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.

Mersin sahilinde Dağılımı Bulunan Ulva rigida (C. Agardh 1823)'nın Yağ Asidi Profilinde Bölge Farklılıklarına Bağlı Değişimler

Alp, Mehmet Tahir | Börekçi, Nahit Soner | Ayas, Deniz

Çalışmada kullanılan Ulva rigida örnekleri Mersin sahilinin farklı noktalarından (1. istasyon; Çamlıbel, 2. istasyon; Karaduvar, 3. istasyon; Marina, 4. istasyon; Hilton) 2016 yılında ilkbahar mevsiminde toplanmıştır. U. rigida’nın toplam yağ ve yağ asidi düzeyleri belirlenmiştir. Toplam yağ düzeyi için sırasıyla 1. istasyon %0.87, 2. istasyon %1.03, 3. istasyon %0.41, 4. istasyon %4.99 olarak bulunmuştur. Dominant doymuş yağ asitleri (SFA) palmitik asit ve stearik asittir. Palmitik asidin en yüksek düzeyi 4. istasyon örneklerinde %40.64, en düşük düzeyi ise 1. istasyon örneklerinde %27.78 olarak bulunmuştur. Stearik asidin en yüksek düzeyi 4. istasyon örneklerinde %12.49, en düşük düzeyi 2. istasyon örneklerinde %2.71 olarak bulunmuştur. ΣSFA düzeyi istasyonlarda sırası ile %36.47, %41.32...

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...

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...

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.

Mersin Körfezi'nden avlanan Callinectes sapidus, Portunus pelagicus ve Sepia officinalis türlerinin besin kompozisyonu ve ısıl işlem uygulanmış yengeç etinin 4 C'de depolanması sırasındaki duyusal ve kimyasal değişimler

Ayas, Deniz

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 ...

Seyhan Baraj Gölü sazan (Cyprinus carpio)'larının mevsimsel besin kompozisyonu ile sıcak tütsüleme sonrası kimyasal duyusal ve mikrobiyolojik değişmeleri

Ayas, Deniz

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...

Biometric Features of marbled spinefoot Siganus rivulatus (Forsskål & Niebuhr, 1775) from Mersin Bay (Northeastern Mediterranean), Turkey.

Çiftçi, Nuray | Ayas, Deniz

In the study, it was aimed to determine the morphometric measurements of Siganus rivulatus (Forsskål & Niebuhr, 1775) sampled from Mersin Bay in February 2021. The average value of some morphometric measurements of fish from Mersin Bay (n=196) were found that the total length 17.87 ± 3.11 cm, standard length 13.88 ± 1.96 cm, fork length 17.06 ± 1.35 cm, head length 3.60 ± 0.76 cm, eye diameter 1.08 ± 0.23 cm, interorbital distance 1.60 ± 0.34 cm, body width 2.32 ± 0.48 cm, dorsal fin base length 10.45 ± 2.19 cm, anal fin base length 6.26 ± 1.31 cm, pectoral fin length 2.56 ± 0.53 cm and caudal peduncle height 0.78 ± 0.16 cm. The total length-weight relationship of the species was determined as W = 0.008xTL3.16 (r2=0.973) and it was found that the fish showed positive allometric grow...

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...