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Öğe A review of the marine crab fisheries in the Turkish seas(Sciendo, 2018) Harlıoğlu, Muzaffer Mustafa; Farhadi, Ardavan; Ateş, Abdullah SuatThe paper presents a review of the distribution of marine crabs (Brachyura) along the Turkish coast and the amount of economically important marine crabs harvested between 1967 and 2016. Previous records reported that Turkey had 102 brachyuran crab species, only five of them being economically important, but this review identifies two more species, Inachus phalangium and Ashtoret lunaris. The Aegean Sea has more crab species than the Mediterranean, the Black Sea and the Sea of Marmara. The most harvested species are Callinectes sapidus, Maja squinado, Eriphia verrucosa, Carcinus aestuarii and Portunus segnis, respectively. This review shows that there have been fluctuations in the harvest of marine crabs between years, the lowest being 5 tonnes in 2015 and the highest, 2116 tonnes in 1984. The information provided in this review provides a basis for potential profitable development of conservation and management strategies of marine crabs in Turkey. © The Author(s) 2018. Published by University of Zagreb, Faculty of Agriculture. All rights reserved.Öğe Assessment of physical carrying capacity of a mariculture zone designated in the Aegean Sea(Springer, 2024) Yiğit, Murat; Ergün, Sebahattin; Büyükateş, Yeşim; Ateş, Abdullah Suat; Özdilek, H. Göksel; Acar, SeçilThe present study was conducted to evaluate the physical carrying capacity in a mariculture zone designated for cage aquaculture in the Aegean Sea (Mersin Bay, Izmir, Turkiye). Rapid assessment of carrying capacity for the approval of new investments or capacity increase requests environment-regulated timely management procedures for the sustainable development of the drastically growing cage aquaculture industry in the Mediterranean. Hence, the mathematical estimations earlier developed for the Mediterranean area have been applied for the carrying capacity assessment using the data gathered from eight fish farms operating in the area. The data collected from the farms comprised the information such as current granted production level, surface area, location depth, current speed, shore distance, and coordinates of the farm sites. The results obtained showed an estimated carrying capacity for the investigated mariculture zone as 252,852 tons which is about 18 times the current production level of 13,500 tons that was granted in total for the sum of eight cage farms in the region with a total of 50.89-ha surface area. It can be concluded that, with the condition of periodic environmental monitoring to keep the marine ecosystem below eutrophication risk, the production capacity of farms in the designated mariculture zone, comprising a surface area of 50.89 ha, could be increased by 18-fold over the present production level, which is far below the risk threshold. The findings of this study provide important support for decision-makers in the management of intensive cage aquaculture operations in the Mediterranean region.Öğe Composition of Bivalve Community in the Coastal Waters (0–4 m) of the Çanakkale Strait Along With Various Environmental Variables(2024) Yazıcı, Hazal; Ateş, Abdullah Suat; Acar, SeçilThe present study focused on the soft bottom of the coastal waters (0-4 m) in the Çanakkale Strait. The objective was to determine the composition of bivalve species in the area. Sediment samples were collected using a 30×30 cm quadrat system by a SCUBA diver at eight sites between July 2008 and April 2009. The study recorded a total of 2299 individuals belonging to 55 species. The most abundant species in the study area was Lucinoma borealis. A significant positive correlation was found between seawater salinity and species diversity (rs = 0.59; p<0.05). The highest similarity in species diversity between seasons occurred between autumn and summer.Öğe Exotic Polychaetes of a Sewage Pollution Influenced Lagoon (cardak Lagoon, Turkish Straits)(MDPI, 2023) Dağlı, Ertan; Ateş, Abdullah Suat; Acar, Seçil; Büyükateş, Yeşim; Dogan, Alper; Bakır, Ahmet KeremThis paper includes three exotic polychaeta species, Hydroides dianthus (Verrill, 1873), Polydora cornuta Bosc, 1802, and Pseudopolydora paucibranchiata (Okuda, 1937), found during benthic samplings in Çardak Lagoon (Turkish Straits). The sampling was collected from the sandy and silty bottoms known to be polluted by sewage discharges. A total of 45 specimens of exotic polychaetes (H. dianthus: 1; P. cornuta: 4; P. paucibranchiata: 40) were found. The correlation values between the annual average values of the nutrients and the polychaeta abundance showed that the highest positive relationships with the abundance were between sand content, total phosphate, and pH. P. cornuta was the most observed species with a frequency index value of 75%, while H. dianthus was represented with a single species in the study area. Albeit the previous studies, P. paucibranchiata was observed most abundantly in the sampling station having low organic matter amounts. The study showed that opportunistic polychaetes observed in Çardak Lagoon mostly preferred organically poor sediments.