Yazar "Şahin, Fatih" seçeneğine göre listele
Listeleniyor 1 - 18 / 18
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Acute Toxicity of Cadmium on Ophelia bicornis Savigny, 1822(2019) Bat, Levent; Şahin, Fatih; Öztekin, AyşahStatic bioassays to assess acute toxicity of cadmium on Ophelia bicornis were first time conducted. Organisms wereexposed to the different concentrations of cadmium for 24, 48, 72 and 96-hr. The LC50 values for 24, 48, 72 and 96-h with95% confidence limits were estimated by the probit method and were found as 26 (22.8-29.4), 18 (15-22), 12 (9.1-14.4) and7.2 (6.8-7.5) mg/l for Group 1 (15 and 25 mm in length) and 28 (24.6-33.8), 24 (22.4-25.5), 18 (16.1-19) and 8.7 (7.8-9.6)mg/l for Group 2 (26 and 36 mm in length), respectively. Toxicity of Cd was dependent on concentration and exposure time.LC50 increased with increasing the length of organisms. Mortality of O. bicornis was increased by Cd concentration andexposure. Results showed that O. bicornis was sensitive to cadmium.Öğe Biological Diversity of the Turkish Black Sea Coast(Turkish Journal of Fisheries and Aquatic Sciences, 2011) Bat, Levent; Sezgin, Murat; Satılmış, Hasan Hüseyin; Şahin, Fatih; Üstün, Funda; Özdemir, Zekiye Birinci; Baki, Oylum GökkurtIn this review a comprehensive biodiversity characteristic of the Black Sea is given. A brief historical survey of the investigations on the biodiversity of the Black Sea coast is followed by the data about the present status of the Turkish Black Sea marine biodiversity. Additional data about the density, biomass and distribution of the widespread Black Sea inhabitants are also given. The impact of the invasive species on the Black Sea ecosystem and some ecological problems to the Black Sea biodiversity are discussed.Öğe Determination of Heavy Metals in Some Commercial Fish from the Black Sea Coast of Turkey(Walailak Journal of Science and Technology, 2013) Bat, Levent; Sezgin, Murat; Baki, Oylum Gökkurt; Üstün, Funda; Şahin, FatihIn this study analysis of zinc, copper, lead and cadmium in six of the most commercially important fishes (Trachurus trachurus, Belone belone, Pomatomus saltatrix, Mullus barbatus, Merlangius merlangus euxinus and Engraulis encrasicolus) of the Black Sea coastal waters are presented. The results showed that the Zn concentrations were the highest and Cd concentrations the lowest in edible tissue of the six species. The muscle concentrations of Zn, Cu, Pb and Cd ranged from 6.95 - 34.33, 0.19 - 7.74, 0.02 - 1.51 and 0.02 - 0.18 ppm, respectively. Significant differences in metal concentrations were found between the species (P < 0.05). Higher muscle concentrations of Zn and Cd were found in Merlangius merlangus euxinus than the other species and the lowest concentration of Pb. However, Mullus barbatus contained the highest concentration of Cu and the lowest concentration of Zn and Cd. The highest concentration of Pb was found in Pomatomus saltatrix. In general, the concentrations of these heavy metals were mainly low and below the maximum permissible limit of the food regulations of Turkey and of international standards. Therefore, no public health problem would be raised in the consumption of these fishes.