Overview

Distribution

Eastern Asia.
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Asia: China and Korea. Europe: Russia.
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Eastern Asia.
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Physical Description

Morphology

Dorsal spines (total): 2; Dorsal soft rays (total): 13; Analspines: 2; Analsoft rays: 10
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Size

Maximum size: 105 mm TL
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Max. size

12.0 cm TL (male/unsexed; (Ref. 12218))
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Ecology

Habitat

Amur River Benthopelagic Habitat

This taxon is one of a number of benthopelagic species in the Amur River system. Benthopelagic river fish are found near the bottom of the water column, feeding on benthos and zooplankton

The persistence of mercury contamination in Amur River bottom sediments is a major issue, arising from historic cinnabar mining in the basin and poor waste management practises, especially in the communist Soviet era, where industrial development was placed ahead of sound conservation practises.

Other large benthopelagic river fish of the Amur Basin is the 200 cm yellowcheek (Elopichthys bambusa) and the 122 cm Mongolian redfin (Chanodichthys mongolicus)

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Yangtze River Benthopelagic Habitat

This taxon is one of a number of benthopelagic species in the Yangtze River system. Benthopelagic fish inhabit the water column niche immediately above the bottom, feeding on benthos and zooplankton.

The upper Yangtze basin consists chiefly of Paleozoic limestone and terrigenous sedimentary rock, with some granitic material. The most downstream element of the upper Yangtze basin is often termed the Sichuan Basin; here the Yangtze cuts through Triassic and Permian material before entering the Three Gorges. The Three Gorges area is a stretch of the Yangtze that runs approximately 660 kilometers, terminating at the site of the Three Gorges Dam. Prior to construction of the dam, the Three Gorges area was a site of exceptional natural beauty; after dam construction the gorge areas were filled with approximately 100 meters in depth of Yangtze water, and considerable amounts of the watershed were graded.

The lower Yangtze basin consists of anabranching river structures and Pleistocene coastal terraces. Prior to development of the Three Gorges Dam, the Yangtze Delta was replenished with a copious sediment load reaching the river mouth; however, the dam has now severely limited the natural flow and deposition of sediment to the delta region. Consequently, the integrity of the delta is been compromised, with scouring exceeding deposition, and the very stability of the delta is endangered.

Lower and middle basins of the Yangtze carry heavy pollutant loads. In the lower Yangtze basin nitrate levels are high, measuring at about 1000 tons per day at Datong; these levels accrue from high applications of chemical fertilizer applied and also considerable loadings of untreated sewage due to the large human population of the basin, with correspondingly little infrastructure for sewage treatment.

Heavy metal concentrations are also high in the lower Yangtze, with measurements of dissolved lead at 0.078 microgram/liter; cadmium (0.024 microgram/liter), chromium (0.57 microgram/liter), copper (1.9 microgram/liter), and nickel (0.50 microgram/liter). Levels of dissolved arsenic have been measured at 3.3 microgram/liter) and zinc at 1.5 microgram/liter), both notably higher by factors of 5.5 and 2.5 respectively than other typical large world rivers. In Yangtze River suspended sediment, arsenic comprises 31 microgram/gram, lead comprises 83 microgram/gram, and nickel comprises 52 micrograms/gram of sediment content

A number of other benthopelagic associates are found in the Yangtze, including: Anabarilius polylepis, Bangana rendahli, Pseudogyrinocheilus prochilus, Sinocyclocheilus grahami and Siniperca roulei. The demersal fish Silurus meridionalis also is found as a Yangtze River endemic species.

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Environment

benthopelagic; freshwater; pH range: 7.0; dH range: 15
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Life History and Behavior

Life Cycle

Female has an ovipositor which is used to deposit eggs inside bivalves. Young remain in the bivalve until they can swim (Ref. 43281).
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Acanthorhodeus gracilis

The following is a representative barcode sequence, the centroid of all available sequences for this species.


No available public DNA sequences.

Download FASTA File
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Statistics of barcoding coverage: Acanthorhodeus gracilis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 4
Specimens with Barcodes: 4
Species With Barcodes: 1
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Statistics of barcoding coverage: Acheilognathus chankaensis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 1
Species With Barcodes: 1
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Conservation

Threats

Not Evaluated
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Relevance to Humans and Ecosystems

Benefits

Importance

aquarium: commercial
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Wikipedia

Khanka spiny bitterling

The Khanka spiny bitterling (Acanthorhodeus chankaensis) is a temperate freshwater fish belonging to the Acheilognathinae subfamily of the Cyprinidae family. It originates in the inland rivers in Asia, and is found in China, Korea, and Russia. It is currently the only known species in its genus.

The fish will grow in length up to 12 centimetres (4.7 in) TL. It lives in a temperate climate in water with a pH of 7.0, a hardness of 15 DH, and a temperature range of 18 to 22°C (64 to 72°F). It is of commercial importance for fisheries and public aquariums.[1]

When spawning, the female deposits the eggs inside bivalves. The young hatch and remain within the bivalve until they can swim.

References [edit]

  1. ^ Froese, Rainer and Pauly, Daniel, eds. (2013). "Acanthorhodeus chankaensis" in FishBase. February 2013 version.
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