1,720,962 research outputs found
Using Demography to Evaluate Reintroductions for Conservation of the Endangered Frog, Rana sierrae, in Streams
No full textBrown, Cathy, Keung, Neil C., Dillingham, Colin P., Mussulman, Sarah, Bushell, Jessie, Sollmann, Rahel, Todd, Brian D., Lawler, Sharon P. (2020): Using Demography to Evaluate Reintroductions for Conservation of the Endangered Frog, Rana sierrae, in Streams. Herpetologica 76 (4): 383-395, DOI: 10.1655/0018-0831-76.4.383, URL: https://bioone.org/journals/herpetologica/volume-76/issue-4/0018-0831-76.4.383/Using-Demography-to-Evaluate-Reintroductions-for-Conservation-of-the-Endangered/10.1655/0018-0831-76.4.383.ful
FIG. 1 in Using Demography to Evaluate Reintroductions for Conservation of the Endangered Frog, Rana sierrae, in Streams
No full textFIG. 1.—Locations of Rana sierrae streams surveyed 2016–2018. Insets show breeding areas.Published as part of Brown, Cathy, Keung, Neil C., Dillingham, Colin P., Mussulman, Sarah, Bushell, Jessie, Sollmann, Rahel, Todd, Brian D. & Lawler, Sharon P., 2020, Using Demography to Evaluate Reintroductions for Conservation of the Endangered Frog, Rana sierrae, in Streams, pp. 383-395 in Herpetologica 76 (4) on page 385, DOI: 10.1655/0018-0831-76.4.383, http://zenodo.org/record/771244
FIG. 3 in Using Demography to Evaluate Reintroductions for Conservation of the Endangered Frog, Rana sierrae, in Streams
No full textFIG. 3.—Fate of captive-reared frogs released into the South Fork Rock Creek reaches in 2017 and 2018. The number of frogs released into each stream is shown below each bar.Published as part of Brown, Cathy, Keung, Neil C., Dillingham, Colin P., Mussulman, Sarah, Bushell, Jessie, Sollmann, Rahel, Todd, Brian D. & Lawler, Sharon P., 2020, Using Demography to Evaluate Reintroductions for Conservation of the Endangered Frog, Rana sierrae, in Streams, pp. 383-395 in Herpetologica 76 (4) on page 390, DOI: 10.1655/0018-0831-76.4.383, http://zenodo.org/record/771244
FIG. 2 in Using Demography to Evaluate Reintroductions for Conservation of the Endangered Frog, Rana sierrae, in Streams
No full textFIG. 2.—Maximum number of years between captures of marked Rana sierrae first captured 2009–2013 in three northern Sierra Nevada streams. First captures occurred 2009–2011 in Lone Rock Creek and South Fork (SF) Rock Creek main channel, or 2009–2011 or 2013 in Independence Creek. Last captures occurred 2009–2011 in all three streams; 2013 in Independence Creek, 2015 in Lone Rock Creek and SF Rock Creek main channel, or 2016–2018 in all three streams.Published as part of Brown, Cathy, Keung, Neil C., Dillingham, Colin P., Mussulman, Sarah, Bushell, Jessie, Sollmann, Rahel, Todd, Brian D. & Lawler, Sharon P., 2020, Using Demography to Evaluate Reintroductions for Conservation of the Endangered Frog, Rana sierrae, in Streams, pp. 383-395 in Herpetologica 76 (4) on page 390, DOI: 10.1655/0018-0831-76.4.383, http://zenodo.org/record/771244
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
The genetic diversity and population structure of the dugongs (Dugong dugon) of Thailand
Full text linkThe dugong (Dugong dugon) is indigenous to the coastal waters of the Indo–Pacific Ocean and is vulnerable to extinction throughout its range due primarily to anthropogenic effects. In Thailand the population of dugongs is approximately 250 animals and is found in fragmented habitats along the Thai coast. Genetic studies were implemented in this study to assess regional genetic composition and determine if there is variation in the D–loop sequences or microsatellites consistent with philopatry to regions, by males or females, or indicating dispersal. Utilizing D–loop sequences, 27 haplotypes were found that grouped into three haplogroups that were not differentiated by region but did show spatial differentiation when analyzed with F–statistics. Microsatellite analysis provided evidence of three populations – one in the Gulf of Thailand and two in the Andaman Sea (north Andaman Sea and Trang Province). Weak structuring of mtDNA variation occurs between neighboring Andaman Sea regions and may indicate philopatry by females due to high quality seagrass meadows in Trang Province especially. Nuclear DNA analysis provided a signal of dispersal between the two sides of the peninsula explaining how genetic variation has remained at levels above expected for a species with declining numbers. Utilizing established bottleneck tests, no evidence was found indicating a bottleneck in the population, though there was a signal of population decline, especially in the Gulf region. Overall recommendations are for further molecular studies utilizing a greater sample size and additional populations in the Indo–Pacific region to determine historic dispersal and a more comprehensive study of population viability
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
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