Erhan Unlu

Erhan Unlu
Dicle University · Department of Biology

Prof.

About

88
Publications
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4,118
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January 1980 - present
Dicle University
Position
  • Professor (Full)

Publications

Publications (88)
Article
Full-text available
In this study, individuals of Carassius gibelio (Bloch, 1782) comprising 85 females and 34 males were collected from the Tigris River in Şırnak, Turkey. The size and shape of the scales were analyzed separately using 2D geometric morphometric methods, with scale size treated as the center size. Procrustes ANOVA indicated significant differences bet...
Article
This study was designed to investigate the toxic effects of two frequently used commercial insecticides containing endosulfan and indoxacarb on a freshwater amphipod Gammarus kischineffensis. In this context, the 24, 48, 72 and 96 h LC50 values of these pesticides were determined for G. kischineffensis. Then the histopathological effects of these p...
Article
Full-text available
In this study, the Tigris bream Acanthobrama marmid individuals (44 females and 31 males) were captured from the Tigris River. The scale size (as centroid size) and shape were analyzed separately using 2–dimensional geometric morphometric methods. Procrustes ANOVA revealed significant differences in scales size between sexes, while no difference in...
Article
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The historical Hevsel Gardens in Diyarbakır, Turkey, was registered as a UNESCO cultural heritage site in 2015. The biodiversity of the habitats was revealed by compiling the inventory obtained from the field studies in the Hevsel Gardens, and its surroundings, including the Tigris River between 2002-2021, and from the literature containing studies...
Article
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A Study on The Reproductive Characteristics of Capoeta trutta (Heckel, 1843) From the Ataturk Dam Lake Atatürk Baraj gölündeki Capoeta trutta (Heckel, 1843)’nın üreme özellikleri üzerinde bir araştırma.
Article
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The Biology of the Chub, Leuciscus cephalus in Çat Dam Lake, Euphrates, Turkey.
Article
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This study examines the shape of scales from eleven fish species belonging to four fish families to infer whether the family, species and the geographic origin of fishes could be determined using scale shape. Site differentiation was analyzed only for the Cyprinidae since from the five species of this family three occurred in New Zealand and two in...
Article
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The Ilisu Dam is a large hydroelectric power plant that started to collect water in 2019 on the Tigris River in Turkey. This study was done during the period 2010 to 2014 to determine fish fauna of the Tigris River and its tributaries related to the potential reservoir area of the Ilisu Dam before its foundation. 35 fish species belonging to 10 fam...
Article
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In the present study, fish species and their current status in Şanlıurfa Balıklıgöl, which has a sacred importance, are discussed. 4 species belonging to the families Leuciscidae (Alburnus caeruleus) and Cyprinidae (Carasobarbus luteus, Capoeta umbla and Garra rufa) were determined in Balıklıgöl. In addition, among the fish species Cyprinus carpio...
Article
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Some heavy metals (Co, Cu, Mo, Ni, Pb, V and Zn) were determined in water, sediments and some fish species (Cyprinion macrostomus and Garra rufa) from the Tigris River. Mo and V were not detected in water and Co, Cu, Ni, Pb, Zn were found low values. Co, Cu, Ni, Pb, V and Zn were found very high levels in the sediments. All the fish samples contain...
Article
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Maturity, growth and reproductive characteristics of the mossul bleak Alburnus mossulensis, from Ataturk Dam Lake (Euphrates) were assessed. Maturity composition of the analysed samples varied between age groups I and VII. The ratio of females to males was 1.047:1. Fork length of the samples varied between 40-198 mm and weights were in the range of...
Article
The morphological study of the axial skeleton of the nine species of the genus Carasobarbus Kara-man, 1971 enabled to confirm the division of this bony structure into five morphologically distinct regions. This regionalization shows higher level of complexity than the division between abdominal and caudal regions. New characters were valuable in th...
Article
In this study, sex composition, spawning period, fecundity and sexual maturity of the gibel carp, Carassius gibelio (Bloch, 1782), an invasive species in the Atatürk Dam Lake, on Euphrates River,Turkey were studied. C. gibelio specimens were analysed from Ataturk Dam Lake and the percentage of the males and females was 45.55% and 55.45% respectivel...
Article
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A renewed interest in fish scale anomalies prompted the present study, wherein we document a wide range of scale morphological abnormalities, including deformities in shape and structure, of a large number of species. In the present study, 63 cases of deformities were reported from 23 fish species collected from five countries. The abnormalities ob...
