Effectiveness of acoustic localization in documenting spatial and temporal patterns in autumn migration of bowhead whales in the Alaskan Beaufort sea

2004 ◽  
Vol 116 (4) ◽  
pp. 2588-2588
Author(s):  
Susanna B. Blackwell ◽  
Robert G. Norman ◽  
Charles R. Greene ◽  
Miles W. McLennan ◽  
Trent L. McDonald ◽  
...  
Keyword(s):  
Temporal Patterns ◽  
Beaufort Sea ◽  
Autumn Migration ◽  
Spatial And Temporal Patterns ◽  
Acoustic Localization ◽  
Bowhead Whales

Acoustic localization of bowhead whales near a Beaufort Sea oil development, 2001–2003: Evidence of deflection at high‐noise times?

2004 ◽  
Vol 116 (4) ◽  
pp. 2589-2589
Author(s):  
W. John Richardson ◽  
Trent L. McDonald ◽  
Charles R. Greene ◽  
Susanna B. Blackwell ◽  
Bill Streever
Keyword(s):  
Beaufort Sea ◽  
High Noise ◽  
Acoustic Localization ◽  
Bowhead Whales ◽  
Oil Development

scholarly journals Use of the Alaskan Beaufort Sea by Bowhead Whales (Balaena mysticetus) Tagged with Satellite Transmitters, 2006 – 18

ARCTIC ◽  
2020 ◽  
Vol 73 (3) ◽  
pp. 278-291
Author(s):  
Justin Olnes ◽  
John J. Citta ◽  
Lori T. Quakenbush ◽  
John C. George ◽  
Lois A. Harwood ◽  
...  
Keyword(s):  
Satellite Telemetry ◽  
State Space Model ◽  
Beaufort Sea ◽  
Bowhead Whale ◽  
Movement Behavior ◽  
Autumn Migration ◽  
Bowhead Whales ◽  
Dive Behavior ◽  
Satellite Transmitters ◽  
Switching State

We used satellite telemetry to examine bowhead whale movement behavior, residence times, and dive behavior in the Alaskan Beaufort Sea, 2006 – 18. We explored the timing and duration of use of three subregions (western, central, eastern) within the Alaskan Beaufort Sea and applied a two-state switching state-space model to infer bowhead whale behavior state as either transiting or lingering. Transiting whales made direct movements whereas lingering whales changed direction frequently and were presumably feeding. In spring, whales migrated across the Alaskan Beaufort Sea in 7.17 ± 0.41 days, primarily off the continental shelf over deep water. During the autumn migration, whales spent over twice as much time crossing the Alaskan Beaufort Sea than in spring, averaging 18.66 ± 2.30 days, spending 10.05 ± 1.22 days in the western subregion near Point Barrow. Most whales remained on the shelf during the autumn migration and frequently dove to the seafloor, where they spent 45% of their time regardless of behavioral state. Consistent dive behavior in autumn suggests that the whales were looking for food while migrating, and the identification of lingering locations likely reflects feeding. The lack of lingering locations in the eastern and central subregions suggests that prey densities are rarely sufficient to warrant whales pausing their migration for multiple days, unlike in the western subregion near Point Barrow, where bowhead whales regularly lingered for long periods of time.

SPATIAL AND TEMPORAL PATTERNS OF GROUNDWATER ELEVATION AND SALINITY ON ASSATEAGUE ISLAND

2016 ◽  
Author(s):  
Ruth Coffey ◽  
◽  
Hannah Sprinkle ◽  
Eric Sherry ◽  
Brian Sturgis ◽  
...  
Keyword(s):  
Temporal Patterns ◽  
Spatial And Temporal Patterns ◽  
Assateague Island

THE NEW RADIOCARBON DATASET FOR TRILITH MONUMENTS OF SOUTHEASTERN ARABIA

Radiocarbon ◽  
2020 ◽  
pp. 1-11
Author(s):  
R Garba ◽  
P Demján ◽  
I Svetlik ◽  
D Dreslerová
Keyword(s):  
Iron Age ◽  
Temporal Patterns ◽  
Temporal Analysis ◽  
Coastal Plains ◽  
Spatial And Temporal Patterns ◽  
Two Phase ◽  
Stone Monuments ◽  
South Central ◽  
Geographical Expansion ◽  
Spatio Temporal

ABSTRACT Triliths are megalithic monuments scattered across the coastal plains of southern and southeastern Arabia. They consist of aligned standing stones with a parallel row of large hearths and form a space, the meaning of which is undoubtedly significant but nonetheless still unknown. This paper presents a new radiocarbon (14C) dataset acquired during the two field seasons 2018–2019 of the TSMO (Trilith Stone Monuments of Oman) project which investigated the spatial and temporal patterns of the triliths. The excavation and sampling of trilith hearths across Oman yielded a dataset of 30 new 14C dates, extending the use of trilith monuments to as early as the Iron Age III period (600–300 BC). The earlier dates are linked to two-phase trilith sites in south-central Oman. The three 14C pairs collected from the two-phase trilith sites indicated gaps between the trilith construction phases from 35 to 475 years (2 σ). The preliminary spatio-temporal analysis shows the geographical expansion of populations using trilith monuments during the 5th to 1st century BC and a later pull back in the 1st and 2nd century AD. The new 14C dataset for trilith sites will help towards a better understanding of Iron Age communities in southeastern Arabia.

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