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Öğe A new maximum length for the garfish, Belone belone (Linnaeus, 1761) in the coast of Gokceada Island (Aegean Sea, Turkey)(Cahiers De Biologie Marine, 2018) Acarli, Deniz; Kale, Semih; Cakir, KamilA specimen of the garfish, Belone belone (Linnaeus, 1761), was caught in the coast of Gokceada Island, the northern Aegean Sea along the Turkish coasts. Its total length was 93.3 cm and weight was 1120 g. The given size is the maximum observed length value of the species for the Aegean Sea and the other coasts of Turkey. Also, it is the second largest length ever reported in the all seas of the world.Öğe A new maximum length for the grey triggerfish, Balistes capriscus Gmelin, 1789 for the Mediterranean Sea and first confirmed record in the Çanakkale Strait (Turkish Strait System)(2022) Kale, Semih; Tan, EvrenA single specimen of the grey triggerfish, Balistes capriscus Gmelin, 1789, was caught by a speargun at 18 m water depth in the vicinity of the Çanakkale Strait in the Turkish Straits System, between the Aegean Sea and the Marmara Sea. Its total length was 57.8 cm and weight was 2270 g. The given size is the maximum observed length for the grey triggerfish, B. capriscus, in the Mediterranean Sea. In addition, this paper also documented the first confirmed record of the grey triggerfish, B. capriscus in the Çanakkale Strait (the Turkish Straits System).Öğe A Study on Determining the Ideal Stock Density of Freshwater Crayfish (Pontastacus leptodactylus) in Polyculture with Rice (Oryza sativa L.)(Kahramanmaras Sutcu Imam Univ Rektorlugu, 2019) Berber, Selcuk; Kale, Semih; Bulut, Musa; Izci, BahriThis paper aims to determine optimum stock density for rice-crayfish rearing in controlled environment. Juvenile freshwater crayfish (Pontastams ieptodady/us) obtained in the laboratory condition from female freshwater crayfish were stocked into rice planted artificial pond at different stock densit ies (25 individuals m(-2), 50 individuals m(-2), and 100 individuals m(-2)) for the assessment of paddy field areas in terms of field fisheries in Turkey. Results showed that the best survival rate (72%) and growth for juvenile freshwater crayfish in point of length and weight has been observed at the stock density of 25 individuals m(-2). In addition, statistically significant difference has been found between this stock density and the other stock densities (p<0.05). The maximum survival rate was observed as 72% at the stock density of 25 individuals m(-2). The results of this study are significantly different when compared with Other feeding researches on juvenile freshwater crayfish in Turkey. The stock density of 25 individuals m(-2) should be applied to gain maximum yield in rice- crayfish rearing experiments suggested as an alternative met hod for crayfish rearing. This paper. the first study on the investigation of different stock density for rice-crayfish rearing, will shed light on the further researches.Öğe An Adaptive Neuro-Fuzzy Inference System (ANFIS) to Predict of Cadmium (Cd) Concentrations in the Filyos River, Turkey(Central Fisheries Research Inst, 2018) Sonmez, Adem Yavuz; Kale, Semih; Ozdemir, Rahmi Can; Kadak, Ali EslemWater quality is one of the main characteristics of a river system and prediction of water quality is the key factor in water resource management. Different physical, biological and chemical parameters including heavy metals can be used to assess river water quality. Evaluation of the water quality in the rivers is quite difficult and requires more time and effort because of the fact that many factors affect water quality. Traditional data processing methods are insufficient to solve this problem. Therefore, in this study, an adaptive neuro-fuzzy inference system (ANFIS) model was developed to predict the concentrations of cadmium (Cd) in the Filyos River, Turkey. For this purpose, water samples collected at 7 sampling locations in the river during December 2014-2015 were used to develop ANFIS model. The available data set was apportioned into two separate sections for training and testing the ANFIS model. Developed models aimed to use the least parameters to estimate Cd concentration. As a result, a relatively higher correlation (R-2=0.91) was found between observed and modelled Cd concentrations. The results indicated that the ANFIS model gave reasonable estimates for the concentrations of Cd with a high degree accuracy and robustness. In conclusion, this paper suggests that ANFIS methodology produce very successful findings and has the ability to predict Cd concentration in water resources. The outcomes of this research provide more information, simulation, and prediction about heavy metal concentration in natural aquatic ecosystems. Therefore, ANFIS can be used in further researches on water quality monitoring.