SIGHTINGS OF SMALL DELPHINIDS IN THE SOUTHERN ÇANDARLI BAY (AEGEAN SEA) BETWEEN 2015 AND 2018

Sightings of small delphinids in the southern Çandarlı Bay (Aegean Sea) between 2015 and 2018

Vahit Alan, Gökhan Kaboğlu, Barış Akçalı, Fethi Bengil, Bahar Ubay, Harun Güçlüsoy

Institute of Marine Sciences and Technology, Dokuz Eylül University, Haydar Aliyev Bul. No: 32 35340 İnciraltı, İzmir, TURKEY
Akdeniz Koruma Derneği (Mediterranean Conservation Society), Doğa Park Villaları No: 16 Kalabak, Urla, İzmir, TURKEY
Marine School, Earth System Science Research Center, Girne American University, Girne, TRNC, via TURKEY
STAR Refinery Siteler Mah. Aygaz Cad. No: 21/1 35800 Aliağa, İzmir, TURKEY

Abstract

This study was performed in the southern part of Çandarlı Bay between May 2015 and May 2018. The aim of the research was to determine the existing cetacean species and their distribution. Cetacean monitoring surveys were conducted biannually for three years, and the presence of bottlenose dolphin Tursiops truncatus and common dolphin Delphinus delphis were detected by visual observations. Total encounter rate of delphinids in the study was 1.7567 sightings per 100 km. The main reason for such a low encounter rate is considered as that the study area is in an industrial zone.

Keywords: Cetacean, monitoring, encounter rate, bottlenose dolphin, common dolphin

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References

Alan, V., Bengil, F., Kaboğlu, G., Güçlüsoy, H. (2014) Preliminary results on the status of bottlenose dolphin (Tursiops truncatus Montagu, 1821) in the Izmir Bay, Turkey. International Congress “Estuaries & Coastal Protected Areas“ ECPA
2014, 4-6 November 2014, İzmir, Turkey, pp. 251.

Alan, V. (2015) An investigation populations of cetacean species in the İzmir Bay. Master thesis. Dokuz Eylül University, İzmir (in Turkish).

Bearzi, G. (2012) Delphinus delphis. The IUCN Red List of Threatened Species 2012: e.T6336A16236707 (accessed 30 Jun. 2016).

Buckland, S.T., Anderson, D.R., Burnham, K.P., Laake, J.L. (1993) Distance Sampling: Estimating Abundance of Biological Populations. Chapman & Hall.

Enül, E., Bizsel, K.C., Güçlüsoy, H. (2009) Interaction between trawlers and cetaceans in Izmir Bay: Preliminary findings. 23rd Annual Conference of the European Cetacean Society. Abstract Book. 2-4 March 2009, İstanbul, Turkey,
pp. 87-88.

Eroğlu, İ., Bozyiğit R. (2013) The port of Aliağa. Marmara Coğrafya Dergisi 28: 81-116 (in Turkish).

Güçlüsoy, H., Cirik, S. (2007) Marine mammal strandings on the Turkish Aegean Sea coasts: fisherman reports. Rapp Comm int Mer Medit 38: 492.

Güçlüsoy, H., Karauz, E.S., Kıraç, C.O., Bilenecoğlu, M. (2014) Checklist of marine tetrapods (reptiles, seabirds, and mammals) of Turkey. Turkish Journal of Zoology 38(6): 930-938.

Güçlüsoy, H., Veryeri, N., Cirik, Ş. (2004) Cetacean strandings along the coast of İzmir Bay, Turkey. Zoology in the Middle East 33: 163-168.

Güçlüsoy, H., Veryeri, N., Cirik, Ş. (2005) The status of cetaceans in the İzmir Bay: preliminary results. In: E. Özhan (ed.), Proceedings of the Seventh International Conference on the Mediterranean Coastal Environment MEDCOAST’05. 25-29 October Kuşadası, Turkey, pp. 377-385.

Jefferson, T.A., Leatherwood, S. (1997) Distribution and abundance of IndoPacific hump-backed dolphins (Sousa chinensis Osbeck. 1765) in Hong Kong waters. Asian Marine Biology 14: 93-110.

Küçüksezgin, F., Pazi, I., Gönül, L.T. (2012) Marine organic pollutants of the Eastern Aegean: Aliphatic and polycyclic aromatic hydrocarbons in Candarli Gulf surficial sediments. Marine Pollution Bulletin 64(11): 2569-2575.

Muzyed, S.K., Küçüksezgin, F., Tüzmen, N. (2017) Persistent organochlorine residues in fish and sediments collected from Eastern Aegean coast: Levels, occurrence and ecological risk. Marine Pollution Bulletin 119(2): 247-252.

Notarbartolo di Sciara, G., Birkun, A., Jr. (2010) Conserving Whales, Dolphins and Porpoises in the Mediterranean and Black Seas: an ACCOBAMS Status Report, 2010. ACCOBAMS, Monaco, 212 pp.

Öztürk, B., Öztürk, A.A. (1998) Cetacean strandings in the Aegean and Mediterranean coasts of Turkey. Rapp Comm int Mer Medit 35: 476-477.

Pazı, İ. (2011) Assessment of heavy metal contamination in Candarli Gulf sediment, Eastern Aegean Sea. Environmental Monitoring and Assessment 174 (1-4): 199-208.

Pazı, İ., Gönül, L.T., Küçüksezgin, F., Avaz, G., Tolun, L., Ünlüoğlu, A., Karaaslan, Y., Güçver, MS., Koç-Orhon A., Siltu, E., Ölmez, G. (2017) Potential risk assessment of metals in edible fish species for human consumption from the
Eastern Aegean Sea. Marine Pollution Bulletin 120(1-2): 409-413.

Pirotta, E., Merchant, N.D., Thompson, P.M., Barton, T.R., Lusseau, D. (2015) Quantifying the effect of boat disturbance on bottlenose dolphin foraging activity. Biological Conservation 181: 82-89.

Tonay, A.M., Dede A., Amaha Öztürk, A. (2015). Cetacean in the Aegean Sea. In: The Aegean Sea Marine Biodiversity, Fisheries, Conservation and Governance. (eds., Katağan T., Tokaç, A., Beşiktepe, Ş., Öztürk, B.): Turkish Marine Research Foundation (TUDAV), Publication No: 41, Istanbul, TURKEY, pp. 599-611.

Tyack, P.L. (2008) Implications for marine mammals of large-scale changes in the marine acoustic environment. Journal of Mammalogy 89(3): 549-558.