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Phenotypic and morphological characterization of indigenous chicken populations in southern region of Ethiopia
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Assessment of the prevailing handling and quality of eggs from scavenging indigenous chickens reared in different agro-ecological zones of Ethiopia
No full textA survey based experiment was conducted from November 2010 to April 2011 in 196 households
to assess egg handling and qualities of scavenging chickens reared in highland, midland and
lowland agro-ecological zones of Amhara Regional State, Ethiopia. For egg quality determination,
among 196 households, 30 of them who keep only local chickens were identified from each agroecology from which 588 eggs (196 eggs from each agro-ecology) were collected. The flock size in
highland, midland and lowland agro-ecologies was 8.5, 7.4 and 8.4 chickens, respectively. The
results indicated that about 95% and 70% of the respondents fumigate day old chicks with smoke
and clip tail feathers, respectively. The average age at first egg lay was 6.94, 6.43 and 6.57 months
for highland, midland and lowland agro-ecologies, respectively. The survivability of chickens in
highland, midland and lowland agro-ecological zones was 55.0%, 61.4% and 55.1%, respectively.
On the average 79.1% hatchability, 58.3% chick survivability was found in the study area. The
observed values of egg weight, egg length, egg width, yolk height, albumen height and Haugh unit
were significantly (p< 0.05) different between the investigated agro-ecologies. Accordingly, all
these traits were (p< 0.05) higher in midland than those of highland and lowland agro-ecological
zones. Agro-ecology did not affect shape index, shell thickness, yolk width and yolk index values.
The respective average egg weight, shell thickness and shape index values were 39.6 g, 0.296 mm
and 73.2%. The average values of yolk height, yolk width and Haugh unit were 16.1 mm, 36.8 mm
and 73.2, respectively. In conclusion, the midland agro-ecological system appears to favor the
survivability and expression of external and internal egg quality traits of scavenging rural
chickens
EVALUATING THE GROWTH PERFORMANCE OF LOCAL KEI CHICKENS AND THEIR F1-CROSSES WITH RHODE ISLAND RED AND FAYOUMI BREEDS IN WATERSHED AREAS OF GURAGHE ADMINISTRATIVE ZONE, SOUTHERN ETHIOPIA
No full textThis study describes the on-farm performance of local Kei chicken and its F1 crosses with Fayoumi and Rhode Island Red (RIR) breeds in Beresa watershed of Guraghe administrative zone, southern Ethiopia. The Kei paternal line was mated with maternal lines of Fayoumi and RIR chickens to produce F1-crosses. Body weight developments and feed intake were determined on weekly basis. Then body weight gain and feed efficiency ratios (FER, weight gain: feed) were calculated. Hatchability was 59.0% and 73.7%, 54.7% for Kei, Fayoumi-crosses and RIR-crosses, respectively. In male chicks, the mean day-old weight ranged from 28.8 to 40.1 g and in female chicks from 26.2 to 35.8 g. The average body weight of matured male and female RIR-crosses was 1682 and 1227 g, respectively. The corresponding values for Fayoumi-crosses were 1310 and 1054 g and that of local Kei 1273 and 987 g. During the brooding period, the average daily feed intake was 25.9, 27.0 and 24.4 g for Kei, Fayoumi-crosses and RIR-crosses, respectively. The mean FER was 0.197, 0.213 and 0.243 g for Kei, Fayoumi-crosses and RIR-crosses, respectively. The average age at sexual maturity for Kei, Fayoumi-crosses and RIR-crosses was 183, 154 and 162 days, respectively. The results of the present study suggest that both F1-crosses showed a significant improvement in body weight, weight gain and FER under farmers’ management condition of the watershed areas suggesting the suitability of both genetic combinations with local Kei chickens for on-farm chicken productivity
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
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
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