Öğe An assessment of the effects of climate change on annual streamflow in rivers in Western Turkey(Inderscience Enterprises Ltd, 2018) Kale, Semih; Hisar, Olcay; Sonmez, Adem Yavuz; Mutlu, Fatih; Filho, Walter LealGlobal warming and its impacts are known to cause serious problems in sustainability of natural resources. In this study, change-point analysis and trend analysis were applied to climatic (temperature, precipitation, evaporation) and streamflow data for Tuzla, Gediz and Buyuk Menderes rivers. Box-Jenkins technique and ARIMA model were used for trend analysis. Results showed that there were decreases in streamflow of all rivers. The paper suggests that climate change effects on streamflow could be changeable and that many factors (anthropogenic effects, geographical location, agricultural activities) should be considered. Management strategies specified regionally are required to mitigate the potential climate change effects.Öğe Antioxidant radical scavenging capacity and total carotenoid content of narrow-clawed crayfish (Pontastacus leptodactylus, Eschscholtz, 1823) in Atikhisar Reservoir (Çanakkale, Türkiye)(Walter De Gruyter Gmbh, 2023) Acarli, Sefa; Kizilkaya, Bayram; Vural, Pervin; Berber, Selcuk; Kale, Semih; Acarli, DenizIn this study, antioxidant radical scavenging capacity and total carotenoid content in the meat and shells of Pontastacus leptodactylus were investigated. Concerning the antioxidant scavenging effect, the highest IC50 values were found to be 388.77 mg g(-1) and 155.53 mg g(-1) for females and males in July and March, respectively. The mean IC50 values of the meat were calculated as 239.83 mg g(-1) and 105.21 mg g(-1) for females and males, respectively. The mean total carotenoid content in the meat was found to be 14.35 and 12.78 mu g g(-1) for females and males, respectively. The results indicated that crayfish meat had antioxidant radical scavenging capacity and was rich in carotenoid content.Öğe Catch per Unit Effort (CPUE) for Discard, Bycatch and Target Catch of Trawl Fishery in the Coasts of Gokceada Island (North Aegean Sea, Turkey)(Kahramanmaras Sutcu Imam Univ Rektorlugu, 2022) Acarli, Deniz; Kale, Semih; Cakir, KamilThe aim of the present study is to determine the catch per unit effort (CPUE) for discard, bycatch and target catch of commercial trawl fishery in the coasts of Gokceada Island (Northern Aegean Sea). A total of 19 bottom trawl hauls (99.8 hours) were carried out on the coasts of Gokceada Island in the north Aegean Sea, between March 2015 and April 2017, with commercial trawler. During the study period, 58 species and 7938 individuals belonging to 46 families were caught. In terms of the number of species, the ratios in the total catch for target, bycatch and discard species were calculated as 5.17%, 50.00%, and 44.83%, respectively. Among sampled species, the most caught commercial species were; European hake (Merluccius merluccius), deep-water rose shrimp (Parapaneus longirostris) and blue whiting (Micromesistius poutassou). The total catch amount was calculated as 1146.44 kg. While the catch amount of target species was 817.87 kg (71.34%), the catch amount of bycatch and discard was calculated as 328.57 kg (28.66%). The CPUE value of the targeted species was determined as 31.5 kg operation-1, while the CPUE values of bycatch and discard were calculated as 10.11 and 2.39 kg operation-1, respectively. Moreover, the hourly CPUE value of targeted species was calculated as 8.19 kg hour-1, while the hourly CPUE values of bycatch and discard were determined as 2.63 and 0.62 kg hour-1, respectively.