1,721,163 research outputs found
Aphanius iberus
No full textAphanius iberus “Adra” population (Almeria, Spain) (MNCN 170799-170819)Published as part of José L. Blanco, Tomas Hrbek & Ignacio Doadrio, 2006, A new species of the genus Aphanius (Nardo, 1832) (Actinopterygii, Cyprinodontidae) from Algeria., pp. 39-53 in Zootaxa 1158 on page 4
Aphanius baeticus
No full textAphanius baeticus from “Arroyo Salado” (Sevilla, Spain) (MNCN 170692-170712)Published as part of José L. Blanco, Tomas Hrbek & Ignacio Doadrio, 2006, A new species of the genus Aphanius (Nardo, 1832) (Actinopterygii, Cyprinodontidae) from Algeria., pp. 39-53 in Zootaxa 1158 on page 4
Biographical sketches of Iberoamerican Ichthyology: Ignacio Doadrio Villarejo.
No full textA través de esta nueva serie tratamos de conocer diferentes aspectos personales de los integrantes de la comunidad ictiológica iberoamericana.Esta iniciativa, comparte el espíritu y objetivo de las semblanzas nacionales buscando informalmente, otro punto de unión en la “comunidad de ictiólogos iberoamericanos”. Quizás esté equivocado en mi apreciación, pero creo que vale la pena este intento, ya que, con la colaboración generosa e insoslayable de los integrantes de este “universo”, señalaremos un registro en el tiempo de la Ictiología Neotropical.Facultad de Ciencias Naturales y Museo, UNLPProBiota: Programa para el estudio y uso sustentable de la biota australDebe citarse:
López, H. L. & J. Ponte Gómez. 2014. Semblanzas Ictiológicas Iberoamericanas: Ignacio Doadrio Villarejo. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 24(13): 1 15. ISSN 1515 9329
Mitochondrial phylogeography of the killifish Aphanius fasciatus (Teleostei, Cyprinodontidae) reveals highly divergent Mediterranean populations
No full text
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
Aphanius Nardo
No full text[[Aphanius Nardo]] The genus Aphanius is currently composed of approximately 16 species, and is distributed along the ancient coast of the Tethys Sea (Kosswig, 1967, Villwock, 1999), which closed at the Oligocene/Miocene boundary (Smith et al, 1995); this area includes both coastal and interior bodies of water in the Mediterranean basin and the Persian Gulf as far as Iran and Pakistan (Kessel & Zee, 1984, Wildekamp, 1993). The greatest species diversity is considered to be in the Near East, especially in Anatolia (Wildekamp et al, 1999), although recent studies suggest that this high diversity should also include Iran (Coad, 2000, Hrbek et al, in press). Diversity is lower in western parts of the range of the genus, where only four species are found: Aphanius apodus (Gervais, 1853), Aphanius baeticus Doadrio, Carmona and Fernandez-Delgado, 2002, Aphanius iberus (Valenciennes, 1846), and Aphanius fasciatus (Valenciennes, 1821). Genetically, Aphanius is divided into two major clades (eastern and western) (Hrbek & Meyer, 2003). All four species in the western Mediterranean region are members of the western clade, within which three lineages may be defined. Aphanius apodus was the earliest monotypic lineage to diverge from other members of the western Aphanius clade, whereas Aphanius fasciatus has a relatively nested position within the western Aphanius clade. The next lineage after Aphanius apodus to diverge from remaining western-clade Aphanius is the clade comprising Aphanius iberus, A. baeticus, and the new species described in the present study. Until recently this lineage was considered to be monotypic. However, molecular (Perdices et al, 2001, Hrbek & Meyer, 2003) and morphological (Doadrio et al, 2002) data clearly define two groups showing allopatric distributions, which support the hypothesis that they represent two distinct species, Aphanius iberus and Aphanius baeticus (Doadrio et al, 2002). The species with the broadest distribution, Aphanius iberus, historically occurred in southern France and along the Mediterranean coast of Spain; populations considered to be this species were also known from Morocco and Algeria (Pellegrin, 1921, Kessel & Zee, 1984, Wildekamp, 1993, Doadrio, 1994, Villwock, 1999). Aphanius iberus is currently extant only in remnant populations in Spain. Many North African records are historical and possibly imprecise, since this species does not presently occur in these areas or is known to have become extinct. Other North African literature records are based on second-hand information or lack precise collection or locality data, and thus are highly questionable. One North African population for which good geographic data exists, the Igli population, has been studied by Villwock & Scholl (1982). Those authors found morphological differences and differences in reproductive biology when compared to Spanish populations of A. iberus and A. baeticus. The absence of new material collected from northern Africa since Dumont’s (1980) and Morgan’s (1981) collections, which are deposited at the Musée Royal de l’Afrique Centrale, Tervuren, Belgium (MRAC), has impeded further studies, including the use of new taxonomic tools such as molecular techniques. Lack of material has not resulted from lack of interest or lack of effort. Rather, adverse political conditions and extensive anthropogenically-induced environmental and faunal changes, with attendant habitat degradation, have impeded collection efforts. However, during an expedition to Algeria in 2004, new material of Aphanius from an oasis system to which Igli is connected (Fig. 2) was collected. This material forms the basis for the current study.Published as part of José L. Blanco, Tomas Hrbek & Ignacio Doadrio, 2006, A new species of the genus Aphanius (Nardo, 1832) (Actinopterygii, Cyprinodontidae) from Algeria., pp. 39-53 in Zootaxa 1158 on page 4
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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