Browsing by Author "Elp M."

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An investigation on systematic history and distribution areas of tarek (Alburnus tarichi (güldenstädt, 1814))
(2021-01-01) Atici A.A.; Elp M.; Sen F.
This study aimed to determine the distribution area of tarek (Alburnus tarichi (Güldenstädt, 1814)) and to define how it must be called according to the scientific name by evaluating its previous studies made by various systematisers and their reports on its distribution, and by comparing literature knowledge. The taxonomic characteristics of the collected samples were evaluated and several measurements and counts were taken on the samples; analfin origin 0-4 scales behind dorsal fin-base; 72-91 lateral line scales; 21-29 gill rakers; 7½-10 branched dorsal-fin rays and 10-12½ branched anal-fin rays. Body and caudal peduncle was moderately compressed. Body was covered by overlapping scales. Tarek has five different populations in the Basin. They are Van, Erçek, Nazik and Aygır Lakes and Koçköprü Dam Lake populations. The main living area of the tarek population is Lake Van; however, between May and June, mature individuals of tarek enter to tributaries of Van Lake. Some of them are Karasu, Bendimahi, Deliçay, Zilan, Karmuç, Sapur, Yanıkçay, Gevaş, Engil, Kurubaş and Akköprü Streams. At the end of study, it was concluded that tarek should be called as Alburnus tarichi (Güldenstädt, 1814) and it is an endemic fish species distributed only in Van Lake Basin.
Antioxidant and immunostimulant responses in rainbow trout (Oncorhynchus mykiss) fed with cherry stem extract
(2022-02-01) Amoush O.A.A.; Bilen S.; Sönmez A.Y.; Elp M.
We examined antioxidant enzyme activities, immune response, blood parameters and growth performance of rainbow trout fed with different doses of cherry stem (CS) aqueous methanolic extract. Four different feeds containing CS extract in different doses, 0% (control), 0.1 (0.1% CS), 0.5 (0.5% CS) and 1% (1% CS), as treatment feeds were prepared. Fish were fed with the diets for 60 days. The results showed that superoxide dismutase (SOD) activity was significantly increased on 20th and 60th days in all CS-treated fish groups. On 40th day, only 0.1% CS fish group had an elevated SOD activity compared with that of control (p < 0.05). Catalase (CAT) was significantly increased on 20th day of the study in 0.1 and 0.5 CS-treated groups compared with control and this increase was observed in all treatment groups on 40th day. However, in all fish groups, CAT was significantly decreased on 60th day. Glutathione peroxidase (GPx) was increased on 20th day in 0.1% CS fish group and in all treatment groups on the 60th day. G6PDH showed no significant difference at the end of experiment compared to the control. Similar result to that of G6PDH was obtained on lipid peroxidation. Haematocrit values of all the CS-treated fish groups were significantly increased at the end of the study. Growth did not differ among fish groups. Results indicated that 0.1% and 0.5% CS could be used as the dietary supplementation in rainbow trout.
Characteristics of Capoeta oguzelii, a new species of cyprinid fish from the Ezine Stream, Black Sea basin, Turkey (Teleostei: Cyprinidae)
(2018-04-03) Elp M.; Osmanoğlu M.; Kadak A.; Turan D.
Four species of Capoeta (C. baliki, C. banarescui, C. sieboldii and C. ekmekciae) have been reported from Black Sea drainages, to date. We recognised an additional species in the Ezine Stream in the Southern Black Sea basin. Based on the analysis of 21 metric and 8 meristic data, we concluded that the Ezine Stream population forms a distinct, unnamed species, which we have described as Capoeta oguzelii sp. n. This species can be distinguished from all other Capoeta species by the following combination of characteristics: small size, presence of only one pair of barbels, absence of a keratinised edge of the lower jaw, a weakly ossified last simple dorsal fin ray, 7–10 gill rakers on the first gill arch and 7½ branched dorsal fin rays. http://www.zoobank.org/urn:lsid:zoobank.org:pub:066CC44A-3806-4DB7-8E88-AD971200E1EE.
Comprehensive natural radioactivity and pollution risk assessments of aquatic media and sediment in Lake Van (Türkiye)
(2023-01-01) Selçuk Zorer Ö.; Yıldız Yorgun N.; Özdemir Ö.F.; Öğün E.; Aydın H.; Atıcı A.A.; Aydın F.; Bora G.; Şen F.; Çavuş A.; Bozlar Pınaroğlu B.; Solmaz H.; Elp M.
This paper studies the radionuclide (137Cs, 226Ra, 232Th, 40K) activity concentrations and gross radioactivities in waters and sediments of Lake Van, which is the third largest closed lake (with no natural or artificial outlet) within the Earth. The physico-chemical parameters were measured and evaluated in the lake waters. The mean gross α activities in surface, middle and bottom waters are 0.04, 0.03 and 0.03 Bq/L, respectively, and in the same order, the mean gross β activities are 0.30, 0.23 and 0.33 Bq/L, respectively. In sediment samples, the mean activity concentrations were measured as 1.98 Bq/g for gross-α, 3.46 Bq/g for gross-β, 48.3 Bq/kg for 226Ra, 32.0 Bq/kg for 232Th, 540.1 Bq/kg for 40K and 25.9 Bq/kg for 137Cs. The radiation hazard parameters values based on the measured activities were calculated and Raeq values are lower than the world average value in all samples, while Dout and AED values are relatively high in some sediment samples.