Article
In this study, the differences between C. macrostomus and C. kais species that are similar to each other were investigated in terms of their size (CS) and shape by landmark-based geometric morphometric methods. There was no difference in size between the two species. However, the difference was significant between them in shape. The head of C. macr...
Article
Full-text available
This study was carried out to determine some biological characteristics including age, growth and somatic condition of Carasobarbus luteus and Capoeta trutta in the Turkish part of the Tigris River. The examined samples of C. luteus were distributed between II-IX years of age. The length-weigth relations of females and males were calculated as Log...
Article
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In this study, morphometric and meristic characteristics of Cyprinion kais samples which is obtained from different locality in Tigris River were carried out. In order to determine the morphological and meristic variation among populations, discriminant function can be detected, intergroup discrimination with the help of this function are the most...
Article
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The big-scale sand smelt, Atherina boyeri, is recorded from the Devegecidi Dam Lake in 2016, the first record of this invasive species in the Tigris River basin, with potential to extend to all countries in the Middle East. The smelts were caught with a trawl net mesh size of 6 mm. The captured specimens are described and compared. Records of A. bo...
Article
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Freshwater fish take up salts from their ambient medium to compensate their loss through excretion. This obviously necessitates a high metabolic demand for the regulation between the energetic and osmoregulation in aquatic animals. Sodium, potassium and calcium are not only important for the maintenance of osmoregulation of body fluids but also for...
Article
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Objective: To determine morphometric and meristic variations between Garra rufa (G. rufa) samples obtained from different locality in Tigris River. Methods: Transformed morphometric characters were subjected to discriminant analysis and according to grouping model, number of discriminant function and morphologic variation between populations with r...
Article
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Immunological biomarkers reflect the effects of exposure to environmental contaminants. In this study, the suitability and sensitivity of cytokine responses, interleukin1b (IL-1b), interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-a) in gill tissues of Capoeta umbla (Heckel, 1843), collected from different regions, as early warning indices of...
Article
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This study was carried out to determine the reproductive characteristics of two species of Cyprinidae, Longspine scraper, Capoeta trutta (Heckel, 1843) and Mesopotamian himri, Carasobarbus luteus (Heckel, 1843) in the Tigris River of Turkish part. A total of 307 C. luteus (138 females and 169 males) and 394 C. trutta (269 females and 125 males) spe...
Article
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In this study, the shape and size differences between 30 samples of Garra rufa and Garra variabilis species captured in Tigris River were investigated by using geometric morphometric methods. According to the results of this study, there is no difference between these two species in terms of size (CS); however, they are quite different from each ot...
Article
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The fishes of the upper basin of the Tigris River have been surveyed between June 2006 and November 2015. During this survey 40 fish species were determined belonging to 10 families (Cyprinidae, Nemacheilidae, Sisoridae, Siluridae, Heteropneustidae, Bagridae, Salmonidae, Mugilidae, Poeciliidae, Mastacembelidae). One species was not fully identified...
Conference Paper
Full-text available
Germiap kaplıcası, Mardin’in Dargeçit ilçesinin 18 km doğusunda Ilısu Baraj’nın hemen dibinde Dicle nehri kenarında yer alan termal su kaynağıdır (N= 37,52434° E=041,84519° Yükseklik: 447 m). Bu çalışmada üzerinde çok az bilgi olan Germiap kaplıcasının fiziko-kimyasal ve mikrobiyolojik özelliklerinin ortaya çıkartılması amaçlanmıştır.
Conference Paper
Full-text available
Carassius gibelio (L.) is an invasiv freshwater fish species living in the Atatürk Dam Lake which is the largest dam of Turkey. The species impacts on native species and demonstrated or suspected alteration to aquatic ecosystem food webs and function. In this study, sex composition, sexual maturity age, spawning period and fecundity of Carassius gi...
Article
The aim of this work was to determine the seasonal changes in the activities of selected biomarkers in Capoeta umbla (Heckel, 1843) caught from Uzuncayir Dam Lake (Tunceli, Turkey) and to evaluate the effects of environmental factors on these activities. Fish were sampled on seasonal basis, and superoxide dismutase, catalase, glutathione peroxidase...
Article
Full-text available
In this study, by examining the character of the morphometric and meristic in which Cyprinion macrostomus samples obtained from different locality in Tigris, morphometric character which are transformed subject to discriminant analysis and depending on grouping model to number of discriminant functions and according to importance of these totally v...
