North Pacific right whale up-call source levels and propagation distance on the southeastern Bering Sea shelf

2011 ◽  
Vol 129 (6) ◽  
pp. 4047-4054 ◽  
Author(s):  
Lisa M. Munger ◽  
Sean M. Wiggins ◽  
John A. Hildebrand
Keyword(s):  
Bering Sea ◽  
North Pacific ◽  
Propagation Distance ◽  
Right Whale ◽  
Bering Sea Shelf

scholarly journals Acoustic detection and satellite-tracking leads to discovery of rare concentration of endangered North Pacific right whales

2006 ◽  
Vol 2 (3) ◽  
pp. 417-419 ◽  
Author(s):  
Paul Wade ◽  
Mads Peter Heide-Jørgensen ◽  
Kim Shelden ◽  
Jay Barlow ◽  
James Carretta ◽  
...  
Keyword(s):  
Bering Sea ◽  
North Pacific ◽  
Right Whale ◽  
The North ◽  
Right Whales ◽  
Time Position ◽  
Eubalaena Japonica ◽  
Bering Sea Shelf ◽  
The North Pacific ◽  
The Bering Sea

The North Pacific right whale, Eubalaena japonica , is one of the most endangered species of whale in the world. On 10 August 2004, two right whales were located in the Bering Sea using headings to right whale calls provided by directional sonobuoys. A satellite-monitored radio tag attached to one of these whales functioned for 40 days. Over the 40-day period, this whale moved throughout a large part of the southeast Bering Sea shelf, including areas of the outer-shelf where right whales have not been seen in decades. In September, multiple right whales were acoustically located and subsequently sighted by another survey vessel approaching a near-real-time position from the tag. An analysis of photographs confirmed at least 17 individual whales (not including the tagged whales). Genetic analysis of biopsy samples identified 17 individuals: 10 males and 7 females. The discovery of seven females was significant, as only one female had been identified in the past. Genetics also confirmed the presence of at least two calves. Although the future of this population is highly uncertain, the discovery of additional females and calves gives some hope that this most critically endangered of all whale populations may still possess the capacity to recover.

scholarly journals Preliminary estimates of whaling-induced mortality in the 19th century North Pacific right whale (Eubalaena japonicus) fishery, adjusting for struck-but-lost whales and non-American whaling

2020 ◽  
pp. 261-268
Author(s):  
James E. Scarff
Keyword(s):  
19Th Century ◽  
Bering Sea ◽  
North Pacific ◽  
Total Mortality ◽  
Right Whale ◽  
The North ◽  
Right Whales ◽  
Adjustment Factors ◽  
The 19Th Century ◽  
The North Pacific

This study develops preliminary estimates of total whaling-induced mortality of northern right whales in the 19th century North Pacificpelagic whale fishery. Best’s (1987) study of American whaling returns resulted in estimates of the total American catch of 14,480 and15,374 northern right whales during the period 1839-1909. The present study offers adjustment factors to estimate total mortality from thesecatch data. Quantitative data from 14 pelagic expeditions for northern right whales in the North Pacific from 1838-1860 and additionalanecdotal information about struck-but-lost animals is reviewed. On 12 voyages, 327 northern right whales were struck with harpoons, butonly 133 landed. Adjusted for the subsequent recovery of struck whales, this implies a ratio of 2.43 whales struck for each whale eventuallysecured and flensed by whaleships. Data from four voyages show that of 148 northern right whales struck with harpoons, 14 sank beforethey could be processed. From a sample of five voyages, 80 northern right whales were landed and 31 carcasses sank without being secured.During the height of pelagic whaling in the North Pacific, approximately 10% of the fleet was non-American, primarily French. Adjustingrecorded catch estimates for struck-but-lost mortality and non-American whaling yields preliminary estimates of total mortality in thisfishery in the range of 26,500-37,000 animals during the period 1839-1909. In the single decade of 1840-49, between 21,000-30,000northern right whales may have been killed in the North Pacific, Sea of Okhotsk and Bering Sea, representing about 80% of the northernright whales killed in this region during the period 1839-1909.

