196,071 research outputs found
Macroramphosus scolopax
No full textMacroramphosus scolopax (Linnaeus, 1758) (Figure 2A) Material examined: ESFM-PIS/9602, 4 specimens, 56-96 mm SL, northern Cyprus (35º24’N -33º07’E), 540 m, 10 July 1996; ESFM-PIS/0409, 5 specimens, 66-106 mm SL, Kusadasi Bay (37º56’N -27º01’E), 140-150 m, 22 March 2004. Description: First dorsal finrays V -VI, second dorsal finrays 11-13, anal finrays 18-19, pectoral finrays 16, caudal finrays 19-22. Body compressed and deep (maximum body depth 3.71 to 4.60 times in SL); widest point passing through a vertical line above pelvic fins. Body height sharply descending between the first soft ray of second dorsal fin and the caudal peduncle, forming a significant hump. Head elongate with long and tubular snout. Mouth opening very small, toothless, and located at tip of snout. Eye large, its diameter greater than postocular head length; located close to dorsum of head, bearing a prominent supraorbital crest; a patch of small spinules on the anterior part of the eye (Figure 3A). First dorsal fin originating above anus; second spine strong, greatly enlarged with serrated posterior edge (total number of denticules 14-23, mean=17.57), extending beyond second dorsal fin base. Body covered with small and finely toothed scales, giving the body a sandpapery feel. Two series of bony plates embedded in the skin on the back between head and dorsal fin, each series consisting of three well-developed plates and a fourth much smaller plate; posterior edge of each plate serrated in adults. Ventral body profile convex; ventral scutes protruding; a prominent projecting scute between the pelvic and anal fins (Figure 4A). Fresh specimens of both juveniles and adults are orange, red or pinkish on the back; paler and silvery on the sides. Three or four red blotches generally occur (adults) on the second spine of first dorsal fin. Morphometric values are given in Table 1. Distribution and biology: M. scolopax is a cosmopolitan species, probably with a worldwide distribution. It occurs throughout the Mediterranean Sea (excluding the Sea of Marmara and the Black Sea; Bilecenoglu et al., 2002), Atlantic, Indian and Pacific oceans, mainly in tropical and temperate latitudes between 20º and 40º N (Ehrich, 1975, 1986; Fritzsche, 2002). The species is known to inhabit depths down to 500 m or more, but is more abundant between 50 - 200 m (Wheeler, 1973; Fischer et al., 1987). A school of M. scolopax was previously observed by the author at an exceptional depth of 6 m along Kas coasts (eastern Mediterranean coast of Turkey), during 1995. Age and growth parameters of M. scolopax are available only from the Atlantic Ocean, revealing a short life span (maximum of six years) and a fast growth (Ehrich, 1976; Brethes, 1979; Borges, 2000). The species is a benthic feeder; stomach contents of specimens from Moroccon coasts and Great Meteor Seamount generally included foraminifers associated with non-living bottom material (i.e. sand) and crustaceans (Ehrich, 1976; Brethes, 1979; Matthiessen et al., 2003). In Japanese coast, M. scolopax feeds on crustaceans, especially amphipods (Miyazaki et al., 2004). Maximum known size for the species is 22.8 cm total length (Borges, 2001); however, lengths exceeding 16.0 cm are uncommon.Published as part of Murat Bilecenoglu, 2006, Status of the genus Macroramphosus (Syngnathiformes: Centriscidae) in the eastern Mediterranean Sea., pp. 55-64 in Zootaxa 1273 on page 5
Macroramphosus gracilis
No full textMacroramphosus gracilis (Lowe, 1839) (Figure 2B) Material examined: ESFM-PIS/9805, 9 specimens, 43-67 mm SL, northern Cyprus (35º13’N -33º56’E), 102 m, 14 July 1998; ESFM-PIS/0202, 3 specimens, 56-66 mm SL, Babakale-Çanakkale (northern Aegean Sea), 140 m, 27 April 2002; ESFM-PIS/0211, 3 specimens, 56-84 mm SL, Kusadasi Bay (southern Aegean Sea), 160 m, 02 October 2002; ESFM-PIS/0416, 1 specimen, 106 mm SL, northern Aegean Sea, 70 m, 28 July 2004. Description: First dorsal fin IV -V, second dorsal finrays 11-13, anal finrays 18-19, pectoral finrays 16, caudal finrays 20-22. Body compressed and slender (maximum body depth 4.53 to 5.39 times in SL). Body height gradually decreasing after the first dorsal fin, forming no or slightly elevated hump over second dorsal fin base. Head elongate with long and tubular snout. Mouth opening very small, toothless, and located at tip of snout. Eye large, its diameter smaller than postocular head length, located close to dorsum of head, bearing a prominent supraorbital crest; a crest-like structure on the anterior part of the