Norway - aggregative responses and terrestrial transfer by white-tailed eagles. Ecology and Evolution. https://doi.org/10.1002/ece3.7000
Aggregative response in white-tailed eagles- an initial study of the terrestrial implications of invasive Pacific pink salmons (Oncorhynchus gorbuscha) in northern Norway.
Get PDFAbstract
The spawning population of invasive Pacific pink salmon (Oncorhynchus gorbuscha) has only continued to increase in the river systems on the Varanger peninsula in Norway, causing concerns across institutional boundaries and management communities. So far, the Norwegian research efforts on Pacific pink salmon have been centred on consequential effects in marine- and freshwater ecosystems, while terrestrial ecosystems have received less attention from both the scientific- and management community. The trophic linkage of riverine- and terrestrial ecosystems is likely to be the key determinant of transfers of marine-derived resources through Pacific pink salmon. This thesis shed light on how marine-derived resources became available to the wider scavenger community through white-tailed eagles (Haliaeetus albicilla). Data materials were collected at Skallelv on the Varanger peninsula in Norway from July 1st to September 5th in 2021 and 2022. I find that the relative abundance of white-tailed eagles was indeed much higher when Pacific pink salmon spawned in Skallelv in 2021 than in 2022, when no spawning occurred. The spatiotemporal synchrony of white-tailed eagles and Pacific pink salmon was observed at several scales, suggesting an aggregational response on part of the highly mobile white-tailed eagle. The aggregation of white-tailed eagles corresponded to the time that an increasing number of Pacific pink salmon had entered the post-spawning stage.
This study has identified the white-tailed eagle as a key driver in the cross-boundary transfer of marine-derived resources from invasive Pacific pink salmon spawning in river systems on the Varanger peninsula in Norway. The white-tailed eagle temporary extended the food supply for the wider community of scavenger, also after post-spawners were naturally contributing to the carcass pool as most were submerged and remained unavailable to terrestrial scavengers. A main aspect of my observations is the suggested importance of white-tailed eagle. This is presented in a model for the cross-boundary transfers of marine-derived energy, nutrients, and organic matter from the Pacific pink salmon that spawns in our northern river systems.
Keywords: Terrestrial, riparian, riverine, trophic linkages, cross-ecosystem boundary transfers, carcass-derived resources, scavenger community, Varanger, Norway, white-tailed eagle, Pacific pink salmon
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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