Mikhail Piatinskii

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• Doctor of Philosophy
• Ex. chief at All-Russian Research Institute Fisheries and Oceanography

The abundance of the Russian sturgeon population in the Sea of Azov declined many times in the XX–XXI centuries. This paper presents long-term annual and spatial occurrence datasets to create statistical and machine learning models to better understand the distribution patterns as well as biological and ecological features. The annual dataset provi...

As a result of the collapse of the populations of Russian sturgeon and stellate sturgeon in the Sea of Azov in the late 1990s, their numbers were at an extremely low level. Since 2015, there has been a moderate trend towards an increase in the populations of Russian sturgeon and stellate sturgeon due to an increase in artificial reproduction and in...

The new approach to cohort modeling of fish populations in conditions of artificial reproduction, taking into account the possibilities of the reservoir’s food supply, was presented. The combined modeling approach includes the advantages of traditional cohort modeling of population dynamics and a hydrobiological approach to assessing the carrying c...

Показана значимая положительная связь между уловами анчоуса в северо-западной части Чёрного моря и температурой поверхности воды: среднегодовой (с задержкой в 1 год, rs = 0,50) и среднезимней (без сдвига, rs = 0,42). Установлены положительные тренды в изменениях среднегодовых и среднезимних значениях температуры поверхности моря. Отмечено наличие з...

A novel approach to gobies stock assessment based on training an artificial intelligence model using long-term historical ecosystem data was proposed. This research uses data from the historical archive for annual parameters of the Azov Sea ecosystem, including the Don River flow volume, water salinity, zoobenthos relative biomass, sander catches,...

Новизна: представлены материалы о состоянии естественного воспроизводства осетровых рыб в р. Дон после зарегулирования стока, показаны темпы снижения выживаемости поколений русского осетра и севрюги под влиянием ННН-вылова. По результатам исследования генотипов особей русского осетра подтверждены миграции азовских осетровых рыб в Чёрное море, а так...

The northamerican crab Rhithropanopeus harrisii (Gould, 1841) was first recorded in the Sea of Azov in1948. The species spread rapidly elsewhere over the sea and became one of the common representatives ofits benthic fauna. We have pooled the data across all the long-term observations over the Sea of Azov pop-ulations of the Harris crab conducted b...

В результате изменения условий обитания в Азовском море применение классической реализации площадного метода в последние годы является затруднительным. Представлена модифицированная доработка площадного метода оценки запасов водных биоресурсов на основе процедуры непараметрического бутстрепа. Апробация нового способа расчёта выполнена относительно...

Европейский (черноморский) шпрот (Sprattus sprattus phalericus (Risso, 1827)) –наиболее массовый представитель пелагического сообщества рыб Чёрногоморя. Исследование биологических особенностей и способов промышленного рыболовстваэтого вида началось в 1950-х гг. по мере сокращения доступности для промысла болееценных видов рыб (Асланова, 1954; Домаш...

Recently driven changes in habitat conditions in the Azov Sea make classic applications of swept area method inconsistent. Swept area stock assessment method modification for stock estimation of aquatic biological resources through nonparametric bootstrap is presented. New approach is tested against classic calculated results of swept area method f...

The combined stock assessment approach to estimate and forecast the biomass and fisheries of the gobies population in Azov Sea are presented. Biomass stock assessment during the period 2015–2022 performed based on Pella-Tomlinson surplus production model within aprior parametrization by JABBA package. In terms of change the control parameter (from...

Background. The Chogray Reservoir is a large artificial water body in the south of Russia, which is used for commercial fisheries. Relevance. The investigation of the spatio-temporal variability of the main biological parameters of this reservoir and identification of its trophic status is of immediate importance due to the currently observed incre...

Based on the available biological and fisheries data, stock status review for 18 units of the fish species inhabiting the Black Sea and the both Azov and Black Seas is presented. A modified version of the traditional approach to the harvest control rules for the aquatic bioresources of the Azov and Black Sea Fishery Basin is described for the case...

At present, the Azov Sea ecosystem exists in the context of continuously decreasing continental runoff and increasing water salinity, which reached in 2020-2021 the highest values for the entire period of observations since 1962. The increase in water salinity inevitably leads to the transformation in the composition of biological communities, whic...

Полученные результаты моделирования свидетельствуют о допустимой эксплуатации крымско-кавказской единицы запаса шпрота на уровне 18–20 тыс. т в период 2023–2024 г. Однако наблюдаемая в последние 5 лет тенденция сокращения числа судов в совокупности с возможным повторением в прогнозируемом периоде неблагоприятных условий ведения промысла шпрота, вкл...

