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Öğe Assessing Seferihisar-İzmir (Türkiye) geothermal energy prospects through marine seismic and field geology data modelling(Pergamon-Elsevier Science Ltd, 2025) Kılınç, Gizem; Çifci, Günay; Okay Günaydın, Seda; Hasözbek, Altuğ; Gürçay, Savaş; Güngör, Talip; Demirkiran, ZülfüSeferihisar (Izmir) is one of the most significant geothermal regions in the Aegean of Western Anatolia, Turkiye, due to its high geothermal gradient, extensive fault systems, and unique interaction between marine and meteoric waters that create distinct geothermal reservoirs. This study evaluates the geothermal potential and geological characteristics of the Seferihisar area by integrating marine seismic data with onshore geological observations. Specifically, this study combines: (i) geological and geochemical data from geothermal wells along the Tuzla Fault, (ii) high-resolution multichannel seismic reflection data from the Sigacik and Kusadasi Bays, and (iii) correlated onshore and offshore geological and geophysical datasets to develop a 2D conceptual cross-section and a 3D fault model. Geochemical analyses, including water geochemistry, XRF, and isotope studies, reveal that geothermal fluids in the region originate from a mix of meteoric and marine sources. Chloride concentrations in geothermal wells reach approximately ranging from 11,692 to 12,000 ppm, confirming significant seawater intrusion, while geothermometers estimate reservoir temperatures in the range of 220-280 degrees C. Isotopic data, such as He-3/He-4 ratios (similar to 0.9 Ra), suggest minor mantle involvement, and Ar-40/Ar-36 ratios ranging 301 that indicate crustal contributions to the geothermal fluids. These isotopic signatures provide critical insights into the sources and circulation dynamics of geothermal systems. Through integrated 2D conceptual cross-sections and 3D fault modeling, the study identifies the marine extension of the Tuzla Fault and its role in fluid dynamics, including up-flow and out-flow processes. The fault's continuities are linked to geothermal gradients and active fluid pathways, making the Tuzla Fault a critical target for geothermal exploration. The harmonized models suggest three potential drilling sites with high thermal gradients and fault-controlled fluid flow, optimizing the exploration strategy. Scaling and corrosion challenges in production wells are addressed through the application of inhibitors, which are integral to ensuring sustainable operation and long-term system performance. These multidisciplinary findings provide likely actionable insights into optimizing resource extraction, reducing environmental impact, and improving the long-term performance of geothermal systems. The study supports sustainable geothermal energy development in the Seferihisar region by addressing production challenges and guiding effective resource management.Öğe Comparative study on ship wave making resistance via viscous and IBEM solvers(Elsevier Ltd, 2021) Özdemir, Yavuz Hakan; Coşgun, Taner; Barlas, BarışThe present paper concerns the numerical modeling of the free surface flow around the Wigley hull using viscous and potential flow based solvers over a range of Froude Numbers from 0.22 to 0.48. Numerical results of the in-house iterative boundary element method (IBEM) code and unsteady Reynolds Averaged Navier-Stokes (URANS) CFD tool presented in comparison with the range and average of the experimental data from the literature. The study aims to identify the Froude number envelope in which potential and viscous solvers work well, and match the results with the physical behavior of the flow. The results reveal that both methods are capable of predicting the wave-making resistance in satisfactory agreement with the experiments at intermediate Froude Numbers. IBEM exhibits slightly better accuracy at very low operating velocities. When the ship is advancing with a forward speed at Fn > 0.4, boundary layer separation related viscous effects and enhancing turbulence in the wake region of the hull cause the IBEM to underestimate the resistance. For low Fns, the deviation from the mean of the experimental data is 5% and 17% for IBEM and URANS, respectively, while the relative errors are calculated as 7% for URANS and 23% for IBEM at the highest Fn. Similarly, when the Fn reaches up to 0.4, the URANS method predicts higher values of wave climbing near the bow region compared to those of the potential solver, while the computations of both methods are very close at lower Fn. Besides these, IBEM enables a greater saving of computational time while reaching through the lower values of Fn. The findings of the study reveal that the present IBEM approach provides quick and reliable numerical solutions till the effect of viscous stress becomes non-negligible (which is Fn < 0.4 for investigated Wigley case), and up to this range, the accuracy of the method is inversely related to the ship velocity.