Öğe Distribution and population dynamics of Aurelia aurita (Cnidaria; Scyphozoa) in the southern Black Sea(North-Western Journal of Zoology, 2009) Bat, Levent; Satılmış, Hasan Hüseyin; Birinci-Özdemir, Zekiye; Şahin, Fatih; Üstün, FundaThe distribution, abundance, biomass and population dynamics of the jelly fish, Aurelia aurita were determined during 2001-2003 in the southern Black Sea (Sinop Region). Aurelia aurita was collected by hand net from inshore and with vertical and with horizontal net hauls from offshore. Volume (wet weight) to length (disc diameter) relation was calculated to be WW= 0.1988 L 2.4406 (R= 0.9525, N= 1162) during October 2001-December 2003 in handling samples; WW= 0.2773 L 2.1282 (R= 0.9351, N= 351) during May 2002-December 2003 in vertical and horizontal net ha uls, respectively. In March 200 3, maximal abundance and biomass of Aurelia aurita were 20 ind.m -2 and 2130 ml.m -2 at station A, respectively. In horizontal tows, maximum abundance and biomass was found in November 2003 (10.63 ind.100m -3 ) at station A and in April 2003 (291 ml.100m -3 ) at station C. Abundance and biomass of A. aurita was detected to increase in autumn and from early to late spring. The highest biomass of A. aurita was observed in March, July and December of 2002 and March and April of 2003. Biomass and abundance was not found to be significantly different between stations A, B and C at Sinop region in the southern Black Sea (p>0.05). Difference of the size and weight relationships was not found among different mont hs in 2002 and 2003 in shallow and hauls sampling (p>0.05). In survey, the difference in diameter groups was found significant (p<0.05) among months of 2002 and 2003.Öğe Distribution of Zn, Cu, Pb and Cd in the Tissues and Organs of Psetta Maxima from Sinop Coasts of the Black Sea, Turkey(Marine Science, 2012) Bat, Levent; Şahin, Fatih; Üstün, Funda; Sezgin, MuratIn the present study, turbot Psetta maxima were selected and analyzed for the Zn, Cu, Pb and Cd concentrations in the muscles, livers and gonads. The results revealed that Zn concentrations were the highest followed by Cu; Pb and Cd being the lowest in the tissues (muscle) and organs (gonads and liver). The liver metal concentrations showed the highest values, whereas the muscle concentrations were the lowest. A comparison between the concentration of each metal found in males and females found significant differences between the sexes for all metals. The liver concentrations of Zn, Cu, Pb and Cd were in the range of 46.89-57.21, 15.96-29.51, 1.75-4.09 and 0.19-0.44 mg/kg wet weight, respectively. The gonad concentrations of Zn, Cu, Pb and Cd were in the range of 37.81-44.11, 6.66-11.32, 0.21-0.34 and 0.14-0.27 mg/kg wet weight, respectively. The muscle concentrations of Zn, Cu, Pb and Cd ranged 18.56-35.33, 1.81-6.11, 0.07-0.21 and 0.016-0.046 mg/kg wet weight, respectively. The values obtained were compared the Turkish Food Codex and Commission Regulation (EC) maximum permitted levels in food. The present study demonstrated that estimated daily and weekly intakes of selected metals via consumption of fish were below the Permissible Tolerable Daily Intake (PTDI) and Provisional Tolerable Weekly Intake (PTWI) values established by FAO/WHO.Öğe Establishing Boundary Classes for the Quality Classification of Southeastern Black Sea Using Phytoplankton Biomass(2015) Ediger, Dilek; Beken, Çolpan Polat; Feyzioğlu, A.Muzaffer; Şahin, Fatih; Tan, İbrahimBentik makro omurgasızlar, makroalg ve fitoplanktonlar Su Çerçeve Direktifinde (SÇD, 2000/60 / EC) önerilen Biyolojik Kalite Elemanları (BQE) olup, su kütlesinin ekolojik statü sınıflandırılmasında kullanılmaktadırlar. Klorofil-a fitoplankton biyokütle göstergesidir, ve bu gösterge evrensel olarak kıyı ekosistemleri için etkili ve uygun bir Biyolojik Kalite Elamanıdır. Bu çalışmada, Güney Doğu Karadeniz için SÇD'nin tanımlamalarına göre klorofil-a sınıf sınır değerleri hesaplanmıştır. Su kalitesi sınıf sınır değerleri " yüksek kalite, iyi, orta, zayıf ve kötü" gibi beş farklı kategoride belirlenmiştir. Güney Doğu Karadeniz kıyı suları derinlik, tuzluluk ve sediman karakteristiğine göre 8 farklı tipolojide (K1-K8) sınıflandırılmıiştır. Bu çalışmada, K1 ve K2 (17,5 tuzluluk, 30m derinlik), tip