Linear Transect Surveys of Abundance and Density of Cetaceans in The Area Near the Dzharylgach Island in the North-Western Black Sea

E. V. Gladilina 1 , 2 , K. A. Vishnyakova 1 , O. O. Neprokin 3 , Yu. F. Ivanchikova 4 , T. A. Derkacheva 5 , A. A. Kryukova 6 , O. V. Savenko 1 ,  and P. E. Gol’din 2 , 3
  • 1 Ukrainian Scientifi c Centre of Ecology of the Sea, Frantsuzsky Blvrd., 89, , Odesa, Ukraine
  • 2 Schmalhausen Institute of Zoology, NAS of Ukraine, vul. B. Khmelnytskogo, 15, , Kyiv, Ukraine
  • 3 Ukrainian Scientific Centre of Ecology of the Sea, Frantsuzsky Blvrd., 89, , Odesa, Ukraine
  • 4 Kolasa, 11/114, , Kyiv, Ukraine
  • 5 I. I. Mechnikov Odesa National University, Dvoryanska, 2, , Odesa, Ukraine
  • 6 Akademika Glushko Avenue, 11/2, , Odesa, Ukraine

Abstract

The first assessment of cetacean density and abundance by linear transect survey was conducted in 2016 and 2017 in the shallowest coastal area of the Ukrainian sector of the north-western Black Sea, in the Dzharylgach Gulf and the northern Karkinit Gulf, total area up to 259 km2. Three cetacean species were found present in the area in summer, and the harbour porpoise was the most abundant species with the abundance of at least a few hundred animals (estimated as 175 individuals in the Dzharylgach Gulf), whereas the common dolphins (59) and bottlenose dolphins (31) were present in lesser numbers. Common and bottlenose dolphins showed the clearest patterns of habitat preferences, being restricted respectively to the Dzharylgach and the northern Karkinit Gulf; an unusual trait is the preference of the shallowest habitat by common dolphins. Recorded density of harbour porpoises in the Dzharylgach Gulf is among the highest in the whole Black Sea. Thus, the studied area may be an important summer habitat for cetaceans.

If the inline PDF is not rendering correctly, you can download the PDF file here.

  • Biodiversity of the Dzharylgach: Modern State and Ways of Conservation. 2000. Kotenko, T. I, Shelyag-Sosonko, Yu. R., eds. Vestnik Zoologii. Special is., 1-240 [In Russian].

  • Birkun, jr., A. A. 2006. Cetaceans. In: Zaitsev, Y. P., Aleksandrov, B. G., Minicheva, G. G., eds. The North-Western Part of the Black Sea: Biology and Ecology. Naukova Dumka, Kiev, 314-332 [In Russian].

  • Birkun, A. A., Krivokhizhin, S. V., 2003. Results of survey of cetaceans in territorial waters of Ukraine: Assessment of population state of the Red Data Book listed marine mammals of the Sea of Azov and the Black Sea (MS-2003). Report. Brema Lab., Simferopol, pt. 1, 15-24 [In Ukrainian].

  • Birkun, jr., A., Krivokhizhin, S., Komakhidze, A., Mukhametov, L., Shpak, O., Goradze, I., Komakhidze, G. and Kryukova, A. 2006. Wintering concentrations of Black Sea cetaceans off the Crimean and Caucasian coasts. 20th Annual Conference of the European Cetacean Society. (Gdynia, 2-7 April 2006), 1-203 [In Russian].

  • Birkun, jr. A., Northridge, S. P., Willsteed, E. A., James, F. A., Kilgour, C., Lander, M., Fitzgerald, G. D. 2014. Studies for Carrying Out the Common Fisheries Policy: Adverse Fisheries Impacts on Cetacean Populations in the Black Sea. Final report to the European Commission. Brussels, 1-347.

  • Buckland, S. T., 2004. Advanced Distance Sampling: Estimating Abundance of Biological Populations. Oxford University Press, New York, 1-416.

  • Buckland, S. T., Anderson, D. R., Burnham, K. P., Laake, J. L., Borchers, D. L., Thomas, L., 2001. Introduction to Distance Sampling: estimating Abundance of Biological Populations (New edition). OUP Oxford, Oxford; New York, 1-448.

