Presence of Delphinus capensis and Delphinus delphis (Cetacea: Delphinidae) in Uruguay

Range extension for the common dolphin (Delphinus sp.) to the Colombian Caribbean, with taxonomic implications from genetic barcoding and phylogenetic analyses

“…capensis ranging in coastal areas [ 1 , 17 ], some studies have found that dolphins with longer beaks not only can occur in deep waters, but that they also feed on prey associated with offshore areas [ 6 , 59 ]. Also, in some coastal areas off Uruguay and Mauritania, where the long-baked morphotype is reported, some studies have found both forms distributed together not only inshore but also in offshore areas [ 6 , 7 ]. In addition, reports of common dolphins in southern Brazil and Argentina have been made in offshore areas with depths ranging between 71 to 1435 m, and according to morphological analyses, both morphotypes are distributed in these areas [ 22 ].…”

“…delphis [ 1 , 3 ]. Nevertheless, the separation of the genus Delphinus into a short-beaked and a long-beaked species on a global scale is not clear under these morphological, phylogenetic, and genetic evidence, and therefore taxonomy of this species remains controversial [ 4 , 5 , 6 , 7 , 8 ].…”

“…delphis ) only applies to the Eastern North Pacific populations since the results of Heyning & Perrin [ 1 ] have not been validated for common dolphin populations elsewhere [ 4 , 7 , 8 ]. Particularly in the Western South Atlantic, the long-beaked morphotype has been described only based on a report published by Casinos [ 21 ], who conducted craniometric measurements on ten specimens from Venezuela, Brazil and Argentina, of which only six corresponded to the long-beaked morphotype [ 1 , 7 ]. In fact, initial morphological and genetic studies of Western South Atlantic specimens suggest that a different taxonomic classification should be considered in this region [ 4 , 11 , 14 , 22 , 23 ].…”

New Records of Common Dolphins (Cetacea: Delphinidae) in Deep Waters of the Southwestern Atlantic Ocean

“…For the area that extends from southern Brazil to Argentina sightings were recorded in deeper waters, ranging from 71m to 1435m in the middle continental shelf and slope, with occasional coastal sightings in Argentina (Tavares et al, 2010). In Uruguayan waters, information about cetacean distribution comes primarily from stranding records (as reported by Del Bene et al, 2006;González & Martínez, 2010), as well as a small number of offshore sighting records (Tavares et al, 2010;Juri et al, 2012;Passadore et al, 2015). The aim of this paper is to present new records of common dolphins for deeper waters (> 2800 m) in the Southwestern Atlantic Ocean.…”

“…Previous records for the study area (Fig. 1) corresponded to: one specimen captured over 342m depth (Juri et al, 2012), four specimens captured incidentally by fishing vessels over 219m, 520m, 819m and 957m depth (Passadore et al, 2015), and a sighting in the marine boundary between Brazilian and Uruguayan waters over 1435m deep (Tavares et al, 2010).…”