Browsing by Author "Karaca, Ismail"

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Investigation of the Effects of Physico-Chemical Environmental Conditions on Population Fluctuations of Notonecta Viridis Delcourt, 1909 (Hemiptera: Notonectidae) in Van Lake by Using Zero-Inflated Generalized Poisson Regression
(Entomological Soc Turkey, Ege Univ, 2011) Yesilova, Abdullah; Ozgokce, Mehmet Salih; Atlihan, Remzi; Karaca, Ismail; Ozgokce, Fevzi; Yildiz, Sukran; Kaya, Yilmaz
In ecological studies, it is a common situation occured that population density of species extremly increases or decreases in certain periods depending on many abiotic and biotic factors. Because of ecologial factors that cause high level fluctuation in population density, It is possible to get zero individual at samplings, and on the other hand, differences between maximum and minimum values obtained in different samplings intervals can be very high. Because this type of data based on counting does not show normal distribution, and shape of the distribution is skewed to the right because of the abundance of zero, using the Zero-inflated Poisson regression method (ZIGP) is required. This study was carried out to obtain information on effects of physico-chemical environmental conditions on population fluctuation of Notonecta viridis. Samplings were conducted with monthly periods along the coastal band of Van Lake in 2005-2006. Samples were taken from 20 sampling places where have three different characters as stream entrances, settlements and natural coastlines. Reults were analysed by using ZIGP regression model. According to results, Effect of sampling intervals and sampling stations on population densities of Notonecta viridis were important. On the other hand, HCO3 had negative effect on population densities in zero-inflated model while it had possitive effect on population densities in other two models. It was determined that Fe effected the species populations in the negative way in the mean regression model, and Cl and Mg effected it in possitive way in the overdispersion regression. In the result, it was deductived that Notonecta viridis was found excessive numbers or none in some sampling stations because of the pysico-chemical structures of water.
Life Table Characteristics of Orius Minutus (L.) (Hemiptera: Anthocoridae) Feeding on Bemisia Tabaci (Gennadius) (Hemiptera: Aleyrodidae) at the Laboratory Conditions
(Parlar Scientific Publications (p S P), 2015) Efe, Davut; Ozgokce, Mehmet Salih; Karaca, Ismail
In the study, life table of Orius minutus (L.) (Hemiptera: Anthocoridae) feeding on Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) was constructed at the laboratory conditions adjusted to 25 +/- 1 degrees C, 65 +/- 10 % relative humidity and 16 hours of artificial light. B. tabaci used as prey was reared on cotton plant at climatic chamber. As a result of the study, it was determined that total developmental period and mortality rate of O. minutus female and male were 19.80, 20.54 days and 23%, 24% respectively; longevity of O. minutus were 57.40 days for female and 29.98 days for male. Pre-oviposition, oviposition and postoviposition periods were 3.84, 34.20 and 19.00 days, respectively, daily egg numbers were 3.69 and total egg numbers were 180.97. Reproductive value reached the highest value at 5th days of oviposition period. Intrinsic rate of increase (r(m)) was 0.121 female/female/day, net reproductive rates (R-o) was 60.446 females/female, mean generation time (T-0) was 33.892 days, gross reproductive rate (GRR) was 78.684, doubling time (T-2) was 5.727 days and finite rate of increase (lambda) was 1.129. The most appropriate reproduction curve was calculated by Enkegaard equation and parameters were found as follows; a = 0.711 +/- 0.049; b = 0.09+/-10.004; R-2 = 0.926. Weibull distribution was used to determine the best curve showing survival rate for females and males of Onus minutus and parameters were found as follows; for females, b = 57.4+/-0.019, c= 2.26+/-0.007, R-2 = 0.818; for male, b = 31.67+/-0.014, c = 1.77+/-0.0.06, R-2 = 0.918.
Life Table of Aspidiotus Nerii Bouche (Hemiptera, Diaspididae) on Six Potato Varieties at the Laboratory Conditions
(Parlar Scientific Publications (p S P), 2019) Erol, Alime Bayindir; Ozgokce, Mehmet Salih; Karaca, Ismail
Aspidiotus nerii Bouche (Hemiptera, Diaspididae) is a polyphagous species and the host of many effective biological control agents. It has short generation time and produces on potato tubers easily. The oleander scale is commonly used at the mass production studies of many natural enemies. The most appropriate host plant selection to oleander scale is important for mass production studies. The life table is a good way to understand the population dynamic of an organism. In this study, the life table parameters of oleander scale on six potato varieties (Agria, Sante, Marabel, Granola, Vanba and Provento) were estimated by using the Euler-Lotka method at the climatic cabinets which have 25 degrees C constant temperature, 60 +/- 5% relative humidity and 16:8 hours light-dark periods. The life table parameters were calculated as follows: intrinsic rate of increase (r(m)), 0.049, 0.048, 0.045, 0.034, 0.046 and 0.026 females/female/day, net reproductive rates (R-0) 19.35, 18.52, 16.67, 8.31, 16.34 and 5.01 females/female, mean generation time (T-0) 61.15, 60.72, 62.20, 62.79, 60.79 and 62.66 days, gross reproductive rate (GRR) 30.53, 23.90, 20.85, 10.66, 31.76 and 19.72, doubling time (T-2) 14.31, 14.42, 15.32, 20.56, 15.08 and 26.96 days, finite rate of increase (lambda) 1.05, 1.05, 1.05, 1.03, 1.05 and 1.03 females/days, respectively.
