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Öğe A parasitological study of fish from the Atatürk Dam lake, Turkey(2009) Öktener, Ahmet; Alaş, AliIn the present study Mastacembelus mastacembelus, Silurus triostegus, Carasobarbus luteus and Cyprinus carpió caught in the Atatürk Dam Lake were examined for parasites over the period of July to August 2006. This paper presents the first records for the occurrence of Mastacembelocleidus heteranchorus, Senga mastacembeli and Postgangesia inarmata from Turkey.Öğe A study on the morphology of Argulus foliaceus Lin., 1758 (Crustacea; Branchiura) procured from Çavuşcu Lake (Central Anatolia-Turkey) with scanning electron microscopy(2010) Alaş, Ali; Öktener, Ahmet; Solak, KemalBu çalışmada, Çavuşçu Gölü (Konya; 36°41´N, 34°26´E)’nden yakalanan 24 Cyprinus carpio Lin.,1758’nun Metazoon parazitleri incelenmiştir. İncelenen balıklarda Argulus foliaceus Lin.,1758’un enfestasyon oranının % 45,8 olduğu belirlenmiştir. Ayrıca, Argulus foliaceus scanning electron microskobu (SEM) ve ışık mikroskobu ile fotoğraflanmıştır.Öğe An electrophoretic taxonomic study on serum proteins of Acanthobrama marmid, Leuciscus cephalus, and Chondrostoma regium(EurAsian Journal of BioSciences, 2007) Yılmaz, Muhittin; Yılmaz, H. Ramazan; Alaş, AliIn this study, native polyacrylamide gel electrophoresis (Native-PAGE) and sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) were applied to the serum proteins of Leuciscus cephalus, Acanthobrama marmid and Chondrostoma regium (Cyprinidae) fish taken from) the Karakaya Dam (Malatya, Turkey). The electrophoregrams showed that there were similarities and differences in the molecular weight (MW) of the serum proteins among the three species. In the Native-PAGE, the total number of serum protein bands of L. cephalus, A. marmid and C. regium were 5, 8, 7, respectively. In the SDS-PAGE, 13 protein bands were obtained in L. cephalus, 11 in A. marmid and 11 in C. regium. In the electrophoregrams obtained from native-PAGE, the MW of the protein bands were found to be different in the fish species except the 80.3 kD protein band which was detected in the three fish species. In the SDS-PAGE, the protein band of 21.7 kD was observed in the three fish species. Protein bands of 63.4, 52.3 and 49.5 kD were present only in L. cephalus and C. regium. On the other hand, it was seen that other protein bands had similar molecular weights.Öğe Cases of external myiasis caused by diptera (Sarcophaga sp.) on three cyprinid species(Taylor & Francis, 2009) Öktener, Ahmet; Alaş, AliSarcophaga sp. caused external myiases on three cyprinid species caught from Ataturk Dam Lake, Turkey) in July 2006. A total of 130 live dipteran larvae were collected from the body surfaces of Cyprinus carpio L., 1758, Barbus grypus Heckel, 1843, and Capoeta trutta Heckel, 1843. There was 100% infestation of all three species of fish, with a mean intensity of 13.6 for C. carpio, 5.6 for B. grypus, and 4.3 for C. trutta. The myiases were probably accidental infections on stressed and immobilized fishes.Öğe Clavellotis strumosa (Brian, 1906) (Copepoda, Lernaeopodidae), a gill parasite of Pagellus erythrinus Linnaeus, 1758) (Pisces, Sparidae) from the Sea of Marmara(Brill Academic Publishers, 2008) Öktener, Ahmet; Alaş, Ali; Solak, Kemal[Abstract Not Available]Öğe Cymothoid (Crustacea, Isopoda) records on marine fishes (Teleostei and Chondrichthyes) from Turkey(2009) Öktener, Ahmet; Trillès, Jean Paul; Alaş, Ali; Solak, Kemal CemNine teleostean and one chondrichthyan species are identified as new hosts for six cymothoid isopods, Nerocila bivittata (Risso, 1816), Ceratothoa steindachneri Koelbel, 1878, Ceratothoa oestroides (Risso, 1826), Livoneca sinuata Koelbel, 1878, Anilocra physodes L., 1758 and Mothocya taurica (Czerniavsky, 1868). Six of these hosts are reported for the first time. They are: Helicolenus dactylopterus dactylopterus, Argentina sphyraena, Belone belone, Chromis chromis, Conger conger, Trisopterus minutus. Others are new hosts in Turkey.