1,720,962 research outputs found
Taxonomic revision of south-eastern Australian giant burrowing frogs (Anura: Limnodynastidae: Heleioporus Gray)
No full textMahony, Michael J., Penman, Trent, Bertozzi, Terry, Lemckert, Frank, Bilney, Rohan, Donnellan, Stephen C. (2021): Taxonomic revision of south-eastern Australian giant burrowing frogs (Anura: Limnodynastidae: Heleioporus Gray). Zootaxa 5016 (4): 451-489, DOI: 10.11646/zootaxa.5016.4.
FIGURE 11 in Taxonomic revision of south-eastern Australian giant burrowing frogs (Anura: Limnodynastidae: Heleioporus Gray)
No full textFIGURE 11. Dominant frequency (DF) and mean 5% and 95% frequency levels for 13 locations plotted against latitude in eastern Australian Heleioporus. Locality code numbers are indicated (see Supplementary Table S4)Published as part of Mahony, Michael J., Penman, Trent, Bertozzi, Terry, Lemckert, Frank, Bilney, Rohan & Donnellan, Stephen C., 2021, Taxonomic revision of south-eastern Australian giant burrowing frogs (Anura: Limnodynastidae: Heleioporus Gray), pp. 451-489 in Zootaxa 5016 (4) on page 473, DOI: 10.11646/zootaxa.5016.4.1, http://zenodo.org/record/522241
FIGURE 2 in Taxonomic revision of south-eastern Australian giant burrowing frogs (Anura: Limnodynastidae: Heleioporus Gray)
No full textFIGURE 2. ML tree of relationships among Heleioporus mitochondrial ND4 nucleotide sequences from eastern Australian Heleioporus with ML bootstrap proportions and Bayesian posterior probabilities at nodes. Terminal taxa of eastern Heleioporus are numbered with locality codes in Table 1.Published as part of Mahony, Michael J., Penman, Trent, Bertozzi, Terry, Lemckert, Frank, Bilney, Rohan & Donnellan, Stephen C., 2021, Taxonomic revision of south-eastern Australian giant burrowing frogs (Anura: Limnodynastidae: Heleioporus Gray), pp. 451-489 in Zootaxa 5016 (4) on page 461, DOI: 10.11646/zootaxa.5016.4.1, http://zenodo.org/record/522241
Heleioporus australiacus
No full textHeleioporus australiacus (Shaw & Nodder, 1795) Diagnosis. Assigned to Heleioporus based on the generic definition of Lee (1967) and molecular phylogenetic evidence (Morgan et al. 2007). Eastern Australian Heleioporus are phylogenetically quite distant from their western Australian congeners with divergence estimated in the late Oligocene to early Miocene (Morgan et al. 2007). Eastern Australian Heleioporus are readily diagnosed morphologically from their western congeners by the presence of black spines capping the tubercles on the dorsum, sides, and throat, and the uniform chocolate dorsum with yellow or white spots restricted to the sides separating H. australiacus from all other species of Heleioporus except H. barycragus. The length of the metatarsal tubercle distinguishes H. australiacus (less than one half the length of the fourth toe) from H. barycragus (at least one-half the length of the fourth toe) (Lee 1967). The advertisement calls of H. barycragus consist of a single note compared with multi-pulses in eastern Heleioporus (FrogID application). Contra to Lee (1967), the number and distribution of the pre-orbital papillae in the anterior corner of the eye is quite variable in H. australiacus (Fig. 8) and includes exemplars that closely resemble the condition in H. barycragus illustrated in Figure 5 of Lee (1967). Heleioporus australiacus comprises two sub-species- H. a. australiacus new combination and H. a. flavopunctatus subsp. nov. which closely resemble each other in most morphological features but can be diagnosed from each other by two features in combination as follows. In H. a. australiacus the tubercles on the flanks have small central white- and yellow-coloured spots which rarely cover the entire tubercle or coalesce with adjacent spots; yellow or white spots occur on the raised tubercles surrounding the cloaca, but they do not coalesce to form a complete ring. In H. a. flavopunctatus tubercles on the flanks have cream and yellow-coloured spots that coalesce with adjacent spots; yellow or white spots on raised tubercles coalesce to from an almost complete ring surrounding the cloaca. Higher mean number of pulses of the note in the advertisement call of H. a. flavopunctatus. Apomorphic character states for at least 16 nucleotide sites in the mitochondrial ND4 gene diagnose the two taxa (Table 2).Published as part of Mahony, Michael J., Penman, Trent, Bertozzi, Terry, Lemckert, Frank, Bilney, Rohan & Donnellan, Stephen C., 2021, Taxonomic revision of south-eastern Australian giant burrowing frogs (Anura: Limnodynastidae: Heleioporus Gray), pp. 451-489 in Zootaxa 5016 (4) on page 475, DOI: 10.11646/zootaxa.5016.4.1, http://zenodo.org/record/522241
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
Observations of giant burrowing frogs \u27Heleioporus australiacus\u27 (Limnodynastidae) in the Mitchell River catchment, East Gippsland, Victoria
No full textVolume: 132Start Page: 128End Page: 13
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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