1,720,961 research outputs found
Diversity and abundance of Small Mammals in Giritale Nature Reserve
Get PDFThe composition of small mammal communities in forest, shrub land, grassland and anthropogenic habitats of the Giritale Nature Reserve of north central Sri Lanka was studied from June 2006 to August 2007 to estimate the abundance and diversity of small mammals inhabiting this nature reserve. Live trapping using Sherman traps and Pitfall traps were adopted to catch the small mammals. A total of 71 individuals representing two orders (Insectivora and Rodentia) and three families (Soricidae, Muridae, Scuridae) was captured. Species recorded included Suncus murinus murinus Linnaeus, 1766 (Common Indian Musk Shrew), Mus cervicolor fulvidiventris Blyth, 1852 (Ceylon Field Mouse), Mus mus culuscastaneus Waterhouse, 1843 (Indian Field Mouse), Mus fernandoni Phillips, 1932 (Ceylon Spiny Mouse), Rattus blanfordi Thomas, 1881 (White Tailed Rat), Funambulus palmarum Linnaeus, 1766 (Indian Palm Squirrel) and Rattus rattus. The species Rattus rattus consisted of two subspecies Rattus attusrattus Linnaeus, 1758 (Common House Rat) and Rattus rattus rufescens Gray, 1837 (Indian House Rat). Highest and lowest abundances were recorded in the grasslands (0.08) and shrub lands(0.01), respectively. Highest diversity index was recorded in anthropogenic habitats (1.62), which included paddy fields, home gardens and buildings, while lowest diversity index was recorded in shrub lands (0.67). The number of small mammals captured was significantly different in the four habitat types (χ2 = 22.69, df = 3, p<0.05). This study, which is the first detailed examination of terrestrial small mammals in a dry zone forest of Sri Lanka, indicated that the Giritale Nature Reserve is home to six species of small mammals. Key words: Abundance, Diversity, Evenness, Nature reserve, Small mammal
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
Foraging behaviour of endemic Dull-blue Flycatcher Eumyias sordidus Volden 1870, (Passeriformes: Muscicapidae) in Tropical montane cloud forests of Sri Lanka.
Get PDFForaging behavior of endemic Sri Lanka Dull-blue Flycatcher (Eumyias sordidus) was studied in the tropical montane cloud forests of Horton Plains National park (HPNP), situated in the highland plateau of the Nuwara Eliya District from July 2015 to July 2017. Three main natural habitats were identified as Cloud Forest (CF), Cloud Forest Die-back (CFD) and Grassland (GL) associated with HPNP. Focal sampling method was used to study the foraging behaviour of E. sordidus. Foraging individuals were observed directly or through a binocular from 0600h to 1800h, on three consecutive days per month. Line transects and opportunistic observations were used to obtain foraging data. Foraging plant types were identified by using field guides. Total of 1694 foraging attempts were recorded during the study period. Maximum number of foraging observations (60.14%) were recorded from CF and least number of foraging observations (5.69%) were recorded from GL Habitat. Observed foraging height was 4.18±2.77m (Mean±Standard Deviation) above ground and distance to the canopy above the bird was 3.01±1.76m (M±SD). They preferred the trees with 6.04±2.75m (M±SD) height, 0.73±0.41m (M±SD) average diameter-at-breast height and 1.71±0.71m (M±SD) average trunk height in the montane forest habitat. E.sordidus diet consisted of prey (97.03%) and fruits (2.97%). Prey were captured in Air (29.70%), ground (25.49%), leaves (15.59%), moss (13.37%), twigs (6.44%), trunks (4.21%) and flowers (2.23%), substrates. Rubus ellipticus and Rubus rugosus were the main feeding plants of E. sordidus. Aerial foraging manoeuvre was identified as sallying (hawking). Four types (outward-sally-gleaning, upward-sally-gleaning, outward-striking and upward striking) of sally-gleaning capture techniques were observed. Return-to-perch frequency was 26%. Ground foraging manoeuvres were identified as ground-sally-gleaning, stand-ground-gleaning and hopping-ground-gleaning. When the stationary prey was taken from the substrate while perching, simple-perch-gleaning and landing-and-gleaning capture techniques were observed. The birds perched and picked at fruits without sallying (76%) and occasionally some individuals ate only a portion of the fruit without removing it from the plant (24%). Finding of the present study indicated that E. sordidus utilized prey items along with fruits of two plant species belongs to family Rosaceae which is indigenous to the montane cloud forests. The physical techniques of different prey capture methods and standardized nomenclature for these techniques were suggested from this study.Keywords: Foraging behaviour, Endemic birds, Eumyias sordidus, Montane Cloud Fores
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
- …