Öğe Effect of urea concentration on microbial Ca precipitation(Elsevıer Science Inc, 2012) Işık, Mustafa; Altaş, Levent; Özcan, Samet; Şimşek, İsmail; Ağdağ, Osman Nuri; Alaş, AliHigh calcium concentrations are problematic, because they lead to clogging of pipelines, boilers and heat exchangers through scaling, or malfunctioning of aerobic and anaerobic reactors. Urea hydrolysis provides simultaneously a pH and CO2 increase, both of which are responsible of CaCO3 production. This study was carried out to determine urea concentrations between 5 and 20 mM on ureolytic mixed culture treating synthetic wastewater. The optimum urea concentration was found as 15 mM for effective calcium removal. This work showed the feasibility of urea-based microbial carbonate precipitation as an alternative Ca2+ removal technology. (C) 2012 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.Öğe Feeding habits of Tench (Tinca tinca L., 1758) in Beyşehir Lake (Turkey)(Turkish Journal of Fisheries and Aquatic Sciences, 2010) Alaş, Ali; Altındağ, Ahmet; Yılmaz, Muhittin; Kırpık, M. Ali; Ak, AkifIn this study, alimentary canal contents of 188 tench (Tinca tinca L., 1758) caught from Beyşehir Lake (Turkey) between April 2004 and March 2005 were examined for feeding habits. Phytoplanktonic and zoooplanktonic organisms, insects, detritus (animal and vegetable) and two most common parasites of tench, Ligula intestinalis and Asymphylodora tincae were determined in observed in the alimentary canal of fish. There was a significant difference between the frequency of the existance of Chlorella, Coscinidiscus, Fragilaria, Mougetia, Phytoconis, Pinnularia, Rivularia, Synedra, Ulotrix, Brachionus, Gammarus sp., and Ligula intestinalis among seasons (df=3, P<0.05). Only 6 of these genera (Chaetophora, Coscinidiscus, Phytoconis, Surirella, Synedra, Daphnia) had a significant difference among age classes (df=5, P<0.05). Additionally, it was found that only 5 of the 188 tench (2.66%) were observed to have almost empty alimentary canal. Algae and macrophytes were found to be the most considerable food types in the present study, which is followed by zooplankton and insect larvae. Konu Alanı:Öğe Fish-borne parasitic zoonoses in Turkish waters(2010) Öktener, Ahmet; Yurdakul, Necati; Alaş, Ali; Solak, KemalThe purpose of this study, to give information about zoonosis in freshwater and marine fishes. Three digeneans (Heterophyes heterophyes, Opisthorchis felinus, Centrocestus formosanus), one nematod (Anisakis simplex) and one cestod species (Diphyllobothrium sp.) which have zoonosis character were recorded from 15 host fishes. Anisakis was reported from marine fishes which is heavily consumed by people. Limited number of parasite having zoonosis character have been determined in marine and fresh water fishes in Turkey since 1931. For this reason, advanced studies are necessary about this subject.Öğe Gnathia sp. (Gnathiidae) ınfestations on marine fish species from Turkey(Kafkas Üniversitesi, 2009) Alaş, Ali; Öktener, Ahmet; Yılmaz, MuhittinBu çalışma Haziran-Ağustos 2006 periyodunda yapılmıştır. Marmara Denizi, Karadeniz ve Ege Denizi’nden yakalanan 10 farklı balık türünden toplam 150 balık incelenmiştir. Bu amaçla her bir balığın vücut yüzeyi, yüzgeçleri, solungaçları ve ağız boşluğu disseksiyon mikroskobu ile incelenmiştir. Bundan sonra ektoparazit örnekleri disseksiyon mikroskobu altında incelenmiş olup, toplanan balıkların teşhis edileceği zamana kadar %70’lik etanolde muhafaza edilmiştir. Gnathia sp. larvalarına enfekte balıkların solungaç flamentleri ve ağız boşluklarında rastlanmıştır. Bu çalışmayla Türkiye’de Serranus cabrilla; Mullus surmuletus; Mugil cephalus; Trachurus mediterraneus; Sarpa salpa; Sciaena umbra balık türlerinden Gnathia sp. ilk defa rapor edilmektedir.