su kütlesi için var olan zaman serisi verileri kullanılmıştır. Sinop ve Sürmene önlerinde sırasıyla 2002-2010 ve 2001-2011 yılları arasında gerçekleştirilen zaman serisi çalışmalarının yüzey klorofil-a verileri kullanılarak ekolojik kalite durumu belirlenmiştir. Uzun dönemli zaman serisi çalışmalarında klorofil-a nın referans ve sınıf sınır değerleri yüzdebirlik (90th percentale) metodu kullanılarak tanımlanmıştır. Fitoplankton biyokütlesinin mevsimsel farklılıklar göstermesinden dolayı sınıflandırma yıllık olarak yapılmasının yanı sıra mevsimsel olarakda geliştirilmiştir. Yüksek / İyi (H/G) ve İyi / Orta (G/M) su kalitesi sınıfı sınır değerleri Sürmene ve Sinop bölgeleri için uzun dönemli veri setlerinden mevsimlik olarak belirlenmiştir. Bütün sınıf sınır değerleri Sinop bölgesinde daha yüksek olarak gözlenmiştir. Ekolojik Kalite Oranları (EQR) 0-1 aralığında değişim göstermiştir. Sınıf sınır değerlerinin 30m ve 17,5 tuzluluğa sahip kıyı bölgelerinde daha yüksek olarak gözleneceği aşikardır. Ancak elimizde bu su kütleleri için veri seti mevcut değildir. Ekolojik kalite sınıflandırılması için sadece klorofil-a nın kullanılması çok geçerli gibi görülmesede yapılan ekolojik kalite sınıflandırmasının güney doğu Karadenizin 30m den derin suları için zamansal ve mekansal açıdan güvenilir bir yaklaşım olduğu değerlendirilmiştirÖğe Evaluation of the Black Sea Land Based Sources of Pollution the Coastal Region of Turkey(The Open Marine Biology Journal, 2009) Bat, Levent; Gökkurt, Oylum; Sezgin, Murat; Üstün, Funda; Şahin, FatihThe Black Sea receives large quantities of unregulated and uncontrolled fresh water with drawl for irrigation purposes, hydro and thermal power generation and the use of coastal areas for permanent human settlements; shipping; and untreated domestic, industrial and agricultural wastes drain into the sea via the rivers or directly. In spite of this, research on the heavy metal pollution in marine biota of the Black Sea is limited. This review prepared to be informed of the urban sewage pollution loads and heavy metal concentrations of Turkish coasts of Black Sea. The urban sewages and heavy metals currently effective in Turkey coasts of the Black Sea so as to bring up the levels of land based sources of pollution with rivers and streams in the sea. The Black Sea has a special importance because of its being a sea that receives two large rivers, Kizilirmak and Yesilirmak and in this investigation we can show that Yesilirmak has higher amount of discharge then other rivers. This investigation was carried out with indicate to determine the aid of land-based sources and marine activities to the Black Sea, bringing up its present state. Total chrome and cadmium concentrations are higher then other heavy metals streams and rivers because of high amount of industrial discharges. The data presented in investigation on the heavy metal contamination of marine organisms were different depending on pollution sources, element and species. According to the evaluation of inventories, the results are rising year by year.Öğe Fishery of Sinop Coasts in the Black Sea Surveys(2018) Bat, Levent; Şahin, Fatih; Sezgin, Murat; Gönener, Sedat; Erdem, Ercan; Ozsandikci, UgurABSTRACTObjective: The current work was carried out between 2013-2014 during the fishing periods to evaluate certain fish aggloremations within 3 miles of the coastal zone. Therefore, some basic characteristics of fish populations along the Inceburun coast of the Sinop province of the Black Sea were examined.Materials and Methods: Data was collected from 5 trawl operations in the Sinop-Inceburun Region of the Black Sea at depths of 20 to 39 meters at 5 different locations. Biometric measurements of each species was