Chinese sleeper

Chinese sleeper
	Chinese sleeper in aquarium
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Gobiiformes
Family:	Odontobutidae
Genus:	Perccottus
Species:	P. glenii
Binomial name
	Perccottus glenii; Dybowski, 1877
	The range of the Chinese sleeper (native in green; introduced in red)[1]
Synonyms
	Eleotris dybowskii Herzenstein & Warpachowski, 1887; Eleotris pleskei Warpachowski, 1887;

The Chinese sleeper (Perccottus glenii), also known as the Amur sleeper, is a species of freshwater sleeper native to Amur River basin in eastern Asia with introduced populations in other regions of Eurasia. It is currently the only known member of its genus.[2]

Description

The head of the Chinese sleeper

The invasive Chinese sleeper from the region of Vinnytsia, Ukraine

The Chinese sleeper, known as rotan in Russia, resembles a perch, ruffe or sculpin. The eyes are placed high on the head which has a rounded snout and projecting lower jaw. There is little or no gap between the two dorsal fins, the front one of which has six to eight spines and the back one nine to eleven soft rays. The anal fin has one to three spines and seven to ten soft rays. The pelvic fins are not fused together which helps to distinguish this fish from the gobies. The second dorsal and the anal fins are both more rounded and shorter than the gobies and the caudal fin is also more rounded. The general colour is brownish with a checker-board pattern of darker marks or dark barring. There are dark lines on the head radiating from the eye.[3] This species can reach a length of 25 centimetres (9.8 in) TL and the greatest recorded weight for a specimen is 250 grams (8.8 oz).[2]

Distribution and habitat

The Chinese sleeper is native to the Far East but appeared in ponds in Eastern Europe in the early twentieth century and has since spread to large parts of the Danube, the Vistula and other river basins where it is considered an invasive species.[4] Its typical habitat is ponds, closed water-bodies and slow-moving streams.[3] The westernmost locality of the Chinese sleeper range is the ponds in the Bavarian Danube basin in Germany.[5][6]

Behaviour

The Chinese sleeper is an adaptable species and tolerant of widely different conditions.[4] It feeds on insects and their larvae, small crustaceans and fish fry. It spawns in warm shallows among vegetation and the male guards the eggs.[3]

Economic importance

This species is of minor importance to local commercial fisheries and has potential as an aquarium fish. However, introduced populations are of concern as they could become detrimental to the local fauna due to its predatory nature and voracious appetite.[2]

gollark: Probably not that many? I'd assume lots of people photograph geese and then post it to social media or just store it locally. The dataset presumably only contains ones which someone submits.

gollark: Web crawlers and a goose classifier.

gollark: (I have VPSes with little storage and fast network connectivity, and my server with lots of storage but a slow network, but nothing with a fast network and lots of storage)

gollark: I might actually be able to store and index them, then.

gollark: Huh, I had estimated 200GB.

References

Reshetnikov A.N., 2010. The current range of Amur sleeper Perccottus glenii Dybowski, 1877 (Odontobutidae, Pisces) in Eurasia. Russian Journal of Biological Invasions. 1(2): 119-126.
Froese, Rainer and Pauly, Daniel, eds. (2014). "Perccottus glenii" in FishBase. February 2014 version.
"Chinese sleeper". NatureGate. Retrieved 2013-12-26.
Lukina, I. I. (2011). "Distribution of the Amur sleeper (Perccottus glenii Dybowski, 1877) in Belarus". Russian Journal of Biological Invasions. 2 (2–3): 209–212. doi:10.1134/S2075111711030088.
Reshetnikov A.N., Schliewen U.K. (2013) First record of the invasive alien fish rotan Perccottus glenii Dybowski, 1877 (Odontobutidae) in the Upper Danube drainage (Bavaria, Germany). Journal of Applied Ichthyology, 29: 1367–1369.
Nehring S., Steinhof J. (2015) First records of the invasive Amur sleeper, Perccottus glenii Dybowski, 1877 in German freshwaters: a need for realization of effective management measures to stop the invasion. BioInv. Rec., 4: 223-232.

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[1] Reshetnikov A.N., 2010. The current range of Amur sleeper Perccottus glenii Dybowski, 1877 (Odontobutidae, Pisces) in Eurasia. Russian Journal of Biological Invasions. 1(2): 119-126.

[FishBase-2] Froese, Rainer and Pauly, Daniel, eds. (2014). "Perccottus glenii" in FishBase. February 2014 version.

[NatureGate-3] "Chinese sleeper". NatureGate. Retrieved 2013-12-26.

[Lukina-4] Lukina, I. I. (2011). "Distribution of the Amur sleeper (Perccottus glenii Dybowski, 1877) in Belarus". Russian Journal of Biological Invasions. 2 (2–3): 209–212. doi:10.1134/S2075111711030088.

[5] Reshetnikov A.N., Schliewen U.K. (2013) First record of the invasive alien fish rotan Perccottus glenii Dybowski, 1877 (Odontobutidae) in the Upper Danube drainage (Bavaria, Germany). Journal of Applied Ichthyology, 29: 1367–1369.

[6] Nehring S., Steinhof J. (2015) First records of the invasive Amur sleeper, Perccottus glenii Dybowski, 1877 in German freshwaters: a need for realization of effective management measures to stop the invasion. BioInv. Rec., 4: 223-232.