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Моделирование динамики запаса колючего краба Paralithodes brevipes южных Курильских островов конечно-разностной моделью с запаздыванием

Моделирование динамики запаса колючего краба Paralithodes brevipes южных Курильских островов конечно-разностной моделью с запаздыванием

Abstract

The information on fishery object limited by CPUE data and fragmentary data on age and size is sufficient for production models. However, this type of models is improper for long-living species, as crabs, because of problem with assumption on equilibrium stock. Describing dynamics of a single year-class, these models average the parameters for all generations that impedes to use them for assessment of crabs stocks. Finite-difference models with delay are more promising in this case. Deriso-Snute finite-difference model with delay was used for simulating of the spiny king crab biomass dynamics at southern Kuril Islands and forecasting of TAC for this species. Parameters of the model were estimated using the algorithm of sampling by scheme of Markov chain. The model is relatively simple and undemanding to data time-series of commercial catch per effort is sufficient for its simplest version. Results of modeling are comparable with the results of cohort models.

Достаточно часто информация об объекте ограничена данными промысловой статистики и фрагментарными материалами мониторинга. Такой материал достаточен для применения продукционных моделей. Однако эти модели плохо применимы к длинноцикловым объектам, таким как крабы и крабоиды. Более перспективным является применение конечно-разностных моделей с запаздыванием. Для моделирования динамики биомассы запаса нами была использована конечно-разностная модель с запаздыванием Деризо-Шнютэ, которая относительно проста и нетребовательна к данным. Тем не менее результаты, полученные с ее помощью, сопоставимы с результатами когортных моделей.

Keywords

КУРИЛЬСКИЕ ОСТРОВА,ОЦЕНКА ЗАПАСА,МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ,КОНЕЧНО-РАЗНОСТНАЯ МОДЕЛЬ С ЗАПАЗДЫВАНИЕМ,КОЛЮЧИЙ КРАБ,KURIL ISLANDS,STOCK ASSESSMENT,MODELING,DELAY-DIFFERENCE MODEL,SPINY KING CRAB

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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