Ercument Genc

Accumulation of some heavy metals in Hysterothylacium aduncum (Nematoda) and its host sea bream, Sparus aurata (Sparidae) from North-Eastern Mediterranean Sea (Iskenderun Bay)

The sea bream’s nematode and Sparus aurata, sampled from the Iskenderun Bay, Mediterranean, in March 2008 were analyzed by inductively coupled plasma–atomic emission spectrometry for their some heavy metal (Cd, Cr, Cu, Fe, Hg, Mn, Mg, Pb, and Zn) levels. The metal concentrations of the parasites were compared to different organs (liver, muscle, gill, intestine, and skin) of the fish hosts. There were significant differences in Cd, Cr, Cu, Fe, Mn, Zn, Hg, Mg, and Pb concentrations in tissues of fish and its parasite. The parasite Cd, Cu, and Pb concentration was higher than the other tissues. Furthermore, significant differences were detected in the heavy metal accumulations between the parasitized and unparasitized fish tissues in Cd, Cu, Hg, and Pb concentrations. The Cd, Hg, and Pb concentrations were found in fish muscle at mean concentrations over the permissible limits proposed by the Food and Agriculture Organization.

Molecular identification of Hysterothylacium aduncum specimens isolated from commercially important fish species of Eastern Mediterranean Sea using mtDNA cox1 and ITS rDNA gene sequences

The presence of a Raphidascarid parasitic nematode Hysterothylacium aduncum (Rudolphi, 1802) in two sparid fish (Sparus aurata and Diplodus vulgaris) and one soleid fish (Solea solea) was investigated in this study. A total of 868 individuals; 385 S. aurata, 437 D. vulgaris and 46 S. solea were collected from the Mersin Bay between February 2013 and January 2014 and examined. Variations in the prevalence, mean intensity, and mean abundance of the parasite were 14.55%, 2.05, and 0.30 for S. aurata, 4.12%, 2.44, and 0.10 for D. vulgaris, and 15.22%, 3.29, and 0.50 for S. sole respectively. Nucleotide sequences of 1398 base pair long fragment of 18S rRNA-ITS1-5.8S rRNA-ITS2-28S rRNA region and 641 base pair long fragment of mtDNA cytochrome c oxidase I (cox1) gene were used in molecular identification of isolated parasites at species level. All the parasite samples were identified as H. aduncum based on nucleotide sequence comparisons. Both ITS rDNA and mtDNA cox1 sequences revealed a genetic variation among H. aduncum specimens isolated from different fish species, while only mtDNA cox1 sequences were indicating a mean genetic distance of 0.010 among H. aduncum specimens of the same host species.

The evaluation of gnathiid (Crustacea: Isopoda: Gnathidae) parasitism in goldblotch grouper (Epinephelus costae Staindahner, 1878) in the northeastern Mediterranean Sea using the self-organizing map (SOM)

The self-organizing map (SOM), which is widely used in economics and engineering applications, is a type of artificial neural network trained without supervision. SOM is used to represent multidimensional data in much lower dimensional spaces—usually in two dimensions (2D)—while preserving the topological properties of the input space. In this study, 2D maps were produced by using SOM to display the relationship between seasons, length, weight, and isopod infestation of goldblotch grouper (Epinephelus costae Staindahner, 1878). This is first study of gnathiid isopod praniza larvae infesting goldblotch grouper (E. costae Staindahner, 1878) in the northeast Mediterranean Sea (36°36′ N–36°07′ E, 35°52′ N–36°25′ E) in Iskenderun Bay. Fish were sampled monthly from Iskenderun Bay for a period of 12 months from 2006 May to 2007 April (Nt = 331,

Accumulation of Some Heavy Metals Seasonally in Hysterotylacium aduncum (Nematoda) and Its Host Red Sea Bream, Pagellus erythrinus (Sparidae) from Gulf of Iskenderun (North-Eastern Mediterranean)

{\hbox{Wt}}\pm {\hbox{SD}}\left( {\hbox{range}} \right) = {392}.{92}\pm {72}.{76}\,{\hbox{g}}\left( {{169} - {927}\,{\hbox{g}}} \right)

Element concentrations in the swimbladder parasite Anguillicola crassus (nematoda) and its host the European eel, Anguilla anguilla from Asi River (Hatay-Turkey)

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Effects of Alternative Dietary Lipid Sources (Soy-acid oil and Yellow grease) on Growth and Hepatic Lipidosis of Common Carp (Cyprinus Carpio) Fingerling: A Preliminary Study

{\hbox{TLt}}\pm {\hbox{SD}}\left( {\hbox{range}} \right) = {3}0.{85}\pm {3}.{88}\,{\hbox{cm}}\left( {{17} - {48}.{3}\,{\hbox{cm}}} \right)