Öğe Current condition of the Dardanelles Campaign shipwrecks from a diver's point of view and technical diving requirements(Turkish Marine Research Foundation-Tudav, 2023) Kedioğlu, Çetin; Öz, Melike İdilDive surveys were carried out to the Irresistible, AE2 submarine, HMS Majestic, Lundy, SS Milo, Louis, Ariburnu Barge, Ariburnu Lighter, Helles Barges and the Unknown shipwreck, all belonging to the Allied Powers, which sank around the Gallipoli Peninsula during the Dardanelles Campaign of the Word War I. Providing a preliminary information and recommendations for divers of any purpose were aimed, together with the comparison of the original and current conditions of ships, diving plans in consideration with sea and weather conditions and what to see from a perspective of marine biodiversity.Öğe Shipwrecks of The Gallipoli Campaign and Protection of Marine Biodiversity Preface(Turkish Marine Research Foundation-Tudav, 2023) Öz, Melike İdil[Anstract Not Available]Öğe Nonlinear roll damping coefficients and natural frequency estimation via augmented extended Kalman filtering for floating body(Taylor & Francis Ltd, 2024) Özdemir, Yavuz HakanThe nonlinear roll damping coefficients and natural frequency of a floating body are discussed in this article using an augmented Extended Kalman Filtering (EKF) method. This paper presents a non-linear model-based observer for the combined estimation of free roll decay motion states and damping coefficients. The identification framework uses an improved extended Kalman filter (EKF) to deal with model parameter variability and noisy measurement input. The estimated error was compared to the theoretical results obtained from the covariance matrix for filtering correctness. It is found that the nonlinear damping coefficients and natural frequency obtained from the EKF approach are a more realistic representation of the roll dynamics from the general estimation procedure given by the literature. The proposed method also has the built-in capability to remove random noise from the measured roll. The influence of noise levels in the measurements on the identification accuracy was investigated and discussed.Öğe Physicochemical Characterization of Biomineralized Structures of Sea Pen Pteroeides spinosum (Ellis & Solander, 1786) (Octocorallia: Pennatulidae)(Springer Int Publ Ag, 2025) Erdoğan, Sevil; Özalp, Hasan Barış; Taşdelen, BetülIn this study, biomineralized polyp leaf spicules and the endoskeletal axis of the coral Pteroeides spinosum were physicochemically characterized by FTIR, SEM, EDX, TGA, XRD, ICP-MS, and ICP-OES analyses. The mineralized inner axis and polyp leaf spicules of P. spinosum were also pulverized and incorporated into the polyacrylamide (PAAm) hydrogel structure. In vitro bioactivity of coral polyp leaf spicules was evaluated by using simulated body fluid. Characterization analyses identified the major crystalline phase of coral polyp leaves spicules and the inner axis as calcite. The coral's inner axis exhibits a notched and perforated surface morphology. Calcite sclerites obtained from polyp leaves exhibit a crystalline structure and smooth surface morphology. TGA results revealed the organic matter in the coral individual is higher than that of the polyp leaf spicules. It resulted the coral's inner axis was compatible with the PAAm hydrogel. Coral polyp leaf spicules did not form apatite on their surface in simulated body fluid. The calcite content of the coral P. spinosum can be evaluated as an inert additive to improve mechanical properties and thermal stability in hydrogels.