Estimating North Pacific Right Whale calling depths in the Bering Sea via modal dispersion

2018 ◽  
Vol 144 (3) ◽  
pp. 1696-1696
Author(s):  
Dana Wright ◽  
Aaron Thode ◽  
Julien Bonnel ◽  
Margaux Thieury ◽  
Aileen Fagan ◽  
...  
Keyword(s):  
Bering Sea ◽  
North Pacific ◽  
Modal Dispersion ◽  
Right Whale ◽  
The Bering Sea

scholarly journals The world's smallest whale population?

2010 ◽  
Vol 7 (1) ◽  
pp. 83-85 ◽  
Author(s):  
Paul R. Wade ◽  
Amy Kennedy ◽  
Rick LeDuc ◽  
Jay Barlow ◽  
Jim Carretta ◽  
...  
Keyword(s):  
Bering Sea ◽  
North Pacific ◽  
Direct Consequence ◽  
International Management ◽  
Abundance Estimate ◽  
Right Whale ◽  
The North ◽  
Pacific Population ◽  
Eubalaena Japonica ◽  
The Bering Sea

The North Pacific right whale ( Eubalaena japonica ) was heavily exploited by both nineteenth century whaling and recent (1960s) illegal Soviet catches. Today, the species remains extremely rare especially in the eastern North Pacific. Here, we use photographic and genotype data to calculate the first mark–recapture estimates of abundance for right whales in the Bering Sea and Aleutian Islands. The estimates were very similar: photographic = 31 (95% CL 23–54), genotyping = 28 (95% CL 24–42). We also estimated the population contains eight females (95% CL 7–18) and 20 males (95% CL 17–37). Although these estimates may relate to a Bering Sea subpopulation, other data suggest that the total eastern North Pacific population is unlikely to be much larger. Its precarious status today—the world's smallest whale population for which an abundance estimate exists—is a direct consequence of uncontrolled and illegal whaling, and highlights the past failure of international management to prevent such abuses.

Acoustic detection of the critically endangered North Pacific right whale in the northern Bering Sea

2018 ◽  
Vol 35 (1) ◽  
pp. 311-326 ◽  
Author(s):  
Dana L. Wright ◽  
Catherine L. Berchok ◽  
Jessica L. Crance ◽  
Phillip J. Clapham
Keyword(s):  
Bering Sea ◽  
North Pacific ◽  
Critically Endangered ◽  
Acoustic Detection ◽  
Right Whale ◽  
Northern Bering Sea

scholarly journals Space use patterns of the endangered North Pacific right whale Eubalaena japonica in the Bering Sea

2015 ◽  
Vol 532 ◽  
pp. 269-281 ◽  
Author(s):  
AN Zerbini ◽  
MF Baumgartner ◽  
AS Kennedy ◽  
BK Rone ◽  
PR Wade ◽  
...  
Keyword(s):  
Bering Sea ◽  
North Pacific ◽  
Space Use ◽  
Use Patterns ◽  
Right Whale ◽  
Eubalaena Japonica ◽  
The Bering Sea

Using nonlinear time warping to estimate North Pacific right whale calling depths and propagation environment in the Bering Sea

2017 ◽  
Vol 142 (4) ◽  
pp. 2711-2712
Author(s):  
Aaron Thode ◽  
Julien Bonnel ◽  
Margaux Thieury ◽  
Aileen Fagan ◽  
Christopher M. Verlinden ◽  
...  
Keyword(s):  
Bering Sea ◽  
North Pacific ◽  
Time Warping ◽  
Right Whale ◽  
The Bering Sea

Contemporary distribution of the eastern North Pacific right whale in the Bering Sea

2017 ◽  
Vol 142 (4) ◽  
pp. 2503-2503 ◽  
Author(s):  
Dana Wright ◽  
Jessica Crance ◽  
Daniel Woodrich ◽  
Arial Brewer ◽  
Catherine L. Berchok
Keyword(s):  
Bering Sea ◽  
North Pacific ◽  
Right Whale ◽  
The Bering Sea
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