1,720,956 research outputs found
Abomasal helmithofauna of roe deer (Capreolus capreolus capreolus) in the Julian Prealps and the anatomopathological aspects associated
No full textRoe deer is a great importance species in relation to wildlife management. Ecoparasitological analyses show that the abomasal parasitic burden and host body condition are closely related, but no information there is on tissue damage induced by abomasal helminthofauna.
Fifty-one roe deer shot during period 2004-2007 and coming from game reserves of Julian Prealps, were investigated for the presence of abomasal nematodes. Each abomasum was opened along the Curvatura major and the content was collected for parasitological exams. After photograph and macroscopic evaluation, abomasal standard samples (n. subjects 47) were collected for anatomopathological analysis. The helminth prevalence (P), mean intensity (MI), abundance (A), relative abundance (RA) of each parasite species were calculated.
Fifteen helminth species (as average 6 species/animal) were recovered in roe deer population: Teledorsagia circumcincta, T. davtiani, Spiculopteragia spiculoptera, S. mathevossiani, Ostertagia lyrata, O. trifurcata, O. leptospicularis, O. kolchida, O. ostertagi, Heamonchus contortus, Tricostrongylus capricola, T. vitrinus, T. colubriformis, T. axei, Nematodirus europeaus. S. spiculoptera (P= 100; A=286; RA=27.3) and O. leptospicularis (P=100; A=273; RA=26), associated to their alternative morphs S. mathevossiani (P=70.6; A=38; RA=3.6) and O. kolchida (P=88.2; A=87; RA=8.3), were the abomasal dominant species. Therefore, species composition was typical of this wild ruminant host in Europe. Between generalist species, H. contortus shows also a high prevalence and abundance (P=74.5; A=294; RA=28).
All the abomasums show histological defensive lesions of variable intensity. Attributing the single identified species to the anatomopathological patterns based on the abomasal multiparassitism in not simple. However the main epidemiological index applied to the different abomasitis forms will be discussed
A technique for the cryopreservation of trichostrongylid nematodes for morphological identification
No full textElmintofauna gastrointestinale in capriolo (Capreolus capreolus capreolus) delle Prealpi Giulie.
No full textHelminths from 51 roe deer (Capreolus capreolus) shot in the Julian Prealps during 2004-2007 were collected, of which 100% were positive for parasites. Gastrointestinal helminths were found in 100% of abomasums and caecum-colon and 90.5% of small intestines. The parasite community of this roe deer population shows good richness (23 species). Spicolopteragia spiculoptera and Ostertagia leptospicularis, with their alternative morphs S. mathevossiani and O. kolchida, were the abomasal dominant species, in the small intestine T. capricola and in caecum-colon Chabertia ovina. Between generalist species, Haemonchus contortus presents also a high prevalence and mean abundance (P=74.5; Am=294). The presence of several parasitic species shared by both domestic and wild ruminants and epidemiological indexes are discussed
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
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