Öğe First observation of the zebra mussel (Dreissena polymorpha (Pallas, 1771)) on the narrow-clawed crayfish inhabiting in some water sources of Turkey(Ege Üniversitesi, 2018) Berber, Selçuk; Ateş, Abdullah Suat; Acar, SeçilThe zebra mussel, Dreissena polymorpha (Pallas, 1771) is considered as a harmful invasive epibiont species for hydroelectric and nuclear power plants as it reduces or blocks water flow in the plant systems. Although D. polymorpha is reported that it cleans the water, increases water visibility, and filters out pollutants, it has likewise negative impacts on the population and size of some fish and aquatic species. In the present study, zebra mussels were observed for the first time. On the narrow-clawed crayfish living in some water sources in Turkey. Specimens were collected from two natural lakes (Cildir Lake, Egirdir Lake) and five ponds (Altinyazi Dam Lake, Keban Dam Lake, Kucukcekmece Lake, Karpuzlu Dam Lake, Kadikoy Dam Lake) in Turkey. Attachments of the zebra mussel to the different body parts of the narrow-clawed crayfish were documented in the present study. Cochran's Q test results showed that the numbers of mussels clinging to the different parts of the crayfish varied (P=0.000) (P < 0.001). The difference between the holding regions of zebra mussels on crayfish specimens may cause some adverse effects on the host. Particularly the intensive grip on the carapace partially obstruct the movement, feeding, mating, avoiding predators, and shelter. mussel individuals in the pleopodal region may have difficulty holding and transporting eggs. This study is the first report about the occurrence of D. polymorpha on Astacus leptodactylus in Turkish waters.Öğe Occurrence of the Scavenger Crustaceans Natatolana neglecta (Hansen, 1890) (Isopoda: Cirolanidae) and Scopelocheirus hopei (Costa in Hope, 1851) (Amphipoda: Scopelocheiridae) on Bento-pelagic Fish Species in the Turkish Straits System(Inst Zoology, Bas, 2022) Mülayim, Ayşegül; Ateş, Abdullah Suat; Şen, Yusuf; Özekinci, Uğur; Acar, SeçilThe scavenger crustaceans Natatolana neglecta (Hansen, 1890) (Isopoda: Cirolanidae) and Scopelocheirus hopei (Costa in Hope, 1851) (Amphipoda: Scopelocheiridae), along with several other peracarid crustaceans, were recorded on demersal fish species in the Turkish Straits System. Samples were collected on (in) Raja clavata, Chelidonichthys lucerna, Trachurus sp., Scorpaena scrofa, Merluccius sp., Solea solea and Squalus acanthias captured by trammel nets at depth of 50 m on 26(th) January 2021. Natatolana neglecta, Scopelocheirus hopei and Nebalia abyssicola Ledoyer, 1997 are new for the fauna of the Turkish Straits System.Öğe Physical carrying capacity of a potential aquaculture site in the Mediterranean: the case of Sigacik Bay, Turkey(Springer, 2021) Yigit, Murat; Ergün, Sebahattin; Büyükateş, Yeşim; Ateş, Abdullah Suat; Özdilek, Hasan GökselThe aim of the present study was to evaluate physical carrying capacity of a potential cage aquaculture site near a Cittaslow area in the northern part of the Mediterranean (Sigacik Bay, Turkey). Developing tools for timely management of marine aquaculture facilities are important to minimize harmful influences of fish farming. The physical carrying capacity was estimated by mathematical formulations previously developed for the same area, using data of topographical characteristics of the site, production capacities, and leased area information of fish farms in total. Based on the findings of the present study, estimated physical carrying capacity of the potential aquaculture site with a total area of 38.9 ha near the Cittaslow residential area of “Sigacik Bay” was found as 27,694 tons of fish production which is more than 2-fold of the present production level that is around 11,800 tons in the area. Therefore, it might be concluded from a physical point of view that the production level of the present cage farms in Sigacik Bay is below risk levels.