ISSN 0869-6632 (Print)
ISSN 2542-1905 (Online)

For citation:

Last E. V., Frisman E. Y. Craft influence оn population dynamics of anadrom fishes. Izvestiya VUZ. Applied Nonlinear Dynamics, 2002, vol. 10, iss. 1, pp. 157-169. DOI: 10.18500/0869-6632-2002-10-1-157-169

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Language: 
Russian
Heading: 
Nonlinear Dynamics in Action
Article type: 
Article
UDC: 
574.3
DOI: 
10.18500/0869-6632-2002-10-1-157-169

Craft influence оn population dynamics of anadrom fishes

Autors: 
Last Elena Valerevna, Institute of Automation and Control Processes, FEB RAS (IASP FEB RAS)
Frisman Efim Yakovlevich, Institute for Complex Analysis of Regional Problems of Russian Academy of Sciences, Far Eastern Branch
Abstract: 

The following mathematical model (recurrent equation with time lag) for describing of the non-uniform anadrom fish population number dynamics is suggested. Conditions causing regular and chaotic fluctuations in the system were found. The influence of two different craft methods оn the population dynamics is investigated. It is supposed that volume of a craft depends on trade efforts and current value of number. It is shown that if the value оf trade efforts depends оn number nonlinearly then intensification of such craft inevitably brings the population either into oscillation (or chaotic) regim or to degeneration. 

Key words: 
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Acknowledgments: 
The work was supported by the Russian Foundation for Basic Research (grant No. 99-01-00633).
Reference: 
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Received: 
18.02.2001
Accepted: 
20.07.2002
Available online: 
14.12.2023
Published: 
31.07.2002
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