Article
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Biomarkers of Susceptibility/Oxidative Biomarkers. Two papers have been published in this category. One paper deals with perfluorooctanoic acid (PFOA), which is widely present in the environment. Oxidative stress induced by PFOA on mice was evaluated by malondialdehyde (MDA) formation and hydrogen peroxide generation, which were considered as relia...
Article
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Introduction of a new species to a new habitat may lead to a catastrophy. Prussian carp Carassius gibelio (Bloch,1782), by its high reproduction capacity by means of gynogenesis and tolerance to environmental changes, considered as asuccessfull invasive. It can become the dominant species in new habitat in a short time with the help of these attrib...
Article
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In this study, the river Munzur, the river Pulumur, and Uzunçayır Dam Lake, ten sampling stations have been identified. For each station, in January, March and May, sulphate concentration was measured. For 120 days, every station, changing the concentration of sulphate, has been considered as the first-order reaction kinetics. Accordingly, the reac...
Article
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Fish biodiversity in inland waters of Turkey has been prepared by reviewing of recent records. First review of systematic status for Turkey fish fauna dealt with between the years of 1856 and 2004, and about 236 fish species were listed in the inland water of Turkey (Kuru 2004). In this study; a total of 371 fish species belonging to 27 families an...
Article
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Abstract Fish biodiversity in inland waters of Turkey has been prepared by reviewing of recent records. First review of systematic status for Turkey fish fauna dealt with between the years of 1856 and 2004, and about 236 fish species were listed in the inland water of ...
Article
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Accumulation of metals by aquatic organisms is mostly affected by other biological components in environments. In this study, cadmium (Cd) accumulation in green algae, Cladophora glomerata (L.) Kutz., exposed to 0.1 and 1.0 mg L−1 of Cd for 15 and 30 days was examined in laboratory conditions in the presence of Nile tilapia Oreochromis niloticus (L...
Conference Paper
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This report, in its main body and appendixes, provides an overview of the state of fisheries and aquaculture in the Euphrates–Tigris Basin, including country-level overviews for Iraq, the Syrian Arab Republic and Turkey, as well as the summary record of an expert meeting held in Erbil, Iraq, in 2012, and the outcomes. A list of species for the Euph...
Article
In this study, some morphological and anatomical characteristics of Silurus triostegus from Tigris and Euphrates Rivers and Silurus glanis from several lakes and Rivers of Turkey were investigated. Although, S. Triostegus has two mandibular barbels, usually in the young specimens there are four mandibular barbels, sometimes 3 mandibular barbels. Th...
Article
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The seasonal effects on the fatty acid composition of total lipid, triacylglicerol and phospholipid in the dorsal muscle of Silurus triostegus were determined by gas chromatographic (GC) method. The total polyunsaturated fatty acids (PUPA) and monounsaturated fatty acids (MUFA) were the most important groups of total lipid and statistically ranged...
Article
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The effects of seasonal variation on the fatty acid composition of total lipid, triacylglycerol, and phospholipid in the dorsal muscle of Capoeta trutta were assessed by gas chromatographic method. A total of 18 different fatty acids were determined in the composition of C. trutta. The variations in fatty acid composition of total lipid, triacylgly...
Article
In this study, some morphological and anatomical characteristics of Silurus triostegus from Tigris and Euphrates Rivers and Silurus glanis from several lakes and Rivers of Turkey were investigated. Although, S. Triostegus has two mandibular barbels, usually in the young specimens there are four mandibular barbels, sometimes 3 mandibular barbels. Th...
Article
Full-text available
This study was conducted to identify physico-chemical characteristics of water of Uzuncayir Dam Lake, Tunceli. The aim of building of the dam lake was electric supply. During the study, the water samples were taken periodically from ten choosen stations in every two months. The measured data were given as following (minimum, average and maximum) fo...
Article
Full-text available
This study was conducted to identify physico-chemical characteristics of water of Uzuncayir Dam Lake, Tunceli. The aim of building of the dam lake was electric supply. During the study, the water samples were taken periodically from ten choosen stations in every two months. The measured data were given as following (minimum, average and maximum) fo...
Article
Full-text available
Analysis of mitochondrial cytochrome b sequences from 198 species confirms the position of Barilius mesopotamicus as a species of the Asian genus Barilius within the subtribe Chedrina in the subfamily Danioninae. This relationship is sup-ported by a parsimony analysis based on 43 morphological characters, and the morphological examination confirms...
