1,720,959 research outputs found
FIG. 1 in Scale surface morphology in Lebias, Goldfuss, 1820 (Teleostei: Cyprinodontidae)
No full textFIG. 1. Collecting area of the Lebias specimens: (A) L. iberus: delta of the Ebro river, Spain; (B) L. apoda: Wadi Bou Merzoug, Algeria; (C) L. fasciata: Pantano of Marina di Modica, Italy; (D) L. dispar: Bitter Lake, Egypt; (E) L. sirhani: Aznaq Oase, Jordan.Published as part of FERRITO, VENERA, CORSARO, MAURIZIO & TIGANO, CONCETTA, 2003, Scale surface morphology in Lebias, Goldfuss, 1820 (Teleostei: Cyprinodontidae), pp. 1529-1534 in Journal of Natural History 37 (12) on page 1530, DOI: 10.1080/00222930210126668, http://zenodo.org/record/467529
FIG. 3 in Scale surface morphology in Lebias, Goldfuss, 1820 (Teleostei: Cyprinodontidae)
No full textFIG. 3. Scanning microphotograph of lepidonts: (A) dorsal view; (B) ventral view; (C) detail of the attachment of the lepidonts on the circle. cda, dorsal apex of the crest; cva, ventral apex of the crest; ni, niche. (1) L. fasciata; (2) L. iberus; (3) L. apoda; (4) L. dispar; (5) L. sirhani. (Scale bar: 2 µm).Published as part of FERRITO, VENERA, CORSARO, MAURIZIO & TIGANO, CONCETTA, 2003, Scale surface morphology in Lebias, Goldfuss, 1820 (Teleostei: Cyprinodontidae), pp. 1529-1534 in Journal of Natural History 37 (12) on page 1532, DOI: 10.1080/00222930210126668, http://zenodo.org/record/467529
Geographical and morphological variation within and between colour phases inCoris julis(L. 1758), a protogynous marine fish
Full text linkThe possible differences between sexes in patterns of morphological variation in geographical space have been explored only in gonochorist freshwater species. We explored patterns of body shape variation in geographical space in a marine sequential hermaphrodite species, Coris julis (L. 1758), analyzing variation both within and between colour phases, through the use of geometric morphometrics and spatially-explicit statistical analyses. We also tested for the association of body shape with two environmental variables: temperature and chlorophyll a concentration, as obtained from time-series of satellite-derived data. Both colour phases showed a significant morphological variation in geographical space and patterns of variation divergent between phases. Although the morphological variation was qualitatively similar, individuals in the initial colour phase showed a more marked variation than individuals in the terminal phase. Body shape showed a weak but significant correlation with environmental variables, which was more pronounced in primary specimens
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
Present distribution of the threatened killifish Aphanius fasciatus (Actinopterygii, Cyprinodontidae) in the Maltese Islands
Full text linkA survey of the nine localities from which the threatened Killifish Aphanius fasciatus has been recorded in the Maltese Islands showed that large and thriving populations exist at Salina, at the Simar and Ghadira bird sanctuaries and in reservoirs at Marsa and Ghadira. The Simar and Ghadira populations are introduced and originate from a mixture of animals collected from Salina and Marsa. The provenance of the Marsa population is unknown but it is possibly autochthonous to the Marsa area. The Salina and possibly the Marsa populations seem to be the only remaining natural populations of this species in the Maltese Islands.peer-reviewe
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
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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