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...
Influence of Lead on Reproductive Physiology and Gonad and Liver Histology of Female Cyprinus carpio
Cengiz Korkmaz, Özcan Ay, Ahmet Erdem Dönmez, Burcu Demirbağ
Sera 17β-estradiol (E2), 11-ketotestesteron (11-KT) and 17,20-β-dihydroxy-4-pregnen-3-one (17,20βP) levels together with histological changes in liver and gonad tissues were determined after exposing sexually mature female C.carpio to 0.13 and 0.26 mg L− 1 lead for 7, 14 and 21 days. Effects of lead on hepatosomatic - gonadosomatic indices of female fish were also determined after these exposure periods. No statistically significant differences were found between the E2, 11-KT and 17,20βP levels of control and lead exposed fish at the exposure periods tested. GSI values increased after exposure to high levels of Pb for 14 days and HSI values decreased after exposure to high levels of Pb after 7 and 21 days. Histopathological inspection showed dilatation in bile ducts and sinusoids, central...
First Confirmed Stranding of a Juvenile fin Whale, Balaenoptera Physalus (Linnaeus, 1758), in the Northeastern Mediterranean Sea
Ayas, Deniz | Çiftçi, Nuray
The body of a 13.5 m long male fin whale calf (Balaenoptera physalus, Linnaeus, 1758) was found stranded in Mersin Bay on 13 May 2021. The aim of this study was to present its external examination. The carcass of the juvenile was brought to Mersin University Marine Life Museum and examined extensively. It was observed that the integrity of the body was preserved, while the skin was disintegrated and had localized lesions. It was seen that a significant part of the soft tissues in the head were damaged and the jawbone and cranium remained attached to the body. A complete fracture of the radius and ulna of the left pectoral fin was observed and blood accumulation was noted in the thoracic part due to 10–20 days of decomposition. The left pectoral fin was attached to the body only by skin. Th...