Distribution of fish species in the Van Lake Basin
(2016-01-01) Elp M.; Atici A.A.; Şen F.; Duyar H.A.
This study was carried out to determine the fish species of Van Lake Basin between in 2008-2012. Van Lake Basin is a closed basin that shaped approximately 2.3 % of Turkey. Because of closed basin character, the differences indicated in species diversity. Basin is rich in endemic species diversity with plant and animal species. This richness were reflected to fish species. All of the fish species naturally occurring in the lake basin are consist of endemic species. Alburnus tarichi, Alburnus timarensis, Barbus ercisianus, Capoeta cosswigi and Oxynoemacheilus ercisianus exhibited a natural distribution. Cyprinus carpio, Carassius gibelio, Gambusia holbrooki and Aphanius mento were constituted population from various water sources. In addition, escaped from fish farm sorvaccinated to water resources Oncorhynchus mykiss was unable to create the population. Barbus ercisianus and Capoeta cosswigi shown to create hybrid fish species in Zilan and Deliçay. Cyprinus carpio and Carassius carassius shown to create hybrid fish species in Nazik Lake.
Drinking water quality properties of Ercis, Van-Turkey
(2016-01-01) Atici A.A.; Gültekin A.; Şen F.; Elp M.
In this study, microbiological, physical, and chemical characters of drinking water supplied from city of Ercis were analyzed. Temperature, turbidity, conductivity, dissolved oxygen, biological oxygen demand, chemical oxygen demand, calcium, magnesium, total hardness, total alkalinity, free chloride, carbonate, bicarbonate, nitrite, nitrate, ammonia, phosphorus, zinc, copper, nickel, cobalt, cyanide, fluoride, aluminum, iron, potassium, manganese, molybdenum, silicon and microbiological parameters were analyzed in the laboratory. The results were evaluated according to “Turkish Regulation of Surface Water Quality Management, Turkish Water Pollution Control Regulations, TS 266, Turkish Regulation on Water Intended for Human Consumption”.
Effect of ferric chloride (FeCl3) concentration on pigmenproduction of Porphyridium Cruentum
(2022-06-01) Erbil G.Ç.; Elp M.; Durmaz Y.
Microalgae are unicellular organisms with different shapes and sizes. Wide range of biomolecules (protein, fatty acids, carotenoids, phycobiliproteins, etc.) could be produced and accumulated by these organisms. P. cruentum is known as a source of high-value biomolecules named phycobiliproteins. These pigments used in various areas such as food, cosmetics, nutraceutical and pharmaceutical industries. In this study, the effect of ferric chloride (FeCl3) concentration (0.234 × 10-5 – 1.17 × 10-5 M) in F/2 medium on growth and pigment composition of P. cruentum was investigated. Using the 0.585 × 10-5 M of FeCl3 (group C) provides higher cell number than other concentrations on P. cruentum culture (P<0.05). The 0.234 × 10-5 FeCl3 was provided the highest phycoerythrin production while the highest cellular phycoerythrin accumulation was obtained with 5.85 × 10-5 FeCl3 concentration. It was found that pigment accumulation was induced by low and high concentrations of ferric chloride. As a result of this study, it was concluded that the ferric chloride could be used as a promoter for pigment accumulation in P. cruentum biomass.
Effects of Total Suspended Solids at Different Levels on the Eggs and Larvae of Endemic Fish, Tarek (Alburnus tarichi Güldenstädt, 1814) in the Karasu River (Van, Turkey)
(2023-01-01) Atici A.A.; Elp M.; Sen F.
Effects on fatty acids, biochemical composition and growth of rotifer (Brachionus plicatilis) fed with different concentrations of Nannochloropsis sp.
(2024-10-01) Osmanoğlu M.İ.; Elp M.; Durmaz Y.
Growth, Blood Parameters, Immune Response and Antioxidant Enzyme Activities in Rainbow Trout (Oncorhynchus mykiss Walbaum, 1792) Fed Diets Supplemented with Fumitory (Fumaria officinalis)
(2023-01-01) Filogh A.; Bilen S.; Sönmez A.Y.; Elp M.
