1,721,031 research outputs found
FIGURES 1–2 in New species of cynipid inquiline, Saphonecrus kuriphilusi (Hymenoptera: Cynipidae: Synergini), from Dryocosmus kuriphilus galls in Greece
No full textFIGURES 1–2. Saphonecrus kuriphilusi, new species, female: 1, female, general view (rc, radial cell), 2, metasoma, dorsal view.Published as part of Melika, George, Memtsas, George I., Nicholls, James A. & Avtzis, Dimitrios N., 2018, New species of cynipid inquiline, Saphonecrus kuriphilusi (Hymenoptera: Cynipidae: Synergini), from Dryocosmus kuriphilus galls in Greece, pp. 109-120 in Zootaxa 4441 (1) on page 113, DOI: 10.11646/zootaxa.4441.1.6, http://zenodo.org/record/130193
FIGURES 21–28. 21–24 in New species of cynipid inquiline, Saphonecrus kuriphilusi (Hymenoptera: Cynipidae: Synergini), from Dryocosmus kuriphilus galls in Greece
No full textFIGURES 21–28. 21–24, Mesosoma, dorsal view, female: 21, Saphonecrus barbotini, 22, S. gallaepomiformis, 23, S. connatus, 24, S. symbioticus. 25–28, metasoma, lateral view, female: 25, Saphonecrus barbotini, 26, S. gallaepomiformis, 27, S. connatus, 28, S. symbioticus.Published as part of Melika, George, Memtsas, George I., Nicholls, James A. & Avtzis, Dimitrios N., 2018, New species of cynipid inquiline, Saphonecrus kuriphilusi (Hymenoptera: Cynipidae: Synergini), from Dryocosmus kuriphilus galls in Greece, pp. 109-120 in Zootaxa 4441 (1) on page 116, DOI: 10.11646/zootaxa.4441.1.6, http://zenodo.org/record/130193
FIGURES 3–8 in New species of cynipid inquiline, Saphonecrus kuriphilusi (Hymenoptera: Cynipidae: Synergini), from Dryocosmus kuriphilus galls in Greece
No full textFIGURES 3–8. Saphonecrus kuriphilusi, new species, female: 3–5, head: 3, frontal view, 4, dorsal view, 5, posterior view. 6, antenna. 7, mesosoma, dorsal view. 8, metascutellum and propodeum, posterodorsal view.Published as part of Melika, George, Memtsas, George I., Nicholls, James A. & Avtzis, Dimitrios N., 2018, New species of cynipid inquiline, Saphonecrus kuriphilusi (Hymenoptera: Cynipidae: Synergini), from Dryocosmus kuriphilus galls in Greece, pp. 109-120 in Zootaxa 4441 (1) on page 114, DOI: 10.11646/zootaxa.4441.1.6, http://zenodo.org/record/130193
Effective Defense of Aleppo Pine Against the Giant Scale Marchalina hellenica Through Ecophysiological and Metabolic Changes
No full textAleppo pine (Pinus halepensis) is widely distributed in the Mediterranean region and in other areas of the world, where it has been introduced due to its adaptive capacity to xerothermic conditions. The giant pine scale Marchalina hellenica often infests Aleppo pine, as well as other pines, in several southeastern European countries, causing pine declines. When combined with the expected intensified heat and drought events in eastern Mediterranean, the impact of this biotic parameter on the host pines may be exacerbated. The importance of understanding the defense mechanisms of Aleppo pine is emphasized by the recent invasion of the pine scale in new regions, like Australia, lacking the insect’s natural enemies, where more intense negative effects on pine species may occur. To date, Aleppo pine’s physiological responses to the infestation by M. hellenica are largely unknown. This study aimed at assessing the responses of Aleppo pine to the giant pine scale attack, both on an ecophysiological and a metabolic level. For this purpose, gas exchange, needle water status, and carbon and nitrogen content were measured during 1 year on healthy and infested adult trees. M etabolic profiling of Aleppo pine needles was also performed before, during, and after the high feeding activity of the insect. The maintenance of stable relative water content, δ13C signatures, and chlorophyll fluorescence in the needles of infested pines indicated that infestation did not induce drought stress to the host pines. At the peak of infestation, stomatal closure and a pronounced reduction in assimilation were observed and were associated with the accumulation of sugars in the needles, probably due to impaired phloem loading. At the end of the infestation period, tricarboxylic acids were induced and phenolic compounds were enhanced in the needles of infested pines. These metabolic responses, together with the recovery of photosynthesis after the end of M. hellenica intense feeding, indicate that in the studied region and under the current climate, Aleppo pine is resilient to the infestation by the giant pine scale. Future research should assess whether these promising defense mechanisms are also employed by other host pines, particularly in regions of the world recently invaded by the giant pine scale, as well as under more xerothermic regimes
Ormyrus Westwood 1832
No full textGenus <i>Ormyrus</i> Westwood, 1832 <p> <i>Ormyrus</i> Westwood, 1832: 127 (type species: <i>Ormyrus punctiger</i> (Westwood 1832: 127), by monotypy).</p> <p> <i>Siphonura</i> Nees, 1834: 81. (type species <i>Siphonura variolosa</i> (Nees 1834: 81), by subsequent designation of Gahan & Fagan (1923)). Synonymy by von Dalla Torre (1898): 282.</p> <p> <i>Periglyphus</i> Boheman, 1838: 378 (type species <i>Periglyphus gastris</i> (Boheman 1838: 378), by monotypy). Synonymy by von Dalla Torre (1898): 282.</p> <p> <i>Cyrtosoma</i> Perris, 1840: 96. (type species <i>Cyrtosoma papaveris</i> (Perris 1840: 96) by monotypy). Synonymy by Bouček (1988): 155.</p> <p> <i>Monobaeus</i> Förster, 1860: 95. Type species <i>Monobaeus cingulatus</i> (Förster 1860: 95) by subsequent designation by Ashmead (1904): 245. Synonymy by Bouček (1988): 155.</p> <p> <i>Tribaeus</i> Förster, 1860: 93. Type species <i>Tribaeus punctulatus</i> (Förster 1860: 93), by monotypy. Synonymy by Bouček (1988): 155.</p> <p> <i>Chrysoideus</i> De Stefani, 1898: 172. Type species <i>Torymus</i> (<i>Chrysoideus</i>) <i>chrysidiformis</i> (De Stefani 1898: 172), designated by Gahan & Fagan (1923): 34. Synonymy by Bouček (1988): 155.</p> <p> <i>Wania</i> Risbec, 1951: 294. Type species <i>Wania ornata</i> (Risbec 1951: 294), by monotypy. Synonymy by Risbec (1954): 535.</p> <p> <i>Avrasyamyrus</i> Doganlar, 1991: 7. Type species <i>Ormyrus orientalis</i> Walker, 1871, by original designation. Synonymy by Hanson (1992): 1335 –1336.</p>Published as part of <i>Koutsoukos, Evangelos, Compton, Stephen G., Noort, Simon van, Avtzis, Dimitrios N. & Askew, Richard R., 2024, A new species of Ormyrus Westwood (Hymenoptera, Ormyridae) developing in figs of Ficus microcarpa in Europe, pp. 170-193 in European Journal of Taxonomy 917</i> on page 174, DOI: 10.5852/ejt.2024.917.239
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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