1,720,958 research outputs found
Species Composition, Distribution, Relative Abundance and Habitat Association of Rodents in Arbaminch Forest and Farmlands, Ethiopia.
No full textA comparative study of species composition, distribution and habitat
association of pest rodents was carried out in Arbaminch Forest and
nearby farmlands from August, 2005 to April, 2006. Six different types of
habitats, four from natural forest and two from farmlands were randomly
selected. These samples were from ground water forest, riverine forest,
deciduous bushland, Lake Abaya shore, maize plantation and cotton
plantation. In each habitat type, one representative trapping grid was
randomly selected for live trapping. In addition, rodents were also
surveyed from each habitat by snap trapping. Sixteen species of small
mammals that including two shrews were recorded from the study area.
Thirteen small mammals trapped were Mastomys natalensis (32.9%),
Arvicanthis dembeensis (30.6%), Acomys cahirinus (10.3%), Lemniscomys
striatus (8.3%), Mastomys erythroleucus (5.7%), Tatera robusta (3.4%),
Arvicanthis niloticus (2.9%), Stenocephalemys albipes (2.1%), Grammomys
dolichurus (1.3%), Mus musculus (1.3%) and Mus tenellus (0.3%), Crocidura
flavescence (0.6%) and Crocidura fumosa (0.3%). The distribution of
species varied from habitat to habitat and season to season. Eleven and
seven rodent species were trapped from natural habitats and farmlands,
respectively. Among trapped rodents, M. natalensis was the most widely
distributed species, whereas T. robusta and L. striatus were the least. The
population was also varied from season to season, high during the dry
season and less during the wet season. Four rodent species (M. natalensis,
A. dembeensis M. musculus and, Hystrix cristata ) were recoded as pests
species of maize crops in farmlands
Abundance, Distribution and Population Structure of Mountain Nyala (Tragelaphus buxtoni) in Hanto Controlled Hunting Area, Southeastern Ethiopia
No full textConservation challenge: Human-carnivore conflict in Chebera Churchura National Park, Ethiopia
No full textAn investigation on human-carnivore conflict was carried out between 2011 and 2012 around Chebera Churchura National Park. Totally 312 household samples were identified for interviews. Structured interviews were carried out in seven purposefully selected villages. Eight problematic species such as lion, leopard, jackal, wild dog, hyena, caracal, serval and anubis baboon were identified and considered as the most hazardous animals in the area. Domestic animal loss was the major problems encountered resulting in conflict between human and carnivore. Farmers reported significant problems with wild carnivores. A total of 997 individual losses of domestic animals were reported in the last three years. Predation peaked was observed during the wet season (56.3%). Most respondents reported use of guarding as very effective method in the villages. The level of conflict was increased in the recent years. The close proximity of the villages to the Park and time of a season influenced predation intensity. A combined strategy aimed at both improving husbandry techniques and education will reduce conflicts and contribute to improve conservation of these predators and reduce the loss of livestock in the area
Population status and human impact on the endangered Swayne’s hartebeest (Alcelaphus buselaphus swaynei) in Nechisar Plains, Nechisar National Park, Ethiopia
No full text
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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