Yazar "Sabanci, Fatma" seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim Yok
    Öğe
    Efficiency of different collectors for spat settlement of Mediterranean mussel (Mytilus galloprovincialis) in the southeastern Marmara Sea, Türkiye
    (Taylor & Francis Ltd, 2024) Yildirim, Sukru; Gokvardar, Alize; Erdem, omer Alper; Sabanci, Fatma; Serdar, Serpil; Ertan, Asli
    Mediterranean mussel have spread almost throughout Turkish seas. The objective of this study was to set up longline systems to determine spat efficiency by two different systems (buoy and pipe) consisting of three different materials, new rope, used rope and used net, in Erdek Bay. The second objective was to identify whether waste materials could be used in mussel culture. Sea water temperature, salinity, dissolved oxygen, chlorophyll-a, total suspended, inorganic and organic matter were measured at monthly intervals. Results revealed that the highest settlement (4196 spat) was observed in the collectors made of used nets in the pipe system (October 2016). In contrast, the lowest value (2 spat) was recorded from the collectors made of new ropes in the buoy system (August 2016). Waste materials presented relatively better results on settlement than the new ropes. The optimum production was observed in the mussel farm with 1239 spat in the buoy and 1607 spat in the pipe systems, which were commissioned in April 2016. It is concluded that the spat performance was affected by collectors and materials. Therefore, we propose the use of used ropes and used nets, which will allow more effective attachment surfaces to achieve higher spacing settlement.
  • Küçük Resim Yok
    Öğe
    An illustrated survey on the morphological characters in three species of the diatom genus Mastogloia (Bacillariophyceae)
    (Tubitak Scientific & Technical Research Council Turkey, 2012) Sabanci, Fatma
    The valve morphology of Mastogloia braunii Grunow, Mastogloia pumila Cleve, and Mastogloia vasta Hustedt were investigated using field material. Specimens for study were collected from Homa Lagoon, Izmir Bay, Turkey (4-29 degrees C; salinity 35%0-54%;)) as epipelic and epiphytic (Ulva lactuca L.). The valve morphological characteristics of the 3 species were measured by calibrated ocular micrometer using 20 specimens from each species per station. The valve of M. braunii was 35.15-80.20 mu m in length and 12.35-19.85 mu m in width, the valve of M. pumila was 13.70-31.85 mu m in length and 5.75-9.00 mu m in width, and the valve of M. vasta was 31.20-43.35 mu m in length and 11.90-18.10 mu m in width. The results of Pearson's correlation analysis revealed significant correlations among morphological features and environmental factors. All of the species display a positive correlation between valve length and valve width, and the number of transapical striae in 10 mu m are invariable with changes in environmental factors. Seasonal differences in the morphological features of Mastogloia species were determined by one-way ANOVA analyses. Valve length, valve width, and total number of partecta were the common characteristics showing seasonal variation.
  • Küçük Resim Yok
    Öğe
    The influence of changes in nutrient ratios on several biological processes in Inner Bay of Izmir
    (Central Fisheries Research Inst, 2008) Oezkan, Ebru Yesim; Bueyuekisik, Baha; Koray, Tufan; Sabanci, Fatma
    The dilution method was employed in Inner Bay of Izmir in order to measure the phytoplankton community potential growth rate and grazing rate in May 2005. In this study, the percentage of primary production consumed via grazing and the significance of grazing in food chain were emphasized. The dilution technique was studied on the natural sea water enriched with various Si:N and N:P ratios. Nitrogen limitation was observed in Si:N experiment series. The consumed percentage of primary production via grazing increased with the rising Si:N ratio while the grazed percentage of biomass was decreased. The net growth rate of phytoplankton was greater than the grazing rate at a Si: N ratio of 0.34 and 1.31. For greater ratios, grazing rate became higher than the net growth rate. From the data obtained, it was concluded that microplankton is able to keep the size of the algal populations around the steady state. The Si:N ratio in Izmir Bay is approximately 6 on May 18, 2005. Because of the nitrogen treatment that tends to increase this ratio in the sea water, microzooplankton grazing must limit phytoplankton blooms. The changes in Si:N ratios can account for the 83-98% of the taxon-specific grazing. Prorocentrum gracile, Cylindrotheca closterium and picoplankton were the most abundant species observed constantly both in Si:N ratio and N:P ratio series. Quite few and negative in situ growth rates revealed that nutrient limitation was also of great significance besides grazing on phytoplankton. The N:P ratio of 4 in the environment indicated that Prorocentrum gracile and Cylindrothece closterium would be consumed via grazing and picoplankton would be tinder pressure by nutrient limitation.