1,720,979 research outputs found
Evaluation of sexual behavior of housed male camels (Camelus dromedarius) through female parades: correlation with climatic parameters
No full textCamels are seasonal breeders, and their sexual behavior is
influenced by environmental conditions, but the relationship
between climatic factors and sexual behavior has been poorly
described in the available literature. Nowadays, the male camel
living habit is shifting towards captivity; thus, this study was carried
out to evaluate the sexual behavior of housed male dromedary
camel through female’s parades and to correlate it with climatic
parameters. Four housed sires, reared for semen collection, and
one dam were used and the trial lasted 8 weeks, considering the first week as control. Six days per week and during evenings, the
female was brought near each males’ boxes, while two observers
filled a behavioral sampling ethogram and scored the male sexual
behavior. After this parade, blood samples were taken from the
female to evaluate the estradiol concentration. In addition, the
following meteorological parameters were recorded, everyday, at
9:00 a.m. and 19:00 p.m.: pressure, wind, temperature, humidity,
and H-index. The correlation between sexual behavioral score and
female estradiol concentration and climate parameters was
analyzed. All the behavioral parameters showed a significant
upward trend; female estradiol concentration varied during the
period and picked at week 5. Male sexual behavior was negatively
correlated with morning H-index, wind, and temperature, and
positively correlated with pressure and evening humidity, whereas it
was not correlated with estrogen. In conclusion, female parade was
a successful method to evaluate and stimulate the occurrence of
housed male dromedary camel sexual activity that resulted to be
negatively affected by hot temperature, warm wind, and lack of
rain
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
Effect of differnet management system on rutting behavior and behavioral repertoire of housed Maghrebi male camels (Camelus dromedarius)
No full textCamel management has been changing in recent years from an extensive to a semi-intensive or intensive system, particularly for breeding bulls and dairy dromedary camels. Captivity may affect animal welfare, and low libido is the major complaint for housed breeding bulls. Since welfare status could also affect reproductive performance, the aim of this study was to evaluate different management practices on behavior, particularly on sexual behavior, and to identify some behavioral needs of male dromedary camels reared for semen collection. The effects of the following management systems on their behavior were compared: i) traditional: housing in a single stall for 24 hours (H24), ii) housing in a single stall for 23 hours with one hour free in the paddock (H23) and iii) housing in a single stall for 22 hours and 30 min with 1 h paddock time and 30 min exposure to a female camel herd (ExF). During the trial, blood cortisol concentrations were assessed and camels were filmed daily for thirty minutes in the mornings and during a female passage in the evenings. Videos were analyzed in order to fill out a focal sampling ethogram and to score sexual behavior. As a result, there were no differences between the H24 and H23 systems, whereas ExF had a significant positive impact on their sexual behavior score and behavioral repertoire, further reducing cortisol levels. Overall, it seems that male dromedary camel welfare status improves when their behavioral needs for social interaction and movement are satisfied
Effect of differnet management system on rutting behavior and behavioral repertoire of housed Maghrebi male camels (Camelus dromedarius)
No full textCamel management has been changing in recent years from an extensive to a semi-intensive or intensive system, particularly for breeding bulls and dairy dromedary camels. Captivity may affect animal welfare, and low libido is the major complaint for housed breeding bulls. Since welfare status could also affect reproductive performance, the aim of this study was to evaluate different management practices on behavior, particularly on sexual behavior, and to identify some behavioral needs of male dromedary camels reared for semen collection. The effects of the following management systems on their behavior were compared: i) traditional: housing in a single stall for 24 hours (H24), ii) housing in a single stall for 23 hours with one hour free in the paddock (H23) and iii) housing in a single stall for 22 hours and 30 min with 1 h paddock time and 30 min exposure to a female camel herd (ExF). During the trial, blood cortisol concentrations were assessed and camels were filmed daily for thirty minutes in the mornings and during a female passage in the evenings. Videos were analyzed in order to fill out a focal sampling ethogram and to score sexual behavior. As a result, there were no differences between the H24 and H23 systems, whereas ExF had a significant positive impact on their sexual behavior score and behavioral repertoire, further reducing cortisol levels. Overall, it seems that male dromedary camel welfare status improves when their behavioral needs for social interaction and movement are satisfied
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
First successful artificial insemination of synchronized female Maghrebicamels in Tunisia
No full textEffect of continuous female exposition on testosterone level and sexual behavior in male dromedary camel
No full textAppropriate 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
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