Interannual variability in acoustic detection of blue and fin whale calls in the Northeast Atlantic High Arctic between 2008 and 2018

被引:16
作者
Ahonen, Heidi [1 ]
Stafford, Kathleen M. [2 ]
Lydersen, Christian [1 ]
Berchok, Catherine L. [3 ]
Moore, Sue E. [4 ]
Kovacs, Kit M. [1 ]
机构
[1] Norwegian Polar Res Inst, N-9296 Tromso, Norway
[2] Univ Washington, Appl Phys Lab, Seattle, WA 98105 USA
[3] NOAA, Marine Mammal Lab, AFSC, Seattle, WA 98115 USA
[4] Univ Washington, Dept Biol, Seattle, WA 98105 USA
关键词
Balaenoptera musculus musculus; Balaenoptera physalus; Passive acoustic monitoring; Seasonal occurrence; Temporal expansion; BALAENOPTERA-MUSCULUS; BOWHEAD WHALES; CLIMATE-CHANGE; AMBIENT NOISE; FRAM STRAIT; CHUKCHI SEA; SOUNDS; RANGE; VOCALIZATIONS; CONSERVATION;
D O I
10.3354/esr01132
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
Northern Hemisphere blue and fin whales are regular summer migrants to Arctic waters. Given the profound changes the Arctic is currently undergoing due to global warming, changes in habitat use and distribution of these migratory species are predicted. In this study, 3 passive acoustic recorders, 2 in Fram Strait about 95 km apart and 1 north of the Svalbard Archipelago (Atwain), were used to investigate the spatial and temporal vocal occurrence of these species in the Northeast Atlantic High Arctic. Acoustic data were available for 7 years for western Fram Strait (WFS), 2.5 years for central Fram Strait (CFS) and 3 years for Atwain. At both Fram Strait locations, most blue whale call detections occurred from August through October, though recently (2015-2018) in WFS a clear increase in blue whale call rates was detected in June/July, suggesting an expansion of the seasonal occurrence of blue whales. In WFS, fin whale calls were detected intermittently, at low levels, almost year-round. In CFS, fin whale calls were more frequent but occurred mainly from July through December. At Atwain, blue whale detections commenced in July, both species were recorded in September/October and fin whale calls extended into November. Results from this study provide novel long-term baseline information about the occurrence of blue and fin whales at extreme northerly locations, where traditional ship-based survey methods are seasonally limited. Continued sampling will support investigation of how environmental change influences cetacean distribution and habitat use.
引用
收藏
页码:209 / 224
页数:16
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