made. A literature searchwas performed to gather information about the status of threatened fish species found in the region. The length-weight parameters of 4 commercial fish species were estimated.Results: During the fishing season between 1st September 2013 and 15th April 2014 different fish species were captured depending on the season and climate. In these surveys, 16 teleost species from 15 families, 2 elasmobranch species from2 families and 2 species of invertebrates were recorded from 5 different stations. In these surveys random samples of red mullet, bluefish, horse mackerel, turbot etc. were collected from 5 different stations. The total mean CPUA was estimated at425.30 kg/km2.Conclusion: The Black Sea areas including those around the Sinop coast have an important effect on the entire production of sea fish of the Turkish fishery. In addition, Sinop fisheries generate significant fishery production supporting logistics and employment. In the Sinop peninsula, there is an increasing trend towards the production of commercial species of the Black Sea.Öğe Heavy Metal Concentrations in Ten Species of Fishes Caught in Sinop(2012) Bat, Levent; Sezgin, Murat; Üstün, Funda; Şahin, FatihMevcut bu çalışmada 2010 yılı avcılık sezonunda Karadeniz'in Sinop kıyılarından örneklenen on balık türünün (Trachurus mediterraneus, Sprattus sprattus sprattus, Mullus surmelatus, Sarda sarda, Mugil cephalus, Scorpaena porcus, Sparus aurata, Umbrina cirrosa, Spicara maena ve Solea solea) sırt kas dokularındaki ağır metal (çinko, bakır, kurşun ve kadmiyum) konsantrasyonları belirlenmiştir. Metal konsantrasyonlarında türler arası önemli farklılıklar bulunmuştur (P0,05). Genel olarak çalışılan ağır metal düzeyleri Tarım, Balıkçılık ve Gıda Bakanlığı (MAFF), Türk Gıda Kodeksi Tebliği, Avrupa Birliği Komisyon Tüzüğünce belirlenen gıda maddelerindeki bulaşanların maksimum limitlerinden daha düşük bulunmuştur. Kadmiyum tüm balık örneklerinde en düşük değerde bulunurken bunu kurşun izlemiştir. Çalışma sonuçları diğer çalışmalarla karşılaştırılarak tartışılmıştır.Öğe Heavy Metal Concentrations in Ten Species of Fishes Caught in Sinop Coastal Waters of the Black Sea, Turkey(Turkish Journal of Fisheries and Aquatic Sciences, 2012) Bat, Levent; Sezgin, Murat; Üstün, Funda; Şahin, FatihIn the present study , the heavy metal concentrations (zinc, copper, cadmium and lead) have been measured in dorsal muscle tissue of ten species ( Trachurus mediterraneus , Sprattus sprattus sprattus , Mullus surmelatus , Sarda sarda , Mugil cephalus , Scorpaena porcus , Sparus aurat a , Umbrina cirrosa , Spicara maena and Solea solea ) from Sinop coast of the Black Sea, Turkey during fish season in 2010 . Significant differences in metal concentrations were found between the species (P<0.05). In general, it was found that the levels of he avy metals studied were lower than the maximum permissible limit of the food regulations of the Ministry of Agriculture, Fisheries and Food (MAFF), the Turkish Food Codex and Commission Regulation (EC). Cd showed the lowest concentrations in all fish sampl es followed by Pb. The results of the present study were compared with the other studies and discussed.