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Natural and Engineering Sciences7
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Advanced Underwater Sciences5
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Marine Science and Technology Bulletin5
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Mediterranean Fisheries and Aquaculture Research5
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Acta Natura et Scientia4
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Fresenius Environmental Bulletin4
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Journal of Animal and Veterinary Advances3
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Süleyman Demirel Üniversitesi Eğirdir Su Ürünleri Fakültesi Dergisi2
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Thalassas: An International Journal of Marine Sciences2
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Aquaculture Studies1
Effects of Chromium on the Hematocrit Levels and Erythrocyte Numbers of Cyprinus carpio
Cicik, Bedii | Çiftçi, Nuray | Ay, Özcan
Changes in hematocrit levels and erythrocyte numbers of Cyprinus carpio were determined after exposing the animals to 0.5, 1.0 and 2.0 ppm chromium over 7, 15 and 30 days. Microhematocrit and hemocytometric methods were used for determining hematocrit levels and erythrocyte numbers respectively. No mortality was observed during the experiments. Hematocrit levels and erythrocyt numbers increased under the effect of metal on day 15. Hematocrit levels and erythtrocyte numbers decreased by increasing exposure periods except at 0.5 ppm chromium.
Metal(loid) accumulation and ecotoxicological assessment in cartilaginous fishes from the Northeastern Mediterranean
Çiftçi, Nuray | AYAS, Deniz
The present study was conducted with the objective of ascertaining the levels of selected metal(loid)s in the muscle, liver, spleen, kidney, stomach, intestinal, and gonad tissues of seven distinct cartilaginous species sampled from Northern Cyprus. This initiative was undertaken to address the dearth of metal bioaccumulation data for cartilaginous species and to elucidate the impact of metal pollution on these species, which are distinguished by their limited reproductive capacity. The samples were obtained from discarded species captured during commercial fishing activities. The metal concentrations in these tissues were subsequently determined using Inductively Coupled Plasma Mass Spectrophotometry (ICP-MS). The results indicated that the kidney tissue of Squalus blainville exhibited th...
Cranial Morphometrics of a Stranded Common Bottlenose Dolphin Tursiops truncatus (Montagu, 1821) in Mersin Bay (Northeastern Mediterranean, Turkey)
AYAS, Deniz | Çiftçi, Nuray
On 10 November 2017, a young male common bottlenose dolphin Tursiops truncatus (Montagu, 1821), 185 cm in total length (TL), was found dead on the Mersin Marina (36°46'065"N, 34°34'212"E) in Northeastern Mediterranean coast of Turkey. Measurements of the sample performed and documented. The specimen buried to obtain the skeleton of the individual. At the end of this process, the sample was deposited in the Museum of the Systematic, Faculty of Fisheries, Mersin University, (Catalogue no: MEUMC-17- 11-001). The morphometric measurements can contribute to ongoing fisheries biology and taxonomic studies of T. truncatus from Mediterranean Sea waters. During routine fishing activities, common bottlenose dolphins can be caught in fishing nets and drowned. This issue leads to an extra pop...
First Record of the Pempheris rhomboidea (Kossmann Räuber, 1877) from Mersin Bay, Northeastern Mediterranean Sea
Çiftçi, Nuray | Ayas, Deniz
In this study, eight individuals of Pempheris rhomboidea (Kossmann & Räuber, 1877) were for the first time caught in the Mersin Bay, Northeastern Mediterranean Sea. Some morphometric and meristic characters of these individuals were measured. The average standard length (SL): 90.13 mm, total length (TL): 112.62 mm, the length of longest pectoral fin (LPF): 25.88 mm, the length of longest dorsal fin ray (LDF): 21.25 mm, SL/LPF: 3.88, SL/LDF: 4.24, A: III, 39-42; D: VI, 9; LL pore scales: 55-58. The ratio of eye diameter (ED) to standard length (SL) is 7.95. The presence of the non-indigenous Pempheris rhomboidea was reported for the first time from Northeastern Mediterranean Sea and second time fromTurkish marine waters.
First Report on the Elemental Composition of the Bigeye Thresher Shark Alopias superciliosus Lowe, 1841 from the Mediterranean Sea
Çiftçi, Nuray | Cicik, Bedii | Ayas, Deniz
Cartilaginous fish species have ecological importance. Besides, the ecotoxicological studies on these species are pretty insufficient. In this study, Al, Cr, Mn, Fe, Cu, Zn, As, Pb, Cd, and Sr levels were determined in muscle, liver, gill, kidney, spleen, stomach, and gonad tissues of Alopias superciliosus (Female, 240 cm TL) caught from Mersin Bay. Tissue metal analysis was determined by Inductively Coupled Plasma Mass Spectrometry (ICP-MS). A statistical difference was found among the tissues in terms of the metals. Fe was determined to be the highest level in all tissues (pGill>Spleen>Gonad>Kidney>Stomach>Muscle. Zn was detected at higher levels in the liver and stomach and As in other tissues after Fe. Al has the highest level after Zn and As and was mainly found in the gills. ...
