1,721,035 research outputs found
Sepiola Leach 1817
No full textGenus Sepiola Leach, 1817 Sepiola Leach, 1817: 137. Type species Sepiola rondeletii Leach, 1817, by monotypy. Diagnosis Sepiolines with pair of kidney-shaped light-organ lenses on ventral surface of ink sac; suckers biserial on arms I to III and at least proximally on arms IV; tentacle club suckers in four to eight oblique rows; females with ear-shaped bursa copulatrix on left ventral side of mantle cavity; males with left arm I hectocotylized: suckers and sucker stalks typically arranged in a basal part, a copulatory apparatus comprised of modified suckerless stalks, and a distal part (Bello 2013).Published as part of Bello, Giambattista & Salman, Alp, 2015, Description of a new sepioline species, Sepiola boletzkyi sp. nov. (Cephalopoda: Sepiolidae), from the Aegean Sea, pp. 1-12 in European Journal of Taxonomy 144 on page 3, DOI: 10.5852/ejt.2015.144, http://zenodo.org/record/378739
Euprymna Steenstrup 1887
No full textEuprymna Steenstrup, 1887 Fig. 7 Euprymna Steenstrup, 1887a: 43. Type species Inioteuthis morsei Verrill, 1881, by subsequent designation. Diagnosis Sepiolinae with fins rounded; their length about half mantle length. Arm suckers in 4, exceptionally 8 longitudinal rows. Tentacle club with numerous minute suckers in a few tens of longitudinal rows. Mantle-head occipital band broad, extending over the ocular globes.A pair of kidney-shaped photophores on ventral surface of ink-sac. Gladius absent. Ventral mantle margin slightly sinuate, without any deep funnel indentation. Hectocotylus (male left arm I) thicker than right arm I, bipartite: proximal part, occupying 1⁄5 to ½ of arm, with regular suckers, except for 1–3 modified pedicels (may bear vestigial suckers), lengthened papilla-like, in 3 rd to 5 th position of ventral sucker row; distalmost part, occupying ½ to *⁄5 of arm distally, with lengthened columnar sucker pedicels, closely packed to form longitudinal palisades, bearing at tip embedded suckers that are partially covered by fleshy caps, number of palisades proximally equal to that of regular sucker rows but reduced toward arm extremity. Female bursa copulatrix pouch-like. Included species Euprymna morsei (Verrill, 1881), E. albatrossae, Voss, 1962, E. berryi Sasaki, 1929, E. brenneri Sanchez et al., 2019, E. hoylei Adam, 1986, E. hyllebergi, Nateewathana, 1997, E. megaspadicea Kubodera & Okutani, 2002, E. penares (Gray, 1849), E. scolopes Berry, 1913, E. stenodactyla (Grant, 1833) and E. tasmanica (Pfeffer, 1884). Remarks Some nominal tetraseriate sucker species are deemed unresolved (cf. Norman & Lu 1997). The biseriate sucker arm E. parva, E. pardalota and E. phenax, were removed from this genus to be placed into Eumandya gen. nov. (see above). The species in Euprymna are distributed in tropical and temperate waters of the Indo-West Pacific region (Norman & Lu 1997; Nateewathana 1997; Kubodera & Okutani 2002; Reid 2011).Published as part of Bello, Giambattista, 2020, Evolution of the hectocotylus in Sepiolinae (Cephalopoda: Sepiolidae) and description of four new genera, pp. 1-53 in European Journal of Taxonomy 655 on pages 39-40, DOI: 10.5852/ejt.2020.655, http://zenodo.org/record/388879
Sepiolinae Leach 1817
No full textDichotomous identification key to the genera of Sepiolinae In the following key, characters valid for both sexes were used whenever possible (Atl. = Atlantic; Med. = Mediterranean). 1. Four or more longitudinal rows of suckers on regular arms........................................................................................................................................................ Euprymna Steenstrup, 1887 (Indo-Pacific) – Two longitudinal rows of suckers on regular arms (in a few species the ventral arm tips may bear more than two rows)......................................................................................................................... 2 2. No light organ in mantle cavity........................................................................................................ 3 – Visceral light organs embedded in ink sac........................................................................................ 4 3. Twelve or more longitudinal rows of suckers on tentacle clubs. Copulatory apparatus of hectocotylus a transverse crest formed by four modified sucker pedicels, with ventral hook. Female bursa copulatrix ear-like (open type) ............................................... Sepietta Naef, 1912 (NE Atl. to Med.) – Eight to ten longitudinal rows of suckers on tentacle clubs. Copulatory apparatus of hectocotylus wide, ear-shaped, formed by many more than four modified sucker pedicels, dorsal and three proximo-ventral ones joined by web. Female bursa copulatrix pouch-like (closed type)...................................................................................... Inioteuthis Verrill, 1818 (Indo-Pacific) 4. Paired visceral light organs, kidney-shaped..................................................................................... 5 – Visceral light organ roundish............................................................................................................ 