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Diagnostic Description

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Differs from its congeners in Indochina by the combination of the following characters: wide median incision in upper lip; distance between anus and anal fin origin 2.6-3.8 eye diameter; pelvic fin clearly reaching beyond anus; caudal fin deeply emarginate; body with 7-11 dark bars, wider than interspaces, regularly shaped and set, meeting their homologues on back; black bar at caudal-fin base complete, reaching dorsal and ventral midlines (Ref. 40772).
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Morphology

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Dorsal soft rays (total): 12; Analsoft rays: 8
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Biology

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Abundant in streams and rivers with gravel or rocky substrate and high water velocities (Ref. 40772). Resistant to organic pollution and can survive in streams that flow through villages and towns and exhibit strong signs of human perturbation (Ref. 40772). Most abundant in riffles and rapids with current velocities more than 1 m/s below the surface (Ref. 40772). Found in small high gradient rivers and small mountain streams, as well (Ref. 40772). Often associated with Poropuntius sp., Annamia normani, Schistura dalatensis and Glyptothorax laosensis (Ref. 40772).
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Schistura yersini

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Schistura yersini is a species of ray-finned fish, a stone loach, in the genus Schistura which is found in two mountain rivers near Dalat in Vietnam. The species is abundant in steep, streams and rivers which have a gravel or rocky substrate and fast current. It is resistant to organic pollution and human disturbance of its habitat and is able to persist in streams flowing through settlements. It is most common in riffles and rapids where the water flow is greater than 1 metre per second below the surface.[1] The specific name honours the Swiss biologist and humanist Alexandre Yersin (1863-1943), who spent a great deal of his life working around Dalat near where the original type of this species was collected.[2]

References

  1. ^ a b Froese, Rainer; Pauly, Daniel (eds.) (2017). "Schistura yersini" in FishBase. October 2017 version.
  2. ^ "Order CYPRINIFORMES: Family NEMACHEILIDAE (Stone Loaches)". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. 2017. Retrieved 21 January 2018.
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Schistura yersini: Brief Summary

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Schistura yersini is a species of ray-finned fish, a stone loach, in the genus Schistura which is found in two mountain rivers near Dalat in Vietnam. The species is abundant in steep, streams and rivers which have a gravel or rocky substrate and fast current. It is resistant to organic pollution and human disturbance of its habitat and is able to persist in streams flowing through settlements. It is most common in riffles and rapids where the water flow is greater than 1 metre per second below the surface. The specific name honours the Swiss biologist and humanist Alexandre Yersin (1863-1943), who spent a great deal of his life working around Dalat near where the original type of this species was collected.

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