1,721,122 research outputs found
On the occurrence of the giant devil ray Mobula mobular (Bonnaterre, 1788) from the Mediterranean coast of Turkey - a by-catch documentation
Full text linkTuran, Cemal/0000-0001-9584-0261WOS: 000321436500046
Occurrence of Schedophilus ovalis (Cuvier, 1833) (Osteichthyes: Centrolophidae) in the North-Eastern Mediterranean, Turkey
Full text linkTuran, Cemal/0000-0001-9584-0261; Erguden, Deniz/0000-0002-7682-6867; Erguden, Deniz/0000-0002-2597-2151WOS: 000313553400042…Ministry of Agriculture and Rural Affairs of TurkeyGida Tarim Ve Hayvancilik Bakanligi [TAGEM-09AR-GE11]This study was supported by the Ministry of Agriculture and Rural Affairs of Turkey, project number TAGEM-09AR-GE11, coordinated by CT
First record of the blue-barred parrotfish, Scarus ghobban Forsskal, 1775 from Turkish coastal waters
Full text linkErguden, Deniz/0000-0002-7682-6867; Turan, Cemal/0000-0001-9584-0261; Erguden, Deniz/0000-0002-2597-2151WOS: 000333452200028
FIGURE 2 in First record of a Lessepsian migrant: the sea cucumber Holothuria (Theelothuria) hamata Pearson, 1913
No full textFIGURE 2. Holothuria (Theelothuria) hamata Pearson, 1913. A. Dorso-lateral view; B. Ventral view (Photo's by M. Aydin)Published as part of Aydin, Mehmet, Gurlek, Mevlut, Samyn, Yves, Erguden, Deniz & Turan, Cemal, 2019, First record of a Lessepsian migrant: the sea cucumber Holothuria (Theelothuria) hamata Pearson, 1913, pp. 94-100 in Zootaxa 4551 (1) on page 96, DOI: 10.11646/zootaxa.4551.1.7, http://zenodo.org/record/262262
First record of a Lessepsian migrant: the sea cucumber Holothuria (Theelothuria) hamata Pearson, 1913
No full textAydin, Mehmet, Gurlek, Mevlut, Samyn, Yves, Erguden, Deniz, Turan, Cemal (2019): First record of a Lessepsian migrant: the sea cucumber Holothuria (Theelothuria) hamata Pearson, 1913. Zootaxa 4551 (1): 94-100, DOI: 10.11646/zootaxa.4551.1.
POPULATION STRUCTURE ANALYSIS OF RED BARRACUDA, SPHYRAENA PINGUIS (PERCIFORMES, SPHYRAENIDAE) IN THE NORTH-EASTERN MEDITERRANEAN SEA USING MORPHOMETRIC AND MERISTIC CHARACTERS
Full text linkTuran, Cemal/0000-0001-9584-0261WOS: 000351332500001Population structure of red barracuda, Sphyraena pinguis, in north-eastern Mediterranean waters was investigated using morphometric and meristic characters. In discriminant function analysis, first, second and third discriminant functions explained 48.6%, 30.2% and 21.2% of the between-group variation respectively. Plotting first and second discriminant functions explained 81.1% of the between-group variation, and revealed the existence of four morphologically distinct populations of S. pinguis in the north-eastern Mediterranean coastal waters. A correct classification of individuals into their original population was ranged from 93.3% to 96.7%, and the overall random assignment was high (96.7%). The proportion of correctly classified individuals into their original group was the same and greatest (96.7%) for the Iskenderun Bay and Syrian samples. In hierarchical cluster analysis, the Mersin Bay sample was clustered as the first clade, while the Iskenderun Bay and Syrian samples were in the neighbouring clades, and the Antalya Bay sample was clustered as the most divergent. Examination of the contribution of each morphometric and meristic character to the first and second principal components revealed that the observed differences were mainly from the characters associated on head length and eye diameter, indicating that these characters are important in the detected differentiation of the populations
Elasmobranch bycatch in a bottom trawl fishery in the Iskenderun Bay, northeastern Mediterranean
No full textTuran, Cemal/0000-0001-9584-0261; Erguden, Deniz/0000-0002-2597-2151WOS: 000358550200005Total biomass, species composition, depth distribution, seasonal distribution and abundance of elasmobranchs were examined by commercial bottom trawls between 2009 and 2010 from Iskenderun Bay, Turkish coast of the northeastern Mediterranean. From 52 bottom trawl surveys, it was estimated that elasmobranchs represented 23% (190.1 kg.km(-2)) of total fish biomass (840.8 kg.km(-2)) in Iskenderun Bay. Dasyatis pastinaca, Gymnura altavela, Raja clavata and Rhinobatos spp. (Rhinobatos rhinobatos and Glaucostegus cemiculus) showed high occurrence and represented each between 11.10 and 38.46% of the whole elasmobranch biomass. The other species, Dipturus oxyrinchus, Raja miraletus, Torpedo marmorata and Torpedo torpedo, represented each between 0.12 and 2.82% of the total elasmobranchs biomass. Shark species, Mustelus mustelus, Scyliorhinus stellaris, Scyliorhinus canicula, Galeus melastomus and Squatina squatina, represented each between 0.45 and 1.7% of the whole elasmobranchs biomass. When seasonal distribution was examined, total catch of fish were 32.38, 23.24, 10.71 and 33.65%, of which elasmobranchs species constitute 24.11, 34.12, 20.42 and 21.34% in autumn, winter, spring and summer respectively. Single or sporadic captures were also recorded for Isurus oxyrinchus, Carcharhinus plumbeus, Carcharhinus altimus, Oxynotus centrina, Raja radula, Rhinoptera marginata and Pteromylaeus bovinus
Age and growth of the nakedband gaper, Champsodon nudivittis (Ogilby, 1895), from the Iskenderun Bay, Northeastern Mediterranean
Full text linkErguden, Deniz/0000-0002-7682-6867; Turan, Cemal/0000-0001-9584-0261; Erguden, Deniz/0000-0002-2597-2151WOS: 000342604600006The nakedband gaper Champsodon nudivittis (Ogilby, 1895) was first recorded in 2009 on Turkish coastal waters, and has rapidly increased around this region. C. nudivittis is the first lessepsian immigrant of Champsodontid species in the Turkish coastal waters. The present study aims to determine the age and growth parameters of C. nudivittis colonized in the Iskenderun Bay, North-eastern Mediterranean Sea. A total of 296 collected individuals (seasonally average 74 specimens) were studied from November 2011 to October 2012. Total specimen lengths and weights ranged from 6.00 to 14.40 cm and from 1.4 to 29.3 g respectively. Maximum age was 2 years for both sexes. The length-weight relationship was described as W= 0.0040 x L-3.207 (R-2 = 0.957)5 W= 0.0005 x L-3.158 (R-2 = 0.959) and W= 0.0040 x L-3.196 (R-2 = 0.955). The parameters of von Bertalanffy growth fitted to mean observed total lengths-at-age for each sex separately and estimated as L-infinity= 20.41 cm, K= 0.224 year(-1), t(0)= -2.491 year for females,L-infinity= 21.53 cm, K= 0.199 year(-1), t(0)= -2.154 year for males, and as L-infinity= 21.10 cm, K= 0.210 year(-1), t(0)= -2.639 year for combined sexes
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
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