Article
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In this study, the age, growth and reproduction characteristics of Aspius vorax, which were caught from Atatürk Dam Lake (Euphrates River) between September 2007 and August 2008 were determined. The age composition of the specimens ranged between II and IX age groups. The observed sex ratio was 1:1.75 (females/males). The fork length and weight of...
Article
Full-text available
Fatty acid compositions of total lipids in the muscle of 9 freshwater fish species were examined via gas chromatography. Palmitic acid and oleic acid were the predominant saturated (SFA) and monounsaturated fatty acids (MUFA) in all the species analyzed. The highest value of total SFA was detected in Liza abu (48.94%). Alburnus mossulensis had the...
Article
Full-text available
Fatty acid compositions of total lipids in the muscle of 9 freshwater fish species were examined via gas chromatography. Palmitic acid and oleic acid were the predominant saturated (SFA) and monounsaturated fatty acids (MUFA) in all the species analyzed. The highest value of total SFA was detected in Liza abu (48.94%). Alburnus mossulensis had the...
Article
Full-text available
The histopathological effects of dichlorvos, an organophosphate pesticide, on the gill and liver tissues in Cirrhinus mrigala were determined by light microscopy. The fishes were exposed to sublethal concentrations (0.91 and 1.82 ppm) of dichlorvos for 10 days with parallel untreated control. No histopathological effects were observed in control gr...
Article
The objective of this study was to investigate the effects of ascorbic acid on the toxicity of cypermethrin's on histopathological lesions in tissues and protein, glycogen levels in Oreochromis niloticus. Nile tilapia was exposed to 0.22 and 0.44 μg/l cypermethrin+control diet, 0.22 and 0.44 μg/l cypermethrin+ascorbic acid supplemented diet for 20...
Article
Accumulation of cadmium (Cd) was determined in the muscle and gill tissues of Nile tilapia Oreochromis niloticus (L.) exposed to sublethal concentrations of Cd (0.1 and 1.0 mg/L) under laboratory conditions for 15 and 30 days, in the absence or presence of green algae Cladophora glomerata (L.) Kutz. Results showed that muscles, irrespective of trea...
Article
The histopathology of lambda-cyhalothrin, a synthetic pyrethroid pesticide, on the gill, liver, intestine and kidney tissues in fish, mrigal (Cirrhinus mrigala), which is one of Indian major carp species were determined by light microscopy. The fish were experimentally exposed to sub-lethal concentrations (0.3ppb and 0.6ppb) of lambda-cyhalothrin f...
Article
Full-text available
In this study concentrations of heavy metals, such as Cd, Co, Cu, Fe, Mn, Ni, Pb and Zn were determined in water, sediment, muscle, liver and gill of fish (Silurus triostegus, Mastacembelus simack, Mystus halepensis, Orthrias euphraticus) the muscle and liver of crab (Potamon fluviatilis), the internal organs of fresh water snail (Physa acuta), and...
Article
The histopathological effects of monocrotophos on the gill, kidney and intestine tissues of the Cirrhinus mrigala were determined by light microscopy. The changes in the gills were characterized by epithelial hyperplasia, aneurysm, epithelial necrosis, desquamation, epithelial lifting, oedema, lamellar fusion and curling of secondary lamellae. Pycn...
Article
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The histopathological changes of fenvalerate on the gill, kidney, liver and intestine tissues of the Cirrhinus mrigala were determined by light microscopy. The fish were exposed to two sub-lethal concentrations of fenvalerate (1.5-3.0 ppb). The most common gill changes at all concentrations of fenvalerate were epithelial hyperplasia, epithelial nec...
Article
The histopathological effects of deltamethrin on the gill, liver and gut tissues of the mosquitofish, Gambusia affinis were determined by light microscopy. The fish were exposed to two sublethal concentrations of deltamethrin (0.25-0.50μg/l) for periods of 10, 20 and 30 days. The most common gill changes at all doses of deltamethrin were desquamati...
Article
Histopathological alterations induced by Thiodan in three tissues, namely, digestive gland, foot and mantle, of the freshwater snail Lymnaea stagnalis were investigated. Specimens of Lymnaea stagnalis were exposed to 0.36% and 0.72% Thiodan 35 EC, a commercial grade of endosulfan, for 96 h followed by a recovery period of 30 days. Thiodan caused si...
Article
Histopathological alterations in three tissues, namely, digestive gland, foot and mantle of the freshwater snail Galba truncatula induced by Thiodan 35 EC, a commercial preparation of endosulfan, were studied in the laboratory. The snails were exposed to five sublethal concentrations of Thiodan, two of them higher concentrations at 0.33% and 0.65%...
