Density and Abundance of Delphinus delphis in Waters South of Samos Island, Greece (Eastern Mediterranean Sea)

摘要: The Mediterranean subpopulation of short-beaked common dolphin Delphinus delphis is ranked as endangered on the IUCN (International Union for Conservation Nature) Red List because it has sharply declined during last decades, resulting in sparse and decreasing populations. Monitoring conservation status this species particularly relevant to fulfil targets under range several international agreements. Moreover, estimating abundance D. essential verify effectiveness action maintain safe population levels Sea suggest appropriate modifications limit potential threats. In regard, a monitoring program Samos Island (Greece) was carried out from 2016 2019, adopting random line transect sampling method. overall density estimates delphis, obtained by applying conventional distance (CDS) sighting data, were 0.15 individuals/km2 (CV = 13.27%; 95% CI 0.11–0.19 individuals/km2) 51 individuals 40-66 individuals), respectively. Although, longer time series data should be collected larger area investigated better understand trend its residency pattern, results contribute setting up baseline reference future assessment Eastern Aegean Sea.