Öğe HEAVY METALS IN EDIBLE TISSUES OF BENTHIC ORGANISMS FROM SAMSUN COASTS, SOUTH BLACK SEA, TURKEY AND THEIR POTENTIAL RISK TO HUMAN HEALTH(2016) Bat, Levent; Arıcı, Elif; Sezgin, Murat; Şahin, FatihThe present study was aim to determine the concentrations of copper, cobalt, lead, zinc, cadmium, manganese, nickel and iron in the edible tissues of Liocarcinus depurator (decapoda), Rapana venosa (gastropoda) and Mytilus galloprovincilais (mollusca) collected from Samsun coasts of the Black Sea, Turkey in 2010. These biomonitor species are major food sources of benthic ecosystem. Exposing to heavy metals at higher concentrations might be toxic to demersal fish species and also humans. The concentrations of the metals were carried out using Flame (UNICAM 929). Metal concentrations in L. depurator, R. venosa and M. galloprovincilais decrease in the order: Fe > Zn > Mn > Cu > Ni > Pb > Co > Cd; Fe > Zn > Cu > Pb > Mn > Cd > Ni and Fe > Zn > Cu > Pb > Mn > Co > Ni > Cd, respectively. The results showed that the Fe and Zn concentrations were the highest in edible tissues of the three benthic organisms, respectively. Mn was higher in the edible tissues of L. depurator than those in other species, while R. venosa and M. galloprovincilais shows more of Cu and Pb levels. The estimates of EWI and EDI indicated no health risk as values are lower than the allowed tolerable levels cited by internationals committees. Based on the above results of this study, metal accumulation in the biomonitor demersal species study did not exceed the permissible limits set for heavy metals by FAO/WHO.Öğe Karadeniz hamsi balıkçılığı stok dağılımı. besin kondisyonu ve çevresel etkilere tepkisi(2012) Kaya, Yalçın; Yardım, Öztekin; Sezgin, Murat; Seyhan, Kadır; Şahin, Fatih; Bat, Levent[No abstract available]Öğe Karadeniz'in Sinop bölgesinin alt besin tabakalarının dinamik ve zaman serileri(2005) Bırcan, Recep; Bat, Levent; Kıdeys, Ahmet Erkan; Satılmış, Hasan Hüseyin; Üstün, Funda; Şahin, Fatih; Birinci Özdemir, ZekiyeSon çeyrek yüzyılda, özellikle Kuzeybatısındaki büyük nehirlerin taşıdığı besin tuzları (nitrat ve fosfat) konsantrasyonunun artması sonucu, Karadeniz ekosistemi çok köklü değişimlere uğramıştır. Besin tuzu dengesinin bozulması sonucu meydana gelen anormal değişimler, önce fıtoplankton ve daha sonra da zooplanktonun kalite ve miktarında yansıtılmıştır. Bu çalışmada, Orta Karadeniz'in Sinop Burnu açıklarındaki kuzey-güney yönünde uzanan bir hat boyunca belirlenen 2 istasyonda su kütlesinde O2, pH, sıcaklık, tuzluluk, fosfat, nitrat, silikat, klorofil- $\\alpha$ ölçümleri ile fıtoplankton, zooplankton, ihtiyoplankton ve makrozooplankton örneklemeleri yapılarak elde edilecek bir zaman serisi yardımıyla yörenin biyokimyasal yapısının sene boyunca değişimi incelenmiştir.Öğe Kırım (Ukrayna) ve Sinop (Türkiye) kıyıları meiobentik kommunite yapılarının Türkiye'nin Karadeniz kıyıları deniz koruma alanlarının (DKA) belirlenmesi kapsamında karşılaştırmalı araştırılması(2011) Sezgin, Murat; Dağlı, Ertan; Eyüboğlu, Bora; Şahin, Fatih; Bakır, Kerem; Ürkmez, Derya; Çulha, Mehmet[No abstract available]Öğe Orta Karadeniz’in Sinop Bölgesinde Jelimsi Organizmalar ile Balık Yumurta ve Larvalarının 2002 Yılı Kompozisyonu(Ege Üniversitesi Su Ürünleri Dergisi, 2006) Satılmış, Hasan Hüseyin; Bat, Levent; Özdemir, Zekiye Birinci; Üstün, Funda; Şahin, Fatih; Kıdeys, Ahmet Erkan; Erdem, YakupBu araştırmada 2002 yılında Orta Karadeniz’in Sinop Bölgesi’ndeki makrojelimsi organizma (Aurelia aurita, Pleurobranchia pileus, Mnemiopsis leidyi ve Beroe ovata) türleri ile balık yumurta ve larvalarının bolluğu ve dağılımının tespit edilmesi amaçlanmıştır. Bunun için bölgede seçilen 3 istasyonda, dikey ve yatay olarak plankton çekimleri yapılmıştır. Araştırmada ktenoforlardan Mnemiopsis leidyi Ocak-Eylül, Beroe ovata Ağustos-Aralık periyotlarında görülebilmiştir. Aurelia aurita ve Pleurobranchia pileus türleri ise 2002 yılında geniş dağılım göstermişlerdir. İhtiyoplankton örneklerinden toplam 857 adet yumurta ve 150 adet larva toplanmış olup 8 familyaya ait 8 tür tayin edilmiştir. Toplam yumurtanın %77.7’sini Sprattus sprattus phalericus, %10’unu Engraulis encrasicolus ponticus ve %10’unu da Mullus barbatus türüne ait yumurtalar oluşturmuştur. Toplam larvanın %51’ini S. s. phalericus, %15’ini Blennidae familyası ve %13’ünü de E. e. Ponticus türleri oluşturmuştur. İhtiyoplankton tür sayısı ve bolluğu 1999-2000 yılından daha düşük bulunmuştur. Sıcaklık değerlerinin yükseldiği dönemlerde jelimsi organizma ile balık yumurta ve larva miktarlarının arttığı belirlenmiştir. Kısa süreli örneklemelerde (bir yıl boyunca) jelimsi organizmalarla balık yumurta ve larvaları arasındaki net bir ilişki bulunamamıştır (p>0.05).