Show simple item record

dc.contributor.authorDellabianca, N.
dc.contributor.authorScioscia, G.
dc.contributor.authorSchiavini, A.
dc.contributor.authorRaya Rey, A.
dc.date.accessioned2020-06-08T16:10:11Z
dc.date.available2020-06-08T16:10:11Z
dc.date.issued2012
dc.identifier.doihttps://doi.org/10.1007/s00300-012-1217-0.
dc.identifier.urihttp://hdl.handle.net/1834/17143
dc.description.abstractThe hourglass dolphin, Lagenorhynchus cruciger, is one of the smallest cetaceans found in Antarctic waters. Although frequently observed, this is one of the least studied species of dolphin. In this study, we investigate the occurrence of hourglass dolphin in the South-West Atlantic and Southern Ocean from 42A degrees S to 63A degrees S and characterize the oceanographic and environmental features associated with their occurrence. Sighting data were collected during two scientific cruises in December 2009 and January and February 2011 and integrated into a geographical information system with environmental variables such as sea surface temperature, ocean colour, depth, distance to oceanographic fronts and distance from shore. We used a principal component analysis (PCA) to identify patterns in data and a non-hierarchic cluster analysis (K means) to classify observations into groups. A total of 19 sightings (96 individuals) were recorded. Group size ranged from one to twelve dolphins (mean 5.05). We could differentiate two groups in relation to the environmental conditions where animals were found, one group occurring in shallow coastal waters and the other occurring in deeper and colder waters further offshore. The present study contributes novel information on environmental measures associated with hourglass dolphin distribution in the South-West Atlantic and Southern Oceans. Additionally, it includes relatively high sighting clusters of this species in two highly productive and biodiverse areas (Burdwood Bank/Isla de los Estados and the South Shetland Islands).en_US
dc.language.isoenen_US
dc.titleOccurrence of hourglass dolphin (Lagenorhynchus cruciger) and habitat characteristics along the Patagonian Shelf and the Atlantic Ocean sector of the Southern Oceanen_US
dc.typeJournal Contributionen_US
dc.bibliographicCitation.issue12en_US
dc.bibliographicCitation.titlePolar Biologyen_US
dc.bibliographicCitation.volume35en_US
dc.description.statusPublisheden_US
dc.format.pagerangepp.1921-1927en_US
dc.type.refereedRefereeden_US
refterms.dateFOA2021-01-30T18:47:53Z


Files in this item

Thumbnail
Name:
SolicitarDocumento.pdf
Size:
302.3Kb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record