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Development of a Filament on the Lower Lobe of the Caudal Fin of the Lessepsian Migrant Fish Nemipterus randalli (Actinopterygii: Clupeiformes: Nemipteridae)

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Abstract

Unusual development of a filamentous extension of the lower caudal-fin lobe was observed in eight male individuals of the Lessepsian migrant fish species Nemipterus randalli, collected from Gökova Bay, south-eastern Mediterranean Sea. It is suggested that this phenotypic trait is related to the highly successful invasion of this species in the eastern Mediterranean and may be associated with a shift towards either sexual dimorphism or a change in feeding behavior in a new environment.

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Acknowledgements

We thank Taner Özcan and Samir Tagıyev from the Akyaka Fisheries Cooperative who supported us in obtaining samples of Nemipterus randalli. We also thank Nur Filiz, Hakan Ünlü, Dr. Nildeniz Top Karakuş, Uğur Karakuş, Sinem Sultan Gökalp and Dr. Baran Yoğurtçuoğlu for their contributions, and Dr. Subal Kumar Roul, Puri Field Centre of ICAR-Central Marine Fisheries Research Institute, Odisha, India for information on N. japonicus.

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Authors and Affiliations

  1. Faculty of Fisheries, Muğla Sıtkı Koçman University, Muğla, Turkey

    Umut Uyan, Halit Filiz & Ali Serhan Tarkan

  2. Department of Ocean Sciences, Tokyo University of Marine Science and Technology, Tokyo, 108-8477, Japan

    Murat Çelik

  3. Department of Ecology and Vertebrate Zoology, Faculty of Biology and Environmental Protection, University of Łódź, Lodz, Poland

    Ali Serhan Tarkan

  4. Museum and Art Gallery of the Northern Territory, GPO Box 4646, Darwin, NT, 0801, Australia

    Barry C. Russell

  5. School of Environmental and Life Sciences, Charles Darwin University, Casuarina, NT, 0810, Australia

    Barry C. Russell

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  1. Umut Uyan
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  2. Halit Filiz
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  3. Murat Çelik
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  4. Ali Serhan Tarkan
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Correspondence to Ali Serhan Tarkan.

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Uyan, U., Filiz, H., Çelik, M. et al. Development of a Filament on the Lower Lobe of the Caudal Fin of the Lessepsian Migrant Fish Nemipterus randalli (Actinopterygii: Clupeiformes: Nemipteridae). Proc Zool Soc 75, 118–120 (2022). https://doi.org/10.1007/s12595-021-00380-8

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