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Biology of Amur sleeper (Perccottus glehni) in the Delta of the Selenga River, Buryatia, Russia

Journal of Great Lakes Research

By:
and
DOI: 10.1016/S0380-1330(96)70962-0

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Abstract

We determined the fecundity, growth, diet, and density of the Amur sleeper (Perccottus glehni) in the Selenga River Delta on Lake Baikal during 1986-1991 to better understand how this invading exotic will affect Baikal's endemic fishes. We also compared the Amur sleeper's diet with that of other fishes living in the delta. The largest Amur sleepers were about 200 mm long and weighed 200 g; the oldest were age 7. All females were mature at age 2. Fecundity ranged from 884 eggs at age 1 to 37,056 eggs at age 7. Highest densities of Amur sleepers were found in oxbow lakes where densities sometimes exceeded 4,000 fish per ha. The bulk of the diet of Amur sleeper age 2 and older was chironomids, fish, and fish eggs. Chironomids were also important in the diet of the commercially valuable Siberian roach (Rutilus rutilus lacustris) and Siberian dace (Leuciscus leuciscus baicalensis). Thus the Amur sleeper may cause population declines of these important endemic fishes through resource competition and predation on their juvenile life stages. However, Amur sleepers were the species of fish most frequently eaten by Eurasian perch (Perca fluviatilis) and northern pike (Esox lucius). So, maintaining vigorous populations of these two predators may well be an effective strategy for limiting the size of Amur sleeper populations.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Biology of Amur sleeper (Perccottus glehni) in the Delta of the Selenga River, Buryatia, Russia
Series title:
Journal of Great Lakes Research
DOI:
10.1016/S0380-1330(96)70962-0
Volume
22
Issue:
2
Year Published:
1996
Language:
English
Publisher:
Elsevier
Publisher location:
Amsterdam, Netherlands
Contributing office(s):
Great Lakes Science Center
Description:
9 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Great Lakes Research
First page:
370
Last page:
378
Country:
Russia
Other Geospatial:
Lake Baikai;Selenga River