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    Bioaccumulation of some heavy metals in different tissues of Dicentrarchus labrax L, 1758, Sparus aurata L, 1758 and Mugil cephalus L, 1758 from the Camlik lagoon of the eastern cost of Mediterranean (Turkey)
    (Springer, 2006) Dural, Meltem; Goksu, M. Z. Lugal; Ozak, Argun Akif; Derici, Baris
    In this study, bioaccumulation of the heavy metals (Fe, Zn, Cd) in the liver, gill, gonad and muscle tissues of Dicentrarchus labrax, Mugil cephalus and Sparus aurata were investigated seasonally. Camlik is the important fisheries lagoon located in The Iskenderun Bay, Mediterranean cost of Turkey. Due to heavy industrial and agricultural activities in the region, the bay has the polluted coastal waters of Turkey. Therefore, the levels of cadmium, zinc, iron were determined in the muscle in each species because of its importance for human consumption and also the liver, gill, gonad were analysed since these organs tend to accumulate metals. Heavy metal levels were found generally higher in the liver and gill than the gonad and muscle tissues in three species; the levels of all metals in a given tissue were generally higher in Mugil cephalus than the other two species. Data collected in this study suggest that Camlik lagoon is affected by a relatively metal pollution. The concentrations of Zn concentrations in the muscle tissues exceeded the acceptable levels for a food source for human consumption and other metals in the edible parts of the investigated fish were in the permissible safety levels for human uses.
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    Investigation of heavy metal levels in economically important fish species captured from the Tuzla lagoon
    (Elsevier Sci Ltd, 2007) Dural, Meltem; Goksu, M. Ziya Lugal; Ozak, Argun Akif
    Two hundred fish samples were collected seasonally from November 2000 to December 2001 from the Tuzla Lagoon. Heavy metal (Cd, Pb, Cu, Zn, and Fe) concentrations were measured in the muscle, gill, liver and gonad of three fish species (Sparus aurata, Dicentrarchus labrax and Mugil cephalus). The concentrations of heavy metals were determined by using flame atomic absorption spectrophotometry (FLAAS) and graphite furnace atomic absorption spectrophotometry (GFAAS) after wet digestion method. Our results indicated that all heavy metals were found the highest in muscle tissue in S. aurata. Although Cd and Zn were found in spring, Fe, Cu, and Pb were observed in winter. In addition, D. labrax and M. cephalus accumulated lowest heavy metals in muscle during this study. While the highest concentrations of Zn, Fe and Cu were measured in the liver of M. cephalus, the highest levels of Cd and Pb were determined in gill tissue of M. cephalus. However, in some seasons Zn, Cd and Pb concentrations in the muscle were higher than the maximum levels set by law. Especially, for each species in spring high levels of Zn were measured, for D. labrax and M. cephalus in spring and for S. aurata in winter high levels of Pb were measured; for S. aurata in spring and for M. cephalus in winter high levels of Cd were measured for human consumption. (c) 2006 Elsevier Ltd. All rights reserved.
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    Lernanthropid copepods parasitic on marine fishes in Turkish waters, including two new records
    (Magnolia Press, 2016) Ozak, Argun Akif; Demirkale, Ibrahim; Yanar, Alper
    A review of Lernanthropidae (Copepoda: Siphonostomatoida) recorded on marine fish species in the Mediterranean and Turkish seas is presented together with the first records of two species of the genus Lernanthropus de Blainville, 1822 that are new to the Turkish coasts. The newly recorded parasites are: Lernanthropus gisleri van Beneden, 1852 from the gill filaments of Umbrina cirrosa (Linnaeus, 1758) and Lernanthropus callionymicola El-Rashidy & Boxshall, 2012 from the gill filaments of the Red Sea immigrant dragonet Callionymus filamentosus Valenciennes, 1837. General morphology, measurements and key diagnostic characters of both species are presented, based on light and scanning electron microscopy. In addition, some contradictions are noted in previous descriptions of L. gisleri and some newly observed structural details of L. callionymicola are also presented.