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Öğe Aquatic Oligochaeta (Annelida: Clitellata) Assemblages in the Streams of Biga Peninsula (Marmara-Turkey) and Their Seasonal Variations(Çanakkale Onsekiz Mart Üniversitesi, 2018-12-26) Odabaşı, Serpil; Cirik, Semra; Arslan, Naime: In the present study, aquatic Oligochaeta (Annelida: Clitellata) fauna and environmental parameters from 15 predetermined stations in Sarıçay, Karamenderes, Tuzla, and Kocabaş streams in Biga Peninsula (NorthWest Anatolia) were seasonally studied. Benthic samplings were collected via Hess Sampler and Ekman Birge Grab. During benthic samplings, temperature, electrical conductivity, pH, and dissolved oxygen were analysed on-site whereas chemical oxygen demand (COD), biological oxygen demand (BOD5), and water quality parameters such as PO4-P, and NO3-N were analysed in laboratory. In this study, a total of 340.993 individuals of Oligochaeta belonging 33 different taxawere obtained. The family Naididae had the highest number of species (29 taxa); and followed by Enchytraeidae (2 taxa) and Lumbriculidae (2 taxa).It was demonstrated through Multidimensional Scaling (MDS) that species that are tolerant to organic pollution, including Potamothrix hammoniensis (Michaelsen, 1901), Tubifex tubifex Müller, 1774, Limnodrilus hoffmeisteri Claparede, 1862 are dominant in the stations located in sub tributary basins. In addition, Bothrioneurum vejdovskyanum Stolc, 1886, Mesenchytraeus sanguineus Nielsen & Christensen, 1959 and Enchytraeus christenseni Dozsa-Farkas, 1992, found in this study, are recorded for the first time for the aquatic Oligochaeta Fauna in Turkey.Öğe EFFECT OF SALINITY ON GROWTH CHARACTERISTICS AND PIGMENT COMPOSITION OF TWO STRAINS OF DUNALIELLA VIRIDIS TEODORESCO: LABORATORY AND OUTDOOR STUDIES(Parlar Scientific Publications (P S P), 2012) Ak, Ilknur; Cirik, Semra; Goksan, Tolga; Koru, EdisIn this study, the effect of salt concentration on growth characteristics and pigment accumulation of two strains of Dunaliella viridis Teodoresco (Ayvalik and Dalyan) which were cultured both at the laboratory and outdoor conditions were studied. The highest growth was found at 2M NaCl (1.33 +/- 0.12 d(-1)) for outdoor conditions. The highest cell numbers were observed at Ayvalik strain for both laboratory (8.06 +/- 0.40 x 10(6) cell ml(-1)) and outdoor conditions (5.83 +/- 0.19 x 10(6) cell ml(-1)). The minimum cell numbers determined at 3M NaCl cultures for laboratory experiments while it was found at 1M NaCl for outdoor cultures. It was measured that the cell volume of laboratory cultures (67.6 +/- 14.4 - 198.7 +/- 9.8 mu m(3)) were higher than outdoor cultures (48.7 +/- 9.7 - 110.5 +/- 4.9 mu m(3)). The total chlorophyll (a+b) and carotenoid contents were the highest at laboratory cultures for all salinity concentrations (p<0.05). The total chlorophyll and carotenoid concentration increased with salinity increase at outdoor conditions. In this study, growth rates, cell density and pigment content of two strains of D. viridis (Ayvalik and Dalyan) was determined and compared both under controlled laboratory and outdoor conditions with different salinity regimes. The results showed that the growth parameters and the pigment composition of D. viridis Ayvalik and Dalyan strains were strongly dependent on salinity.Öğe Effects of light intensity, salinity and temperature on growth in Çamalti strain of Dunaliella viridis Teodoresco from Turkey(2008) Ak, Ilknur; Cirik, Semra; Göksan, TolgaIn this study, Dunaliella viridis was isolated from Çamalti salt work and its growth rate, cell density, chlorophyll-a and total carotenoids content were studied in a batch system. This strain was cultured at different NaCl concentrations (1, 2 and 3M), different temperatures (25 and 28°C) and different light intensities (50 and 75 ?mol photon/m2/sec). In this experiment maximum growth rate was at 2 M salinity with 28°C temperature and 50 ?mol photon/m2/sec light intensity. Maximum cell density for D. viridis was obtained at 25°C, 50 ?mol photon/m2/sec, 2M cultures. The highest chlorophyll-a and total carotenoids were calculated as 2.84±0.50 and 1.11±0.05 pg cell-1, respectively. The optimum temperature and salinity for growth of D. viridis strain were around 25°C and 2 M NaCl. The present study shows that cell densities and pigment yields of D. viridis Çamalti strain are strongly dependant on salinity, temperature and light intensity. © 2008 Asian Network for Scientific Information.