Öğe Cheliped loss and abnormalities of the narrow-clawed crayfish, Pontastacus leptodactylus (Eschscholtz, 1823) (Crustacea: Decapoda: Astacidae)(Soc Brasileira Carcinologia, 2024) Berber, Selcuk; Kale, Semih; Acarli, DenizHeterochely is an important phenomenon in decapod crustaceans. Nevertheless, it was rarely examined in freshwater crayfish. Therefore, the aim of this study was to investigate cheliped loss and abnormalities of the narrow -clawed crayfish, Pontastacus leptodactylus. The crayfish samples were captured using 17 mm mesh -sized fyke-nets from Atikhisar Reservoir in canakkale, Turkey between July 2020 and June 2021. The cheliped loss was classified and compared between sexes and length groups. The cheliped surface was calculated for each specimen for both the right and left cheliped. Results of the study indicate that the percentages of the sampled individuals were 5.46% for the right cheliped missing group, 5.23% for the left cheliped missing group, 10.37% for both chelipeds missing group, and 78.94% for both chelipeds present group. There was a statistical difference between cheliped loss and size groups (p < 0.05). Although cheliped loss is almost non-existent in low -size groups (10.0-29.9 mm), it reaches high values in the 40.0-69.9 mm size groups. The most intense loss occurs in the 40.0-49.9 and 50.0-59.9 mm size groups. It was determined that 10.69% of the sampled individuals examined had a single cheliped (10.03% female, 11.14% male). A statistically significant difference was found between cheliped loss and sex (p < 0.05). The percentage of female and male individuals with no chelipeds is 9.83% for females and 10.73% for males, and with both chelipeds it is 80.14% for females and 78.14% for males. While the number of abnormalities observed in chelipeds was higher in males, abnormalities in both chelipeds were higher in females. Moreover, it was found that cheliped loss significantly differed according to the months of collection (p < 0.05). Cheliped losses increased in July, August, and September when feeding was comparatively intense. In conclusion, the fact that the individuals were obtained alive, was an indication that the abnormalities detected did not significantly affect their vital activities directly. However, morphological abnormalities in the appendages, especially in the chelipeds, may impair their functional use compared to a healthy cheliped. This abnormal condition is assumed to share the disadvantageous limitations experienced by the absence of a cheliped.Öğe Climate change effects on annual streamflow of Filyos River (Turkey)(Iwa Publishing, 2020) Sonmez, Adem Yavuz; Kale, SemihThe main purpose of this study was to estimate possible climate change effects on the annual streamflow of Filyos River (Turkey). Data for annual streamflow and climatic parameters were obtained from streamflow gauging stations on the river and Bartin, Karabuk, Zonguldak meteorological observation stations. Time series analysis was performed on 46 years of annual streamflow data and 57 years of annual mean climatic data from three monitoring stations to understand the trends. Pettitt change-point analysis was applied to determine the change time and trend analysis was performed to forecast trends. To reveal the relationship between climatic parameters and streamflow, correlation tests, namely, Spearman's rho and Kendall's tau were applied. The results of Pettitt change-point analysis pointed to 2000 as the change year for streamflow. Change years for temperature and precipitation were detected as 1997 and 2000, respectively. Trend analysis results indicated decreasing trends in the streamflow and precipitation, and increasing trend in temperature. These changes were found statistically significant for streamflow (p < 0.05) and temperature (p < 0.01). Also, a statistically significant (p < 0.05) correlation was found between streamflow and precipitation. In conclusion, decreasing precipitation and increasing temperature as a result of climate change initiated a decrease in the river streamflow.