  • Bushuyev, S. G. 2000. Depletion of forage reserve as a factor limiting population size of Black Sea dolphins. In: Ecological Safety of Coastal and Shelf Areas and a Composite Utilization of Shelf Resources. Proceedings Marine Hydrophysical Institute. Sevastopol, 437-452 [In Russian].

  • Caughley, G., 1977. Analysis of vertebrate populations. John Wiley & Sons Ltd., London; New York; Sydney; Toronto, 1-234.

  • Gladilina, E. V., Gol’din, P. E., 2016. Abundance and Summer Distribution of a Local Stock of Black Sea Bottlenose Dolphins, Tursiops truncatus (Cetacea, Delphinidae), in Coastal Waters near Sudak (Ukraine, Crimea). Vestnik Zoologii, 50 (1), 49-56.

  • Krivokhizhin, S. V., Birkun, jr. A. A., Radygin, G. Yu., 2012. Seasonal changes in distribution and abundance of cetaceans near the coast of the south-eastern Crimea. In: Current fisheries and ecological problems of the Azov-Black Sea region, Proc. 7th Int. Conf. YugNIRO. Kerch, Vol. 1, 115-118 [In Russian].

  • Mikhalev, Y.A., 2005. Th e peculiarities of the distribution of the bottlenose dolphin, Tursiops truncatus (Cetacea), in the Black Sea. Vestnik Zoologii, 39 (3), 29-42.

  • Salnikov, N. E. 1967. Cetacea. In: Vinogradov, K. A., ed. Biology of Th e North-Western Part of Th e Black Sea. Naukova Dumka, Kiev, 235-240 [In Russion].

  • Savenko, O., Ivanchikova, J., Gulak, B., Derkacheva, T. 2016. Sightings of cetaceans in the waters of Yuzhny Sea Port (Hryhorivsky Estuary, Black Sea) in 2015-2016. Proceedings of Th eriological School, 14, 134-138.

  • Selyunina, Z. V. 1996. Mammals. Vestnik Zoologii. Special is., 1, 39-44 [In Russian].

  • Selyunina, Z. V. 2001. Dolphins in the areas of the Black Sea Biosphere Reserve. In: Marine mammals in waters of Ukraine. Proc. Workshop. Kyiv, 14-15 [In Ukrainian].

  • Selyunina, Z. V., Tkachenko, P. V., Bakhtiarova, L. I., 2003. Report on records of marine mammals in the Black Sea Biosphere Reserve: Assessment of population state of the Red Data Book listed marine mammals of the Sea of Azov and the Black Sea (MS-2003). Report. Brema Lab., Simferopol, pt. 2, 133-159 [In Russian].

  • Selyunina, Z. V., Tkachenko, P. V., Bakhtiarova, L. I., 2006. Report on records of marine mammals in the Black Sea Biosphere Reserve. In: Improvement of the Ukrainian National Network for Cetaceans Monitoring and Conservation, Annex 8, 1-34 [In Russian].

  • Tarina, N. A., Perzhynsky, V. V., Gamaliy, P. A. 2003. Report on records of marine mammals in the Black Sea Biosphere Reserve: Assessment of population state of the Red Data Book listed marine mammals of the Sea of Azov and the Black Sea (MS-2003). Report. Brema Lab., Simferopol, pt. 2, 163-178 [In Russain].

  • Teilmann, J., Christiansen, C.T., Kjellerup, S., Dietz, R. and Nachman, G., 2013. Geographic, seasonal, and diurnal surface behavior of harbour porpoises. Marine mammal science, 29 (2), E60-E76.

  • Thomas, L., Buckland, S. T., Rexstad, E. A., Laake, J. L., Strindberg, S., Hedley, S. L., Bishop, J. R. B., Marques, T. A., Burnham, K. P., 2010. Distance soft ware: design and analysis of distance sampling surveys for estimating population size. Journal of Applied Ecology, 47, 5-14.

  • Tsemsh, I. O. Excursion to the south of Ukraine in 1937. 1941. Trudy Zoologichnogo Muzeyu Kyivskoho Universytetu, 1, 327-342 [In Ukrainian].

  • Zatevakhin, I. I., 1987. Biology and social ecology of the Black Sea bottlenose dolphin. In: Belkovich, V. M., ed. Behaviour and Bioacoustics of Cetaceans. Institute of Oceanology, AN USSR, Moscow, 68-93 [In Russian].

OPEN ACCESS

Journal + Issues

Search