Sato's beaked whale

Sato's beaked whale (Berardius minimus) is a little-known species of four-toothed whale.[3]

Sato's beaked whale
Temporal range: Middle Miocene to present,
Illustration of Berardius minimus (black scale bar is 1 metre [3.3 ft])
Size compared to an average human
CITES Appendix I (CITES)[2]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Infraorder: Cetacea
Family: Ziphiidae
Genus: Berardius
Species:
B. minimus
Binomial name
Berardius minimus
Yamada, Kitamura & Matsuishi, 2019

Description

Sato's beaked whale is one of the poorly distinguished species in the genus Berardius. It was distinguished from Arnoux's and Baird's beaked whale in 2019 on the basis of mtDNA differences.[4][5] It generally has a short beak (~4% body length). While other four-toothed whales are generally grey with scars, kurotsuchis usually have few linear scars, so that the dark, smooth skin contrasts highly with round, white scars of about 5 cm diameter (from cookiecutter shark bites).[5] The common name for Berardius minimus is in recognition of Hal Sato, a Hokkaido-based researcher whose photographs of the whales helped to distinguish this species from other beaked whales (note the image credit in Figure 1 and Figure 2 from the Yamada et. al. paper [5]).[6][7]

Distribution

The species' distribution, based on genetic samples from strandings only, is believed to include the sea around Japan, the Russian Federation, and Alaska.[1]

Conservation

Although very little is known about the ecology and populations of Sato's beaked whale, the IUCN has assigned the species a classification of Near threatened based on its estimated low population numbers.[1]

References
  1. Brownell Jr., R.L. (2020). "Sato's Beaked Whale". IUCN Red List of Threatened Species. 2020. Retrieved 17 July 2021.
  2. "Appendices | CITES". cites.org. Retrieved 2022-01-14.
  3. "Berardius minimus Yamada, Kitamura & Matsuishi in Yamada, Kitamura, Abe, Tajima, Matsuda, Mead & Matsuishi, 2019". Catalogue of Life. Species 2000: Leiden, the Netherlands. Retrieved 17 July 2021.
  4. Morin, P. A.; Scott Baker, C.; Brewer, R. S.; Burdin, A. M.; Dalebout, M. L.; Dines, J. P.; Fedutin, I.; Filatova, O.; Hoyt, E.; Jung, J.-L.; Lauf, M.; Potter, C. W.; Richard, G.; Ridgway, M.; Robertson, K. M.; Wade, P. R. (2016). "Genetic structure of the beaked whale genus Berardius in the North Pacific, with genetic evidence for a new species". Marine Mammal Science. 33: 96–111. doi:10.1111/mms.12345. S2CID 88899974.
  5. Yamada, T.K.; Kitamura, S.; Abe, S.; Tajima, Y.; Matsuda, A.; Mead, J.G.; Matsuishi, T.F. (2019). "Description of a new species of beaked whale (Berardius) found in the North Pacific". Scientific Reports. 9 (1): 12723. Bibcode:2019NatSR...912723Y. doi:10.1038/s41598-019-46703-w. PMC 6717206. PMID 31471538.
  6. Bidal, Devon. "Scientists Had Never Seen This Elusive Whale Alive—Until Now". Hakai Magazine. Retrieved 2023-01-06.
  7. Hathaway, Rozi. "An Illustrated Tribute to the Sato's Beaked Whale". Hakai Magazine. Retrieved 2023-01-06.


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