Öğe Population structure, growth and reproduction characteristics of the portunid crab, Carcinus aestuarii Nardo, 1847 (Decapoda, Carcinidae) in Çardak Lagoon, Turkish Straits System(Brill, 2020) Acar, Seçil; Ateş, Abdullah SuatThe aim of the present study was to determine the population structure and bioecological characteristics of the portunid crab, Carcinus aestuarii in Cardak Lagoon. In this study, the crabs were sampled by means of fyke-nets at 6 different stations between April 2015 and March 2016. A total of 2458 individuals (686 females, 1755 males, and 17 juveniles) were captured. The average carapace length was measured as 38.85 +/- 0.17 mm in females, and 47.65 +/- 0.16 mm in males. The highest number of specimens was observed in November with 239 individuals, while the lowest number (125 specimens) was observed in February. The reproductive period in both sexes was between November and February and females with eggs were found in November, February and March. An average number of eggs in a female was 61 390 +/- 8.48 and the egg diameter was 345 mu m. The female : male ratio was 0.39 : 1. This paper includes the first published data on population structure, growth, and reproduction characteristics of C. aestuarii in a protected lagoon in the Turkish Straits System.Öğe Presence of microplastics in the stomachs of Carcinus aestuarii Nardo, 1857 in Çardak Lagoon, Çanakkale Strait, Turkey(Cahiers De Biologie Marine, 2018) Acar, Seçil; Ateş, Abdullah SuatThis paper reports the presence of microplastic in the stomachs of the Mediterranean green crab, Carcinus aestuarii Nardo, 1857. The crabs were collected from six sites chosen in the Cardak Lagoon (Canakkale Strait). Plastic fibers were observed in the stomach contents of three male individuals. Since C. aestuarii is an important food for fish and birds in estuarine and lagoon areas, microplastics can go up to the trophic levels by entering the food chain.Öğe Presence of the Mesopodopsis slabberi (Van Beneden, 1861) (Crustacea: Mysida) from the Mediterranean Sea coast of Turkey(Ege Üniversitesi, 2019) Özcan, Tahir; Ateş, Abdullah Suat; Acar, SeçilMysid, Mesopodopsis slabberi (Van Beneden, 1861) was for the first time recorded in Iskenderun Bay (eastern Mediterranean). A total of 10 specimens belong to M. slabberi was collected at the depths between 0 and 2 m. This paper is on the first record of M. slabberi from the Levantine coast of Turkey.Öğe Relationships between environmental variables and abundance of Cnidaria and Echinodermata in Çardak Lagoon, Çanakkale Strait(Ege Üniversitesi, 2023) Acar, Seçil; Ateş, Abdullah Suat; Dağlı, Ertan; Doğan, AlperThis study is on the relationships between the abundances, of cnidarians and echinoderms found in Cardak Lagoon and environmental variables. The benthos samples were collected in three replicates in October 2018, February, April, and June 2019, using a metal framed quadrat system of 100 x 100 cm and 393 cm(3) sediment core by a SCUBA diver. Sediment material was collected at 7 sampling points of Cardak Lagoon in Canakkale Strait. A total of 259 individuals belonging to phylum, Cnidaria and Echinodermata were found in the study area. Cnidarian, Actinia sp. and echinoderm, Asterina gibbosa were the most dominant species. The highest positive correlation value was between Cnidaria species number and organic matter (OM%) content in the sediment. The highest negative correlation value was between Echinodermata species number and NO2+NO3 in lagoon system.Öğe Seasonal Effects of Environmental Variables on Molluscan Communities in cardak Lagoon (Turkish Straits)(Maik Nauka/Interperiodica/Springer, 2023) Ateş, Abdullah Suat; Dogan, A.; Acar, Seçil; Büyükateş, Yeşim; Dağlı, E.; Bakır, A. K.; Mülayim, A.In the present study, the effects of environmental variables on the community of molluscans found in a protected lagoon system (cardak Lagoon, Dardanelles) polluted by domestic waste were investigated. Samplings were performed from sandy and silty bottoms of the study area between the depths of 1 and 1.8 m in October 2018, February, April, and June 2019. A total of 14954 specimens and 59 molluscan species (2 Polyplacophora, 30 bivalves, and 27 gastropods) were found, with two exotic species, Arcuatula senhousia and Ruditape sphilippinarum. Highest gastropod abundance was observed in autumn 2018, while the highest bivalves abundance was in spring 2019. Considering environmental variables, gravel content had highest correlation with Shannon-Weaver and Turkish Biotic Index values. In addition, anionic detergent derived from domestic pollution affected diversity. Environmental variables of anthropogenic origin were found to modify the community structure at high level. Dissolved oxygen, oxygen reduction potential, nitrite + nitrate, and chemical oxygen demand concentrations in water, and sand content in sediment were important variables affecting the distribution of molluscan species in the study area.