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Sea lice (Copepoda: Caligidae) of Turkey, with the discovery of Caligus quadratus Shiino, 1954 in the Mediterranean Sea and the re-description of a rare caligid copepod, Caligus scribae Essafi, Cabral & Raibaut, 1984

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Abstract

The current status of the caligid copepods parasitic on marine fishes off Turkey is reviewed and an updated checklist comprising a total of 24 species, belonging to three different genera, Caligus O. F. Müller, 1785, Euryphorus H. Milne Edwards, 1840 and Lepeophtheirus von Nordmann, 1832, is presented together with habitus illustrations and a key to all 24 species. Two of the species of caligids listed herein constitute new records for Turkish waters. The first, Caligus quadratus Shiino, 1954, a well-known species of the genus, was collected from the common dolphin fish, Coryphaena hippurus Linnaeus. The second, Caligus scribae Essafi, Cabral & Raibaut, 1984, a very rare and poorly known member of the genus, was sampled from a new teleost host, the parrot fish, Sparisoma cretense (Linnaeus). Both fish species were caught in north-eastern Mediterranean waters off the Turkish coast. Caligus quadratus is only briefly described based on key diagnostic characters whereas a full re-description is provided for C. scribae, as the only description available for this species is incomplete and lacks detail. Sparisoma cretense is a new host record for C. scribae. In addition, this is the first report of C. quadratus from the Mediterranean.

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Acknowledgements

I am extremely grateful to Professor Geoffrey A. Boxshall (The Natural History Museum, London) for sharing his valuable knowledge, comments, and experience that brings me to a higher academic level. I am also thankful to Dr Seyit Ali Kamanli (Burdur Mehmet Akif Ersoy University, Turkey) for his technical help during Confocal Laser Scanning Microscope (CLSM) examination and Drishti processing and to my PhD student, Yetkin Sakarya (Çukurova University, Turkey), for his technical assistance. In addition, I would like to thank Professor Selma Erat (Head of the Advanced Technologies Research & Application Center (MEITAM) of the University of Mersin, Turkey), and her co-workers from the Mersin University for their administrative and technical support during CLSM.

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This study was funded by the Çukurova University academic research projects unit (Project No. FBA-2017-7490).

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  1. Department of Aquaculture & Fish Diseases, Faculty of Fisheries, Cukurova University, 01330, Sarıçam, Adana, Turkey

    Argun Akif Özak

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All procedures performed in studies involving animals were in accordance with the ethical standards of the University of Çukurova in Adana, Turkey. All applicable international, national and/or institutional guidelines for the use and care of animals were followed. Fish samples studied in Turkey were maintained according to the guidelines of the animal facility at Faculty of Fisheries of the Çukurova University in Turkey. Specimens of the two caligid copepods re-described herein, were collected from purchased dead fish samples caught by the local fishermen. Previously fixed specimens of the other caligid copepods stored in the collections of the Aquatic Parasitology Museum of the Faculty of Fisheries in Cukurova University (CUMAP) were used for the habitus drawings. Therefore, this study was granted exemption from requiring ethics approval.

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Özak, A.A. Sea lice (Copepoda: Caligidae) of Turkey, with the discovery of Caligus quadratus Shiino, 1954 in the Mediterranean Sea and the re-description of a rare caligid copepod, Caligus scribae Essafi, Cabral & Raibaut, 1984. Syst Parasitol 97, 779–808 (2020). https://doi.org/10.1007/s11230-020-09953-1

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