Dwarf sturgeon

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Dwarf sturgeon
Pseudoscaphirhynchus hermanni.jpg
CITES Appendix II (CITES) [2]
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Acipenseriformes
Family: Acipenseridae
Genus: Pseudoscaphirhynchus
Species:
P. hermanni
Binomial name
Pseudoscaphirhynchus hermanni
(Kessler 1877)
Synonyms [3] [4]
  • Scaphirhynchus hermanniKessler 1877
  • Pseudoscaphirhynchus rossikowiNikolskii 1900

The dwarf sturgeon, little shovelnose sturgeon, or small Amu-Darya shovelnose sturgeon (Pseudoscaphirhynchus hermanni) is a species of fish in the family Acipenseridae. It is found in Turkmenistan, Uzbekistan and probably in Tajikistan.

Contents

Population

The Pseudoscaphirhynchus hermanni population is recorded to be a rare species. There are few recordings of this species being caught, but there are accusations that fishermen are unknowingly catching them. The population trend of this species is decreasing. The Pseudoscaphirhynchus hermanni is being negatively affected due to dams, poaching, water extraction, irrigation, and high levels of water pollution including mineral fertilizers, pesticides for cotton agriculture, and drainage waste. More survey work on this species is needed to determine the status of their population. Overall this species is recorded to be a critically endangered species. [1]

Diet

The Pseudoscaphirhynchus hermanni has a diet of small aquatic invertebrates.

Distribution

Pseudoscaphirhynchus hermanni is endemic to the Amu Darya river basin in Turkmenistan and Uzbekistan, and might also occur in Tajikistan. It formerly occurred up to the Aral Sea. [1]

Identification

The Pseudoscaphirhynchus hermanni has been recorded reaching a maximum length of 27 centimeters or 10.63 inches. The maximum reported weight of this species is 51 grams or 0.11 pounds. The oldest reported age of this species is six years old. This species is considered to be potamodromous. This species is also recorded to be sensitive to chemicals in the water. [5] One of the specific features of Pseudoscaphirhynchus hermanni is the crease on the external edge of the pectoral fin.

Environment

The Pseudoscaphirhynchus hermanni is recorded to live in freshwater or slightly salty environments within a demersal depth range. This species lives in a temperate climate. [5] [6]

Common names

The common names of the Pseudoscaphirhynchus hermanni in various languages include the following:

Related Research Articles

Transport in Turkmenistan includes roadways, railways, airways, seaways, and waterways, as well as oil-, gas-, and water pipelines. Road-, rail-, and waterway transport fall under the jurisdiction of the Ministry of Industry and Communications.

<span class="mw-page-title-main">Kyzylkum Desert</span> Desert in Central Asia between the Amu Darya and Syr Darya

The Kyzylkum Desert is the 15th largest desert in the world. Its name means Red Sand in Turkic languages. It is located in Central Asia, in the land between the confluent rivers Amu Darya and Syr Darya, a region historically known as Transoxania. Today it is divided between Kazakhstan, Turkmenistan and Uzbekistan. It covers about 298,000 km2 (115,000 sq mi).

<span class="mw-page-title-main">Aral Sea</span> Lake between Kazakhstan and Uzbekistan

The Aral Sea was an endorheic lake lying between Kazakhstan to its north and Uzbekistan to its south which began shrinking in the 1960s and largely dried up by the 2010s. It was in the Aktobe and Kyzylorda Regions of Kazakhstan and the Karakalpakstan autonomous region of Uzbekistan. The name roughly translates from Mongolic and Turkic languages to "Sea of Islands", referring to over 1,100 islands that had dotted its waters. The Aral Sea drainage basin encompasses Uzbekistan and parts of Tajikistan, Turkmenistan, Kyrgyzstan, Kazakhstan, Afghanistan, and Iran.