Occurrence of Bluntnose Sixgill Shark Hexanchus griseus (Bonnaterre, 1788) in Yeşilovacık Bay, Northeastern Mediterranean
Ayas, Deniz | Çiftçi, Nuray
Aims: In this study, an individual of H. griseus was caught from the Mersin Bay and this ichthyologic note presents a new female record of H. griseus for Mersin Bay, Mediterranean coast of Turkey. This study aims to contribute to the chronological records of the species in the Mediterranean Sea. Place and Duration of Study: Yeşilovacık bay is a small bay in the west of Mersin Bay. Yeşilovacık bay which lies at approximately 36°07’n latitude, 33°37’e, longitude and about 143 km Western of in Mersin province, Turkey. Sample: On 19 March 2018 blunthose sixgill shark specimen was measured and then deposited in the Museum of the Systematic, Faculty of Fisheries, University of Mersin. Methodology: A female specimen of H. griseus with a total length (TL) of 350 cm (400 kg) was captured b...
Some deep-sea decapod crustaceans from the international waters of Mersin Bay(North Levant Basin, Turkey)
AYAS, Deniz | Çiftçi, Nuray
The deep-see decapod crustacean species sampled from trawling operations carried out in the open waters of Mersin Bay (Coordinates: 36.24853N-34.36491E, 36.18839N-43.38847E, 36.17065N-34.40686E, and 36.07227N34.53326E) in May 2018 were identified. Samples were preserved in ethyl alcohol and were deposited in the Museum of the Systematic, Faculty of Fisheries, Mersin University, (catalogue number: MEUDC-17-11-001, MEUDC-18-12- 010-014). In total 13 trawling operations, 6 deep-sea decapod crustacean species were caught. Plesionika edwardsii belonging to family of Pandalidae, Polycheles typhlops belonging to Polychelidae family, Geryon longipes from Geryonidae family, Medorippe lanata from Dorippidae family, Pasiphaea sivado from Pasiphaeidae family and Parapenaeus longirostris from Pen...
Report of Stranding of Striped Dolphin Stenella coeruleoalba (Meyen, 1833) in Mersin Bay (Northeastern Mediterranean Sea, Turkey)
AYAS, Deniz | Çiftçi, Nuray
On 08 April 2019, a mature female striped dolphin Stenella coeruleoalba (Meyen, 1833), 185 cm in length (TL), was found dead across the shores of the Mersin Naval Museum, Mersin on the northeastern Mediterranean coast of Turkey. Striped dolphins may accidentally enter the fishing nets, which may be one of the reasons for their death. Although this species has been classified as Vulnerable in the IUCN list, considering the frequency of deaths among this species, the necessity to develop species conservation strategies for the Mediterranean was once again proven by the death of this individual.
First record of the big nose shark, Carcharhinus altimus (Springer, 1950) from Mersin Bay
Ayas, Deniz | Çiftçi, Nuray | Yalçın, Esin
The total length of this shark specimen, which caught from a depth of 25 m, is 65.2 cm, and its weight is 2.2 kg. In this study, juvenile C. altimus species are more likely to be born in the Levant basin than the immigration. Their parents are highly likely to be found in the deep waters of the northeastern Mediterranean. This finding may indicate that this circumglobal species may also spread in the Northeast Mediterranean. Thus, continuous studies are needed in this region for further investigation and monitoring of these species. This research will make a significant contribution to many researchers working in this field in the future.
The Confirmed Stranding of an Adult Female Risso's Dolphin, Grampus griseus (G. Cuvier, 1812), in the northeastern Mediterranean Sea.
Ayas, Deniz | Çiftçi, Nuray | Tanış, Yekta
The study aimed to report a confirmed stranding record of an adult female Risso’s dolphin (Grampus griseus) from the northeastern Mediterranean Sea. This species is classified as "Least Concern" in the Mediterranean by the International Union for Conservation of Nature (IUCN). The individual, which was first seen alive from the Erdemli shores of Mersin Bay on 10 April 2023, was tried to push back into the water after being stranded ashore. After the individual died, the corpse was brought to Mersin University Marine Life Museum for external examination. It was determined that the individual weighed 360 kg and had a length of 330 cm. Many old and new scars were found on the individual's skin. It was understood that the newly formed deep cut marks on the head area were caused by the ...