Öğe New host record, Chalcalburnus mossulensis (Heckel, 1843) (Teleostei; Cyprinidae) for Ergasilus mosulensis Rahemo, 1982 (Copepoda; Ergasilidae)(2008) Öktener, Ahmet; Ali, Atheer Hussain; Alaş, AliWe report the presence of the parasitic copepod Ergasilus mosulensis Rahemo, 1982 (Copepoda, Ergasilidae) on the Caspian sheaya, Chalcalburnus mossulensis (Heckel, 1843) (Teleostei, Cyprinidae), caught from Atatürk Dam Lake (36° 41' N 37° 49' E, Sanliurfa, Turkey) between July and August 2006. A total of 23 Ergasilus mosulensis Rahemo, 1982 (Ergasilidae) were recorded from the gills of this fish species for the first time. Percentage of prevalence and mean intensity of infection was 10.8 and 1.8, respectively. The morphological characteristics of Ergasilus mosulensis were studied by means of scanning electron microscopy.Öğe New host record, Parablennius sanguinolentus (Teleostei, Perciformes, Blenniidae) for Nerocila bivittata (Crustacea, Isopoda, Cymothoidae)(Springer, 2008) Alaş, Ali; Öktener, Ahmet; İşçimen, Ali; Trilles, Jean PaulNerocila bivittata (Crustacea, Isopoda, Cymothoidae) is reported for the first time on the caudal peduncle of the Rusty blenny, Parablennius sanguinolentus (Teleostei, Perciformes, Blenniidae), collected from Samsun Coast, Black Sea, Turkey. N. bivittata parasitized 7.4% (2 of 27) of the P. sanguinolentus collected.Öğe Occurence of Diplectanum aequans (Wagener,1857) on the cultured sea bass, Dicentrarchus labrax (Linnaeus, 1758) from the Black Sea of Turkey(2009) Öktener, Ahmet; Alaş, Ali; Solak, Kemal CemThis report of Diplectanum aequans (Wagener,1857) (Platyhelminthes, Diplectanidae) was presented for the first time from the gills of Dicentrarchus labrax (Linnaeus, 1758) (Perciformes, Moronidae) cultured in the Black Sea of Turkey (Vona Koyu, Ordu, 41° 05' 02'' N; 37 ° 47' 04'' E). Diplectanum aequans was recorded with a prevalence of 100 % and 3.45 the mean intensity on host.Öğe Öğretmen adaylarının bilinçli su tüketimi davranışları üzerine bir araştırma: Atatürk üniversitesi örneği(Erzincan Üniversitesi, 2009) Alaş, Ali; Tunç, Tuncay; Kışoğlu, Mustafa; Gürbüz, HasanÖğrencilerde çevreye duyarlı davranışların oluşturulmasında formal eğitimin en önemli öğeleri olan öğretmenlerin rolü oldukça fazladır. Bu noktada öğrencilerin model olarak aldıkları öğretmenlerin su tüketimi davranışları oldukça önemlidir. Bu nedenle öğretmen yetiştiren kurumlarda, öğretmen adaylarına bilinçli su tüketimi davranışlarının kazandırılması gerekmektedir. Yapılan bu çalışma ile öğretmen adaylarının su tüketimi davranışlarının belirlenmesi ve hatalı olanların düzeltilmesi noktasında bazı öneriler getirilmesi amaçlanmıştır. 2007-2008 öğretim yılı bahar döneminde yapılan araştırmanın örneklemini Atatürk Üniversitesi Kazım Karabekir Eğitim Fakültesi Ortaöğretim Bölümü biyoloji, fizik ve kimya öğretmenliği son sınıfında okuyan 139 öğretmen adayı oluşturmaktadır. Öğretmen adaylarının su tüketimi davranışlarının belirlenmesinde araştırmacılar tarafından geliştirilen ve üçlü likert tipte hazırlanan 13 maddelik “Bilinçli Su Tüketimi Anketi” kullanılmıştır. Çalışma sonucunda öğretmen adaylarının su tasarrufuna fazla dikkat etmedikleri sonucuna varılmıştır. Bununla birlikte adayların su tüketimi davranışlarının cinsiyetlerine, yaşlarına, öğrenim gördükleri bölümlere ve yaşadıkları yerleşim birimlerine göre farklılaşmadığı belirlenmiştir.Öğe Reproductive biology of Capoeta Tinca inhabiting Kayabogazi dam lake (North-West Anatolia, Turkey)(Kafkas Üniversitesi, 2010) Alaş, AliThis study investigates the reproduction biology of Capoeta tinca population in Kayabogazi Dam Lake in the region of Northwest Anatolia in Turkey (Kutahya). The investigation was carried out between March and December 2003. During the study, breeding and sexual maturation properties of Capoeta tinca were studied. The sexual maturity position for both sexes were II age. The spawning period was from begining of May to the end of June. The minimum fishing size was found as 214 mm in terms of fork length. According to age, the reproduction period was changing between different populations depending on ecological conditions in Turkey's areas.