Öğe Phytoplankton Species Composition in the Turkish Coast of the Aegean Sea between 2014 and 2016(2024) Şahin, FatihThe research was carried out between 2014 and 2016, within the scope of the ‘National Integrated Marine Pollution Monitoring Program,’ in a total of five seasonal cruises at 22 stations along the Turkish coast of the Aegean Sea. A total of 296 phytoplankton species and one subspecies belonging to 12 classes were identified from samples collected during the five seasonal cruises. The highest diversity was observed in the summer of 2015, with 204 species recorded, while the lowest was 137 species in the summer of 2016. Dinoflagellates dominated the species composition, accounting for 51% of the species, followed by diatoms (44%), and other groups (5%). At the genus level, Chaetoceros, Thalassiosira, Bacteriastrum, and Coscinodiscus were the most dominant diatom genus, whereas Protoperidinium, Tripos, Dinophysis, Oxytoxum, and Prorocentrum were dominant among dinoflagellates. Amphisolenia schauinslandii Lemmermann 1899 and Ceratoperidinium margalefii A.R. Loeblich III 1980 were recorded for the first time along the Turkish coast of the Aegean Sea. This study provides a comprehensive assessment of the phytoplankton taxonomic diversity in the region from to 2014-2016.Öğe Risk assessment of elements in muscle of two biomonitored fish species from the southern Black Sea(Elsevier, 2023) Bat, Levent; Öztekin, Ayşah; Öztürk, Dilara Kaya; Arıcı, Elif; Şahin, Fatih; Hasançavuşoğlu, ZeynepTrace elements (Cd, Hg, Pb, Cu, Zn, and Fe) concentrations in the muscle of Mullus barbatus (red mullet) and Merlangius merlangus (whiting) were measured by inductively coupled plasma mass spectrometry from the southern Black Sea. Fe showed the highest amount in edible tissues of both fish species followed by Zn and Cu. The lowest element measured was Cd, followed by Hg and Pb. Element amounts in edible tissues were compared with national and international permissible limits and were within the permissible safety levels for human consumption. The risk assessment, related to the consumption of red mullet and whiting, was implemented, considering the concentrations of six metals, the estimated weekly intake (EWI), the provisional tolerable weekly intake (PTWI), the target hazard quotient (THQ), hazard index (HI), and risk index (RI). The HI values for both red mullet and whiting were found to be less than one, indicating that eating these fish poses no health risk. Moreover, RI due to Pb exposure through fish consumption may also have no chance of contracting cancer in the future. © 2024 Elsevier Ltd. All rights reserved, including those for text and data mining, AI training, and similar technologies.Öğe Sinop City Fishery of the Black Sea(Marine Science, 2013) Bat, Levent; Sezgin, Murat; Şahin, Fatih; Özdemir, Zekiye Birinci; Ürkmez, DeryaThe Black Sea has historically been one of the most biologically productive regions in the world. Although it has 168 fish species, there are only a few species of commercial importance and the supply of fishes is limited, because intensive fishing, industrialisation and urbanisation have caused the most favoured species to decline. This review prepared to give information on Sinop fisheries of Turkish coasts of the Black Sea.
