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

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

and

Russia Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...

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.

Size

The Sakhalin sturgeon has reached the maximum recorded length of about 150 centimeters or about 59 inches as a tall fish.

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.

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.

Distribution

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

Threats

The threats that are affecting the population of the Sakhalin sturgeon include illegal poaching, trawling, accidental bycatch, pollution, and construction of dams. Currently, the species' population is significantly decreasing and is on the brink of extinction.

Common names

The common names of the Sakhalin sturgeon in various languages include the following: *Acipenser mikadoi : Italian (Italiano) *Mikado Chôzame (帝蝶鮫) : 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

Taxonomy

According to recent genetic data, the differences between the mitogenomes of the Sakhalin sturgeon (''Acipenser mikadoi'') and the

Green sturgeon The green sturgeon (''Acipenser medirostris'') is a species of sturgeon native to the northern Pacific Ocean, from China and Russia to Canada and the United States. Description Sturgeons are among the largest and most ancient of ray finn ...

(''Acipenser medirostris'') to correspond to the variability at the

intraspecific Biological specificity is the tendency of a characteristic such as a behavior or a biochemical variation to occur in a particular species. Biochemist Linus Pauling stated that "Biological specificity is the set of characteristics of living organ ...

level. The time since the divergence of the Sakhalin sturgeon and the

may be approximately 160,000 years.

References

Sources

{{Taxonbar, from=Q1842196 Acipenser Fish of East Asia Fish of Japan Fish of Russia sturgeon Critically endangered fish Critically endangered biota of Asia Taxonomy articles created by Polbot Taxa named by Franz Martin Hilgendorf Fish described in 1892