The Comparison of Heavy Metal Level in Surface Water, Sediment and Biota Sampled from the Polluted and Unpolluted Sites in the Northeastern Mediterranean Sea
Çiftçi, Nuray | AYAS, Deniz
The determination of heavy metal level (aluminium, iron, zinc, arsenic strontium) in surface water, sediment, and biota in Iskenderun Bay, polluted site, and Mersin Bay, unpolluted site, in 2018–2019 seasonally were aimed. The muscle and liver (viscera for shrimp) tissue of three fish (Saurida lessepsianus, Nemipterus randalli, Mullus barbatus) and an invertebrate (Penaus semisulcatus) species, which have different habitats and diet, were used to detection of biota metal level. Sediment samples were analyzed in four different particle sizes which were < 63, 63 ≤ − < 125, 125 ≤ − < 250, 250 ≤ − < 500 μm mesh size. The metal levels in surface water, sediment, and biota samples were analysed with Inductively Coupled Plasma-Mass Spectrometer (ICP-MS). Statistical analysis of the data was...
Morphometric comparison of different populations of Nemipterus Randalli Russell 1986 distributed in the Mediterranean coasts of Turkey: Nemipterus randalli'nin Morfometrisi
Ay, İrfan | Çiftçi, Nuray | Ayas, Deniz
It was aimed to compare the populations of N. randalli sampled from Antalya, Anamur, Silifke, Mersin, and Iskenderun by the biometric method. BioMorph program was used in the research. Principal Components Analysis (PCA), Intercluster Correlation Analysis (ICA), and Univariate Analysis of Variance (UAV) were used in the multivariate analyzes of the individuals. The comparison of the data was made with SPSS and Excel package programs. A statistical difference was found between the populations in terms of morphometric characteristics (p
First record of Tetragonurus cuvieri Risso, 1810 (Tetragonuridae) from the Eastern Mediterranean.
Ayas, Deniz | Çiftçi, Nuray
A single specimen of the smalleye squaretail, Tetragonurus cuvieri Risso, 1810, (39.2 cm in total length) was caught with a commercial trammel net at a depth of 550 m in January 2022 from Mersin Bay (NE Mediterranean, Turkey). This is the first record of T. cuvieri in the Northeastern Mediterranean, Turkey. Morphological measurements of the specimen were made and recorded with the catalog number (MEUFC-22-11-134) in the Museum of Marine Life, Mersin University.
Some Brachyuran Crab Records from Coastal Waters of the Mersin Bay, Turkey (Northeastern Mediterranean Sea)
Ayas, Deniz | Çiftçi, Nuray
Eight crab species (Eriphia verrucosa, Maja squinado, Calappa granulata, Charybdis (Goniohellenus) longicollis, Callinectes sapidus, Atergatis roseus, Portunus segnis, Maja crispata) were sampled from Mersin Bay (Northeastern Mediterranean) between September 2017 and April 2018. Three species belong to the family of Portunidae while two Maja species represent Majidae. The other crabs represent the families of Calappidae, Xanthidae, and Eriphidae. All specimens were preserved in ethanol and were deposited in the Museum of the Systematic, Faculty of Fisheries, Mersin University (catalogue number:MEUDC-17-12-002 - MEUDC-18-12-009). Previous records of these crabs in the Mediterranean Sea were determined as their distributions were compared. All crab samples in the study are distribute...
Potential Usage of Pufferfish Dentin as a Metal Accumulation Indicator
Çiftçi, Nuray | Ayas, Deniz
The pufferfish are non-indigenous species in the Mediterranean Sea that do not have predators in the food chain. Therefore, the determination of heavy metal accumulation in pufferfish species can be considered as natural chelation for the aquatic environment. The present study, the potential usage of dentin tissue as an indicator of heavy metal bioaccumulation was examined in pufferfish species. The accumulation of Co, Cu, Zn, Fe, Mo, Ni, Se, Al, Cd, Pb, As, Cr in dentin, liver, kidney and muscle tissues of four pufferfish species (Lagocephalus sceleratus, Lagocephalus spadiceus, Lagocephalus suezensis, and Torquigener flavimaculosus) were captured in the Göksu River and Yeşjlovacık coasts of Turkey by a commercial trawler. The different bioaccumulation levels were found in each species...
First record of Pempheris rhomboidea (Kossmann & Räuber, 1877) harvested from aquaculture fish cages
Çiftçi, Nuray | Ayas, Deniz
An individual of Pempheris rhomboidea species was detected in a cage where sea bream was grown in the Mersin Dana Island region. P. rhomboidea is a species of the Pempheridae family distributed in the Indo-Pacific and West Atlantic and is a nocturnal species that inhabit coral reefs and rocky waters. It is known that different wild fish species enter into the aquaculture fish cages where marine fish are grown and grow together with the aquaculture species. There is no previous record of this species obtained from aquaculture cages. The total length and weight of the individual in the cage were 12.6 cm and 23.938 g. Considering the mesh size of the cage, it is estimated that this individual entered the cage in the juvenile period. At the end of the 11-month aquaculture period, it wa...