Öğe Comparison of Juvenile Astacus leptodactylus Growth Raised in Cages in Rice Fields to other Crayfish Juvenile Growth Studies(Central Fisheries Research Inst, 2018) Berber, Selcuk; Kale, SemihThe objective of this study was to determine whether the freshwater crayfish (Astacus leptodactylus Eschscholtz, 1823) rearing can be economically achieved in the rice fields using meta-analysis. For this purpose, 100 juvenile freshwater crayfishes were settled in each of three cages in the rice field and the survival and growth characteristics of juvenile freshwater crayfishes in the rice fields were evaluated for 68 days. The meta-analysis was performed to the present study and nineteen studies where researchers evaluated the survival and growth characteristics of juvenile freshwater crayfish. As a result, initial average length and weight of the individuals were 11.08 +/- 0.097 mm and 0.04 +/- 0.003 g, respectively. They reached to a total of 37.46 +/- 0.872 mm length and an average of 1.46 +/- 0.095 g weight after 68 days. During this period, the survival rate of the juvenile individuals was also determined as 64.67%. The meta-analysis showed that growth in length at a significant rate on the contrary growth in weight. In conclusion, it is suggested that freshwater crayfish rearing in rice fields is a new and applicable alternative method for growth of freshwater crayfish in Turkey.Öğe Crayfish cultivation in Turkey: Past, present and future(CEUR-WS, 2015) Türel, Selçuk; Kale, Semih; Berber, SelçukAs one of the members of the economic crustaceans; the freshwater lobsters or as they are commonly known as crayfish in Turkey, belong to the Decapoda order of Crustacea class from the phylum of Arthropoda. The freshwater lobsters, which have over 640 species in the world, are generally distributed to the continents of America and Australia. Although the freshwater lobsters have an abundant number of species, the economic importance lies with 3 family (Astacidae, Cambaridae, Parastacidae) and around 10 species from those indicated families. The freshwater lobsters in Turkey are represented by two species. Astacus leptodactylus, one of the species is a local one that is abundant around inland water localities while the other species is Austropotamobius torrentium whose existence was determined especially in Thrace area within Marmara Region. However, the production of crayfish in our country is practiced only by the means of fishing and the hunted crayfish are imported to various European countries. However, the crayfish cultivation has a great potential in Turkey due to the facts that Turkey is rich in terms of inland waters and the crayfish may be found in various localities. Copyright © 2015 for the individual papers by the papers' authors.Öğe Current status of critically endangered fan mussel Pinna nobilis (Linnaeus 1758) population in Çanakkale Strait, Turkey(2021) Acarlı, Sefa; Acarlı, Deniz; Kale, SemihThe population of Pinna nobilis (Linnaeus, 1758) has been severely damaged, especiallyby the effect of the disease, in addition to the causes such as fishing activities,overexploitation, environmental pollution, habitat degradation, tourism, and humanimpacts. Particularly, Haplosporidium pinnae caused gigantic destruction in the P. nobilispopulation. Accordingly, the present study aimed to determine the current status of the P.nobilis populations in the Çanakkale Strait. Samplings were carried out between July andAugust 2020 at 9 different stations in the Çanakkale Strait. The results revealed that massmortality was observed at the two stations (Abide Beach and Kumkale Village Beach)located near the Aegean Sea. On the other hand, it has been determined that the lowestmortality rate (9.62%) has been found at Ilgardere station. Juvenile individuals have beenobserved in healthy and uninfected populations with high survival rates. This paper is thefirst document on the spatial distribution of P. nobilis in Çanakkale Strait. Therefore, theP. nobilis population should be continuously monitored to ensure the sustainability of thespecies.