Öğe Temporal and spatial effects of environmental variables on crustacean communities in Çardak Lagoon (Turkish Straits System) under the influence of domestic pollution(Springer Science and Business Media Deutschland GmbH, 2023) Ateş, Abdullah Suat; Mülayim, Ayşegül; Bakır, Ahmet Kerem; Acar, Seçil; Büyükateş, Yeşim; Dağlı, Ertan; Doğan, Alper; Uzundumlu, Sinan; Kedioğlu, ÇetinThis study presents the temporal and spatial effects of domestic pollution on crustacean assemblages in a protected area, Çardak Lagoon (Turkish Straits System). The samplings were performed from sandy and mud (silt + clay) bottoms between 1 and 1.8 m depths in October 2018, February, April, and June 2019. A total of 6920 specimens and 26 species (1 Isopoda, 1 Tanaidacea, 2 Mysidacea, 3 Cumacea, 5 Decapoda, 14 Amphipoda) belonging to crustaceans was found. Highest crustacea abundances were in autumn and winter. Considering the environmental variables, NO2 + NO3 (mg L− 1) and COD (mg L− 1) levels in the water had the highest correlations with abundance for the sampling periods. According to sampling points, the highest correlation value was found between anionic detergent content in the water and the abundance. Crustacean community structure was modified by environmental variables of anthropogenic origin at a higher level. Oxygen, oxygen reduction potential, NO2 + NO3, total nitrogen, chemical oxygen demand and anionic surfactant levels in water and sediment sand content % were major environmental variables affecting the crustacean abundance in the study area temporally.Öğe Temporal and spatial status of environmental variables and pollutants in Çardak Lagoon (Çanakkale Strait)(Nuray ERKAN A–ZDEN, 2025) Ateş, Abdullah Suat; Büyükateş, Yeşim; Acar, SecilThe objective of this study was to analyse the correlation between domestic pollutants, specifically organic matter, anionic detergent, and suspended solids, and environmental variables such as temperature, salinity, and sediment grain size in Çardak Lagoon on a seasonal basis. Samples were obtained using 5 L Nansen bottles at a depth of 1 m from the surface waters across 6 stations within the lagoon, as well as from 1 station situated on the seaward side. The collection period for the latter was from October 28, 2018, to June 28, 2019. The study demonstrated that the primary indicators of water pollution, namely NH+4 and anionic detergents, were consistently found at very low levels throughout the year in the study area. © 2025 The Author(s).Öğe The first record of Mytilus galloprovincialis (Lamarck, 1819) on Carcinus aestuarii Nardo, 1847 in the Çardak Lagoon, Turkey(Walter De Gruyter Gmbh, 2016) Acar, Seçil; Ateş, Abdullah SuatThis study deals with the presence of Mytilus galloprovincialis on the Mediterranean green crab, Carcinus aestuarii Nardo, 1847 as an epibiont. Crab samples were collected by means of single-entry fyke nets at 6 different locations selected in the Çardak Lagoon. A total of 22 specimens of M. galloprovincialis (1-9 ind. per crab) on different body parts of 4 crabs were recorded. This is the first report about the occurrence of M. galloprovincialis on C. aestuarii.Öğe The occurrence of the Mediterranean soft coral Maasella edwardsi (Cnidaria, Anthozoa, Alcyonacea) in the Aegean Sea coasts of Turkey(Cambridge University Press, 2015) Özalp, Hasan Barış; Ateş, Abdullah SuatThe Mediterranean endemic coral Maasella edwardsi (de Lacaze-Duthiers, 1888) is recorded for the first time from the Aegean Sea coasts of Turkey. A dozen colonies of the species were observed on rocks and the rhizomes of Posidonia oceanica meadows during the coral surveys carried out between 2012 and 2014. This record shows the northernmost occurrence of species in terms of geographic distribution in the Turkish coasts. The number of known species for the Anthozoan fauna of Turkey has increased to 76 with this new record.Öğe The Response of Apseudopsis latreillii (Milne-Edwards, 1828) (Crustacea, Tanaidacea) to Environmental Variables in the Dardanelles(Central Fisheries Research Inst, 2014) Ateş, Abdullah Suat; Katagan, Tuncer; Sezgin, Murat; Acar, SeçilThe tanaid, Apseudopsis latreilli (Milne-Edwards, 1828) is a common crustacean species on the soft bottoms of the Mediterranean ecosystems and occurs in both clean and polluted environments. This study was aimed to determine the sensitive state of tanaid, A. latreillii to the environmental variables observed on the soft bottoms of the Dardanelles. A. latreillei abundance at the sites was analysed in comparision with the organic matter content in sediment and the environmental variables in the study area. A total of 1406 specimens of A. latreillii was recorded during the study. The highest dominance value (Di=30.37%) was for Kepez Harbour where the amount of organic matter was 25.50 +/- 12.09% in the sediment. The highest value of dominance according to the sampling seasons was 56.75% for Autumn 2008 (organic matter=21.7 +/- 7.99%). The highest sand rate (99.59%) in the sediment was found at the Eceabat sampling point. The highest positive correlation (r=0.349, P<0.05) was observed between gravel content (%) measured at the sites and total abundance (ind. 0.09 m-2).