Öğe Entansif balık kültüründe Gracilaria verrucosa (Hudson) papenfuss yetiştiriciliği(2006) Turan, Gamze; Ak, İlknur; Cirik, Semra; Koru, Edis; Başaran, Aslı KaymakçıBu çalışmada, kırmızı alglerden Gracilaria verrucosa (Hudson) Papenfuss türünün balık üretimi {Sparus aurata, Dicentrarchus labrax) yapılan ağ kafes sistemlerindeki yetiştiricilik yöntemleri araştırılmıştır. Araştırma, İzmir ili Seferihisar (Sığacık) ilçesinde bulunan özel bir ağ kafes işletmesinde 01 Nisan 2002 - 01 Ocak 2003 tarihleri arasında gerçekleştirilmiştir. Yapılan çalışmada, ağ - kafes işletmesinde Gracilaria verrucosa alginin beş farklı yetiştiricilik tekniği denenmiştir. Bunlar; ağ kafeslerin bulunduğu koyda dipte yosun talluslarının doğal substratuma bağlanarak yetiştirilmesi, yosun talluslarının farklı göz açıklığındaki ağların içine konularak yetiştirilmesi, ağ kafeslerin yanında halatlarda yetiştirilmesi, ağ kafeslerin içinde halatlarda yetiştirilmesi ve ağ kafeslerin yanında alg talluslarının fileler içinde yetiştirilmesi şeklinde olmuştur. Deneme süresince 6. verrucosa biyoması ve su parametreleri ölçülmüştür. Çalışmanın sonucunda en iyi gelişim, alglerin filelerin içine konularak yapılan yetiştiricilik yönteminde olduğu ve biyomas ile su sıcaklığı arasında yakın bir ilişkinin varlığı saptanmıştır. En yüksek spesifik büyüme oranı (% 5.82 biyomas/gün) Kasım ve Aralık aylarında ölçülürken, en düşük spesifik büyüme oranı (%-9.95 biyomas/gün) Temmuz ayında ölçülmüştür.Öğe Gracilaria verrucosa (Hudson) papenfuss production in intensive fish culture(Ege Univ, 2006) Turan, Gamze; Ak, Ilknur; Cirik, Semra; Koru, Edis; Basaran, Ash KaymakciIn this study, five different culture techniques of a red macro algae Gracilaria verrucosa (Hudson) Papenfuss at a commercial marine fish farm located in Sigacik Bay (Seferihisar, Izmir) were examined. The experiment was performed between 01 April 2002 and 01 January 2002. Known five different culture techniques of G. verrucosa were applied at the fish cages. These are culturing the algae at bottom by tying the thalli to the natural substratums, culturing the algae at the bottom in different mesh-size net-bags, culturing the algae on the ropes near the fish cages, culturing the algae on the ropes in the fish cages and culturing the algae in the net-bags near the fish cages. During the study biomass values and water quality parameters were measured and recorded. From the result of this study, the best culture technique was determined as culturing the algae in the net-bags near the fish cages. The highest spesific growth rate (5.8%/day) in November and December and the lowest spesific growth rate (-9.9%/day) in July were calculated.Öğe Greenhouse Cultivation of Gracilaria verrucosa (Hudson) Papenfuss and Determination of Chemical Composition(Central Fisheries Research Inst, 2010) Cirik, Sukran; Cetin, Zerrin; Ak, Ilknur; Cirik, Semra; Goksan, TolgaThe agarophyte Gracilaria verrucosa (Hudson) Papenfuss was cultivated under greenhouse conditions in Modified Johnson Medium over a 5-month period. Biomass productivity ranged between 5.00 g L-1 to 16.37 g L-1 and the highest biomass was obtained in December. Relative growth rate (RGR) varied from 4.03 +/- 1.63 to 1.21 +/- 0.34% day(-1). While the highest percentages of protein were found in December (20.28 +/- 0.94% of dw), the lowest percentages were in March (14.99 +/- 0.14% of dw). Phosphorus content ranged from 101.66 +/- 3.11 ppm (march) to 114.03 +/- 5.44 ppm (december). The lipid concentrations of G. verrucosa were measured within 2.39 +/- 0.77% dw and 2.66 +/- 0.94% dw. The agar yiel were determined between 9.65 +/- 