Öğe Assessment of initial investment strategies for different farm-scale scenarios with economic cost analyses in offshore salmon farming(Walter De Gruyter Gmbh, 2024) Yiğit, ÜmütThe simulation of investment strategies with different farm-scale scenarios has been evaluated for best management plan in cage farming business for the establishment of a salmon production with either full capacity - or progressive investment. Economical revenues were analyzed with business risk assessment based on operating-and fixed costs for each of the four scenarios. In the theoretical model projected for the stimulation of best management plans, structural elements for the construction of an offshore Turkish salmon farm in the Black Sea were designed and investment costs for an annual production capacity of 4,000 tons were re-scaled by 25, 50 and 75% reduction, corresponding to 3,000, 2,000 and 1,000 tons per year, respectively. Economic variables of operational costs were comparatively evaluated with the revenues and annual profit conditions by sales of harvested fish. The break-even points for all investment strategies with different farm-scale scenarios were remarkably lower (on average 302,574.7 kg/year) than the harvest yields from the farms (on average 3,702,857.1 kg/year). Based on break-even points and margin of safety (MOS over 85%), all farms gained net profits with low risks in the first year, whether the farm received full investment, or initiated business with reduced investment expenditures for a gradual and progressive expansion plan. Findings of this study exhibit useful indications for farm management in understanding conditions of a step-wise establishment of business plans for salmon farming in offshore conditions.Öğe Exploring ChatGPT's role in healthcare management: Opportunities, ethical considerations, and future directions(Routledge Journals, Taylor & Francis Ltd, 2024) Atalan, Abdulkadir; Keskin, Abdulkadir; Özer, SüleymanThe ChatGPT initiative, an advanced AI application, has gained significant attention in diverse sectors, including business, technology, and research. Despite its novelty, it has been accepted across various domains, sparking discussions and shaping roadmaps. This article reviews different perspectives on ChatGPT, highlighting existing literature's prevailing lack of standardized evaluation methodologies. The study examines ChatGPT among natural language processing models, exploring its merits, drawbacks, limitations, and future expectations for its application in health quality and management. A meticulous analysis of 104 publications, covering titles, abstracts, and keywords, was independently conducted, addressing four main and seven sub-subjects. The review utilized PubMed, Scopus, Google Scholar, ScienceDirect, and preprint databases such as medRxiv, arXiv, and SSRN to select relevant articles. ChatGPT is expected to efficiently process and analyze extensive healthcare data, facilitating data-driven decision-making for healthcare organizations to enhance their services. However, it is crucial to acknowledge that ChatGPT models are incomplete substitutes for human healthcare professionals and have limitations in addressing complex medical issues. Consequently, this study underscores the imperative for full human supervision in medical services, emphasizing the essential role of humans in ensuring the quality and effective management of healthcare services.Öğe Cheliped loss and abnormalities of the narrow-clawed crayfish, Pontastacus leptodactylus (Eschscholtz, 1823) (Crustacea: Decapoda: Astacidae)(Soc Brasileira Carcinologia, 2024) Berber, Selçuk; Kale, Semih; Acarlı, 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 Estimation of ship roll damping and natural frequency using an extended Kalman filter applied to URANS output(Springer, 2023) Özdemir, Yavuz HakanThis article discusses an alternative way of evaluating the roll damping coefficient and natural frequency of a floating body. Experimental values are required for the data assimilation process. In this study rather than performing an actual experiment, pseudo-experimental values were derived through computational fluid dynamics (CFD). An extended Kalman filtering (EKF) technique with CFD for estimation of the equivalent linear damping coefficient and natural frequency of free roll decay motion was determined. For the free roll decay motion, the roll angle values obtained from the CFD simulations were given as input to the EKF, and the parameter estimation was performed. CFD analyses were performed to simulate free roll decay by using the Unsteady Reynolds-Averaged Navier-Stokes (URANS) approach with success. Using calculated data of roll response inverse analyses were carried out to identify roll damping and natural frequency for the 3-D floating body. The effects of uncertainty in the process and measurement noise statistics on performance were examined. The measured residual was compared to the theoretical estimate for filtering correctness. It is found that the variation of the damping coefficient and natural frequency with time was determined by EKF within very small error limits.