Yazar "Çulha, Mehmet" seçeneğine göre listele

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    Acute toxicity of zinc, copper and lead to three species of marine organisms from Sinop Peninsula, Black Sea
    (Turkish Journal of Biology, 1999) Bat, Levent; Gündoğdu, Ayşe; Sezgin, Murat; Çulha, Mehmet; Gönlügür, Gamze; Akbulut, Mehmet
    Acute toxicity tests were performed on Echinogammars olivii (Amphipoda), Sphaeroma serratum (Isopoda) and Palaemon elegans (Decapoda), from the Sinop Peninsula in the Black Sea. 96- h LC 50 values were estimated for copper, zinc and lead in these species using the static bioassay method. The LC 50 values of Cu for E. olivii, S. serratum and P. elegans were 0.25, 1.98 and 2.52 mg/l, respectively. The LC 50 values of Zn for E. olivii , S. serratum and P. elegans were 1.30, 6.12 and 12.3 mg/l, respectively. The LC 50 values of Pb for E. olivii, S. serratum and P. elegans were 0.62, 4.61 and 5.88 mg/l, respectively. The results indicated that Cu was more toxic to the species followed by Pb and Zn. E. olivii was more sensitive to the metals than S. serratum and P. elegans.
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    Benthic mollusc composition of some facies in the upper-infralittoal zone of the southern Black Sea, Turkey
    (Turkish Journal of Zoology, 2010) Çulha, Mehmet; Bat, Levent; Çulha, Saniye Türk; Çelik, Meryem Yeşim
    The aim of the present study was to describe the mollusk syntaxon associated with Cystoseira barbata and Mytilus galloprovincialis facies, which are widely distributed along the coasts of the Sinop Peninsula, Turkey. Four stations were chosen for each facies at depths of 0.5-5 m, and a total of 32 seasonal samplings were performed with 4 replicate groups between February 2006 and November 2006. As a result of the qualitative and quantitative analyses, the C. barbata facies was shown to be represented by 14 species and 5807 specimens, whereas that of M. galloprovincialis was represented by 11 species and 18,407 specimens. Dominant species of the C. barbata facies were Mytilaster lineatus (56%), Tricolia pullus (18%), Rissoa splendida (12%), and Gibbula adansonii (7%). Dominant species of the M. galloprovincialis facies were, however, Mytilaster lineatus (63%) and Mytilus galloprovincialis (36%). Seasonal water parameters were also measured at the stations. Seasonal and spatial variations in the mollusk fauna were observed and showed the highest values in station 3 and during the summer period.
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    Ecology and Distribution of the Veined Rapa Whelk Rapana venosa (Valenciennes, 1846) in Sinop Peninsula (Southern Central Black Sea), Turkey
    (Journal of Animal and Veterinary Advances, 2009) Çulha, Mehmet; Bat, Levent; Doğan, Alper; Dağlı, Ertan
    Rapana venosa (Valenciennes, 1846) is the only Prosobranch gastropod species which is of significant economic value on the coasts of the Black Sea and which is regularly collected in certain periods. This species, known to be of indo-pacific origin, was introduced to the Black Sea in the 1940s and it has spread over the coasts of the Caucasus, the Crimea and the Azov Sea over a period of 10 years. Subsequently, it has expanded its distribution towards the Turkish and Bulgarian coasts of the Black Sea and the coasts of Romania during 1959-1972. Rapana venosa has been reported from South-Eastern coasts of South America and also from the Red Sea and many localities of the Adriatic Sea for 20-25 years. It has been reported to be incidentally introduced into these areas probably by vessels. In this study, the ecology and distribution of Rapana venosa (Valenciennes, 1846), an invader species of the Sinop peninsula is discussed. In this context, the seasons, stations, depths and various biotopes and also the growth parameters (width-length) of the individuals were investigated depending on seasons and stations. As a result of the statistical evaluations, it was found that noticeable differences existed among the parameters examined.
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    Effect of temperature on the toxicity of zinc, copper and lead to the freshwater amphipod Gammarus pulex (L., 1758)
    (Turkish Journal of Zoology, 2000) Bat, Levent; Akbulut, Mehmet; Çulha, Mehmet; Gündoğdu, Ayşe; Satılmış, Hasan Hüseyin
    This study showed the effect of temperature on copper, zinc and lead toxicity to the freshwater amphipod Gammarus pulex pulex . 96-h LC 50 values were estimated for copper, zinc and lead in this species using the static bioassay method. Increase in the concentration of copper, zinc and lead decreased the survival of the animals. The LC 50 values of Cu, Zn and Pb for Gammarus pulex pulex ranged from 0.028 to 0.080, 5.2 to 12.1 and 11.2 to 23.2 mg/l, respectively. The results indicated that Cu was more toxic to the species, followed by Zn and Pb. The results were compared with those from other studies and discussed.
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    Effects of sewage pollution the structure of the community of Ulva lactuca, Enteremorpha linza and rocky macrofauna in Dışliman of Sinop
    (Turkish Journal of Biology, 2001) Bat, Levent; Akbulut, Mehmet; Sezgin, Murat; Çulha, Mehmet
    Untreated sewage and domestic wastes from the Sinop outfall enter the Dışliman region. The effect of this on the distribution of Ulva lactuca, Enteromorpha linza and benthic macrofauna and on enviromental parameters was determined. Increases in the growth of opportunistic green algae such as Ulva lactuca and Enteromorpha linza in response to increased nutrient supply in the Dışliman coastal ecosystems in Sinop are reported in the present study. The results of this study show that organic enrichment also increases, with Mytilus galloprovincialis (Mollusca), Erichthonius brasiliensis, Echinogammarus olivii and Amphitoes ramondi, Idotea baltica and Sphaeroma serratum (Crustacea) being the most abundant species.