1.12 and 18.64 +/- 2.38% of dw in december and march. The melting and gelling temperatures were stable through the experiment. The highest and the lowest values for both melting and gelling temperatures were 39.00 +/- 0.35 degrees C (december) - 34.00 +/- 0.32 degrees C (march) and 86.50 +/- 0.30 degrees C (march) - 85.50 +/- 040 degrees C (february), respectively. As a result of this study G. verrucosa could be cultivated in greenhouse conditions succesfully. Depending on the high growth rates, high concentrations of crude protein, phosphorus and agar of Gracilaria we conclude that it can be cultivated in greenhouse conditions.Öğe Growth characteristic of Nannochloropsis sp (Eustigmatophyta) in tubular photobioreactor in winter period(Ege Univ, Fac Fisheries, 2007) Gokpinar, Sevket; Goksan, Tolga; Cirik, Semra; Ozbas, BircanIn our country, microalgae cultures in the marine fish larvae hatcheries are carried out in transparent polyethylene bags due to the low investment costs. However, such methods, which are considered unproductive with respect to phototrophic production, result in high production costs due to the requirements of large area and high manpower. In this respect, tubular and panel photobioreactors are the productive systems having higher illumination surface and running at higher photosynthesis rate. In the experiments, BioFence tubular photobioreactor, a commercial microalgae culture system in 600 liter volume and 3 cm outer diameter, was used. The growth of Nannochloropsis sp., grown in the tubular photobioreactor outdoors in both batch and continuous culture modes during 47 days, was observed in the study. Accordingly, the cultures that were begun with a cell density of 16 x 10(6) cells ml(-1), were carried out 22 days in batch mode, and reached to 320 x 10(6) cells ml(-1) at end of the trial. The culture was shifted to the continuous mode when the cell precipitation was observed on the bottom of the tubes due to the high cell density. The continuous mode, which was initiated just after the batch mode, was carried out 25 days. Although the system had a short illumination cycle, e.g., 7 hours a day, due to the location the system set up and the season, the system produced 81 L culture per day at an average cell concentration of 208 cells ml(-1) during the experiment. As a result, it was shown that a tubular photobioreactor outdoors ran more efficient than the bag cultures.Öğe The effects of different light intencities on the Gracilaria verrucosa (Hudson) Papenfuss Culture(Ege Univ, 2008) Koru, Edis; Cirik, Semra; Turan, Gamze; Ak, Ilknur; Basaran, AsliIn this study, a culture of a red macro algae Gracilaria verrucosa (Hudson) Papenfuss in the continuous water flow indoor 20 lt tank systems with different light intensities was examined. During the study, continuous water exchange was supplied by a water pump from the sea into the tanks. The water flow was recorded as 1. 44 m(3).day(-1). Daily 12 hrs illumination and 12 hrs dark photo-period cycle was applied above the water surface area in the tanks. During the illumination period, 1000 and 3000 lux light intensities were supplied. During the 3-month study period between November 2002 and January 2003, the water temperature was ranged between 8.7 and 20 degrees C. During the experiement G. verrucosa biomass and water quality parameters were measured and recorded periodically. From the result of study, it was concluded that the light intensity and temperature affected growth of algae, and there was no significant differences recorded between the algal growth measured grown at 1000 lux and 3000 lux light intensities, even algal growth was measured higher at 3000 lux light intensity.Öğe Türkiye'den yeni bir Rhyacodrilin (Bothrioneurum vejdovskyanum Štolc, 1886) Kaydı(2017) Odabaşı, Serpil; Arslan, Naime; Cirik, SemraBu çalışmada, Bothrioneurum vejdovskyanum ?tolc, 1886 türünün Türkiye'den ilk kaydı rapor edilmiştir. Mayıs 2009 periyodunda Karamenderes Çayı-Çanakkale'den toplanan türlerin, habitat ve çevresel değişkenlere ait bilgileri verilmiştir