orbital region, having no spinules (Figure 3B). First dorsal fin clearly originating before anus; second spine strong, enlarged with serrated posterior edge (total number of denticules 0-14, mean=8.63), not extending beyond second dorsal fin base. Body covered with small and finely toothed scales. Bony plate structure on the body is similar to M. scolopax, with posterior edge of each plate serrated in adults. Ventral body profile almost straight; ventral scutes not protruding; projecting scute between pelvic and anal fins absent or poorly developed (Figure 4B). Fresh specimens of juveniles are dark brown and adults are brownish on the back, paler and silvery on the sides. Morphometric values are given in Table 1. Distribution and biology: M. gracilis is a cosmopolitan species, distributed widely in the Indian, Pacific, and Atlantic Oceans (Ehrich & John, 1973; Wheeler, 1973). Occurrence of the species in various parts of the Mediterranean Sea was reported by several authors (Günther, 1889; D’Ancona, 1933; Ben-Tuvia, 1962, 1971; Demetropoulos & Neocleous, 1969; Tortonese, 1970; Wheeler, 1973; Berdar et al., 1977; Bauchot & Pras, 1980). A single report of M. gracilis from Turkey was evaluated as doubtful (for full account, see Bilecenoglu et al., 2002). Results of previous studies indicated that the species mainly occurs at depths between 100 and 450 m (Ehrich, 1976; Papaconstantinou & Tsimenides, 1979; Assis, 1993). Its growth pattern is similar to its congeneric species, with a short life span (five years) and a rapid attainment of maximum size (Borges, 2000). The feeding strategy of M. gracilis is selective both in the Atlantic and the Pacific oceans; individuals prey heavily on planktonic crustaceans (ostracods and copepods), quite different from the benthic diet of M. scolopax (Brethes, 1979; Matthiessen et al., 2003; Miyazaki et al., 2004).Published as part of Murat Bilecenoglu, 2006, Status of the genus Macroramphosus (Syngnathiformes: Centriscidae) in the eastern Mediterranean Sea., pp. 55-64 in Zootaxa 1273 on pages 58-6
New Mediterranean Marine biodiversity records (December, 2013)
No full textM. Bilecenoglu [et al.]Based on recent biodiversity studies carried out in different parts of the Mediterranean, the following 19 species are included as new records on the floral or faunal lists of the relevant ecosystems: the green algae Penicillus capitatus (Maltese waters); the nemertean Amphiporus allucens (Iberian Peninsula, Spain); the salp Salpa maxima (Syria); the opistobranchs Felimida britoi and Berghia coerulescens (Aegean Sea, Greece); the dusky shark Carcharhinus obscurus (central-west Mediterranean and Ionian Sea, Italy); Randall’s threadfin bream Nemipterus randalli, the broadbanded cardinalfish Apogon fasciatus and the goby Gobius kolombatovici (Aegean Sea, Turkey); the reticulated leatherjack Stephanolepis diaspros and the halacarid Agaue chevreuxi (Sea of Marmara, Turkey); the slimy liagora Ganonema farinosum, the yellowstripe barracuda Sphyraena chrysotaenia, the rayed pearl oyster Pinctada imbricata radiata and the Persian conch Conomurex persicus (south-eastern Crete, Greece); the blenny Microlipophrys dalmatinus and the bastard grunt Pomadasys incisus (Ionian Sea, Italy); the brown shrimp Farfantepenaeus aztecus (north-eastern Levant, Turkey); the blue-crab Callinectes sapidus (Corfu, Ionian Sea, Greece). In addition, the findings of the following rare species improve currently available biogeographical knowledge: the oceanic pufferfish Lagocephalus lagocephalus (Malta); the yellow sea chub Kyphosus incisor (Almuñécar coast of Spain); the basking shark Cetorhinus maximus and the shortfin mako Isurus oxyrinchus (north-eastern Levant, Turkey).Peer reviewe
Macroramphosus
No full text[[Genus Macroramphosus]] Discussion A total of 16 proportions of morphometric measurements were analyzed in this study. Five parameters (SnL/SL, HL/SL, PBL/SL, SnL/HL, MBD/LBDS) were similar between the two species, while a statistically significant difference was found for the remaining 11 characters (Table 1). Eye diameter measurements and its proportion in relation to HL, D1-D2 and PHL gave significant results. The most striking ratios were found to be as ED/D1-D2 (eye diameter greater than the length between dorsal fins in M. scolopax versus smaller in M. gracilis) and ED/PHL (postocular head length smaller than the eye diameter in M. gracilis, larger in M. scolopax). These ratios were previously used in identification keys to Mediterranean centriscid species by Bauchot & Pras (1980) and Tortonese (1970), respectively. The