Öğe Ghost fishing over the shipwrecks of Gallipoli Campaign (Canakkale, Turkiye)(Turkish Marine Research Foundation-Tudav, 2023) Acarlı, 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 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 Institute, 2023) Kale, Semih; Berber, Seçuk; Acarlı, Deniz; Gürkan, ŞuleFisheries 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 Temporal variations in hematological, immunological and serum biochemical parameters of rainbow trout (Oncorhynchus mykiss) acclimated to high-saline water in the Northern Aegean Sea(Walter De Gruyter Gmbh, 2023) Büyükateş, Yeşim; Kesbic, Osman; Yiğit, Murat; Yılmaz, Sevdan; Ergün, Sebahattin; Bulut, Musa; Özalp, BarışThe present study evaluated the health status of rainbow trout (30.24 +/- 5.34 g) acclimated to high-saline water (28 parts per thousand). Among adaptation procedures, gradually-acclimated (for 48 h) fish showed best performance, which were then introduced to the offshore cage-farm for further monitoring of fish health in marine environment over a long-term period of 100 days, until harvest weight of 319.9 +/- 48.51 g. Fish health and welfare was evaluated by means of biochemical parameters (viscerasomatic index, hepatosomatic index, mesenteric fat index, and spleen somatic index), hematological parameters (serum glucose, triglyceride, cholesterol, total protein, albumin, globulin), and immune parameters (lysozyme, myeloperoxidase, respiratory burst and potential killing values). Gradual acclimation to high-saline water did not show any adverse effects on health parameters. No significant differences were found in biometric measures (P>0.05). However, a time-dependent increase was recorded in hematology markers (P<0.05) after seawater transfer, and the health status improved over long-term from March 7 to June 14, 2018. All serum biochemical markers, except the total protein showed significant alterations (P<0.05) in long-term but without detrimental influence by day-100. Therefore, it seems possible to expand trout farms from brackish water sites to higher saline environments up to 28 parts per thousand salinity, with no detrimental impacts on fish health, that in turns may significantly contribute to the extension of potential aquaculture sites to wider areas.Öğe Length-Weight and Otolith Morphometry Relationships of Hoplostethus mediterraneus Cuvier, 1829 from the Saros Bay, Northern Aegean Sea(Springer Int Publ Ag, 2025) İşmen, Ali; Yığın, Cahide Ciğdem; Öz, Melike İdil; Arslan İhsanoğlu, MukadderThe relationship between total length (TL) and total weight (TW) and the morphometric relationships of the otolith between total length and otolith length (OL), total length and otolith weight (OW) and otolith length and otolith weight of Hoplostethus mediterraneus were examined in Saros Bay, North Aegean Sea, T & uuml;rkiye. The samples were collected with commercial trawls in Saros Bay from September 2006 to September 2008. A total of 970 specimens were caught at depths of 100-500 m. The average value of fish length was 11.86 +/- 0.14 cm (4.0-22.1 cm), and weight 32.2 +/- 1.0 g (0.83-148.75 g). Otolith size was measured with a minimum of 4.31 mm and a maximum of 12.88 mm. The relationships between TL and TW, OW and OL, OL and TL, OW and TL and OW and OL were determined as TW = 0.010*TL3.10 (r2 = 0.99), OW = 0.0004*OL2.64 (r2 = 0.99), OL = 0.055*TL + 0.564 (r2 = 0.98), OW = 0.0002*TL2.38 (r2 = 0.98), and OW = 0.0004*OL2.64 (r2 = 0.99). The high correlation coefficients (r(2) values) demonstrate the reliability of the established equations, offering a robust framework for estimating the size and weight of this species based on otolith measurements. This study provides crucial insights into the growth patterns and morphometric relationships of Hoplostethus mediterraneus, which can be used to enhance fishery management and conservation efforts in Saros Bay.