Comparative analysis of fish aggregation in channel depressions of the Irtysh

We present the results of ichthyological studies in principal channel depressions of the Irtysh developing the notions on polyfunctional biological role of these formations. The study is made by means of a computerized hydroacoustic complex “Askor”. Quantitative estimation of the size composition, a...

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Bibliographic Details
Published inJournal of ichthyology Vol. 48; no. 11; pp. 919 - 936
Main Authors Pavlov, D. S., Mochek, A. D., Borisenko, E. S., Degtev, A. I., Degtev, E. A.
Format Journal Article
LanguageEnglish
Published Dordrecht SP MAIK Nauka/Interperiodica 01.12.2008
Subjects
Biomedical and Life Sciences
Life Sciences
Zoology
Size Composition
Late Autumn
Early Summer
Water Area
Maximum Density
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Summary:We present the results of ichthyological studies in principal channel depressions of the Irtysh developing the notions on polyfunctional biological role of these formations. The study is made by means of a computerized hydroacoustic complex “Askor”. Quantitative estimation of the size composition, abundance, density, and spatial distribution of fish on water area of channel depressions in different seasons confirms the hypothesis of multifaceted biological significance of these formations. Universal traits in the organization of fish aggregations, specificity of distribution, composition, and seasonal dynamics of the fish population on the largest channel depressions of the Irtysh are revealed.
ISSN:0032-9452
1555-6425
DOI:10.1134/S0032945208110015