Meteorological Risk Assessment Based on Fuzzy Logic Systems for Maritime
(Galenos Publ House, 2022) Karaca, Ismail; Soner, Omer; Saracoglu, Ridvan
In recent years, numerous casualties have been associated with a lack of safe navigation of ships. Despite advanced navigation systems and the implementation of safety management systems onboard ships, maritime safety is still one of the major concerns for the shipping industry. This research proposes a proactive modeling approach that utilizes Fuzzy Logic and Adaptive Neuro-Fuzzy Inference Systems (ANFIS). The model primarily provides continuous meteorological risk assessment for ships to improve marine navigational safety. In the study, Wind Speed, Sea Conditions, Visibility, and Day/Night Ratio are converted to meteorological risk factors using meteorological risk assessment system. Supported by ANFIS, the meteorological risk assessment system has demonstrated that the database contains details of over 180 marine casualty information involving navigation and traffic accidents. The results emphasize that environmental factors, as well as the Day/Night Ratio, significantly influence ship navigational safety. Hence, a meteorological risk assessment system can enhance navigational safety and prevent loss of life in the shipping industry. As a result, a meteorological risk assessment framework has enormous potential for preventing accidents and improving the safety and sustainability of the shipping industry. In this regard, the proposed model is a one-of-a-kind framework that will be extremely useful for mitigating and preventing the effects of maritime accidents.
Modelling of the Arthropod Population Densities in the Coastal Band of Lake Van Using Mixture Poisson Regression
(Parlar Scientific Publications (p S P), 2016) Yesilova, Abdullah; Ozgokce, Mehmet Salih; Atlihan, Remzi; Yildiz, Sukran Polat; Karaca, Ismail; Ser, Gazel
This study is based on periodical surveys of the coastal band of Lake Van. Twenty sampling sites were determined on the basis of 3 different characteristics: stream entrance point, settlement on the coastline, and natural coastline. Macro invertebrates were collected with a standard sweep net, and zooplankton samples were collected using plankton nets. Mixture Poisson regression was used for data analysis. In mixture Poisson modeling, the data set is assumed to have an unobservable heterogeneous structure, causing serious deviations in parameter estimations and standard errors. This heterogeneity is overcome when the data set is divided into homogeneous subpopulations. Thus, homogeneity is achieved for subpopulations but the heterogeneity to be put forward between the subpopulations is unclear. In this study, 20 zooplankton and 7 insect species were found and their populations were separated into 8 subpopulations according to the mixture Poisson regression model. The relationship between species densities and the physicochemical structure of water was statistically significant (p<0.01). In the subpopulations, it was determined that the densities of certain species in areas with the same characteristics were high. This indicates that these species are indicators for these areas.
New Records of Psilophrys Parvulus and Its Host Kermes Bacciformis From Turkey
(Tubitak Scientific & Technological Research Council Turkey, 2009) Japoshvili, George; Kaydan, Mehmet Bora; Karaca, Ismail
During 2007-2008 survey conducted on the Turkey oak (Quercus cerris) in Isparta province Psilophrys parvulus (Hymenoptera: Chalcidoidea, Encyrtidae) and its host Kermes bacciformis (Hemiptera: Coccoidea, Kermesidae) represent new species records for Turkey. Previously, R parvulus was known only from Italy where it was first recorded. The emergence behavior of this parasitoid differs from that of most scale insect parasitoids emerging from the anal opening of its host rather than chewing a hole in the scale insect's test to emerge.
Temperature-Dependent Development of the Tomato Leaf Miner, Tuta Absoluta (Meyrick) (Lepidoptera: Gelechiidae) on Tomato Plant Lycopersicon Esculentum Mill. (Solanaceae)
(Entomological Soc Turkey, Ege Univ, 2016) Ozgokce, Mehmet Salih; Bayindir, Alime; Karaca, Ismail
Laboratory studies on the temperature-dependent development of Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) were performed at 10 constant temperatures ranging from 15 to 34 +/- 1 degrees C. The duration of total development was measured for every temperature. Tayfun F1 tomato variety was used for larval feeding and all experiments were carried out at climatic cabinets where had long daylight period (16:8) and 65 +/- 5% constant humidity for every temperature. According to obtained data, developmental threshold (C) and thermal constant (K) were calculated by using linear regression, and lower (T-min), optimum (T-opt) and upper (T-max) temperature thresholds for total developmental period of pest were calculated by using Polynomial (4th), Logan 6, Logan 10, Lactin 1, Briere 1 nonlinear regresyon models. Development time decreased with increasing temperature ranging from 78.17 days to 21.39 days within the range 15-29 degrees C. Developmental threshold and thermal constant for total development of tomato leaf miner were estimated as 8.94 degrees C and 419.46 degree-days respectively. Lower, optimum and upper temperature requests were estimated with different models and results obtained werein the range 8.9-12.5, 31.00-31.07 and 35.9-38.5, respectively.