1,721,050 research outputs found
Butterfly conservation in Southern Africa
No full textThe origins and development of butterfly conservation in southern Africa are explored and the role of the Lepidopterists’ Society of Africa (LSA) in the promotion of butterfly conservation and research is described. LSA members have produced several Red Lists for South African butterflies. The Southern African Butterfly Conservation Assessment project, a joint venture between LSA, the Animal Demography Unit (ADU—University of Cape Town) and the South African National Biodiversity Institute was launched in 2007. This has resulted in a comprehensive and accurate distributional database and rigorous conservation assessments using the IUCN (2010) Red Listing categories and criteria for the 794 butterfly taxa assessed. LSA’s Custodians of Rare and Endangered Lepidoptera programme aims to conserve all the threatened species, prioritising the Critically Endangered category. Moving beyond species-based conservation, habitat and landscape conservation are now key conservation strategies which focus on vegetation types and butterfly biodiversity hotspots. LSA (in partnership with ADU) has also recently launched the LepiMAP project, an online photographic geo-referenced database which will develop a butterfly and moth atlas for the whole of Africa, as part of a continent-wide conservation effort. Another important project which the LSA recently launched is the Caterpillar Rearing Group, for documenting the life histories of all Lepidoptera in the Afrotropical regio
The ecology and conservation of Thestor brachycerus brachycerus (Trimen, 1883): an aphytophagous miletine butterfly from South Africa
No full textThe existing knowledge of the biology and ecology of the butterfly genus Thestor is summarised, and the conservation status of the Critically Endangered Thestor brachycerus brachycerus reviewed. The biotopes of two hitherto unknown littoral colonies are compared with the known inland fynbos site. The size of the extant populations is recorded as a future monitoring baseline. The relationship between habitat structure and territorial behaviour of males is explored. Female oviposition substrates are recorded, and it is inferred that the larvae are aphytophagous. No correlation was detected between vegetation composition and the presence of butterfly populations. A requirement for low level male perching sites to engender territorial and thence mating behaviour was assessed as a key habitat resource. The commonest ant found in pitfall traps both within and outside the butterfly colonies was Anoplolepis custodiens, a known associate of Thestor butterflies. Future research should focus on determining the ant associations and food resources of all larval stage
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
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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