Article
In this study the great ramshorn snail (Planorbarius corneus), one of the most abundant gastropod of Turkish limnic systems, was investigated to determine the histopathological effects of endosulfan on the digestive gland, foot and mantle under laboratory conditions. Samples were collected from small artificial pools in Karaot at Gelendost-Isparta...
Article
The distribution of some heavy metals in three different organs of mullet, Liza abu, and catfish, Silurus triostegus, from Atatürk Dam Lake located on Euphrates (Turkey) was studied. Co and Mo concentrations were below limits of detection in all fish organs, whereas Ni was also below limits in organs of mullet. The metal accumulation in the liver a...
Article
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Chromosome numbers and karyotypes of Cyprinid fish Alburnoides bipunctatus (Bloch, 1,782) from the River Tigris were determined by the chromosome preparation technique from uncultured kidney cells. The diploid chromosome number 2n=50, was composed of 8 pairs of metacentric, 11 pairs of submetacentric and 6 pairs of subtelo-acrocentric chromosomes (...
Article
The histopathological effects of malathion, an organophosphate pesticide, on the gill tissues in mosquitofish, Gambusia affinis, were determined by light microscope. The fish were exposed to sublethal concentrations (0.01 and 0.02 mg/L) of malathion for 10, 20 and 30 days. Histological examination of the gills treated with malathion showed a variet...
Article
Phylogenetic relationships of 64 freshwater Barbus s.s. species distributed in basins around the Mediterranean Sea were assessed using cytochrome b sequences. Our results are in concordance with previous morphological and genetic studies, which proposed that these species belong to two major lineages (or subgenera): Barbus and Luciobarbus. We were...
Article
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The phylogenetic relationships of cyprinid species from the Middle East and neighboring biogeographical areas were investigated using cytochrome b sequence variation in order to test hypotheses that consider the Middle Eastern area as an important interchange area or a center of speciation for the freshwater fauna. A total of 62 cyprinid species we...
Article
Thiodan (33.7% endosulfan), a polychlorinated cyclodiene insecticide, was evaluated for its histopathological effects on mosquitofish, Gambusia affinis, by light microscopy. Fish were exposed to doses of 0.00 (control), 1.00, 2.50, and 5.00 microg/L on days 7, 14, 21, and 30. No histopathological effects were apparent at control group. The histopat...
Article
Full-text available
In this study, some biological characteristics such as age and sex composition, growth in length and weight, age-length, age-weight and length-weight relationships, condition factor spawning time, age of sexual maturity, and fecundity of Silurus triostegus in Atatürk Dam lake were investigated. The percentage of females was 48.3% and that of males...
Article
Full-text available
Copper and zinc were determined in the water and freshwater fish (Carasobarbus luteus) from the Tigris River, and its surrounding soils, wheat and mushrooms by using a Jobin Yvon model 24 Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES). The average contents of Cu and Zn in the river water, were found 0.03 mg L-1 and 0.14 mg L-1, a...
Article
Concentrations of heavy metals (Cd, Co, Cu, Fe, Hg, Mn, Mo, Ni, Pb and Zn) were measured in the water, sediment and fish species (Acanthobrama marmid, Chalcalburnus mossulensis, Chondrostoma regium, Carasobarbus luteus, Capoetta trutta and Cyprinus carpio) from the Atatürk Dam Lake, Turkey. Among the heavy metals studied Cd, Co, Hg, Mo and Pb were...
Article
Full-text available
The phylogenetic relationships of 492 chub (Leuciscus cephalus) belonging to 89 populations across the species' range were assessed using 600 base pairs of cytochrome b. Furthermore, nine species belonging to the L. cephalus complex were also analysed (over the whole cytochrome b) in order to test potential allopatric hybridization with L. cephalus...
Article
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Sex distribution, growth in length and weight, relative condition index, attainment of first maturity age, and fecundity of Liza abu were examined in the Tigris River, South-eastern Anatolia, This species migrates towards upstream the Tigris River at a period extending from August to late February. The age of 480 specimens (263 females and 217 male...
Article
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Albumus baliki, new species, from the Manavgat River basin, South Anatolia, Turkey, is distinguished from its congeners by a suite of characters unique within Albumus including a reduction of scale size, an irregular scale pattern, a lack of pelvic axillary scales, and a low total vertebral number (commonly 19+17-18).