Öğe Development of an adaptive neuro-fuzzy inference system (ANFIS) model to predict sea surface temperature (SST)(Walter De Gruyter Gmbh, 2020) Kale, SemihAn accurate estimation of the sea surface temperature of great importance. Therefore, the objective of this work was to develop an adaptive neuro-fuzzy inference system (ANFIS) model to predict SST in the Canakkale Strait. The observed monthly air temperature, evaporation and precipitation data from the Canakkale meteorological observation station were used as input data. The Takagi-Sugeno fuzzy inference system was applied. The grid partition method (ANFIS-GP) and the subtractive clustering partitioning method (ANFIS-SC) were used with Gaussian membership functions to generate the fuzzy inference system. Six performance evaluation criteria were used to evaluate the developed SST prediction models, including mean square error (MSE), root mean square error (RMSE), mean absolute error (MAE), mean absolute percentage error (MAPE), Nash-Sutcliffe efficiency (NSE) and correlation of determination (R-2). The dataset was randomly divided into training and testing datasets for the machine learning process. Training data accounted for 75% of the dataset, while 25% of the dataset was allocated for testing in ANFIS. The hybrid algorithm was selected as a training algorithm the ANFIS. Simulation results revealed that the ANFIS-SC4 model provided a higher correlation coefficient of 0.96 between the observed and predicted SST values. The results of this study suggest that the developed ANFIS model can be applied for predicting sea surface temperature around the world.Öğe Distribution of the critically endangered fan mussel Pinna nobilis population in the Canakkale Strait and Marmara Sea(Ege Univ, Fac Fisheries, 2024) Acarli, Sefa; Acarli, Deniz; Kale, SemihThis study was conducted with the primary objective of determining the presence of both healthy and impacted Pinna nobilis populations along the European coasts of the Sea of Marmara, followed by the identification of P. nobilis abundance and survival rates in the region encompassing the Canakkale Strait and the southern coasts of the Sea of Marmara. Underwater surveys were randomly conducted at 19 distinct stations, including 8 stations along the European coasts of the Sea of Marmara, 7 stations along the southern coasts of the Sea of Marmara, and 6 stations within the Canakkale Strait. SCUBA diving equipment was utilized to record information on habitat structure, water temperature, depth, and visibility at each station. The transect length during underwater surveys and the number of transects at each station were determined based on the condition of the seabed and the size of the area, respectively. Throughout the study period (September 2021 and October 2023), water temperature fluctuated between 17.5 degrees C and 26.6 degrees C. At the end of the study, a total of 395 individuals (147 live, 248 dead) were observed, with live individuals exhibiting total lengths ranging from 16.4 cm to 50.9 cm. This study represents the first investigation into the spatial distribution of P. nobilis along the European coast of the Marmara Sea. The study contributes significantly to enhancing our understanding of the ecology of P. nobilis populations in both the Sea of Marmara and the Canakkale Strait. Additionally, recommendations for the rehabilitation of impacted populations and the conservation of healthy populations have been provided for decision-makers and fisheries managers.Öğe Effect of Climate Change on Annual Streamflow of Bakırçay River(2016) Mutlu, Fatih; Hisar, Olcay; Ejder, Tuba; Kale, SemihKüresel ısınma ve bundan kaynaklanan iklim değişikliği doğal kaynakların sürdürülebilirliği açısından önemli sorunlara neden olmaktadır. Bu çalışmada Türkiye'nin batısında yer alan Ege Denizi kıyısındaki 9 meteoroloji gözlem istasyonuna ait 43 yıllık sıcaklık, yağış, buharlaşma gibi meteorolojik parametreler ile aynı bölgede yer alan ve Ege Denizine dökülen Bakırçay nehrine ait 17 yıllık veri seti kullanılmıştır. İklim parametreleri ile nehir akış hızına ait değişim noktalarının belirlenmesi için Pettitt değişim noktası analizi, eğilimlerin belirlendiği trend analizleri için Box-Jenkins yöntemi ve ARIMA modeli, bu parametreler arasındaki ilişkileri belirlemek için ise Kendall's Tau ve Spearman's rho korelasyon testleri kullanılmıştır. Pettitt testi sonucu sıcaklık, buharlaşma ve yağış miktarları için değişim yılları sırasıyla 1997, 1993 ve 1993 iken Bakırçay nehrinin akış hızı için ise 2008 olarak belirlenmiştir. Gerçekleştirilen trend analizleri sonucunda sıcaklık ve buharlaşma miktarında artış; yağış miktarı ve nehir akış hızında ise azalış olduğu tespit edilmiştir. Ancak bu parametrelerin yıllara göre değişimi ile iklim parametreleri ve nehir akış hızı arasındaki korelasyonların istatistiksel olarak önemsiz olduğu belirlenmiştir (p>0.05). Sonuç olarak iklim