Sakhalin sturgeon

The Sakhalin sturgeon (Acipenser mikadoi) is a species of fish in the family Acipenseridae. It is found in Japan and Russia.

Sakhalin sturgeon
A Russian coin depicting a Sakhalin sturgeon

Critically Endangered  (IUCN 3.1)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Acipenseriformes
Family: Acipenseridae
Genus: Acipenser
Species:
A. mikadoi
Binomial name
Acipenser mikadoi

Environment

The Sakhalin sturgeon is known to be found in either a marine or freshwater environment within demersal depth range. This species is found in brackish waters. They are also native to a tropical climate.[1]

Size

The Sakhalin sturgeon has reached the maximum recorded length of about 150 centimeters or about 59 inches as an unsexed male.[1]

Biology

The Sakhalin sturgeon is considered to be a species that migrates up the river from the sea in order to spawn. During the months of April to May, the Sakhalin sturgeon feeds in the freshwater and then returns to the ocean during the summer.[1][2]

Identification

The Sakhalin sturgeon is recorded to be the colors of olive-green and dark green. Its sides have a yellowish white color and it includes an olive green stripe. The bottom lip of this species is split into two.[3]

Distribution

The Sakhalin sturgeon is commonly found in the areas of Northwest Pacific, Bering Sea, Tumnin or Datta river, northern Japan, and Korea.[1] This species currently spawns persistently in the Tumnin River.[4]

Threats

The threats that are affecting the population of the Sakhalin sturgeon include illegal poaching, trawling, accidental bycatch, pollution, and construction of dams.[4]

Common names

The common names of the Sakhalin sturgeon in various languages include the following:

  • Acipenser mikadoi : Italian (Italiano)
  • Chôzame : Japanese (日本語)
  • Jeseter severní : Czech (česky)
  • Mikadosampi : Finnish (suomen kieli)
  • Sakhalin sturgeon : English
  • сахалинский осетр : Russian (русский язык)
  • 米氏鱘 : Mandarin Chinese
  • 米氏鲟 : Mandarin Chinese[5]

Taxonomy

According to recent genetic data[6], the differences between the mitogenomes of the Sakhalin sturgeon (Acipenser mikadoi) and the Green sturgeon (Acipenser medirostris) to correspond to the variability at the intraspecific level. The time since the divergence of the Sakhalin sturgeon and the Green sturgeon may be approximately 160000 years.

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References
  1. "Acipenser mikadoi Hilgendorf, 1892 Sakhalin sturgeon". Fish Base. Retrieved 2 August 2013.
  2. "Acipenser mikadoi — Overview Sakhalin Sturgeon". Encyclopedia of Life. Retrieved 2 August 2013.
  3. "Sakhalin Sturgeon". Pond Life. Retrieved 2 August 2013.
  4. "Acipenser mikadoi". IUCN Red List of Threatened Species. Retrieved 2 August 2013.
  5. "Sakhalin sturgeon". The Website of Everything. Retrieved 2 August 2013.
  6. Shedko, Sergei (4 May 2017). "The Low Level of Differences between Mitogenomes of the Sakhalin Sturgeon Acipenser mikadoi Hilgendorf, 1892 and the Green Sturgeon A. medirostris Ayeres, 1854 (Acipenseridae) Indicates their Recent Divergence". Russian Journal of Marine Biology. 43 (2): 176–179. doi:10.1134/S1063074017020080.

Sources
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