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    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]
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    On the Occurence of Niphargus valachicus Dobreanu & Manolache, 1933 (Amphipoda, Gammaridae) in the Western Black Sea Region of Turkey
    (Turkish Journal of Zoology, 2001) Akbulut, Mehmet; Sezgin, Murat; Çulha, Mehmet; Bat, Levent
    In this study, the characteristic features, distribution and ecology of the amphipod Niphargus valachicus E. Dobreanu & C. Manolache, 1933 sampled at Sırakaraağaçlar Stream of Sinop, flowing into the Black Sea, are given. Four taxa of Niphargus genus, freshwater Amphipoda fauna have been identified in Turkey. In addition to these, Niphargus valachicus is a new record for the Turkish freshwater fauna.
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    Orta Karadenez' in Sinop Burnu Bölgesinin biyokimyasal dönüşüm çalışmaları
    (2000) Büyükhatipoğlu, Şevket; Tuğrul, Süleyman; Satılmış, Hasan Hüseyin; Kıdeys, Ahmet Erkan; Akbulut, Mehmet; Çulha, Mehmet; Bat, Levent
    Son 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 fitoplankton 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 yaklaşık 15 gün aralıklarla su kütlesinds $O_2$, pH, sıcaklık, tuzluluk, fosfat, nitrat, silikat, klorofil-a ölçümleri ile fitoplankton ve ihtiyoplankton örneklemeleri yapılarak elde edilecek bir zaman serisi yardımıyla yörenin biyokimyasal yapısının sene boyunca değişimi incelenmiştir.
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    Sarıkum Gölü (Sinop) Makrobentik Mollusca ve Crustacea Faunası
    (Ege University Journal of Fisheries and Aquatic Sciences, 2008) Yardım, Öztekin; Şendoğan, Elif; Bat, Levent; Sezgin, Murat; Çulha, Mehmet
    Sinop ili Sarıkum Gölü makrobentik omurgasız faunasını tespit etmek amacıyla Kasım 2004-Ekim 2005 tarihleri arasında örneklemeler yapılmıştır. Örneklemeler, gölü temsil eden 4 istasyonda aylık olarak gerçekleştirilmiştir. Haziran, Ağustos ve Eylül aylarında kötü hava koşulları nedeniyle örnekleme yapılamamıştır. Araştırma sonucunda, Gastropoda (6 takson), Bivalvia (7 takson) ve Crustacea (13 takson)’ya ait toplam 26 bentik takson saptanmıştır. Araştırma bölgesinin sıcaklık, tuzluluk, pH ve oksidasyon redüksiyon değerleri ölçülerek sediman ve su kalitesi hakkında fikir edinilmiştir. Tespit edilen taksonların çoğunluğunun öriform olduğu gözlenmiştir. Yapılan organik madde ve oksidasyon redüksiyon ölçümleri sonucunda ise 1 nolu istasyonun organik madde bakımından düşük, 4 nolu istasyonun ise organik madde miktarının yüksek olduğu belirlenmiştir.
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    The Macrobenthic Fauna of Sırakaraağaçlar Stream flowing into the Black Sea at Akliman, Sinop
    (Turkish Journal of Marine Sciences, 2000) Bat, Levent; Akbulut, Mehmet; Çulha, Mehmet; Sezgin, Murat
    In the present study carried out between July 1997 and June 1998, samples of macrobenthic fauna were collected at Akliman (Sinop) where Sırakaraağaçlar stream flowed into the Black Sea. The physical parameters of water were measured, Sea, brackish water and fresh water species were determined, 39 in total including Mollusca, Insecta (larvae), Crustaceae, Polychaeta, Hirudinae and Turbellaria, The first. sampling station was chosen at the mouth of the Sırakaraağaçlar stream. The results show that the Mollusc Fauna was predominant in respect to species diversity, while the species belonging to Insects larvae, Crustaceae and Polychaeta Classis were in minority. The second and third stations were chosen at the inner place from the mouth of Sırakaraağaçlar stream near its spring. Insecta larvae was predominant in respect to species diversity, whereas the species belonging to Mollusca fauna, Crustaceae, Polychaeta, Hirudinae and Turbellaria Classis were in minority. Thus, the most predominant species in Sırakarağaçlar Stream were identified as euriform and found in less flowing part of the stream.
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    Toxicity of zinc, copper and lead to Idotea baltica (Crustacea, Isopoda)
    (Turkish Journal of Biology, 1999) Bat, Levent; Sezgin, Murat; Gündoğdu, Ayşe; Çulha, Mehmet
    The acute toxicity of zinc, copper and lead to the marine invertebrate Idotea baltica (Crustacea, Isopoda) was evaluated by static bioassays, calculating the LT 50 (lethality time for 50%) for males and females. Survival time decreased with increasing concentrations of zinc, copper and lead. Zinc was more toxic to Idotea than copper and lead. Lead was the least toxic of the metals tested.