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- Title
NEW DATA ON CETACEAN ABUNDANCE AND DISTRIBUTION FOR THE THREE SPECIES PRESENT IN THE ROMANIAN TERRITORIAL BLACK SEA WATERS.
- Authors
Romulus-Marian, PAIU; Angelica, PAIU; Costin, TIMOFTE; Mihaela, MIREA-CÂNDEA; Dumitru, MURARIU
- Abstract
The Black Sea is hosting three species of cetaceans: Black Sea bottlenose dolphin (Tursiops truncatus ssp. ponticus, Barabasch-Nikiforov, 1940), Black Sea common dolphin (Delphinus delphis ssp. ponticus, Barabasch-Nikiforov, 1935), and Black Sea harbour porpoise (Phocoena phocoena ssp. relicta, Abel 1905). All three species are present in the Romanian Black Sea territorial waters and are subject of the IUCN Red List of Threatened species. The present study aims at filling the gap of knowledge regarding the present distribution and abundance of the cetacean species within the Romanian marine waters. Our new data are aimed at supporting the conservation efforts in line with the European Union Habitats and Marine Strategy Framework Directives and the Agreement on the Conservation of Cetaceans of the Black Sea, Mediterranean Sea and Contiguous Atlantic Area (ACCOBAMS). The paper presents the data collected and analysed from three vessel surveys during spring and summer, 2019 and 2020. The overall proportion of the stratum sampled was 7% of the 5871,423 Km2 study area, with more than 1100 km of transect lines. Collecting 196 cetacean sightings on-effort with 363 individuals, from all the three species (with mentioned subspecies). The abundance estimates per species revealed an abundance range between 1719 (95%CI 682-4335) and 2705 (95%CI 1097-6670) for bottlenose dolphins; between 873 (95%CI 278-2015) and 1032 (95%CI 336-3626) for common dolphins and 333 (95%CI 53-1375) and 3775 (95%CI 1934-9475) for harbour porpoises. Distribution maps indicate an increasing presence of bottlenose dolphins in north and in central parts, and of harbour porpoises in the central and southern parts of the surveyed area. The common dolphins, as expected, were recorded mainly towards the offshore limits of the area.
- Subjects
INTERNATIONAL Union for Conservation of Nature &; Natural Resources; CETACEA; TERRITORIAL waters; SEAWATER; BOTTLENOSE dolphin; SPECIES distribution; HARBOR porpoise; NUMBERS of species
- Publication
Oltenia, Studii si Comunicari Seria Stiintele Naturii, 2021, Vol 37, Issue 2, p157
- ISSN
1454-6914
- Publication type
Article