MEDIA RELEASE

Designated Corporation for Scientific Whale Research
THE INSTITUTE OF CETACEAN RESEARCH
August 1, 2024

2024 IWC/Japan Joint Cetacean Sighting Survey Cruise in the North
Pacific – Departure of the IWC-POWER research vessel

1. Background
This survey is conducted jointly by the International Whaling Commission (IWC) andJapan, and is commonly referred to as IWC-POWER (International Whaling
Commission/Pacific Ocean Whale and Ecosystem Research). IWC-POWER is thesuccessor of IWC/SOWER (International Whaling Commission Southern Ocean Whaleand Ecosystem Research), a successful whale research program acclaimed globally,
which was conducted in the Antarctic Ocean from 1996/1997 to 2009/2010. Taking
advantage of the know-how, experience and achievements of IWC/SOWER,IWC-POWER has been carried out every summer since 2010 based on the main
research plan of the IWC Scientific Committee.
For the past fourteen years, the IWC-POWER research cruises have widely surveyed
mainly the Northeast Pacific and have been covering a wide area of the North Pacificthat had not been surveyed for several decades, finding large numbers of fin and sei
whales in the Gulf of Alaska area north of 40 degrees north latitude and a large numberof Bryde’s and sperm whales in waters south of 40 degrees N, and valuable data havebeen collected to contribute to objective stock assessment of these species. In addition,
distribution information on rare species such as blue whales and right whales has also
been collected.
As the 15th cruise, with the generous cooperation of the U.S. government, this time wewill conduct a survey for the first time in the Arctic Ocean (southern part of the Chukchi
Sea: within the U.S. EEZ), as well as in the eastern Bering Sea (south of 69th parallel N
latitude, north of the Aleutian Islands, east of 175° W longitude, and west of the 155° W
longitude line, within the exclusive economic zone of the United States), from August 2to October 10. The survey will be conducted by a total of four researchers, two eachfrom U.S. and from Japan.
2. Outline of the 2024 Research Cruise
The IWC-POWER program is conducted collaboratively by the IWC and theGovernment of Japan. The IWC Scientific Committee has developed the research
program and established the IWC-POWER Steering Group (Convenor: Koji Matsuoka,ICR), which has a role of designing the research plan and analyzing the results of thecruises. The Institute of Cetacean Research, under the commission of the Fisheries
Agency of Japan, carries out the IWC-POWER cruises. The outline of this year’s survey
plan is as follows:12.1 Main objectives(1) Collection of information for the in-depth stock assessment of humpback whales
and gray whales.
(2) Collection of data on distribution and stock structure of the rare North Pacific rightwhale.
(3) Collection of data on abundance and stock structure of other whale resources withinsufficient resource information.
(4) Collection of basic information, including oceanographic (sea water temperature,marine debris, etc.) necessary for the development of the medium- to long-term planof this research program.
2.2 Research Cruise Period
From August 2 to October 10, 2024 (70 days)
2.3 Research Area
Waters part of the Chukchi Sea and of the Bering Sea (Figure 1).
The research vessel will call at the port of Dutch Harbor, Alaska to embark anddisembark U.S. researchers and to load and unload survey materials.

Figure 1. 2024 IWC-POWER survey area (green; within the U.S. Exclusive EconomicZone), and survey course (blue bold lines), and round-trip voyage (black-arrowed line).
2.4 International Researchers
The survey will be conducted by the following international researchers appointed by
the IWC Scientific Committee.
Hiroto Murase (Cruise leader, Tokyo University of Marine Science and Technology,Japan)
Jessica Crance (Alaska Fisheries Science Center, NOAA/AFSC, USA)Peter Duley (Northeast Fisheries Science Center, NOAA/NEFSC, USA)
Isamu Yoshimura (IWC-nominated international researcher, Japan)22.5 Research vessel
Yushin-Maru No. 2 (747 tons, Captain Hidenori Kasai, 16 crewmen).
2.6 Operating bodyThe Institute of Cetacean Research (ICR, Japan)
Photographs from previous IWC-POWER cruises (Copyright IWC/ICR).

Blue whale breathing at sea surface (2022)

Head of a rare North Pacific rare whale (2023)

A fin whale surfacing. The right lower jaw is white (2023)

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Caudal fin of a humpback whale photographed near the Aleutian Islands (2022)

International researcher deploying U.S.-made acoustic observation equipment (2023)

Observers and international researchers confirming whale species from the observation
platform (2023)
END

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