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Fig. 1 in On Sexual Dimorphism Of Karyotypes Of Viviparus Viviparus And V. Contectus (Gastropoda, Viviparidae)
No full textFig. 1. Mitotic methaphases (1) and caryotypes (2) of female (above) and mitotic methaphases (3) and caryotypes (4) of male (below) of V. viviparus. Рис. 1. Митотическая метафаза (1) и кариотип (2) самки (вверху); митотическая метафаза (3) и кариотип (4) самца (внизу) у V. viviparus.Published as part of Andriychuk, T. V. & Garbar, A. V., 2015, On Sexual Dimorphism Of Karyotypes Of Viviparus Viviparus And V. Contectus (Gastropoda, Viviparidae), pp. 105-112 in Vestnik Zoologii 49 (2) on page 107, DOI: 10.1515/vzoo-2015-0011, http://zenodo.org/record/641280
Karyotypes of european species of radix (Gastropoda: Pulmonata: Lymnaeidae) and their relevance to species distinction in the genus
No full textKaryotypes of Radix auricularia (Linnaeus, 1758) and three disputable taxa considered by
different authors as distinct species or assigned as forms of Radix peregra (Muller, 1774),
sensu lato - R. labiata (Rossmassler, 1835), R. balthica (Linnaeus, 1758), and R. ampla
(Hartmann, 1821) - were studied with preparations obtained from gonad tissues by the airdrying
method. The studied taxa have the same diploid number (2n = 34), but are characterized
by different morphology of some chromosome pairs. In particular, R. labiata (traditionally
identified as R. peregra, s. s.) and R. balthica (= R. ovata in traditional understanding) differ
in the number of subtelocentric chromosomes (1 and 5, respectively), species status of
these taxa being also supported by pronounced differences in centomeric indexes of chromosome
pairs 4 and 16. Species distinctness of R. ampla is supported by differences in
three chromosome pairs, and karyological similarity between this taxon and R. balthica is
also noted. FN values varied among the studied taxa from 56 in R. ampla to 66 in R. labiata.
The known karyological characters are traced on phylogenetic trees suggested by recent
molecular reconstructions. This study demonstrates that karyology can be an effective tool
for aiding taxonomic distinctions of historically problematic groups of molluscs
On Sexual Dimorphism of Karyotypes of Viviparus Viviparus and V. Contectus (Gastropoda, Viviparidae)
No full textOn Sexual Dimorphism of Karyotypes of Viviparus viviparus and V. contectus (Gastropoda, Viviparidae). Andriichuk, T. V., Garbar, A. V. — Karyotype analysis of males and females of two Viviparid species Viviparus viviparus Linnaeus, 1758 and V. contectus (Millet, 1813), shows diff erences
in their karyotypes in the absence of heteromorphic pairs of chromosomes. Th is indicates an epigamous
mechanism of sex determination
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
Fig. 1 in The Thick-Clawed Crayfish, Astacus Pachypus (Crustacea, Decapoda, Astacidae), In Ukraine: Karyotype, Allozymes And Morphological Parameters
No full textFig. 1. Locations of samples of four crayfish species in Ukraine.Published as part of Mezhzherin, S. V., Kostyuk, V. S., Garbar, A. V., Zhalai, E. I . & Kutishchev, P. S., 2015, The Thick-Clawed Crayfish, Astacus Pachypus (Crustacea, Decapoda, Astacidae), In Ukraine: Karyotype, Allozymes And Morphological Parameters, pp. 41-48 in Vestnik Zoologii 49 (1) on page 42, DOI: 10.1515/vzoo-2015-0004, http://zenodo.org/record/645216
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
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