Arctic Ocean is large and important ecosystem. Growth of human impact in last decades of XXI century leads to significant changes in different environmental variables. Main goal of this research was analysis of spatio-temporal structure of Arctic Ocean ecosystem to find main causes of its changing and impact on Arctic transportation system. For ana...

Представлены результаты анализа многолетних данных научного мониторинга состояния популяции тюльки и показателей солености в Азовском море. Многолетний анализ показал наличие значимой отрицательной связи между продуктивностью запаса тюльки и изменениями показателей солености и отсутствие связи между средней численностью личинки в Таганрогском залив...

Long-term data collected in the proccess of scientific monitoring of commercial fisheries in the Kerch channel of the Black-Azov sea pontic shad in period 2004–2020 was analyzed. Static and dynamic parameters of population was evaluated. Von Bertalanffy growth model parameters estimated: Linf = 32,0 cm, K = 0,31, t0 = -2,09. Age and weight cohort s...

— A new model describing the dynamics of sturgeon (Acipenseridae) population unable to recover or ranked as depleted is proposed as a depleted artificially-stocking population (DAP) model. The model composed of two submodels is implemented in the R language. One of the submodels provides the opportunity to adjust the appropriate parameters used in...

The Black Sea sprat Sprattus sprattus phalericus (Risso) and temperature factor impact have been investigated. Statistical assessment of the long-term dynamics (1951–2019) of a relationship between the temperature factor and sprat mean weight in fishery catches used as a population quality characteristic has been performed. Pearson product-moment c...

Предлагается новая модель популяции осетровых рыб, естественное воспроизводство которой отсутствует либо чрезвычайно мало. Модель, получившая название DAP (Depleted Artificial Population model), реализована в среде R и состоит из двух подмоделей. Первая подмодель позволяет уточнить необходимые параметры модели (коэффициент естественной убыли полово...

The population biomass, fishing mortality dynamics and reference points of the rational exploitation of the Black-Azov sea shad during the period 2004-2020 were evaluated using the JABBA surplus production model in “catch-only” version. IUU estimation and preliminary parametrization by CMSY model was performed to improve assessment accuracy. Accord...

Turbot is one of the most valuable fish species in the Black Sea commercial fishery. The serious, dramatic depletion of the turbot stock and catches that began in the 1980s was caused by overfishing and poor ecological conditions. The state of the turbot stock began to improve in the northwestern part of the Black Sea in 2016. Landings were at thei...

Turbot is one of the most valuable fish species for the commercial fishery in the Black Sea. A serious and dramatic depletion of the turbot stock and catches began in the 1980s due to overfishing and negative ecological situation. The state of the turbot stock has started to improve in the northwestern part of the Black Sea since 2016. The landings...

This study performs approbation of trend CMSY model on the example of Black sea sprat fishing unit, localized in Russian waters. Data sources has been reduced to the level of data limited modeling for indicator and trend models approach. CMSY population model results were compared with previously performed estimations by more powerful cohort model...

Stock assessment of vimba population Vimba vimba (Linnaeus, 1758) in period 2015–2020 was performed by qualitative indicator method LBI (Length-Based Indicators) that allows to assess qualitative characteristics of the population and fisheries and MSY biological reference points. The indicator, qualitative approach to stock assessment was applied d...

Косвенная методика оценки объемов ННН-промысла в Азово-Черноморском бассейне. Аппроксимация нелинейной функции. Корректировочный коэффициент для официального промысла.

Рассмотрены методы математического моделирования динамики численности популяций, применяемые в Азово-Черноморском бассейне. Когортные модели I-информационного уровня, продукционные модели II-информационного уровня, трендовые и индикаторные методы III-информационного уровня.

Назначением программы является выполнение интегрированного экосистемного анализа методом главных компонент при помощи сингулярного разложения ковариационных матриц и генерации результирующего отчета в формате html. Область применения программы – рыбохозяйственная наука, экология. Программа применяется для процедуры экосистемного анализа и оценки во...

Назначение программы заключается в выполнении всех этапов популяционного анализа при помощи метода extended survivor analysis для процедуры обоснования допустимого вылова рыб и построении результирующего отчета в формате html. Область применения программы – рыбохозяйственная наука. Программа применяется для определения параметров популяции и расчет...

По результатам выполненной работы [Пятинский и др., 2020], рис. 1, наглядно видно, что период с 1951 до 1972 года был неблагоприятным для за-паса шпрота на фоне низкого уровня эксплуатации. Начиная с 1973 года наступил бла- гоприятный период для запаса шпрота, который продлился до 1990х годов с крат- косрочными снижениями запаса в 1981-1982 гг. В п...