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) Acarlı, Sefa; Kızılkaya, Bayram; Vural, Pervin; Berber, Selçuk; Kale, Semih; Acarlı, 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 New species of freshwater molluscs from Gokceada (northeastern Aegean Sea), Turkey (Gastropoda: Hydrobiidae, Bythinellidae)(E Schweizerbartsche Verlagsbuchhandlung, 2019) Odabaşı, Serpil; Odabaşı, Deniz Anıl; Acar, SeçilFor centuries, scientists have been inspired by island ecosystems in terms of their biodiversity and physical environment. Because freshwater and terrestrial ecosystems of the Aegean Islands have undergone processes of formation and geographical isolation differentiating them from the adjacent mainland, they have attracted many scientists. Although several papers describing the freshwater molluscs of these islands have been published, there is no such study about the Turkish islands of Gokceada and Bozcaada located in the northern Aegean Sea. This study describes the diversity of the freshwater mollusc fauna of Gokceada. Sampling of freshwater snails by kick-net and hand-collection was carried out throughout the island, covering diverse habitats including fountains, streams, and artificial ponds. The findings include the first records of Dreissena polymorpha and Pisidium subtruncatum from Gokceada and the invasive gastropod Physella acuta. Furthermore, we present descriptions of the anatomy and shells of four new species of freshwater snails: Pseudamnicola cirikorum sp. n., Pseudamnicola radeae sp. n., Grossuana kayrae sp. n., and Bythinella gokceadaensis sp. n. We compare these new species (except G. kayrae sp. n.) with previously described congeners from the Sporades, mainland Greece, and western Turkey. Because Grossuana had previously not been recorded from Turkey, G. kayrae is compared with Greek and Balkan (southwestern Thrace) Grossuana species.Öğe Macrofloral and macrofaunal biodiversity on the shipwrecks of the Gallipoli Campaign - Life on the deadliest battleships(Turkish Marine Research Foundation-Tudav, 2023) Öz, Melike İdil; Acarlı, Deniz; Kedioğlu, Çetin; Özalp, Barış; Evcen, AlperA total of 127 macro organisms; 17 floral and 110 faunal, were identified by means of in situ observations on 7 of the Gallipoli Campaign shipwrecks. Twenty species have economical value and four species were determined to have been in IUCN List of Threatened Species on different levels. Protection measures should be taken not only for the sunken ships but also for the marine life growing on them.Öğe Marine invertebrate fauna (Porifera, Anthozoa) and biodiversity status on the historically important wreck sites of HMS Majestic and Helles Barges (Northern Aegean coast of Turkiye)(Turkish Marine Research Foundation-Tudav, 2023) Evcen, Alper; Özalp, Hasan BarışIn this study, the sponge and Anthozoa fauna on the shipwreck sites (Majestic, Helles Barges), was studied. A total of 24 sponge species and 5 anthozoan were identified, 1 of which Pseudosuberites sulphureus is reported for the first time from the North Aegean coasts of Turkiye.Öğe Distribution of the critically endangered fan mussel Pinna nobilis population in the Canakkale Strait and Marmara Sea(Ege Univ, Fac Fisheries, 2024) Acarlı, Sefa; Acarlı, 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 Impacts of Brent Crude Oil Price Fluctuations on Global Aquaculture Production During World Economic Crises(2024) Yiğit, ÜmütThis study evaluates the linkage between brent crude oil prices and volatility spillover on the global aquaculture volume -and values during world economic crises. Besides the main variable costs comprising feed expenses with over the half of total costs in aquaculture facilities, the energy expenditures are among the important operational costs that influence farm profits through feed costs overall, but also with direct effects in recirculating systems as electricity use. Findings in this study evidenced that global aquaculture volume and value is closely related to global brent crude oil price variations during the periods of crises, as a result of increase in production costs. The correlations between brent crude oil prices and percent changes in volume -or values of farmed fish covering the crises periods between 2008 and 2021 were highest as 0.798 (R=0.798134676) and 0.716 (R=0.715832960), respectively, which are close to zero “0”, showing strong correlations between the investigated structures. However, no correlation was found between the investigated structures during the pre-crisis, post-crisis or inter-crisis periods. Over the last ten years, there were three periods when brent oil prices dropped remarkably, with interrelated effects on world aquaculture production volume or values with severe price dip following the brent oil trends. Hence, the results from this study reveal that any severe change in the energy sector will in turn hit the aquaculture industry with significant influences on both production volume -and values. Therefore, information regarding the interrelation of brent crude oil price variations and global aquaculture production provided in this study, may support building management strategies for sustainable fish farming business with foresights to world economic crises.
