Diagnostic Description
provided by FAO species catalogs
Head with longitudinal depression dorsally. Snout short and fairly blunt. Snout and caudal peduncle subconical. Spiracle present. Gill membranes joined to isthmus. Mouth transverse. D:38-53; A:20-35. 11-16 dorsal scutes. 32-47 lateral scutes. 7-16 ventral scutes. Dorsal and lateral scutes with median longitudinal crest, without distinct spine. One small plate behind 4th to 7th dorsal scutes. Lateral scutes somewhat separate with one small plate anterior to first. 4 to 5 scutes behind dorsal fin. 3 scutes behind anal fin and two large ones anterior to it. Skin covered with fairly sparse, very small stellate platelets, among which are no large ones.
- Artyukhin, E.N. & A.E. Andronov - 1990. A morphological study of the Green sturgeon Acipenser medirostris (Chondrostei, Acipenseridae), from the Tumnin (Datta) River and some aspects of the ecology and zoogeography of Acipenseridae. J. Ichthyol. 30 (7): 11-21.
- Birstein V.J. & W.E.Bemis - 1997. How many species are there within the genus Acipenser? Environ. Biol. Fish. 48: 157-163.
- Bogutskaya, N. G & A. M. Naseka. - 1996. Cyclostomata and fishes of Khanka Lake drainage area (Amur Riber Basin) an annotated check-list with comments on taxonomy and zoogeography of the region. Gosniourku and Zin Ran. St. Petersburg. Fish. Khanka Lake. : 1-89. Ref ID: 22798
- Dulmaa, A. - 1999. Fish and fisheries in Mongolia. FAO Fisheries and Technical Paper. No. 385. Rome, FAO. pp. 187-236.
- Krykhtin, M.L. & V.G. Svirskii - 1997. Endemic sturgeons of the Amur River: kaluga, Huso dauricus, and Amur sturgeon, Aciperser schrenckii. Environm. Biol. Fish. 48:231-239.
- Lindberg, G.U & M.I. Legeza - 1965. Fishes of the Sea of Japan and adjacent areas of the Okhotsk and Yellow Seas. Pt.2: 1-391. Moscow, Leningrad
- Masuda, H, K. Amaoka, C. Araga, T. Uyeno & T. Yoshino - 1984. The fishes of the Japanese Archipelago. Tokai Univ. Press. Fish. Japanese Arch. Text: i-xxii + 1-437, Atlas: Pls. 1-370.
- Reshetnikov, Yu. S., N. G. Bogutskaya, D. E. Vasil'eva, E. A. Dorofeyeva, A. M. Naseka & et al. - 1997. An annotated Check-List of the freshwater fishes of Russia. J. Ichthyol. 37 (9):687-736.
- Wei, Q., F. Ke, J. Zhang, P. Zhuang, J. Luo, R. Zhou & W. Yang - 1997. Biology, fisheries, and conservation of sturgeons and paddlefish in China. Environm. Biol. Fish. 48: 241-255.
- Zhu, S.-Q. - 1995. Synopsis of freshwater fishes of China. Jiangsu Science and Technology Publishing House. i-v + 1-549. In Chinese, English summ.
- Zhuang, P., F. Ke, Q. Wei, X. He & Y. Cen - 1997. Biology and life history of Dabry's sturgeon, Acipenser dabryanus, in the Yangtze River. Environ. Biol. Fish. 48: 257-264.
Distribution
provided by FAO species catalogs
Endemic to the Amur River basin.
Size
provided by FAO species catalogs
Maximum size: about 3 m at an age of more than 60 years (Krykhtin & Svirskii, 1997)
Brief Summary
provided by FAO species catalogs
The Amur sturgeon is represented by two morphs: gray, common, and brown, rare. Young and adults of the brown morph inhabit the middle and lower reaches of the Amur River. The gray morph inhabits the Amur River basin from its upper reaches to the mouth, but they not enter in the sea.Zoobenthos: molluscs and larvae of the Arctic lamprey, Lampetra japonica. Most gray morphs individuals mature at an age of 10-14 years and females reproduce at least every four years. Both morphs begin to migrate to the spawning grounds in autumn. Spawning takes place in the spring on pebble depositsin the main river bed (Krykhtin & Svirskii, 1997). To Wei et al. (1997), males mature at age 7 to 8 years with a size of about 103 cm, while females mature at 9 to 10 years at about 105 cm TL and the spawning take place between May and July at water temperatures from 15º to 20º C.