Öğe The effect of PowerPoint presentations prepared and presented by prospective teachers on biology achievement and attitudes toward biology(Elsevier Science Bv, 2010) Gürbüz, Hasan; Kışoğlu, Mustafa; Erkol, Mehmet; Alaş, Ali; Kahraman, Sakıp; Uzunboylu, HThe study aims to explore the effect of preparing and presenting powerpoint slides on prospective teachers' biology achievement and attitudes toward biology. The sample of the study was 109 freshman students from Pre-School Education Department at Ataturk University in Turkey. The sample was randomly assigned as control group consisted of 53 students and experimental group consisted of 56 students. The experimental group was taught by powerpoint presentations preparing and presenting by prospective teachers while the lesson was conducted through traditional approach in the control group. Results indicated that preparing and presenting powerpoint slides had a significant effect on prospective teachers biology achievement and attitudes towards biology. (c) 2010 Elsevier Ltd. All rights reserved.Öğe The reproductive biology of the tench (Tinca tinca L., 1758) in Kayabogazi (Kütahya, Turkey) Dam Lake(2004) Alaş, Ali; Solak, Kemal CemThis study was carried out between January 1996 and December 1997 in Kayabogazi Dam Lake. During this period 424 specimens were examined. The age of females and males ranged from I to VII. The fork length and weight of females and males were 102-277 mm and 15-377.02 g and 125-274 mm and 27-369.02 g, respectively. There was no statistically significant difference between females and males in terms of body length and weight. The sex ratio (male:female) was 0.947:1. Gonadosomatic index values varied from 1.40 to 10.19. The sexual maturity age for males and females was III and IV, respectively. The spawning period was from the beginning of June to the end of July. The average number of eggs was estimated to be 42,724 ± 5658.93 for each individual. In addition, the regression equations were Log F = -2.18301 + 2.923 log L (r = 0.96) for fecundity and body length (L) and Log F = 2.889918 + 0.792 log W (r = 0.97) for body weight (W).Öğe Turkish prospective teachers' understanding and misunderstanding on global warming(2011) Öcal, Adem; Kışoğlu, Mustafa; Alaş, Ali; Gürbüz, HasanThe key objective of this study is to determine the Turkish elementary prospective teachers' opinions on global warming. It is also aimed to establish prospective teachers' views about the environmental education in Turkish universities. A true-false type scale was administered to 564 prospective teachers from science education, social studies education and primary school education departments of three universities in Turkey. The findings revealed that prospective teachers had some misunderstandings about global warming. It was also found that they accessed information on global warming through informal sources such as TV, radio and Internet. In addition, there were significant differences in participants' total scores in terms of gender and department. According to the findings, prospective teachers thought that environmental education given at universities was not adequate for various reasons.Öğe Zoobenthic fauna and seasonal changes of mamasin dam lake (Central part of Turkey)(Academic Journals, 2009) Ersan, Ebru; Altındağ, Ahmet; Ahıska, Seyhan; Alaş, AliThis study was conducted at Mamasin dam lake of Aksaray between April 2002 and March 2003. Seasonal changes in the zoobenthic fauna as well as some physical and chemical parameters of lake were examined based on water samples collected from 4 stations selected in the lake. It was determined that zoobenthic organisms are composed of 86.23% chironomidae, 7.3% oligochaeta and 6.47% mollusca. Four species of chironomidae, 8 of oligochaeta and 5 of mollusca were detected. In respect to faunastic biomass, it was observed that zoobenthic organisms in the lake were maximum in autumn and minimum in spring. Some water quality parameters of 4 stations selected in the lake were measured. The evaluation of the data obtained from the stations and the previous studies revealed that the water quality of Mamasin dam lake is decaying as the pollution builds up and drawing near to the eutrophic level as the indicator species surfaced point out.