değişikliğinin nehir akış hızları üzerine olan etkilerinin değişken olabileceği, küresel ısınmanın nehir sistemleri üzerine etkilerinin belirlenmesinde antropojenik etkiler, coğrafi konum, tarımsal faaliyetler, yerleşim yerleri ve nüfus yoğunluğu gibi birçok faktörün de dikkate alınması gerektiği düşünülmektedir. Ayrıca iklim değişikliğinin nehirlerin hidrolojik süreçleri üzerine olan etkilerinin değerlendirilmesinde bölgeye ve amaca uygun değerlendirme modellerinin kullanılması ve özelleştirilmiş yönetim stratejilerinin geliştirilmesi önerilmektedirÖğe First Knowledge on Data Poor Stock: LWR and Condition Factor of a Recently Established Population of Atherina boyeri in Atikhisar Reservoir, Turkiye(Central Fisheries Research Inst, 2023) Kale, Semih; Berber, Selcuk; Acarli, Deniz; Gurkan, SuleFisheries management practices require reliable data for the assessment of data poor stocks. This paper reported the first knowledge on length-weight relationship (LWR) and condition factor of Atherina boyeri in Atikhisar Reservoir, Canakkale, Turkiye. A total of 1103 individuals of which 132 were immature was captured in June 2021. The sex ratio male to female was 1:1.75. The relationship between weight (W) and total length (TL), standard length (SL), and fork length (FL) were estimated as W=9E-06TL(2.9212), W=1E-05SL(2.9082), and W=9E-06FL(2.9495). A. boyeri exhibited a negative allometric growth. The mean of Fulton's condition factor of A. boyeri population in Atikhisar Reservoir was determined as 0.619 +/- 0.061. The mean Fulton's condition factor for female individuals were higher than the males' condition factor and the difference between sexes was statistically significant. The present study made available valuable information on the data poor stock by providing LWR and condition factor of A. boyeri in Atikhisar Reservoir, a new freshwater system for the very euryhaline amphidromous species. The findings of the present study will substantially contribute to the knowledge of the population dynamics of the commercially important species for fisheries managers and decision-makers to maintain sustainable population levels.Öğe Fish biodiversity in the shallow waters around the Gokceada Island, Turkey(Arman Darya Inc, 2020) Altin, Aytac; Ayyildiz, Hakan; Kale, SemihThe aim of the current study is to determine the fish biodiversity in the shallow waters (0 - 20 m) of Gokceada in the North Aegean Sea. The samples were collected monthly between June 2013 - June 2014 using by a beach seine (0 - 2 m) and beam trawl (5 - 20 m). Field sampling was carried out in two stages. A preliminary sampling survey was carried out in the first phase (March-April 2013). During this period, sampling was conducted in each station around the entire island where sampling gear was feasible to use, and the most productive sampling stations were determined. The second stage was the biodiversity monitoring work. During the study period, 13-monthly sampling surveys were carried out at six seine and dredge stations around the island. During the whole period, a total of 30509 individuals belonging to 80 species were sampled. From the seine samplings (0-2 m), 18702 individuals from 40 species were obtained. The beam trawl samplings (5-10 and 10-20 m) identified 11807 individuals from 66 species. Biodiversity indices were calculated, and species diversities and abundances were determined for the seasons. The most copious seasons in terms of number of species abundance was identified in fall and summer. Fish species diversity and abundance maps were generated for each station. As a result, it was determined that the coastal ecosystems of Gokceada, northern Aegean Sea, incorporated many important habitats that is rich in biodiversity. In addition, many commercial species that had been over-exploited in the region was determined to use these coastal habitats for feeding, breeding, sheltering, and growing.