Occurrence of a Shoal of Bull Ray Aetomylaeus bovinus (Myliobatidae) Around a Sea-Cage Farm in İskenderun Bay (Türkiye, NE Mediterranean Sea)

Year 2022, , 199 - 202, 29.12.2022

Okan Akyol , Halil Şen , Christian Capapé

https://doi.org/10.46384/jmsf.1185563

Abstract

In this study, a shoal of bull rays, Aetomylaeus bovinus (E. Geoffroy Saint-Hilaire, 1817), around a sea-cage fish farm in Iskenderun Bay, Turkey is reported. Such an aggregation is probably due to ontogenetic shift but may also be a factor of reproductive process as some pregnant females were observed. The number of individuals recorded, in all more than 25, shows that the species is still present in the area but needs a conservation plan due to its k-selected life-histories and potential for extinction.

Keywords

Chondrichthyes, Aggregation, Fish farms, Ontogenetic shift, Reproductive process, Management

Thanks

The authors wish to thank Mr Cumali Kurt for his courtesy during interviews, and the use of his photographs allowing us to enlarge and improve the scientific quality of the present article.

İskenderun Körfezi'nde (Türkiye, Kuzey-Doğu Akdeniz) Balık Çiftliği Etrafında Aetomylaeus bovinus (Myliobatidae) Sürüsünün Varlığı

Abstract

Bu makalede Türkiye sularında İskenderun Körfezi'nden bir balık çiftliği çevresinde Aetomylaeus bovinus (E. Geoffroy Saint-Hilaire, 1817) sürüsü rapor edilmektedir. Bu tür bir toplanma muhtemelen ontogenetik yer değiştirmeden kaynaklanmaktadır; ancak aynı zamanda bu sürüde bazı hamile dişilerin ortaya çıkması nedeniyle üreme sürecinden de kaynaklanmaktadır. 25'ten fazla kaydedilen örnek sayısı, türün bölgede hala mevcut olduğunu, ancak k-seçilmiş yaşam öyküleri nedeniyle olası bir yok oluştan korunmak için bir yönetim planına ihtiyaç duyulduğunu göstermektedir.

Keywords

Kıkırdaklı balıklar, Toplanma, Balık çiftlikleri, Ontogenetik değişim, Üreme süreci, Yönetim

References

• Akyol, O., Aydın, I., El Kamel-Moutalibi, O. & Capapé, C. (2017). Bull ray, Aetomylaeus bovinus (Geoffroy Saint-Hilaire, 1817) Myliobatidae) in the Mediterranean Sea and captures of juveniles from Izmir Bay (Aegean Sea, Turkey). Journal of Applied Ichthyology, 33(6): 1200-1203.
• Ali, M. (2018). An updated checklist of the marine fishes from Syria with emphasis on alien species. Mediterranean Marine Science, 19: 388-393.
• Barash, A., Pickholtz, R., Nativ, H., Malamud S., Scheinin, A. & Tchernov, D. (2018). Seasonal arrival and feeding of injured sharks at fish farms in the Eastern Mediterranean. Journal of the Black Sea /Mediterranean Environment, 24(1): 86-90.
• Bariche, M. & Fricke, R. (2020). The marine ichthyofauna of Lebanon: an annotated checklist, history, biogeography, and conservation status. Zootaxa, 4775(1): 1-157.
• Capapé, C. (1977). Etude du régime alimentaire de la Mourine vachette, Pteromylæus bovinus (Geoffroy Saint-Hilaire, 1817), (Pisces, Myliobatidæ) des côtes tunisiennes. Journal du Conseil pour l’Exploration de la Mer, 37(3): 214-220.
• Capapé, C. (1989). Les Sélaciens des côtes méditerranéennes: aspects généraux de leur écologie et exemples de peuplements. Océanis, 15: 309-331.
• Capapé, C. & Quignard, J.P. (1975). Contribution à la systématique et à la biologie de Pteromylæus bovinus (Geoffroy Saint-Hilaire, 1817), (Pisces, Myliobatidæ) des côtes tunisiennes. Bulletin du Muséum d’Histoire naturelle de Paris, 3ème série, n° 338, Zoologie, 240: 1329-1347.
• Dulcic, J., Lipej L., Orlando-Bonaca M., Jenkos R., Grebc B., Guélorget O. & Capapé C. (2008). The Bull Ray, Pteromylaeus bovinus (Myliobatidae), in the northern Adriatic. Cybium, 32(2): 119-123.
• El Kamel., O., Mnasri, N., Ben Souissi, J., Boumaïza, M., Ben Amor, M.M. & Capapé, C. (2009). Inventory of elasmobranch species caught in the Lagoon of Bizerte (north-eastern Tunisia, central Mediterranean). Pan-American Journal of Aquatic Sciences, 4(4): 383-412.
• El Kamel, O., Mnasri, N., Boumaïza, M., Ben Amor, M.M., Reynaud, C. & Capapé, C. (2010). Additional records of the bull ray Pteromylaeus bovinus (Chondrichtyes: Myliobatidae), in the Lagoon of Bizerte (northern Tunisia, central Mediterranean). Annales, Series Historia Naturalis, 20(2): 169-174.
• El Sayed, H., Akel K. & Karachle, P. (2017). The Marine Ichthyofauna of Egypt. Egyptian Journal of Aquatic Biology and Fisheries, 21(3): 81-116.
• Golani, D. (1996). The marine ichthyofauna of the eastern Levant – history, inventory and characterization. Israel Journal of Zoology, 42: 15-55.
• Golani, D., Öztürk, B. & Başusta, N. (2006). Fishes of the eastern Mediterranean. Turkish Marine Research Foundation, Publication no. 24, Istanbul, 259 pp.
• Mc Auley, R.B., Simpfendorfer, C.A., Hyndes, G.A. & Lenanton, R.C.J. (2007). Distribution and reproductive biology of the sandbar shark, Carcharhinus plumbeus (Nardo), in Western Australian waters. Marine and Freshwater Research, 58: 116-126.
• Mc Eachran, J.D. & Capapé, C. (1984). Myliobatidae. p. 205-207. In P.J.P. Whitehead, M.L. Bauchot, J.C. Hureau, J. Nielsen & E. Tortonese (eds.). Fishes of the North Eastern Atlantic and the Mediterranean. Volume 1. UNESCO, Paris.
• Wintner, S.P. (2006). Pteromylaeus bovinus. The IUCN Red List of Threatened Species 2006: e.T60127A12309591. Zaouali, J. (1979). Étude écologique du lac de Bizerte. Bulletin de l’Office national des Pêches de Tunisie, 3(2): 107-142.
• Zogaris, S. & Dussling U. (2010). On the occurrence of the Bull Ray Pteromylaeus bovinus (Chondrichthyes: Myliobatidae) in the Amvrakikos Gulf, Greece. Mediterranean Marine Science, 11(1): 177-185.