1,721,014 research outputs found
Figure 4 in Development, phylogeny, and taxonomy of Bostrycapulus (Caenogastropoda: Calyptraeidae), an ancient cryptic radiation
No full textFigure 4. Unrooted haplotype network of COI sequences from Bostrycapulus calyptraeformis. Slashes on branches show the number of differences between the haplotypes. Branches without slashes have a length of one. Size of the circles represent the number of individuals with that haplotype.Published as part of Collin, Rachel, 2005, Development, phylogeny, and taxonomy of Bostrycapulus (Caenogastropoda: Calyptraeidae), an ancient cryptic radiation, pp. 75-101 in Zoological Journal of the Linnean Society 144 (1) on page 83, DOI: 10.1111/j.1096-3642.2005.00162.x, http://zenodo.org/record/543349
Figure 2 in Development, phylogeny, and taxonomy of Bostrycapulus (Caenogastropoda: Calyptraeidae), an ancient cryptic radiation
No full textFigure 2. The Bayesian best estimate topology of the phylogeny of Bostrycapulus based on COI. Numbers above the branches represent bootstrap percentages and those below the branches are Bayesian support. Branches are labelled with the collecting locality and the individual code. * = type individual.Published as part of Collin, Rachel, 2005, Development, phylogeny, and taxonomy of Bostrycapulus (Caenogastropoda: Calyptraeidae), an ancient cryptic radiation, pp. 75-101 in Zoological Journal of the Linnean Society 144 (1) on page 81, DOI: 10.1111/j.1096-3642.2005.00162.x, http://zenodo.org/record/543349
Figure 7 in Development, phylogeny, and taxonomy of Bostrycapulus (Caenogastropoda: Calyptraeidae), an ancient cryptic radiation
No full textFigure 7. Embryos of Bostrycapulus urraca sp. nov. A, early postgastrula stage where the embryo is covered with a thin ciliated epithelium. B, mid-veliger stage, showing the granulated shell sculpture, the operculum behind the well-developed foot, the single embryonic kidneys and the reduced velum. C, Hatching stage, showing the well-developed shell sculpture. Scale bar = 150 Mm.Published as part of Collin, Rachel, 2005, Development, phylogeny, and taxonomy of Bostrycapulus (Caenogastropoda: Calyptraeidae), an ancient cryptic radiation, pp. 75-101 in Zoological Journal of the Linnean Society 144 (1) on page 85, DOI: 10.1111/j.1096-3642.2005.00162.x, http://zenodo.org/record/543349
Protandric simultaneous hermaphroditism and sex ratio in Lysmata nayaritensis Wicksten, 2000 (Decapoda: Caridea)
No full textBaeza, Juan Antonio, Reitz, Jennifer M., Collin, Rachel (2007): Protandric simultaneous hermaphroditism and sex ratio in Lysmata nayaritensis Wicksten, 2000 (Decapoda: Caridea). Journal of Natural History 41 (45-48): 2843-2850, DOI: 10.1080/00222930701770778, URL: http://dx.doi.org/10.1080/0022293070177077
Figure 5. Protoconchs. A in Development, phylogeny, and taxonomy of Bostrycapulus (Caenogastropoda: Calyptraeidae), an ancient cryptic radiation
No full textFigure 5. Protoconchs. A, Bostrycapulus pritzkeri sp. nov. from Sydney. B, B. calyptraeformis from the Perlas Islands, Panama. C, B. cf. tegulicia from Cape Verde. D, B. gravispinosus from Minabe, Wakayama Prefecture, Japan. E, B. calyptraeformis from Paita, Peru. F, B. odities sp. nov. from Playa Orengo, Argentina. G, B. urraca sp. nov. from Isla Parida, Panama. H, B. aculeatus from Lido Key, Florida. I, B. odites sp. nov. from São Paulo, Brazil. All are to the same scale. Scale bar = 500 Mm.Published as part of Collin, Rachel, 2005, Development, phylogeny, and taxonomy of Bostrycapulus (Caenogastropoda: Calyptraeidae), an ancient cryptic radiation, pp. 75-101 in Zoological Journal of the Linnean Society 144 (1) on page 84, DOI: 10.1111/j.1096-3642.2005.00162.x, http://zenodo.org/record/543349
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
Bostrycapulus urraca Collin 2005, SP. NOV.
No full textBOSTRYCAPULUS URRACA SP. NOV. <p> <i>Holotype:</i> ANSP 412178. Figure 11D; length = 15.4 mm, width = 13.1 mm, height = 5.7 mm.</p> <p> <i>Paratypes:</i> ANSP 412179 (two animals from the type locality).</p> <p> <i>Type locality:</i> Isla Parida, Gulf of Chiriqui, Panama. 8∞5.458¢N, 82∞18.671¢W</p> <p> <i>Other live material from</i> <i>type locality:</i> Isla Parida, Gulf of Chiriqui, Panama; FMNH 306483.</p> <p> <i>Diagnosis: B. urraca</i> can be distinguished from other species of <i>Bostrycapulus</i> by a combination of the following. It has a large globose protoconch and direct development that retains most of the larval features. Diagnostic DNA sequence differences distinguishing <i>B. urraca</i> from all other <i>Bostrycapulus</i> species are in the following positions in the COI sequences submitted to GenBank (position 1 = position 1537 of the <i>D. yakuba</i> mitochondrial genome, GenBank # X03240): 261 (t), 285 (g), 309 (g), 375 (t), 474 (c), 495 (a), 588 (t).</p> <p> <i>Distribution:</i> material whose identity has be verified as <i>B. urraca</i> has been collected in Panama from the Gulf of Chiriqui, Isla Coiba, the Azuero Peninsula, and the Perlas Archipelago. In El Salvador it has been collected from the Gulf of Fonseca. This species occurs from the intertidal zone to at least 50 m and can occur in densities up to several hundred per square meter in the intertidal zone.</p> <p> <i>Description:</i> shell morphology and anatomy are the same as <i>B. aculeatus</i>. Although <i>B. urraca</i> often has more distinct spination than the other species of <i>Bostrycapulus</i>, sequences of particularly spiny and smooth animals from the Gulf of Chiriqui and Bay of Panama showed that this is intraspecific variation and cannot be used to distinguish between these two species. This species has direct development from eggs with a diameter of 360 Mm (SD = 7.2; <i>N</i> = 57) and with a hatching size of 888 Mm (SD = 70, <i>N</i> = 75). The embryos develop and coiled shell, an operculum and paired embryonic kidneys (Fig. 7). The velum is limited to a ring of ciliated cells around the head and does not have a well-defined food-groove (Fig. 7).</p> <p> <i>Etymology:</i> The species name <i>urraca</i> is a noun in apposition. The name honours the R / V Urraca, the Smithsonian Tropical Research Institute’s research vessel, which was used to collect samples of this species. Urraca was the name of a Guaymi chief who fought bravely against the Spanish in Panama.</p>Published as part of <i>Collin, Rachel, 2005, Development, phylogeny, and taxonomy of Bostrycapulus (Caenogastropoda: Calyptraeidae), an ancient cryptic radiation, pp. 75-101 in Zoological Journal of the Linnean Society 144 (1)</i> on page 98, DOI: 10.1111/j.1096-3642.2005.00162.x, <a href="http://zenodo.org/record/5433494">http://zenodo.org/record/5433494</a>
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