Gillnets Selection of Alburnus chalcoides (Güldenstädt, 1772) in Almus Dam Lake (Tokat, Turkey)

In this study gill-net selectivity for Alburnus chalcoides inhabiting the Almus Dam Lake was estimated. Experimental gill-net fishing was conducted using gill-net with 15 mm and 20 mm mesh-size, during October 2002 and September 2003. A total of 254 and 198 specimens of A. chalcoides were caught by gill-net with 15 mm and 198 with the 20 mm mesh-size, respectively. The total length of the fish ranged from 10.5 cm to 21.5 cm for 15 mm mesh-size and 13.6 cm to 25.6 cm for 20 mm mesh-size. Mean total lengths were calculated as 14.34 ± 1.52 cm and 17.85 ± 1.97 cm for 15 mm and 20 mm mesh-size, respectively. Selectivity analysis indicated an optimum length (100% probability of retention) of 14.77 cm for the 15 mm mesh size and 19.69 cm for the 20 mm mesh size gill-nets. Selectivity Factor was calculated as 0.9846. The vast majority (81%) of fish caught by 15 mm mesh size and 20 mm mesh size were mature. Therefore, both the 15 mm and 20 mm mesh size were suitable for the sustainable fisheries of A. chalcoides in the Almus Dam Lake

Oxynoemacheilus veyseli, a new nemacheilid species from the upper aras river drainage of Turkey (Teleostei: Nemacheilidae)

A new species of nemacheilid fish, Oxynoemacheilus veyseli sp. n., is described from the upper Aras River drainage, Kars Province, Turkey. The species differs from its congeners in the Caspian Sea basin in the combination of the following characters: flank with a set of mid-lateral elongated, irregular-shaped dark brown blotches, sometimes fused, interrupted by lateral line; dorsum with three or four separated dark-brown roundish to elongated blotches predorsally and postdorsally; a deep and marked suborbital groove and many small unculi on rays of pectoral and dorsal-fin in male; small eye diameter (9.6-13.7 %HL); a short dorsal-fin base (10.1-13.3 %SL); 3-4 lateral and 3 central pores in supratemporal canal; deep body and caudal peduncle (17.3-19.4 and 10.2-11.4 %SL, respectively) and slightly emarginated caudal fin

Freshwater fishes of Turkey; a revised and updated annotated checklist

The current status of the inland waters ichthyofauna of Turkey is revised, and an updated checklist of the freshwater fishes is presented. A total of 368 fish species live in the inland waters of Turkey. Among these, 3 species are globally extinct, 5 species are extinct in Turkey, 28 species are non-native and 153 species are considered as endemic to Turkey. We recognise pronounced species richness and a high degree of endemism of the Turkish ichthyofauna (41.58%). Orders with the largest numbers of species in the ichthyofauna of Turkey are the Cypriniformes 247 species), Perciformes (43 species), Salmoniformes (21 species), Cyprinodontiformes (15 species), Siluriformes (10 species), Acipenseriformes (8 species) and Clupeiformes (8 species). At the family level, the Cyprinidae has the greatest number of species (188 species; 51.1% of the total species), followed by the Nemacheilidae (39), Salmonidae (21 species), Cobitidae (20 species), Gobiidae (18 species) and Cyprinodontidea (14 species)

A taxonomic evalution of Alburnus sellal heckel, 1843 and alburnus adanensis Battalgazi, 1944: Based on morphological characters and mitochondrial DNA sequences

Alburnus sellal inhabits Ceyhan, Euphrates, Orontes and Tigris river basins whereas Alburnus adanensis is geographically restricted to Ceyhan and Seyhan river basins. Due to the very similar morphometric and meristic characteristics, discrimination of these two species is difficult. The most important diagnostic character is the scale numbers in lateral line (73-80 in A. sellal vs 60-66 in A. adanensis) and pronounced lack of the dark grey band on side of the body. In order to clarify the taxonomic status of the A. sellal and A. adanensis, a total of 27 morphological characters and the nucleotide sequence variation of mitochondrial cytochrome b (cyt b) and cytochrome oxidase I (COI) genes were analyzed on the specimens which were from Seyhan, Ceyhan, lower Euphrates and Orontes river basins. The results show high similarity between A. sellal and A. adanensis based on the morphometric and the morphological characters using Principal Component Analyses (PCA). In addition genetic distance of the specimens belonging to two species between 0.000 to 0.011 using COI and cyt b genes sequences. Therefore, our results based on morphology, molecules and nomenclatural priority pointed out that A. adanensis should be evaluated as a synonym of A. sellal.Nevsehir Hacı Bektas Veli University, Scientific Research Project

Sosyal Medya Kullanıcılarının Siyasal Bilgilenme Sürecindeki Haber Alma Durumlarına Yönelik Türkiye Geneli Saha Araştırması