Preliminary study of integrated ecosystem assessment was shown for Russian waters of the Black sea, performed by PCA. Hierarchical clusterization and regime shift detection by method Rodionov was performed. Two ecosystem regime shifts was detected: in 2003-2004 and 2009-2010 years. First regime shift occured by zooplankton biomass high-gain. Perhap...

The data collected during the scientific monitoring of the spawning run of roach Rutilus rutilusheckelii and common bream Abramis brama in the Don River have been analyzed. Investigation of thebiological characteristics, spatial distribution and specific features of the downward migration of fishjuveniles was carried out in the Lower Don area stret...

Preliminary study of impact of temperature factor to sprat quality characteristics in Russian waters of the Black sea in period 1951–2019 was performed. In this research statistical hyphothesis about relationship between indicator sea surface temperature factor near to Chernomorskoe, Yalta, Feodosia and long-term sprat mean weight fishery statistic...

For analytical assessment of the so-iuy mullet Planiliza haematocheila in the Azov Sea, the archive materials of YugNIRO and AzNIIRKH have been used, as well as published expert estimates of IUU-fishing and fishing statistics of the Russian Federation and Ukraine for 1996–2019. Assessment was conducted based on XSA cohort model in the FLR software...

Stock assessment of the European sprat Sprattus sprattus phalericus, localized in the waters off the shores of the Crimean Peninsula and Caucasus, has been performed for 1994–2019, using XSA cohort model in FLR package in R. The current state of the system «stock–exploitation» for the sprat in Russian waters of the Black Sea is characterized by sli...

Stock assessment of Azov sea roach Rutilus rutilus (Linnaeus, 1758) has been performed by CMSY model in period 1999-2019 by data-limited modelling in R. The current population status – in biological safe zone for stock biomass and no overfishing signals (B2019/BMSY = 1,32, F2019/FMSY = 0,53). Perhaps, current paper results can be a slightly incompl...

The paper presents the results of monitoring the process of migration and fishing of the Azov khamsa in April-May and October-November, 2019. The research used daily maps of sea surface temperature (SST) of the Black and Azov seas, built in the hydrometeorological Center of Russia according to NCDC/NOAA (Operational module Yessim - hmc.meteorf.ru/s...

The problem of estimation of the true value of the length at which 50 % of fish or crustacean individuals are sexually mature is considered for the case when maturity indicators are absent in a part of mature individuals. As a means to solve this problem, it is proposed to use three-parameter models similar to traditionally used two-parameter ones,...

Stock assessment methods for the high priority and other aquatic biological resources of the Azov and Black Sea Fishery Basin, applied in the Azov-Black Sea Branch FSBSI “VNIRO” (“AzNIIRKH”) in 2019, are reviewed. Features of evaluation of the biological reference points and justification for “Harvest control rules” in the Basin are described. Fish...

Black sea turbot (Scophthalmus maeotica maeotica) stock assessment results by surplus production models. Results shows no significant overfishing signals. Short-term forecast performed: TAC in 2020 should be at level 329 t.

The data on length and age composition of the Black Sea turbot Scophthalmus maeoticus (Pallas), as well as its catches, fishing intensity and some biological characteristics in the Russian waters of the Black Sea and around the Crimean Peninsula are presented for the period of 2000–2018. As the result of consideration of fishery and biological char...

БиоСтатистика – программно-аппаратный комплекс, предназначенный для хранения, отображения и анализа рыбопромысловых данных. Решение задачи автоматической обработки и накопления рыбохозяйственных данных при помощи современных систем СуБД и программной реализации интерфейсов взаимодействия.

Stock assessment methods for the high-priority marine biological resources, applied in YugNIRO (currently Kerch Branch (“YugNIRO”) FSBSI AzNIIRKH) in 2014-2017, are reviewed. Application features of the analytical estimation methods are described. Results of calculation of the sprat abundance and biomass in the Russian zone of the Black Sea by mean...

Основной целью программы является мониторинг рыбопромысловой деятельности и обработка данных от наблюдателей посредством накопления информации в единой базе данных. Задачи программы: накопление и систематизация рыбопромысловых данных; прием и систематизация данных от наблюдателей с помощью интернет-канала; обеспечение доступа к накопленным данным;...

Sexual maturation of the Black Sea turbot Scophthalmus maeotica maeotica (Pallas, 1814) was investigated. Length, at which the turbot reaches maturity, was determined using the probit method based on the function of maximum likelihood in R language. Probit analysis was applied to two samples with 199 and 102 specimens, correspondingly. The samples...