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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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Natural and Engineering Sciences5
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Acta Natura et Scientia4
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Thalassas: An International Journal of Marine Sciences2
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Advanced Underwater Sciences,1
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Aquatic Science and Technology1
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Asian Journal of Biology1
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BIOLOGICAL TRACE ELEMENT RESEARCH1
The effects of age and individual size on the Fatty Acids and Elemental Composition of Nemipterus randalli Russell, 1986 from Mersin Bay, Turkey
ÖZER, Selmin, AYAS, Deniz
In this study, the effects of the age and individual size on total lipid content, fatty acids and elemental composition of Nemipterus randalli caught from the Mersin Bay were determined. The lipid content of all age groups was found at similar levels. However, the highest lipid level was determined in the 3+ age group (2.85%) while the lowest level was found in the 2+ age group (2.75%). Dominant fatty acids for each age group of N. randalli are palmitic acid (C16:0), stearic acid (C18:0), vaccenic acid (C18:1n7c), cetoleic acid (C22:1n11), eicosapentaenoic acid (EPA, C20:5n3), and docosahexaenoic acid (DHA, C22:6n3). The highest palmitic acid level was found in 3+ age group (20.45%) whereas the highest stearic acid level was found in the 2+ age group (15.00%). The highest vaccenic acid lev...
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...
New Record of the Velvet Belly Lanternshark Etmopterus spinax (Linnaeus, 1758) in the Deep Seas of Northern Cyprus
AYAS, Deniz | Çiftçi, Nuray
Lantern sharks are small shark species that can be seen at depths between 70 and 2000 meters. Due to their luminescent characteristics, they have been called “Lantern shark”. In total eleven specimens of the velvet belly lantern shark, Etmopterus spinax (Linnaeus, 1758), were caught in the deep seas of Northern Cyprus by using a bottom trawl. Sampling was carried out using 13 trawling operations. The collected samples were placed in 4% formalin and stored at the Museum of the Systematic, Faculty of Fisheries, Mersin University, (catalogue number: MEUFC-18-11-082). As a sampling area, the depths between 274 and 641 m were selected. Other cartilaginous fish caught during sampling except E. spinax were Galeus melastomus (1 individual), Squalus acanthias (4 individuals), Scyliorhinus ca...
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.
Additional record of Trypauchen vagina (Bloch & Schneider, 1801) from Mersin Bay, Turkey.
Çiftçi, Nuray | Ayas, Deniz
Two mature individuals of Trypauchen vagina were caught by trawl fishing at 30 m depth in the Mersin coastal areas in September 2018. Meristic and morphometric measurements of the individuals were done and compared with its measurements reported in other studies. In previous studies; one record from Mersin Bay and in totally three records of T. vagina in the Northeastern Mediterranean Sea were reported. In this study, the second record of T. vagina was reported from Mersin Bay.
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 the lesser spotted dogfish (Scyliorhinus caniculaLinnaeus 1758) in the international waters of Mersin Bay, Turkey
Ayas, Deniz | Çiftçi, Nuray
Eighty-five specimens of the lesser spotted dogfish, Scyliorhinus canicula Linnaeus, 1758, was caught by a bottom trawl in the international waters of the Mersin Bay in May 2018. Some of the caught individuals were preserved in 4% formalin and was deposited in the Museum of the Systematic, Faculty of Fisheries, Mersin University, (catalogue number: MEUFC-18-11-079). The depth of sampling area is between 274 and 641 m. A total of 13 trawling operations were carried out. The total number of caught individuals was 85 and on average 5 individuals were caught in each operation. The other cartilaginous fishes caught apart from S. canicula were Galeus melastomus (1 individual), Squalus acanthias (4 individuals), Etmopterus spinax (11 individuals) and S. canicula made up 84.16% of all cart...
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...
The New Locality Record of Centrolophus niger (Gmelin, 1789), from Büyükeceli Coast (North-Eastern Mediterranean Sea)
Ayas, Deniz | Çiftçi, Nuray
A female rudderfish, Centrolophus niger (Gmelin, 1789) was caught by a trawler boat at a depth of 400 m on the shores of the Büyükeceli (Northeastern Mediterranean Sea). Its total length was 51.9 cm. This paper reports the fifth location along the Mediterranean and Aegean Sea coast of Turkey and the presence of the species in the Büyükeceli coast from the Mediterranean coast of Turkey.
Determination of Fish Diversity in The Rocky Habitat Around Mersin Boğsak Island (Northeast Mediterranean) by Visual Census Method
ATEŞ, Mert | ÇİFTÇİ, Nuray | AYAS, Deniz
The study was carried out in the rocky bottom habitat of Boğsak Island in Mersin Bay in November, March and July 2022-2023, using visual census method between 0-18 m depth and the survey was conducted along a transect. In the study, the structure of the fish community of the rocky bottom habitat of Boğsak Island was determined and the seasonal availability, abundance, feeding status and distribution of native and non-native fish species were determined. Shannon-Weiner Diversity Index (H') was used to determine species diversity and multidimensional scaling analysis was used to determine the relationship between the data. A total of 29 fish species, including 28 bony fish species belonging to 15 families and 1 cartilaginous Gymnura altavela (Linnaeus, 1758) were identified in the study a...
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...
Seafood Consumption Preferences of University Student and Factors Affecting Preferences: The Case of Mersin University
Alageyik, Musavver | Çiftçi, Nuray | Ayas, Deniz
The aim of this study was to determine the preferences of students attending Mersin University's Çiftlikköy and Yenişehir campuses for seafood consumption preference and to what extent these preferences are related to demographic characteristics such as gender, age, income level and type of program they study. Data were obtained by random sampling method in April, May and June of 2018 on a questionnaire form based on face-to-face interviews with 550 students from different programs. Of the 550 students surveyed, 53.8% were female, 46.2% were male, 70% were between 18-23 years, 23% were between 24-28 years, 4% were 33 and over, 3% were 29-33 age group. 74% of the students participating in the survey are undergraduate, 15% are associate degree, 9% graduate, 2% continue their doctora...
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 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...