mean ED/HL indicates a smaller eye diameter for M. gracilis (16.74%), when compared to M. scolopax (19.04%). In several previous studies, length of dorsal spine (LDS) was considered as a very important character to discriminate Macroramphosus spp. Our findings revealed a slight overlap in the range values of LDS/SL and LDS/PBL; however, their mean values indicate a clear difference between the two species, where M. gracilis has a shorter dorsal spine when compared to M. scolopax. Similar results were obtained from studies conducted in the Atlantic and Pacific Oceans (Brethes, 1979; Assis, 1992; Mathiessen et al., 2003; Miyazaki et al., 2004). The eastern Mediterranean specimens of M. gracilis had conspicuously weaker dorsal spines, which does not reach to caudal base, as also noted by Günther (1889) and Smith (1965). Maximum body depths of the two species differ significantly. MBD/SL and MBD/ PBL ratios were smaller for M. gracilis, as a result of the slender body shape. Similar results were obtained by Brethes (1979), Assis (1992) and Miyazaki et al. (2004). We determined that body depth is found 3.71-4.60 times in SL of M. scolopax, and 4.53-5.39 times in M. gracilis, in agreement with the findings of Tortonese (1970). Apart from metric measurements, some other distinctive morphological characters were determined between the two species. The occipital crest located at the anterior part of eye bears prominent spinules in two or three rows in M. scolopax, but no spinule was observed on the occipital crest of M. gracilis (Figure 3). D’Ancona (1933) reported that, both supraorbital and occipital crests are visible in specimens with 3 mm length, becoming conspicuous in fish larger than 9 mm. Thus, a change in occipital crest structure through developmental stages between juveniles and adults is not expected, and this character can be used in distinguishing the two centriscid species. The relatively straight ventral body profile of M. gracilis is another distinctive feature, which was also mentioned in previous studies (D’Ancona, 1933; Miyazaki et al., 2004). The well-developed elevated scutes between the pelvic and anal fins of M. scolopax are conspicuous, while in M. gracilis scutes are either absent or represented by a single weakly developed scute (Figure 4). This character was stated to be diagnostic for Japanese Macroramphosus spp. (Miyazaki et al., 2004), which seems to be also valid for Mediterranean species. The number of spinules along the posterior margin of D2 spine of M. gracilis tends to be lower than M. scolopax (0-14 vs 14-23 spinules). The less denticulated dorsal spine structure of M. gracilis was also indicated by Günther (1889) and Tortonese (1970). Miyazaki et al. (2004) examined dorsal spine denticulation based on Japanese coast centriscids, where a degeneration of spinules by 50 mm SL was noted for M. gracilis - which is not the case in Mediterranean specimens. Since both centriscid species are known to be sympatric (i.e. Assis, 1992), the assumption indicated by Matthiessen et al. (2004) that ecological differences in diet composition and habitat use of sympatric species promotes morphological diversification should be concerned. Macroramphosus scolopax and M. gracilis are two morphologically similar species with some overlapping metric and meristic measurements, and no single character provides precise (Assis, 1992; Mathiessen et al., 2003). Based on the results of our study, the following combination of characters should be used in distinguishing Mediterranean specimens of M. gracilis from M. scolopax: first dorsal fin originating before anus; second spine of first dorsal not extending beyond second dorsal fin base; length between two dorsal fins greater than the eye diameter; ventral scutes not protruding; less developed projecting scute between pelvic and anal fins.Published as part of Murat Bilecenoglu, 2006, Status of the genus Macroramphosus (Syngnathiformes: Centriscidae) in the eastern Mediterranean Sea., pp. 55-64 in Zootaxa 1273 on pages 60-6
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
A new alien fish in the Mediterranean Sea - Platax teira (Forsskål, 1775) (Osteichthyes: Ephippidae)
No full textA single Platax teira (Forsskål, 1775) specimen was captured off Bodrum (southern Aegean Sea, Turkey) on 5 March 2006. It is the first record of this fish species in the Mediterranean Sea. Introduction of the species is probably due to an aquarium release. © 2006 The Author(s)
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
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