Southeastern Azov Sea. Surface of the sea along 13 parallel tracklines predetermined at regular 10-km intervals according to the direction SE127˚─NW307˚.

Cetacean abundance

Aerial surveying the distribution, abundance and species composition of cetaceans in Russian and Ukrainian waters of the Black and Azov Seas (Azovka-2002). Sightings of cetaceans: harbour porpoises (Phocoena phocoena relicta). On three high-winged twin-engine amphibian aeroplanes CHE-22.

Birkun A.A., Jr., Frantzis A. (2008) Phocoena phocoena ssp. relicta. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. <www.iucnredlist.org>, ; Birkun A., Jr. (2008) The state of cetacean populations. Pp. 365-399 in: State of the Environment of the Black Sea: 2001-2006/7 (Ed. by T. Oguz). BSC Publ., Istanbul, Turkey, 448 p., ; Birkun A., Jr., Glazov D., Krivokhizhin S., Mukhametov L. (2003) Distribution and abundance estimates of cetaceans in the Azov Sea, Kerch Strait and northeastern shelf area of the Black Sea: Results of aerial surveys in July 2001 and August 2002. 55th Meet. IWC Scientific Committee (Berlin, 26 May – 6 June 2003), SC/55/SM15, 9 p., ; Birkun A., Jr., Glazov D., Krivokhizhin S., Nazarenko E., Mukhametov L. (2003) Species composition and abundance estimates of cetaceans in the Kerch Strait and adjacent areas of the Black and Azov Seas: The second series of aerial surveys (August 2002). Pp.271-272 in: Abstr. 17th Annual Conf. of the European Cetacean Society (Las Palmas de Gran Canaria, 9-13 March 2003), 285pp., ; 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 p., ; Krivokhizhin S.V. (2009) State of cetacean populations in the waters of Ukraine. PhD thesis, Institute of Biology of Southern Seas, Sevastopol, Ukraine. 228 p. (In Russian).,

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