| 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. |
| Genre: | Article |
| ProdID: | 1000771 |
| Citation Author: | Litvinov, Alexander G.; O'Gorman, Robert |
| Citation Contributing Office: | Great Lakes Science Center |
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| Citation End Page: | 378 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Great Lakes Research |
| Citation LatN: | 52.412472 |
| Citation LatS: | 51.912085 |
| Citation LonE: | 106.861267 |
| Citation LonW: | 106.22406 |
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| Citation No Pagination: | |
| Citation Number Of Pages: | 9 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | 9 p. |
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| Citation Public Comments: | |
| Citation Publisher: | Elsevier |
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| Citation Search Results Text: | Biology of Amur sleeper (Perccottus glehni) in the Delta of the Selenga River, Buryatia, Russia; 1996; Article; Journal; Journal of Great Lakes Research; Litvinov, Alexander G.; O‘Gorman, Robert |
| Citation Start Page: | 370 |
| Citation Volume: | 22 |
| Citation Year: | 1996 |
| Type: | citation/reference |
| Text: | Biology of Amur sleeper (Perccottus glehni) in the Delta of the Selenga River, Buryatia, Russia; 1996; Article; Journal; Journal of Great Lakes Research; Litvinov, Alexander G.; O‘Gorman, Robert |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/S0380-1330(96)70962-0 |
| Date Other: | Mon, 1 Jan 1996 00:00 -0600 |
| Publisher: | Elsevier |