Siyasal bilgilenme sürecinde katılımcıların sosyal medya kullanımının belirleyen olup olmadığı temel sorunsalından hareketle başlayan çalışmamız, bunun Türkiye’deki görünümüne odaklanmaktadır. Sosyal medya, birçok konuyu bünyesinde bulundurabilmektedir. Siyaset ile ilgili haberler söz konusu olduğunda, sosyal medyanın temel bir bilgi edinme kaynağı olduğu düşünülmektedir. Bu düşünceden hareketle ve sosyal medyanın siyasal bilgilenme noktasındaki etkinliğini anlayabilme amacıyla yola çıkılan araştırmamız, genel tarama kimliği taşımakta ve Türkiye’deki sosyal medya kullanıcıları özelinde yürütülmektedir. Evrenini tüm Türkiye’nin işaret ettiği 1076 kişilik belirlenen örneklem dahilinde yürütülen saha araştırması, mevcut durumun fotoğrafını sunma niyetindedir. Edinilen veriler, sosyal medyaya duyulan güvenin zayıf olduğunu düşündürse de, bireyin siyasal bilgilenme amacıyla bu ortamlara başvurduğunu belgelemektedir. Nihai olarak; sosyal medyanın siyasal bilgilenme sürecinde etkin bir belirleyen olarak konumlandığını belgeleyen çalışmamız, Türkiye’deki kullanıcılar arasında söz konusu medya ortamının büyük öneme sahip olduğu düşüncesini de genellemektedir

Catch Composition of the bottom trawl fishery along the Coasts of Karataş-Adana (Northeastern Mediterranean Sea)

The catch composition of the bottom trawl fishery along the coasts of Karataş was evaluated in the 2002-2003 fishing season. A total of 110 species were registered, the fishes showed the highest diversity (90 species) followed by 15 crustaceans species and 5 species of cephalopods. The highest catch per unit effort (CPUE) value (66.8 kg h-1) was recorded in September when the fishing season was opened and decreased to the lowest value in March (12.5 kg h-1). The average CPUE was 26.3 ± 18.9 kg h-1. The result showed that catch of fish decrease with increasing depth. The highest fish catch (47.42%) was found in 0-20 m depth range. 35.58 percent of the catch was between 20-50 m, and 17.00% between 50-100 m depth. Lessepsian fish comprise 18.90% of all fish in terms of the number of species and 26.66% of the total fish catch

Relationship between cortisol and glucose as physiological stress indicators during growth season in juvenile Siberian sturgeon Acipenser baerii

The relationship between cortisol and glucose was studied in two-year old farmed Siberian sturgeon Acipenser baerii with a body weight of 340±30 g (mean ± SD) and total length of 45±1 cm from August to November 2017. Thirty-six individuals were randomly selected and stocked in some 3×300 L fiberglass tanks. Blood samples were collected monthly from the tagged fish. The mean cortisol in August, September, October and November were 4.7±0.9, 23.5±3.0, 6.3±0.9 and 7.4±0.9 ng mL–1 respectively whereas glucose concentrations were 44.6±0.4, 27.3±0.6, 49.2±0.7 and 48.5±0.7 mg dL–1 respectively indicating a significant increase in cortisol and decrease in glucose in September, may be due to the exposure to prolonged high temperature (26–28.5°C). Although it was expected to happen naturally due to hyperglycemia of cortisol but no such phenomena was detected. Our results suggest that the consumption of glucose for maintenance of homeostasis and physiological status is a mechanism against the non-optimal thermal regime. This mechanism consumes glucose at a rate higher than that produced by cortisol, causing significant decrease of plasma glucose. In general, there was a reverse relationship between cortisol and glucose concentration during the experiment in Siberian sturgeons

H1N1 virüs enfeksiyon nedeniyle meydana gelen myokardit

A 25-year-old male patient, applied to emergency department with complaints of fever lasting for 3 days, non-productive cough and tachycardia. Troponin I level was 18 ng/ml. The patient had no previously known disease and was hospitalized in coronary intensive care unit. We presented a case of acute myopericarditis occurred after an acute influenza infection, caused by H1N1 virus that recently led to pandemics worldwide

New localities of scardinius elmaliensis bogutskaya, 1997 (Teleostei: Cyprinidae) and its phylogenetic relationship based on mt DNA cytb region sequences

This study was conducted to report five new localities out of its type locality for Scardinius elmaliensis in the Western Mediterranean Basin of Turkey by providing their morphological characteristics, and their phylogenetic relationship based on mtDNA Cytb region. The results revealed significant differences of all studied populations in terms of the morphometric characters despite their low genetic differences, but their meristic characters were not different. All six studied populations of S. elmaliensis including that of type locality formed a monophyletic group with S. erythrophthalmus as sister group. The molecular result confirmed distinction of S. elmaliensis from S. erythrophthalmus based on Cytb genetic distance of 1.6-1.8%. The occurrence of S. elmaliensis out of type locality was firstly reported in this study. Such knowledge is important for future conservation strategies and habitat management of this species