Benefits
provided by FAO species catalogs
Commercial: highly prized fish. Endangered, on the verge of extinction in some areas. Now the lower Amur population of the Amur sturgeon comprises about 95.000 fish greater than age two years (Krykhtin & Svirskii, 1997).
Diagnostic Description
provided by Fishbase
Body shields in 5 rows; dorsal shields 11 to 15, lateral shields 32 to 47 and ventral 7 to 10.
Life Cycle
provided by Fishbase
The gray morph females in the Amur River reproduce at least every four years (Ref. 40142).
Migration
provided by Fishbase
Anadromous. Fish that ascend rivers to spawn, as salmon and hilsa do. Sub-division of diadromous. Migrations should be cyclical and predictable and cover more than 100 km.
Morphology
provided by Fishbase
Dorsal spines (total): 0; Dorsal soft rays (total): 38 - 53; Analspines: 0; Analsoft rays: 20 - 32
Trophic Strategy
provided by Fishbase
Occur in stretches of river with sandy or stony bottom. Feed on benthic organisms. Highly prized fish (Ref. 41072).
- Recorder
- Grace Tolentino Pablico
Biology
provided by Fishbase
Adults occur in stretches of rivers with sandy or stony bottom. Feed on benthic organisms. Highly prized fish (Ref. 41072).
Importance
provided by Fishbase
fisheries: commercial
Japanese sturgeon
provided by wikipedia EN
The Japanese sturgeon or Amur sturgeon (Acipenser schrenckii) is a species of fish in the family Acipenseridae found in the Amur River basin in China and Russia. Claims of its presence in the Sea of Japan need confirmation.[5] The species has 11–16 dorsal, 34–47 lateral, and 7–16 ventral scutes. Their dorsal fins have 38–53 rays and 20–35 anal fin rays. They also have greyish-brown backs and pale ventral sides. The species can reach up to 3 metres (9.8 ft) in length, and weigh over 190 kilograms (420 lb).[6] The species is considered to be critically endangered.[1]
Habitat and ecology
The Japanese sturgeon is benthic. Their main food sources are aquatic insect larvae, bony fish and mollusks. One study suggests that the type of aquatic insect larvae eaten by juvenile Japanese sturgeon depends on the season, where mayfly nymphs are eaten more frequently in spring and fall, and midge larvae are eaten more frequently in summer.[7] The females mature at 9–10 years of age, and males at 7–8 years. They start to migrate in the autumn. They live for 65 years.[6]
References
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^ a b Qiwei, W.; Mugue, N. (2022). "Acipenser schrenckii". IUCN Red List of Threatened Species. 2022: e.T228A146104223. doi:10.2305/IUCN.UK.2022-1.RLTS.T228A146104223.en. Retrieved 7 June 2023.
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^ "Appendices | CITES". cites.org. Retrieved 14 January 2022.
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^ Froese, R.; Pauly, D. (2017). "Acipenseridae". FishBase version (02/2017). Retrieved 18 May 2017.
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^ "Acipenseridae" (PDF). Deeplyfish- fishes of the world. Retrieved 18 May 2017.
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^ Froese, Rainer; Pauly, Daniel (eds.) (2013). "Acipenser schrenckii" in FishBase. January 2013 version.
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^ a b Description and distribution Archived 10 December 2013 at the Wayback Machine
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^ Li, Lei; Zhang, Ying; Zhang, Jinfeng; Ma, Bo (4 May 2020). "Seasonal variation in diet of juvenile Amur sturgeon Acipenser schrenckii in the lower reaches of the Songhua River, Northeast China". Journal of Applied Ichthyology. 36 (3): 275–281. doi:10.1111/jai.14041. ISSN 0175-8659. S2CID 218914637.
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Japanese sturgeon: Brief Summary
provided by wikipedia EN
The Japanese sturgeon or Amur sturgeon (Acipenser schrenckii) is a species of fish in the family Acipenseridae found in the Amur River basin in China and Russia. Claims of its presence in the Sea of Japan need confirmation. The species has 11–16 dorsal, 34–47 lateral, and 7–16 ventral scutes. Their dorsal fins have 38–53 rays and 20–35 anal fin rays. They also have greyish-brown backs and pale ventral sides. The species can reach up to 3 metres (9.8 ft) in length, and weigh over 190 kilograms (420 lb). The species is considered to be critically endangered.
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- cc-by-sa-3.0
- copyright
- Wikipedia authors and editors
