FN Archimer Export Format PT J TI Horizontal and vertical movements of humpback whales inform the use of critical pelagic habitats in the western South Pacific BT AF DERVILLE, Solene TORRES, Leigh G. ZERBINI, Alexandre N. OREMUS, Marc GARRIGUE, Claire AS 1:1,2,3,4;2:4;3:5;4:6;5:1,2; FF 1:;2:;3:;4:;5:; C1 UMR ENTROPIE, IRD, 101 promenade Roger Laroque, 98848, Nouméa, New Caledonia Operation Cétacés, BP12827, 98802, Nouméa, New Caledonia Universités, UPMC Univ Paris 6, IFD-ED129, 4 Place Jussieu, Paris, 75252, France. Geospatial Ecology of Marine Megafauna Lab, Marine Mammal Institute, Department of Fisheries and Wildlife, Oregon State University, 2030 SE Marine Science Drive, Newport, 97365, OR, USA Marine Mammal Laboratory, Alaska Fisheries Science Center, 2725 Montlake Blvd E, Seattle, 98112, WA, USA WWF France, Parc Forestier Michel Corbasson, BP692, 98845, Nouméa, New Caledonia. C2 IRD, FRANCE OPERAT CETACES, FRANCE UNIV PARIS 6, FRANCE UNIV OREGON STATE, USA ALASKA FISHERIES SCI CTR, USA WWF FRANCE, FRANCE UM ENTROPIE IN WOS Cotutelle UMR DOAJ copubli-france copubli-univ-france copubli-int-hors-europe IF 4.379 TC 26 UR https://archimer.ifremer.fr/doc/00860/97178/106051.pdf https://archimer.ifremer.fr/doc/00860/97178/106052.pdf LA English DT Article CR MARACAS 3 BO Alis AB Humpback whales (Megaptera novaeangliae) are known for their nearshore distribution during the breeding season, but their pelagic habitat use patterns remain mostly unexplored. From 2016 to 2018, 18 humpback whales were equipped with depth-recording satellite tags (SPLASH10) to shed light on environmental and social drivers of seamount association around New Caledonia in the western South Pacific. Movement paths were spatially structured around shallow seamounts (<200 m). Indeed, two males stopped over the Lord Howe seamount chain during the first-ever recorded longitudinal transit between New Caledonia and the east coast of Australia. Residence time significantly increased with proximity to shallow seamounts, while dive depth increased in the vicinity of seafloor ridges. Most of the 7,986 recorded dives occurred above 80 m (88.5%), but deep dives (>80 m, max 616 m) were also recorded (11.5%), including by maternal females. Deep dives often occurred in series and were characterized by U-shapes suggesting high energy expenditure. This study provides new insights into the formerly overlooked use of pelagic habitats by humpback whales during the breeding season. Given increasing anthropogenic threats on deep sea habitats worldwide, this work has implications for the conservation of vulnerable marine ecosystems. PY 2020 PD MAR SO Scientific Reports SN 2045-2322 PU Nature Publishing Group VL 10 IS 1 UT 000563448300020 DI 10.1038/s41598-020-61771-z ID 97178 ER EF