Significance of a floodplain in the formation of fish communities in small rivers of Ryazan oblast |
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Authors: | V P Ivanchev E Yu Ivancheva V G Tereshchenko |
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Institution: | 1.Okskii Biosphere State Nature Reserve,Brykin Bor, Ryazan oblast,Russia;2.Papanin Institute for Biology of Inland Waters,Russian Academy of Sciences,Borok, Yaroslavl oblast,Russia |
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Abstract: | In total, 37 fish species from 30 genera and 10 families are registered in small rivers of the Ryazan oblast. In addition
to other significant factors, the floodplain width is important for the formation of species structure of fish communities.
In the rivers with small floodplains (less than 0.2 km in width), mainly small and short-lived fishes are represented in the
catches. In the rivers or in their parts with wide floodplains (0.2–0.5 km), the dominant complex (in addition to short-lived
fish species) includes roach Rutilus rutilus and/or perch Perca fluviatilis. In the rivers with wider floodplains (more than 0.5 km), long-lived phytophils represented by mainly the limnophilous group
prevail. |
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