<span class="mw-page-title-main">Sturgeon</span> Ray-finned fish

Sturgeon is the common name for the 28 species of fish belonging to the family Acipenseridae. The earliest sturgeon fossils date to the Late Cretaceous, and are descended from other, earlier acipenseriform fish, which date back to the Early Jurassic period, some 174 to 201 million years ago. They are one of two living families of the Acipenseriformes alongside paddlefish (Polyodontidae). The family is grouped into four genera: Acipenser, Huso, Scaphirhynchus, and Pseudoscaphirhynchus. Two species may be extinct in the wild, and one may be entirely extinct. Sturgeons are native to subtropical, temperate and sub-Arctic rivers, lakes and coastlines of Eurasia and North America.

<span class="mw-page-title-main">Acipenseriformes</span> Order of fishes

Acipenseriformes is an order of basal ray-finned fishes that includes living and fossil sturgeons and paddlefishes (Acipenseroidei), as well as the extinct families Chondrosteidae and Peipiaosteidae. They are the second earliest diverging group of living ray-finned fish after the bichirs. Despite being early diverging, they are highly derived, having only weakly ossified skeletons that are mostly made of cartilage, and in modern representatives highly modified skulls.

<span class="mw-page-title-main">Sarygamysh Lake</span> Lake in Central Asia

The Sarygamysh Lake, also Sarykamysh or Sary-Kamysh, is a lake in Central Asia. It is about midway between the Caspian Sea and the Aral Sea. It is the largest lake in Turkmenistan, in which three quarters of the entire lake's area is located. The Sarykamysh basin and the Sarykamysh delta of the Amu Darya river are physical and geographical nature regions of the Dashoguz Region of Turkmenistan.

<span class="mw-page-title-main">Shovelnose sturgeon</span> Species of fish

The shovelnose sturgeon is the smallest species of freshwater sturgeon native to North America. It is often called hackleback, sand sturgeon, or switchtail. Switchtail refers to the long filament found on the upper lobe of the caudal fin. Shovelnose sturgeon are the most abundant sturgeon found in the Missouri River and Mississippi River systems, and were formerly a commercially fished sturgeon in the United States of America. In 2010, they were listed as threatened under the U.S. Endangered Species Act due to their resemblance to the endangered pallid sturgeon, with which shovelnose sturgeon are sympatric.

<span class="mw-page-title-main">Pallid sturgeon</span> Species of fish

The pallid sturgeon is an endangered species of ray-finned fish, endemic to the waters of the Missouri and lower Mississippi river basins of the United States. It may have even reached the St. Croix River before colonization.

<i>Aspiolucius esocinus</i> Species of fish

Aspiolucius esocinus or the pike asp is a species of cyprinid fish native to rivers, such as Amu Darya and Syr Darya, and occasionally lakes in Tajikistan, Kyrgyzstan, Turkmenistan, and Uzbekistan, where it was a common fish until 1980s. After that, the population had rapidly declined, so that the species was declared endangered in these countries, and extinct in the neighboring Kazakhstan. This species can reach a total length of 50 cm (20 in).

<i>Glyptosternon</i> Genus of fishes

Glyptosternon is a genus of sisorid catfishes native to Asia.

<span class="mw-page-title-main">Russian sturgeon</span> Species of fish

The Russian sturgeon, also known as the diamond sturgeon or Danube sturgeon, is a species of fish in the family Acipenseridae. It is found in Azerbaijan, Bulgaria, Georgia, Iran, Kazakhstan, Romania, Russia, Turkey, Turkmenistan, and Ukraine. It is also found in the Caspian Sea. This fish can grow up to about 235 cm (93 in) and weigh 115 kg (254 lb). Russian sturgeon mature and reproduce slowly, making them highly vulnerable to fishing. It is distinguished from other Acipenser species by its short snout with a rounded tip as well as its lower lip which is interrupted at its center.

