1,720,957 research outputs found
Investigation of cyprinid herpes virus 3 (CyHV-3) disease periods and factors influencing CyHV-3 transmission in a low stocking density infection trial
No full textThis is a singe xcel file containing several tabs of disease trial data. Tab has a single row of header with sortable data below.Pathogens are the primary limitation to aquaculture production of fish and a major issue in consideration of the interface between cultured and wild populations of fishes worldwide. While rapid spread of fish pathogens between populations (wild or farmed) is generally anthropogenic and the result of trade, the mechanisms of transmission once a pathogen has been introduced to a fish population are not well understood. The most widespread pathogen impacting both aquaculture and wild populations of common carp (Cyprinus carpio, carp) is Cyprinid herpesvirus 3 (CyHV-3). To understand how CyHV-3 is transmitted in a population we conducted a series of infection trials, designed to determine the kinetics CyHV-3 infections, identify the contributions of direct and indirect forms of CyHV-3 transmission, and to determine the contributions of contact rate, viral load, pathogenicity, and contact type. We found that direct contact between fish was the primary mechanism of CyHV-3 transmission rather than transmission through contaminated water. Additionally, CyHV-3 transmission occurred primarily during the incubation period of CyHV-3, prior to the appearance of disease signs and disease-associated reduction in contact rate.This research was funded by the Environment and Natural Resource Trust Fund, as recom-mended by the Minnesota Aquatic Invasive Species Research Center, and state of MinnesotaTolo, Isaiah. (2021). Investigation of cyprinid herpes virus 3 (CyHV-3) disease periods and factors influencing CyHV-3 transmission in a low stocking density infection trial. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/xnyv-x176
Host range and disease dynamics of viral pathogens of common carp (Cyprinus carpio), and their potential as biological control agents
No full textUniversity of Minnesota Ph.D. dissertation. November 2022. Major: Conservation Biology. Advisor: Nicholas Phelps. 1 computer file (PDF); x, 176 pages.Common carp (Cyprinus carpio), hereafter referred to as carp, is a ubiquitous and destructive invasive fish in Minnesota and much of the world. There is a need for the development of species-specific, highly effective, and cost-efficient approaches for carp management that can be used across large scales. Pathogen biocontrol agents have previously been used in combination with conventional methods to control vertebrate pests at the landscape scale. Cyprinid herpesvirus 3 (CyHV-3; aka. Koi herpesvirus, KHV) and carp edema virus (CEV) are pathogens worthy of further investigation for carp biocontrol due to their host-specific pathogenicity. Both CyHV-3 and CEV are known to cause mass mortality events of carp and it is possible that carp populations can continue to decline after initial outbreaks. Despite the potential value of viruses as biocontrol agents, there are significant data gaps in the understanding of the distribution and disease ecology of carp-specific viruses in North America, a need for increased research capacity, as well as concern related to the risks of using microbial biological control agents in general. This dissertation is composed of research working to identify a safe and effective pathogenic biocontrol agent for carp. This work contributes to the understanding of the potential value of viral biocontrol of carp by identifying the distribution of CyHV-3 and CEV in Minnesota, obtaining a regional viral strain of CyHV-3 from a carp mortality event, assessing the host range and disease dynamics of these viruses, and by describing the natural ecology of CyHV-3 in laboratory disease trials and wild populations surveys.Tolo, Isaiah. (2022). Host range and disease dynamics of viral pathogens of common carp (Cyprinus carpio), and their potential as biological control agents. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/252357
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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