In a feeding experiment for 75 days, the effects of fumitory (Fumaria officinalis) extract on growth, haematology, immune response and antioxidant enzyme activities in rainbow trout (Oncorhynchus mykiss) were evaluated. The aqueous methanolic extract of the plant was mixed with feeds at three different levels, 0.1% (FO1), 0.2% (FO2) and 0.3% (FO3), and feed with no plant extract donated as the control. All four groups (mean initial weight: 13.02 ± 0.02 g) were fed with the prepared diets twice daily ad libitum in a triplicate experiment. Blood and liver samples were taken from the fish on 15, 30, 45, 60 and 75 days. Also, overall growth parameters were determined based on body weight data recorded from all fish before and at the end of feeding trial. Results indicated that there were variations in nonspecific immune parameters (lysozyme, myeloperoxidase and oxidative radical production), but supplementation of the plant extract did not affect the immune response of the fish significantly. On the other hand, there was a general increase in the antioxidant enzyme activities (superoxide dismutase, catalase, glutathione peroxidase, and glucose-6-phosphate dehydrogenase) evaluated in this study. Furthermore, possibly the most remarkable finding of the study is that the growth performance in the FO3 group was roughly 30% higher than that of the control group. Considering all findings in the present study, we conclude that 0.3% supplementation of fumitory extract would be beneficial for rainbow trout farming with respect to elevated growth and antioxidant status.
New records of Pseudophoxinus firati from Turkey (Teleostei: Leuciscidae)
(2019-06-01) Saç G.; Özuluğ M.; Elp M.; Gaffaroğlu M.; Ünal S.; Ayata M.; Kaya C.; Freyhof J.
Pseudophoxinus firati was described from one spring in the upper Euphrates River drainage in Turkey. Here we record this species from seven additional sites, three in the upper Euphrates drainage, one in the upper Seyhan and three in the upper Ceyhan River drainages. These findings largely expand the distribution area of the species and its habitats are discussed.
Phycoerythrin Accumulation of Porphyridium cruentum Culture at Indoor Tubular Photobioreactor
(2022-01-01) Erbil G.Ç.; Elp M.; Durmaz Y.
Microalgae are used in aquaculture and various industrial fields such as pharmaceuticals, feed, food, agriculture, and energy. Microalgae is a potential natural food coloring agent as pigments and contain bioactive components such as polyunsaturated fatty acids (PUFA) in their composition. Porphyridium cruentum is a red alga with the ability to accumulate valuable pigments biomolecules such as phycoerythrin (PE), chlorophyll, and other carotenoids. In this study, P. cruentum was cultured for 51 days at the indoor pilot scale tubular photobioreactor (PBR). The highest cell number was 31.84 x 106 cells mL-1 and the highest specific growth rate was determined as 0.80. Total phycobiliprotein and phycoerythrin amounts were reached 0.252 ± 0.009 mg mL-1 and 0.224 ± 0.007 mg mL-1 at the early exponential phase, respectively.
Strontium isotopes in otoliths reveal a diversity of natal origins for Tarek (Alburnus tarichi) in Lake Van, Turkey
(2022-11-01) Saygın S.; Polat N.; Willmes M.; Lewis L.S.; Hobbs J.A.; Atıcı A.A.; Elp M.
Understanding the relative contributions of different spawning habitats to adult fish populations is central to effective fisheries management and species conservation. The Tarek (Alburnus tarichi) is an adfluvial cyprinid that is endemic to the alkaline-saline waters of Lake Van, Turkey. Tarek are culturally and economically important to the region, and also threatened by anthropogenic impacts, including poaching, dams, water diversions, pollution, and habitat degradation. Here we analyzed otoliths from 120 adult fish caught in Lake Van in 2016–2017 to reconstruct the age structure and natal origins of this Tarek population. Ages ranged from 2 to 10 years, with most fish belonging to the 2011–2014 cohorts (age 3–5). We analyzed strontium isotope ratios from water samples collected in 2016 and 2018 to build a baseline map and then used linear discriminant function analysis to classify Tarek to their likely natal origins. We found that adult Tarek originated from at least 7 different major tributaries of Lake Van, with a majority of fish originating from the Gevas and Engil tributaries in the south. Furthermore, the relative contributions of fish from each tributary varied among years, suggesting that a mosaic of natal habitats may be important for population stability. These results suggest that protection of all Lake Van watersheds from anthropogenic disturbance could be valuable for maintaining the stability of the Lake Van Tarek population and fishery.
The effects of sand pits and sand extractions region on Karasu Stream (van) to water quality criteria
(2018-01-01) Atici A.; Elp M.; Sen F.
In this study, physical, chemical and microbiological parameters were analyzed in water samples in order to determine the effects of sand pits and sand extraction in Karasu Stream. The water quality data were collected monthly between June 2014 and May 20'6 from five sampling stations distributed along the stream and 39 parameters were examined such as dissolved oxygen, dissolved oxygen saturation, temperature, pH, electrical conductivity, flow, total suspended solids, turbidity, chlorine, calcium, magnesium, total hardness, carbonate, bicarbonate, total alkalinity, nitrate, nitrite, ammonium, ammonia, orthophosphate, total phosphor, sulfate, cyanide, silicon, silicon dioxide, biological oxygen demand, chemical oxygen demand, fluoride, fecal coliform, copper, aluminum, zinc, chromium, manganese, iron, molybdenum, cobalt, nickeland sediment accumulation. Turkish, EU and WHO water quality standarts were used in the evaluation of the results. Sand pits, sand extractions and the pollution caused by the settlement around the stream ruined the water quality of the stream and threatened the lives of the fish living in Karasu.