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Rossellinae
No full textSubfamily Rossellinae Schulze, 1885Published as part of Kahn, Amanda S., Geller, Jonathan B., Reiswig, Henry M. & Smith, Kenneth L., 2013, Bathydorus laniger and Docosaccus maculatus (Lyssacinosida; Hexactinellida): Two new species of glass sponge from the abyssal eastern North Pacific Ocean, pp. 386-400 in Zootaxa 3646 (4) on page 388, DOI: 10.11646/zootaxa.3646.4.4, http://zenodo.org/record/22347
Temporal changes in deep-sea sponge populations are correlated to changes in surface climate and food supply
No full textDensity and average size of two species of abyssal sponges were analyzed at Station M (?4100 m depth) over an 18-year time-series (1989–2006) using camera sled transects. Both sponge taxa share a similar plate-like morphology despite being within different families, and both showed similar variations in density and average body size over time, suggesting that the same factors may control the demographics of both species. Peaks in significant cross correlations between increases in particulate organic carbon flux and corresponding increases in sponge density occurred with a time lag of 13 months. Sponge density also fluctuated with changes in two climate indices: the NOI with a time lag of 18 months and NPGO with a time lag of 15 months. The results support previous suggestions that increased particulate organic carbon flux may induce recruitment or regeneration in deep-sea sponges. It is unknown whether the appearance of young individuals results from recruitment, regeneration, or both, but the population responses to seasonal and inter-annual changes in food supply demonstrate that sponge populations are dynamic and are capable of responding to inter-annual changes despite being sessile and presumably slow-growing
Lyssacinosida Zittel 1877
No full textOrder Lyssacinosida Zittel, 1877Published as part of <i>Kahn, Amanda S., Geller, Jonathan B., Reiswig, Henry M. & Smith, Kenneth L., 2013, Bathydorus laniger and Docosaccus maculatus (Lyssacinosida; Hexactinellida): Two new species of glass sponge from the abyssal eastern North Pacific Ocean, pp. 386-400 in Zootaxa 3646 (4)</i> on page 388, DOI: 10.11646/zootaxa.3646.4.4, <a href="http://zenodo.org/record/223479">http://zenodo.org/record/223479</a>
Rossellidae Schulze 1885
No full textFamily Rossellidae Schulze, 1885Published as part of <i>Kahn, Amanda S., Geller, Jonathan B., Reiswig, Henry M. & Smith, Kenneth L., 2013, Bathydorus laniger and Docosaccus maculatus (Lyssacinosida; Hexactinellida): Two new species of glass sponge from the abyssal eastern North Pacific Ocean, pp. 386-400 in Zootaxa 3646 (4)</i> on page 388, DOI: 10.11646/zootaxa.3646.4.4, <a href="http://zenodo.org/record/223479">http://zenodo.org/record/223479</a>
FIGURE 1 in Bathydorus laniger and Docosaccus maculatus (Lyssacinosida; Hexactinellida): Two new species of glass sponge from the abyssal eastern North Pacific Ocean
No full textFIGURE 1. Collection location of two new species of glass sponges with a unique plate-like morphology: Station M (4,100 m depth, 34º50'N, 123º0'W), a long-term abyssal study site in the northeast Pacific.Published as part of Kahn, Amanda S., Geller, Jonathan B., Reiswig, Henry M. & Smith, Kenneth L., 2013, Bathydorus laniger and Docosaccus maculatus (Lyssacinosida; Hexactinellida): Two new species of glass sponge from the abyssal eastern North Pacific Ocean, pp. 386-400 in Zootaxa 3646 (4) on page 387, DOI: 10.11646/zootaxa.3646.4.4, http://zenodo.org/record/22347
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
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
Docosaccus Topsent 1910
No full textGenus Docosaccus Topsent, 1910 Type species: Docosaccus ancoratus Topsent, 1910 Genus diagnosis. Lophophytous, body sac-like or plate-like, with thin walls fixed by several tufts of anchorlike basalia or bundles of diactins surrounding a giant hexactin. Choanosomal spicules are diactins, rarely hexactins and their derivatives. Largest choanosomal spicules are hexactins with long tangential rays or rays of varying size. Dermalia are hexactins, atrialia are hexactins or pentactins. Microscleres are hexactins, hemihexasters, hexasters, floricomes, and probably discohexasters (Tabachnick 2002 a: 1395–1396, emended). Remarks. The diagnosis of the genus is emended to include the plate-like gross morphology, anchoring spicules, and atrial pentactins that occur in the new species.Published as part of Kahn, Amanda S., Geller, Jonathan B., Reiswig, Henry M. & Smith, Kenneth L., 2013, Bathydorus laniger and Docosaccus maculatus (Lyssacinosida; Hexactinellida): Two new species of glass sponge from the abyssal eastern North Pacific Ocean, pp. 386-400 in Zootaxa 3646 (4) on page 392, DOI: 10.11646/zootaxa.3646.4.4, http://zenodo.org/record/22347
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