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Vestnik Samarskogo Universiteta. Estestvenno-Nauchnaya Seriya, 2016, Issue 1-2, Pages 92–106 (Mi vsgu505)  

This article is cited in 3 scientific papers (total in 3 papers)

Biology

Nonlinear model of overfishing for the Volga sturgeon based on cognitive graph of interaction of environmental factors

A. Yu. Perevaryukha

St. Petersburg Institute for Informatics and Automation of the Russian Academy of Sciences, 39, 14 Line, Saint Petersburg, 199178, Russian Federation
Full-text PDF (395 kB) Citations (3)
(published under the terms of the Creative Commons Attribution 4.0 International License)
References:
Abstract: We have discussed the development of models of dynamics of formation of reserves juveniles from natural spawning sturgeon Acipenser gueldenstaedtii of the Caspian Sea on historical data. Working hypotheses are based on the graph conceptual scheme aimed chain links. Structuring multivariate analytical conclusions about the quality of the interaction of 12 natural and anthropogenic factors in the ecosystem of the Caspian Sea have allowed us to recharge from the general ideas of the theory on to describe the specific situation of the tragic consequences of overfishing of anadromous fish with a long lifecycle. Reducing the word was swiftly enough and not consistent with the expectations of the replenishment of stocks by artificial reproduction. Dedicated contact circuit pulse propagation cognitive digraph where arcs contains the power of influence, says an indirect strengthening of action depends on the density of mortality. Interestingly, the relationship did not have a permanent independent sign «+» or «-». Recessions manifested dramatically on both boundaries of the range of optimum number of spawning manufacturers. Perhaps the decline in the efficiency of the reproduction right of the balance associated with the migration routes overlap. It is more intense withdrawal of fish more prolific race hibernating until spring in the river. The model takes into account the additional effect of increasing variations in the pace of development of the size on the survival of migrating hatchery. The system of differential equations is investigated in an iterative discrete continuous hybrid form with alternative position of equilibrium trajectory. One of the equilibrium is unstable, and is the starting point for the degradation of reproductive activity. The proposed model of reproduction under supercritical level seizures shows subtle transition from the brink of fading fluctuation to the permanent historical perspective depletion, the way into the Red Book.
Keywords: graph models in ecology, cognitive structuring of factors, unstable population processes, interpretation of nonlinear effects, effect of fish growth rate, unstable equilibrium and cycles, interpretation of overfishing of stocks, hybrid systems.
Funding agency Grant number
Russian Foundation for Basic Research 15-07-01230_а
The work is performed with the support of Russian Foundation for Basic Research, grant № 15-07-01230 leader prof. V. Mikhailov.
Received: 03.03.2016
Bibliographic databases:
Document Type: Article
UDC: 519.171, 573.22
Language: Russian
Citation: A. Yu. Perevaryukha, “Nonlinear model of overfishing for the Volga sturgeon based on cognitive graph of interaction of environmental factors”, Vestnik SamU. Estestvenno-Nauchnaya Ser., 2016, no. 1-2, 92–106
Citation in format AMSBIB
\Bibitem{Per16}
\by A.~Yu.~Perevaryukha
\paper Nonlinear model of overfishing for the Volga sturgeon based on cognitive graph of interaction of environmental factors
\jour Vestnik SamU. Estestvenno-Nauchnaya Ser.
\yr 2016
\issue 1-2
\pages 92--106
\mathnet{http://mi.mathnet.ru/vsgu505}
\elib{https://elibrary.ru/item.asp?id=29345221}
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  • https://www.mathnet.ru/eng/vsgu/y2016/i1/p92
  • This publication is cited in the following 3 articles:
    Citing articles in Google Scholar: Russian citations, English citations
    Related articles in Google Scholar: Russian articles, English articles
    Вестник Самарского государственного университета. Естественнонаучная серия
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