Counts of seabirds, marine mammals and other megafauna during POLARSTERN cruise ANT-XXVIII/1

• Main Authors: Jungblut, Simon, Nachtsheim, Dominik A, Boos, Karin, Joiris, Claude R
• Format: Dataset
• Language: English
• Published: PANGAEA 2017
• Subjects: Albatrosses; Alca torda; Alcidae sp.; Anous stolidus; ANT-XXVIII/1; Arctocephalus pusillus; Atlantic; transit cruise; Balaenoptera acutorostrata; Balaenoptera borealis; Balaenoptera brydei; Balaenoptera physalus; Beaked whale; Branta bernicla; Bulweria bulwerii; Calonectris diomedea; Calonectris edwardsii; Caretta caretta; Catharacta antarctica; Catharacta maccormicki; Catharacta skua; Chelonia mydas; Chlidonias niger; CT; Daption capense; DATE/TIME; Delphinus delphis; Depth; bathymetric; Dermochelys coriacea; Diomedea dabbenena; Diomedea epomophora; Diomedea exulans; Diomedea sanfordi; Diomedea sp.; Distance; Dolphins; unidentified; Eudyptes chrysocome; Fluorescence; chlorophyll; Fregata aquila; Fregata magnificens; Fregetta grallaria; Fulmarus glacialis; Garrodia nereis; Gavia arctica; Globicephala macrorhynchus; Globicephala melas; Globicephala sp.; Antarc*; Antarctica; Berichte zur Polar- und Meeresforschung; Polar Biology; Reports on Polar and Marine Research
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.868986; https://doi.org/10.1594/PANGAEA.868986

Please note: Abstract created by PANGAEA data editor using Jungblut et al. (2017). Marine top predators (seabirds, marine mammals and other megafauna) were counted during POLARSTERN cruise ANT-XXVIII/1 passing the east Atlantic from Bremerhaven to Cape Town in fall 2011. Continuous half-hour transect counts were conducted by two observers from the bridge, situated approximately 18 meters above sea level, throughout daylight hours and while the vessel maintained its traveling speed (see Joiris & Falck 2011). Due to the width of the bridge, observations were limited to a 90° angle from the bow to one side, as it was impractical for one observer to simultaneously cover both sides. Species were initially identified with the naked eye and confirmed using binoculars (8 – 10 times magnification). Photos were used in retrospect to help identify rare or hard to classify specimens. Individuals following or circling around the ship were only counted once in a 30 min interval (i.e. during one 'transect count'). Water temperature and salinity were continuously and automatically recorded by a thermo-salinometer installed at the keel of the Polarstern (approximately 10 meters below sea level). Depth data were obtained either from the vessel's echosounder or hydrosweep. Data extraction was carried out from the DShip data system on board.