8 5. Fins much longer than 50% mantle length, anteriorly almost reaching mantle margin. Distal part of hectocotylus with sucker pedicels leaf-like, latero-laterally wide ............................................................................................................................................................. Lusepiola gen. nov. (Indo-Pacific) – Fins about 50% mantle length. Sucker pedicels in distal part of hectocotylus different from above, either regular or columnar................................................................................................................ 6 6. Hectocotylus with only one modified ventral sucker pedicel, papilla-like, in copulatory apparatus, distalmost part palisaded; female bursa copulatrix pouch-like (closed type) .......................................................................................................................................... Eumandya gen. nov. (Indo-Pacific) – Hectocotylus with four or more modified sucker pedicels, both dorsal and ventral, in copulatory apparatus and distal part with regular pedicels, a few suckers may be enlarged; female bursa copulatrix ear-like (open type).......................................................................................................... 7 7. Ventral mantle margin slightly sinuate; copulatory apparatus of the hectocotylus a high transverse crest formed by two dorsal and two modified sucker pedicels, elongated to about the same length and fused with each other throughout their length (additional poorly developed mesial pedicels may occur in a few species).......................................................... Sepiola Leach, 1817 (NE Atl. to Med.) – Ventral mantle margin markedly sinuate with deep funnel indentation, protruding anteriorly on each side of funnel; copulatory apparatus of the hectocotylus with two modified ventral pedicels separate from dorsal ones, the dorsal-most ones mesially protruding towards the right arm I...................................................................................................................... Adinaefiola gen. nov. (NE Atl. to Med.) 8. Visceral light organ shape approximatively round; 16 longitudinal rows of suckers on tentacle clubs; copulatory apparatus of the hectocotylus formed by two dorsal and two ventral modified sucker pedicels fused into transverse low crest, ventral-most pedicel a strong hook................................................. Rondeletiola Naef, 1921 (Med., NE Atl. to SW Indian Ocean) – Visceral light organ cordiform with two anterior lobes; 8 longitudinal rows of suckers on tentacle clubs; copulatory apparatus of the hectocotylus formed by three ventral modified sucker pedicels, horn-like:..................................................................................... Boletzkyola gen. nov. (West Africa)Published as part of Bello, Giambattista, 2020, Evolution of the hectocotylus in Sepiolinae (Cephalopoda: Sepiolidae) and description of four new genera, pp. 1-53 in European Journal of Taxonomy 655 on pages 43-44, DOI: 10.5852/ejt.2020.655, http://zenodo.org/record/388879
A ‘machine learning’ technique for discriminating captive-reared from wild Atlantic bluefin tuna, Thunnus thynnus (Osteichthyes: Scombridae), based on differential fin spine bone resorption
Get PDFThe Atlantic bluefin tuna (ABFT) fishery is regulated by the International Commission for the Conservation of Atlantic Tunas (ICCAT), which establishes the allowable annual yield and the minimum capture size, and allocates capture quotas to the Contracting Parties. Despite fishery monitoring, a considerable amount of captures escapes ICCAT control. In the Mediterranean Sea, the purse seine fishery supports ABFT farming, a capture-based aquaculture activity that involves catching fish from the wild and rearing them in sea cages for a few months. The first spine of the cranial dorsal fin undergoes a continuous bone remodeling process consisting in old bone (primary bone) resorption and new bone (secondary bone) apposition. A marked increase of spine bone resorption was shown in captive-reared ABFT with respect to wild specimens. In this paper, the Random Forest (RF), a Computer Aided Detection system, was applied to distinguish captive-reared from wild ABFT based on fish age, fish fork length, total surface of spine cross section, and surface of remodeled bone tissue in the spine cross section (sum of reabsorbed bone tissue and secondary cancellous bone). The RF system was also compared to the Logistic Regression method (LR). The percentages of properly classified animals, either wild or captive-reared, with respect to the overall number of animals, i.e. accuracy, was 95.3 ± 2.6% and 79.0 ± 5.1% for RF and LR, respectively. The percentages of the properly classified captive-reared specimens, i.e. sensitivity, were 93.5 ± 3.1% and 75.8 ± 5.3% for RF and LR, respectively. The percentages of the properly classified wild specimens was 96.7 ± 2.2% and 81.4 ± 4.9%, for RF and LR, respectively. The proposed technique appears to be a reliable investigation tool anytime the suspicion arises that illegally caught ABFT are sold as aquaculture products
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
- …