Öğe Ghost fishing over the shipwrecks of Gallipoli Campaign (Canakkale, Turkiye)(Turkish Marine Research Foundation-Tudav, 2023) Acarli, Deniz; Kale, SemihThe phenomenon of ghost fishing, characterized by the persistent capture of marine organisms by lost or abandoned fishing gear, poses a significant threat to underwater cultural heritage, particularly around historic shipwrecks. This study focused on the ghost fishing and its impact on shipwrecks in the Gallipoli Campaign during World War I in Canakkale, Turkiye. Underwater surveys were carried out between July and September 2023. The research explores the entanglement of fishing gear around these shipwrecks, assessing its ecological consequences on marine life and the structural integrity of the shipwrecks. The study also emphasizes the need for comprehensive documentation, monitoring, and management strategies to mitigate the adverse effects of ghost fishing on both biodiversity and historical artifacts. Recommendations include establishing monitoring programs, involving local communities, raising awareness, implementing regulations, and organizing underwater cleanup events.Öğe Gökçeada sığ sularında bulunan sparıdae ailesine ait genç balık türlerinin dağılımlarının cbs ile modellenmesi(Çanakkale Onsekiz Mart Üniversitesi, 2014) Kale, Semih; Özen, ÖzcanBu çalışmanın amacı Gökçeada sığ sularında bulunan Sparidae ailesine ait genç balık türlerinin miktarları, yoğunlukları ve alansal dağılımları ile tercih ettikleri habitat yapılarının ortaya çıkarılması ve Coğrafi Bilgi Sistemi (CBS) ortamında modellenmesidir. Bu amaçla Haziran 2013–Mayıs 2014 ayları arasında toplam 6 istasyonda, ığrıp ve algarna kullanılarak 0-2 m, 5-10 m ve 10-20 m derinlikleri olmak üzere 3 farklı derinlik konturunda aylık olarak örneklemeler yapılmıştır. Örneklemeler sonucunda Sparidae ailesine ait 14 farklı türe ait toplam 7258 adet birey yakalanmıştır. Türlerin derinlik ve habitat tercihleri göz önünde bulundurularak yoğunlukları ve alansal dağılımları tahmin edilmiş olup CBS ortamında modellenmiştir. Genç Sparid türlerinin 0-2 m derinlikleri arasında en çok kumluk habitatları ve 10-20 m derinlikleri arasında deniz çayırları bulunan alanları tercih ettiği gözlenmiştir. Bu çalışmanın sığ sular ve genç balıklar üzerine yapılacak olan çalışmalar ile balıkçılık yönetimi konusunda yapılacak olan çalışmalar için önemli bir kaynak olacağı düşünülmektedir.Öğe İklim değişikliğinin atikhisar baraj gölü'nün yüzey alanı ve kıyı çizgisindeki değişimleri üzerine etkilerinin uzaktan algılama ve coğrafi bilgi sistemi kullanılarak balıkçılık yönetimi açısından izlenmesi(Çanakkale Onsekiz Mart Üniversitesi, 2019) Kale, Semih; Acarlı, DenizBu çalışmanın amacı Atikhisar Baraj Gölü'nde gerçekleşen kıyı çizgisi (KÇ) ve yüzey alanı (YA) değişimlerinin uzaktan algılama ve coğrafi bilgi sistemi kullanılarak belirlenmesi ve izlenmesidir. İklim değişikliğinin KÇ ve YA üzerindeki olası etkilerinin incelenmesi ve balıkçılık yönetimi açısından değerlendirilmesi de hedeflenmiştir. Bu kapsamda, 1975–2017 yılları arasındaki uydu görüntülerinden KÇ ve YA manuel olarak sayısallaştırılmıştır. Sonuç olarak, izleme dönemi boyunca KÇ uzunluğu 12,187km ile 31,7km arasında, YA ise 1,72km2 ile 3,84km2 arasında değişkenlik göstermiştir. Başlangıçtaki değerler ile karşılaştırıldığında KÇ uzunluğundaki en fazla azalma ve artış %35,3 ile %55,6 iken YA'da %38,1 ile %38,1 olarak hesaplanmıştır. KÇ ve YA arasında önemli bir ilişki (p<0,01) olduğu belirlenmiştir. KÇ ve YA'da gözlenen önemli değişimlerin iklimsel değişkenlikler ile ilişkili olduğu tespit edilmiştir (p<0,05). Sıcaklık ve buharlaşmanın artış eğiliminde (p<0,01) yağışın azalış eğiliminde olduğu belirlenmiştir. Sıcaklık–KÇ (p<0,05) sıcaklık–YA (p<0,05), sıcaklık–buharlaşma (p<0,01), yağış–buharlaşma (p<0,05) arasında önemli bir ilişki bulunduğu belirlenmiştir. Su kaynaklarındaki değişimler balıkçılık faaliyetleri ve ekosistemdeki canlı yaşamı üzerinde olumsuz etkilere neden olmaktadır. Su miktarının azalması, YA'nın küçülmesi ve KÇ değişimleri nedeniyle özellikle kıyısal alanlarda yaşayan canlıların yaşam alanları yok olmakta; beslenme, üreme ve büyüme alanları zarar görmektedir. Bu nedenle, su kaynakları üzerinde etkisi olan tüm faktörler dikkate alınarak gerekli önlemler alınmalı, su kaynaklarının sürdürülebilir kullanımı ve yönetimi sağlanmalı, amaca uygun su paylaşım politikaları ve balıkçılığa uygun sahalar belirlenmelidir. Bu çalışma, Atikhisar Baraj Gölü'ndeki KÇ ve YA değişimlerinin izlenmesi üzerine ilk çalışma olup en uzun süreli değerlendirme sunması nedeniyle büyük önem taşımaktadır. Bu bağlamda, bu konu üzerine ileride yapılacak çalışmalara ışık tutacağı düşünülmektedir.
