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Acroteriobatus variegatus Nair & Lal Mohan
No full text<i>Acroteriobatus variegatus</i> (Nair & Lal Mohan) <p>(Figs. 3C, 12A,B)</p> <p> Four specimens (SL-99, SL-100, SL-102, and SL-103) of a relatively small guitarfish were collected at the landing site in Mutur in the Eastern Province. These specimens exhibited anterior nasal flaps that extended well into the internarial space, placing them in the genus <i>Acroteriobatus</i> Giltay (see Ebert 2014a; Last <i>et al</i>. 2016b). Their color pattern, in combination with their possession of small thorns near the orbits and spiracles as well as a conspicuous mid-dorsal row of small thorns, fits the description of <i>A. variegatus</i> (see Nair & Lal Mohan 1973), which was originally reported from the Gulf of Mannar, India. As NADH2 data for a specimen of this species of confirmed identity are not available, we were unable to confirm this identification using molecular data. However, NADH2 sequence data were generated for all four specimens and they were included in our Neighbor-Joining analysis. These specimens differed from one another by 1–5 bp; in comparison, these specimens differed from our reference specimen of <i>Acroteriobatus annulatus</i> (Müller & Henle) (AF-156; JQ518915) from South Africa, the only other member of this genus included in the analysis, by 100–106 bp. An immature male of this species was deposited in the BRT Ichthyology Collection (SL-99; BRT-I 0027).</p> <p>The distribution of this species in the map presented by Ebert (2014a) includes the northwestern coast of Sri Lanka. However, to our knowledge, this is the first formal report of this species from the country.</p>Published as part of <i>Fernando, Daniel, Bown, Rosalind M. K., Tanna, Akshay, Gobiraj, Ramajeyam, Ralicki, Hannah, Jockusch, Elizabeth L., Ebert, David A., Jensen, Kirsten & Caira, Janine N., 2019, New insights into the identities of the elasmobranch fauna of Sri Lanka, pp. 201-238 in Zootaxa 4585 (2)</i> on pages 219-220, DOI: 10.11646/zootaxa.4585.2.1, <a href="http://zenodo.org/record/2637236">http://zenodo.org/record/2637236</a>
Report on the landing of the critically endangered Rhinobatid Acroteriobatus variegatus (Nair & Lal Mohan, 1973) with some insights into its reproductive biology
Get PDFA single specimen of a gravid female of the stripenose guitarfish, Acroteriobatus variegatus was landed as by-catch by a tuna hook and line at Sakthikulangara, Kerala from a depth of 110-130 m. The species is categorized as ‘critically endangered’ by IUCN. The morphometric characteristics of A. variegatus are described for the first time since its original description by Nair and Lal Mohan (1973) from Gulf of Mannar. The present study provides preliminary insights into its reproductive biology. The mode of reproduction in A. variegatus is aplacental yolk sac viviparity with low uterine fecundit
Bibliography of the Echinoderms of the Indian Ocean
Get PDFEchinoderms from the point of view of their taxonomy and evolution form one
of the most interesting groups of marine animals. Except for the R.I.M.S. “Investigator”
collections reported on by various authors there has been no sustained work on this
group in this country till detailed investigations were initiated recently by Mr. D.B.
James of this Institute. In the course of extensive work carried out, he had taken
considerable pains to collect a vast number of references to form a comprehensive
bibliography which has been augmented with some of the references collected by Mr.
R.S. Lal Mohan for Bulletin Nos. 4 and 11 issued by this Institute. There are in all 691
references listed in the present Bulletin covering all the classes of echinoderms and it is
hoped that the availability of a consolidated bibliography like this would act as an
incentive to interested workers to take up this group for study. The authors have done
their best to make the list as comprehensive as possible. However, it would very much
be appreciated if omissions and errors if any, are kindly brought to our notice
A THEORETICAL STUDY OF 5 STAR HOTELS IN GREATER CHENNAI CORPORATION ON PERCEPTION AND EXPECTATIONS OF GUESTS TOWARDS PREFERRINGFOOD ITEMS
No full textR. Aradhana1and Ajeet Kumar Lal Mohan
Bibliography of the Indian Ocean 1931 – 1961 - A supplement to the ‘Partial Bibliography’
Get PDFThis Bulletin is a continuation of Bulletin No. 4 issued from this Institute as a
Supplement (for the 1900-1930 period) to the ‘Partial Bibliography of the Indian Ocean’
brought out by the U. S. Program in Biology in 1962. In spite of various handicaps my
colleagues have managed to bring together as many relevant references as possible for
the 1931-1961 period, which did not find a place in the ‘Partial Bibliography’. There
are in all 2682 references of which the greater part comes under fishes (827), crustaceans
(418) and molluscs (293).
The preparation of the Bulletin was undertaken at my suggestion by Messrs. R.
S. Lal Mohan, D.B. James and K.K. Appukuttan who completed the same without
prejudice to their routine work. It is needless to say that they had sacrificed a great
deal of their spare time for this purpose and gives me great pleasure to record my
sincere thanks and appreciation for their high sense of responsibility, co-operative
spirit and devotion to duty. My thanks are also due to other members of the staff who
in various ways helped in the completion of the Bulletin
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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