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  On the fifth anniversary of the scientific peer-reviewed journal “Aquatic Bioresources & Environment”

  Bragina, Tatyana; Mikhaylyuk, Ekaterina A.; Reshitko, E.E.; Savchuk, Elena A. (2023)

  Водные биоресурсы и среда обитания

  The scientific peer-reviewed journal “Aquatic Bioresources & Environtment” has been published since 2018 and functions as a discussion platform for researchers and practitioners of the vast fishery region (mainly the Southern Russia). In July 2023, the journal celebrated its fifth anniversary. The aim of this article is to review the notable milestones of the formation of the journal as a scientific publication from its first issue up to the present moment. Currently, the journal is included in the List of peer-reviewed scientific publications, in which the main scientific results of dissertations for the degree of Candidate of Science and for the degree of Doctor of Science should be published (List of the Higher Attestation Commission), and is abstracted in the International Information System for Aquatic Sciences and Fisheries Abstracts (ASFA) and the Scientific Electronic Library e-library.ru (eLIBRARY), as well as indexed in the Russian Science Citation Index (RSCI). Articles in the journal are assigned with Digital Object Identifiers (DOI), which are registered by the international agency Crossref; they are posted on the journal's website and added to RSCI and other databases.
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  Stock assessment of the marine fish species in the Black Sea (Russian waters) in 2021

  Shlyakhov, Vladislav; Piatinskii, Mikhail (2023)

  Водные биоресурсы и среда обитания

  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 when they are assessed by the mathematical methods to estimate the current stock biomass and fishing mortality. For 11 stock units, analytical modeling including cohort, production and trend models has been applied. Based on the estimates of biomass and fishing mortality concerning biological reference points, in 2021, the status of six stock units of the marine fish species inhabiting the basin and exploited by the Russian fisheries was identified as increasing or stable (“Black Sea” stock units of the European sprat and European anchovy, “Crimean” stock unit of turbot, “Crimean and Caucasian” stock unit of red mullet, and “Black and Azov Seas” stock units of garfish and rays). Five fishery stock units (“Crimean and Caucasian” of mullets, picarel and Mediterranean horse mackerel, “Black and Azov Seas” of sand smelts, and “Caucasian” of turbot) have shown a decreasing trend in terms of abundance, and for the rest of the investigated fish stock units (“Mediterranean migrant” bluefish, Atlantic bonito and Atlantic mackerel, “Black Sea” whiting, so-iuy mullet and the other marine fish species, “Black and Azov Seas” spiny dogfish), the status has not been determined due to the absence of systematic biological and fishery data.
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  Fluctuating asymmetry of the head seismosensory canals in roach Rutilus rutilus (L.) from the middle rivers of Udmurtia with different levels of chemical pollution

  Kotegov, Boris (2023)

  Aquatic Bioresources & Environment

  In the middle rivers of the Udmurt Republic, fish were caught near the sampling stations for the state environmental monitoring. The fluctuating asymmetry (FA) of the pore number of the seismosensory canals in the dermal head bones of the roach, Rutilus rutilus (L.), which prevailed in the catches, was estimated using osteological analysis. Its indicators in the roach individuals caught in the different river sections have been collated with the values of specific combinatorial water pollution index (SCWPI) of the examined sections and with the average concentrations of some pollutants in water in late spring and early summer for the several years preceding the years of catching. A statistically significant trend for the increase in the FA variance (Sas2), calculated on the basis of the total number of pores in the head seismosensory system of the roach, with the increase in the SCWPI and the content of some anions (chlorides, nitrites, nitrates) in the river water of its habitats has been identified. The highest Sas2 was observed in the roach individuals caught in the Izh River dowstream from Izhevsk in the environment, severely polluted by municipal wastewater, while the lowest one was recorded in the Kilmez River, the least polluted by wastewaters. No significant relationships between the FA indicators in this fish species and the content of heavy metals or other pollutants in the middle rivers of Udmurtia have been revealed. These results are considered to be attributable to a decrease in stability of morphogenesis in the fish organisms that developed under non-optimal (stressful) hydrochemical conditions.
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  Informe Anual del Centro Colombiano de Datos Oceanográficos (Cecoldo) 2020

  Dirección General Marítima (Ed. Dimar, 2021-02)

  La pandemia por la COVID-19 ocasionó en Colombia un cierre progresivo de todo tipo de actividad que implicara la interacción presencial entre un grupo de personas. En el país inició en marzo de 2020 y a la fecha de elaboración del presente informe continúa, con un pico epidemiológico que obligó nuevamente al confinamiento total de la población el cual se había levantado durante el último trimestre de 2020. Muchas iniciativas de monitoreo y, en general, de toma de datos en sitio se retomaron precisamente en el último trimestre de la vigencia; otra fuente de datos como la Red de Medición de Parámetros Oceanográficos y de Meteorología Marina (RedMpomm) no detuvieron sus operaciones para la adquisición de datos en tiempo real, sin embargo tuvieron que sortear las dificultades que se presentaron para el mantenimiento de estaciones automáticas y boyas de oleaje que hacen parte de esta red. De ahí que el 2020 no se destacó precisamente por la alta producción de datos oceanográficos en el país, lo cual fue aprovechado por el Cecoldo para enfocar sus esfuerzos en gestionar los datos de varias iniciativas para completar series y conjuntos de datos históricos y recientes, y para formular e iniciar el desarrollo de proyectos de tecnología que permitieran facilitar y promover el acceso y uso de los datos que produce Colombia.
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  Characterization of the beluga breeding practices at the Don Sturgeon Hatchery

  Vorobieva, O.A.; Gorbenko, E.V.; Sergeeva, S.G.; Pavlyuk, A.A.; Khorosheltseva, V.N. (2023)

  Водные биоресурсы и среда обитания

  The study conducted in 2022 has identified a lack of consistency in the results of the beluga artificial reproduction at the Don Sturgeon Hatchery (DSH). To obtain eggs, mostly the females born in 2001–2004 were used, out of which 31 females at age 18 reached their first maturity and one female at age 21 was a repeat spawner. The majority of first-spawning females produced eggs of low quality. During incubation, there was a substantial loss of fertilized eggs, and various anomalies of embryonic development were observed, which necessitated termination of the incubation of such eggs. The yield of one-day larvae from the eggs obtained from the first-spawning females and set for incubation was low, around 12 %. One of the reasons for the increased mortality rates and development anomalies in the larvae was low quality of the oocytes in the first-spawning individuals. A second-spawning female has shown satisfactory results; the fertilization rate was in line with the standard values, and no more than 17 % of the eggs manifested embryonic anomalies during their incubation. The yield of one-day larvae was 53.3 %. In total, 799 thousand one-day beluga larvae were obtained. The analysis of the cultivation practices at the Don Sturgeon Hatchery made it possible to identify the bottleneck points and critical junctures at some stages of the biotechnological process, as well as to give recommendations on improvement of the hatchery operation. An important prerequisite for obtaining good results is the physiological adequacy of beluga females, which is based, for the most part, on the living environment and feeding quality of the breeders and their replacement in the broodstock.

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