<span class="mw-page-title-main">Sakhalin sturgeon</span> Species of fish

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

<span class="mw-page-title-main">Syr Darya sturgeon</span> Species of fish

The Syr Darya sturgeon is a species of fish in the family Acipenseridae. It is found in Kazakhstan, Tajikistan and Uzbekistan, where it is endemic to the Syr Darya River and, before its drainage, the Aral Sea. Due to the loss of its breeding site and damming projects over the length of the river, it is currently considered Critically Endangered and likely extinct, as no sightings have been reported since the 1960s. The sturgeon is among the 25 "most wanted lost" species that are the focus of Global Wildlife Conservation's "Search for Lost Species" initiative.

<i>Pseudoscaphirhynchus</i> Genus of fishes

Pseudoscaphirhynchus is a genus of relatively small, highly threatened sturgeons that are restricted to the Aral Sea system, including the Amu Darya and Syr Darya river basins, in Central Asia.

<span class="mw-page-title-main">Amu Darya sturgeon</span> Species of fish

The Amu Darya sturgeon or false shovelnose sturgeon is a critically endangered species of fish in the family Acipenseridae. It is found in Turkmenistan, Uzbekistan, Tajikistan and perhaps Afghanistan. It inhabits quite shallow flowing waters that are turbid and muddy.

<span class="mw-page-title-main">Main Turkmen Canal</span> Unfinished irrigation and navigation project between the Aral and Caspian Seas

The Main Turkmen Canal was a large-scale irrigation project in the Turkmen Soviet Socialist Republic. The canal was intended to transport water from the Amu Darya river to Krasnovodsk, a city in Turkmenistan on the coast of the Caspian Sea. The canal was going to use the course of the ancient dry Uzboy River bed.

<span class="mw-page-title-main">Kelteminar culture</span>

The Kelteminar culture was a Neolithic archaeological culture of sedentary fishermen occupying the semi-desert and desert areas of the Karakum and Kyzyl Kum deserts and the deltas of the Amu Darya and Zeravshan rivers in the territories of ancient Kazakhstan, Turkmenistan, and Uzbekistan.

Aral-Paygambar, which means the island of the prophet, is an island on the Amu Darya river which separates Uzbekistan and Afghanistan. The nature reserve was created in 1960 on the island of Aral-Paygambar on the Amu Darya river near Termez. The island has 3.1 hectares for conservation of riparian forests and the unique population of Bukhara deer. In all there are 150 species of plants, 21 species of mammals, 143 species of birds, 25 species of reptiles, and c. 35 species of fish. Many rare and endangered species, including large and small Amu Darya shovelnose, golden eagles, black storks, jungle cat, dressing, Asian otters, etc. In recent years, due to the reduction of floods and expansion households. activity in the floodplain degradation the national complex.

<span class="mw-page-title-main">Turkmenistan–Uzbekistan border</span> International border

The Turkmenistan–Uzbekistan border is the border between the countries of the Republic of Turkmenistan and the Republic of Uzbekistan. At 1,793 km (1,114m), it is Turkmenistan's longest border and Uzbekistan's second longest. The border runs from the tripoint with Kazakhstan to the tripoint with Afghanistan.

References

  1. 1 2 3 4 Mugue, N. (2010). "Pseudoscaphirhynchus hermanni". IUCN Red List of Threatened Species . 2010: e.T18600A8497165. doi: 10.2305/IUCN.UK.2010-1.RLTS.T18600A8497165.en . Retrieved 12 November 2021.
  2. "Appendices | CITES". cites.org. Retrieved 14 January 2022.
  3. Froese, R.; Pauly, D. (2017). "Acipenseridae". FishBase version (02/2017). Retrieved 18 May 2017.
  4. "Acipenseridae" (PDF). Deeplyfish- fishes of the world. Retrieved 18 May 2017.
  5. 1 2 "Pseudoscaphirhynchus hermanni (Kessler, 1877) Little Amu-Darya shovelnose". Fish Base. Retrieved 18 July 2013.
  6. "Pseudoscaphirhynchus Hermanni". Search Fish. Retrieved 18 July 2013.
  7. "Dwarf sturgeon". The Website of Everything. Retrieved 18 July 2013.

Sources