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  • Водные биоресурсы и среда обитания. Том 4, вып. 4

    Bragina, T.M. (Azov-Black Sea Branch of the FSBSI “VNIRO” (“AZNIIRKH”)Rostov-on-Don, Russia, 2021)
    GIS technology in the investigation of morphometric characteristics of the wintering pits in the Upper Reach of the Tsimlyansk Reservoir has been applied. Amphipods of the marine farms in Sevastopol coastal waters (Black Sea) have been investigated. New data on finding of alien prawn Macrobrachium nipponense (Decapoda, Palaemonidae) in the Don River (Azov Sea Basin) have been presented. Ichthyoplankton of the Russian territorial waters and exclusive economic zone in the Black Sea has been studied. Parasite fauna of the common carp (Cyprinus carpio Linnaeus, 1758) juveniles in the growing ponds of the Azov and Black Sea Fishery Basin has been identified. Comparative analysis of fishing conditions for the Azov Sea anchovy in September–November, 2019 and 2020 has been made.
  • On the announcement of the III International Scientific and Practical Conference “Biological Diversity: Study, Conservation, Restoration, Rational Use”, held on September 13–18, 2022 (Kerch State Maritime Technological University, Kerch, Russia)

    Azov-Black Sea Branch of VNIRO (2021)
    ОСНОВНЫЕ ТЕМАТИЧЕСКИЕ НАПРАВЛЕНИЯ: 1. Фундаментальная биология. 2. Наземные экосистемы. 3. Водные экосистемы. 4. Экологическое воспитание и образование. 5. Биоразнообразие и благополучие населения.
  • Results of the comparative analysis of fishing conditions for the Azov Sea anchovy in September–November, 2019 and 2020

    Panov, B.N.; Smirnov, S.S.; Spiridonova, E.O.; Negoda, S.A.; Trusova, K.T. (2021)
    The data on the stock and abundance of the European anchovy, its age, length, and weight characteristics, and the information on its distribution in the sea before the start of its fishing season have been considered. Abiotic environmental conditions of anchovy autumn migration have been monitored using daily indicators of atmospheric transfers in the area, as well as temperature and sea surface level (altimetry) at various locations of the Kerch pre-strait zones of the Azov and Black Seas from September 20 to November 20. In October 2020, the Azov Sea anchovy was in a better physiological state than in 2019, even though its stock remained virtually the same. Its fishing in the Black Sea in 2019 started early, lasted long, and was low-efficient; in 2020, on the contrary, it was late, short, and productive. Favorable conditions for the start of anchovy fishing in the Azov Sea were created by the northwestern atmospheric transfers and southeastern surface currents in the pre-strait zone of the Azov Sea, and the northern atmospheric transfers and southern surface currents in the Kerch Strait were more favorable for the anchovy migration to the Black Sea. Anchovy fishing in the Azov Sea started at the sea surface temperature 17.0–17.5 °C, and its large-scale fishing in the Black Sea started at 16 °C. In the Kerch pre-strait zone of the Black Sea, the predominance of eastern geostrophic currents facilitates the migration of the Azov Sea anchovy to the Caucasian coast. The strengthening of these currents facilitates the anchovy migration and reduces the effectiveness of its fishing, and their weakening exerts an adverse impact on its migration but increases the effectiveness of its fishing.
  • Parasite fauna of the common carp (Cyprinus carpio Linnaeus, 1758) juveniles in the growing ponds of the Azov and Black Sea Fishery Basin

    Khorosheltseva, V.N.; Strizhakova, T.V.; Kerimova, A.A.; Denisova, T.V. (2021)
    Fish farms located in the Azov and Black Sea Basin contribute greatly to the development of the fisheries and aquaculture in the Russian Federation. Here, the main cultivation targets are carp species, especially common carp (Cyprinus carpio Linnaeus, 1758). This work is aimed at the updating of the data on the current composition of the parasite fauna of the common carp from the rearing ponds of the Azov and Black Sea Fishery Basin. At the early stages of post-embryonic development, carp juveniles are exposed to parasite infestation both with a direct life cycle (before their transition to exogenous feeding) and with a complex life cycle (upon feeding on zooplankton organisms and benthos). At the investigated fish farms, the range of parasites in the carp juveniles covered 16 species from 5 classes: Peritricha (Trichodina sp. Ehrenberg, 1830), Monogenea (Dactylogyrus extensus Mueller et Van Cleave, 1932, Dactylogyrus sp. Mueller et Van Cleave, 1932, Gyrodactylus sp. Mueller et Van Cleave, 1932), Trematoda (Diplostomum sp. met. Nordmann, 1832, Posthodiplostomum cuticola met. Nordmann, 1832, Tylodelphys clavata met. Nordmann, 1832), Nematoda (Nematoda sp. l. Rudolphi, 1808, Spiroxys contortus l. Rudolphi, 1819), Cestoda (Bothriocephalus acheilognathi Yamaguti, 1934, B. opsariichthydis Yamaguti, 1934, Khawia sinensis Hsü, 1935, Neogryporhynchus cheilancristrotus Wedl, 1855, Paradilepis scolecina Rudolphi, 1819) and Crustacea (Lernaea elegans Leigh-Sharpe, 1925, Ergasilus sieboldi Nordmann, 1832). A considerable share (31.25 %) of the total number of parasites detected was comprised of the representatives of Cestoda class, found in four farms out of five investigated. Infestation rates for most parasite species were low, except for the Asian tapeworm Bothriocephalus acheilognathi.
  • Ichthyoplankton of the Russian territorial waters and exclusive economic zone in the Black Sea

    Nadolinsky, V.P.; Patyuk, V.V.; Efanov, A.D. (2021)
    Survival rate of a generation at the embryonic and larval stages of the life cycle plays a crucial role in the formation of fish stocks. The data on the distribution of the fish individuals at the early stages of their development allow for the mitigation of anthropogenic negative impact on the stocks of aquatic living resources. This study has been aimed at the investigation of the species composition and abundance of thermophilic and psychrophilic fish species at the early stages of their development in the Russian territorial waters and exclusive economic zone in the Black Sea, as well as the assessment of their status in these areas. Sampling was conducted using a cone-shaped ichthyoplankton net with 80 cm diameter opening (IKS-80), off the board of the vessel going through the circling motion at 3 knot speed for 10 minutes. In the summer season, the major share of the individuals caught at their embryonic stages of development is comprised by the European anchovy, red mullet, Atlantic horse mackerel, and annular seabream eggs. Among early juveniles, the larvae of gobies, blennies, and pipefishes prevail. It has been found out that the highest diversity of the fish species at their early stages of development is recorded in the summer season: 58 species in the territorial waters, and 14 species in the exclusive economic zone. Winter ichthyoplankton is not very diverse—only 4 species have been recorded. In the territorial waters, littoral fish species at their early stages of development prevail. Ichthyoplankton catches in the exclusive economic zone are mostly comprised by pelagic zooplanktivorous and pelagic carnivorous species. In the winter ichthyoplankton catches, both in the territorial waters and in the exclusive economic zone, eggs and early juveniles of 4 fish species are recorded: European sprat (eggs and larvae), whiting (eggs and larvae), shore rockling (larvae), and sand lance (larvae). Low species diversity of the ichthyoplankton during the winter season results from the low number of winter-spawning species.

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