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Kozlov D.A.,Atlantic Research Institute of Marine Fisheries and Oceanography AtlantNIRO
Journal of Ichthyology | Year: 2014

Methods of determining age of alfonsino Beryx splendens in the area of the Azores Banks are described. On otoliths of the beryx, spawning marks form in the period of intensive spawning (June-September); those of hyaline zone form in the season of lowest water temperature in the considered area (January-March); and those of opaque zone form in the prespawning (April-May) and postspawning (October-December) periods. The growth of alfonsino in the northern part of the Atlantic is close to an isometric one. The rate of linear growth of alfonsino in the area of the Azores Banks in the first year of life is higher than in fish of the New Anyo Seamount and Vavilov Ridge but lower than at the Angular Seamount. Beginning from the second year of life, the rate of growth slows down and becomes lower than at the New Anyo and Angular seamounts, but it remains higher than the rate of growth of fish of the Vavilov Ridge. © 2014 Pleiades Publishing, Ltd. Source


It is suggested to distinguish two natural groups in the taxonomic rank of the subfamily within the family Caristiidae-Caristiinae and Paracaristiinae. Based on a large amount of factual material (42 individuals) and published data, systematics of Caristiinae (genus Caristius of the nontropical zone of the Pacific and Atlantic oceans is considered. The description of C. macropus from the northern part of the Pacific Ocean and of C. groenlandicus from the north Atlantic is provided. From the southeast Atlantic, three new species-C. barsukovi sp. n., C. litvinovi sp. n., and C. walvisensis sp. n.-are described. Their diagnostic characters comprise specific features of the structure of branchial apparatus, dentation on the jaws, roof of the oral cavity, as well as body proportions and number of rays in unpaired fins. A preliminary key for the identification of Caristiinae in the Atlantic Ocean is presented. © 2013 Pleiades Publishing, Ltd. Source


Karaseva E.M.,Atlantic Research Institute of Marine Fisheries and Oceanography AtlantNIRO
Journal of Ichthyology | Year: 2013

According to ichthyoplankton surveys of AtlantNIRO and published sources, the data on abundance of eggs and larvae of eastern Baltic cod Gadus morhua callarias at different spawning grounds of the Baltic Sea in 1931-1938, 1949-1956, and 1991-1996 are considered. We show that a similar type of spatial distribution of eggs and larvae of cod with localization of the greatest amount of its early ontogenetic stages in the Bornholm Basin in the southwest of the sea was observed in the 1930s and 1990s. The extension of the area of distribution was accompanied by an increase in the numbers of eggs and larvae of cod in all areas of the sea, and its decline was followed by a decrease in numbers, in the first turn, at northeastern spawning grounds in the Gotland Basin. The period of high numbers of eggs in 1949-1956 coincided with the century maximum of salinity of the near-bottom water layer. © 2013 Pleiades Publishing, Ltd. Source


Aleksandrov S.V.,Atlantic Research Institute of Marine Fisheries and Oceanography AtlantNIRO
Marine Pollution Bulletin | Year: 2010

The long-term data on the temporal and spatial changes of chlorophyll and nutrients concentrations, phytoplankton biomass, primary production and mineralization of organic matter in the Curonian and Vistula Lagoons were analyzed using seasonal data to 1994 and monthly data to 2007 at 9-12 stations. A comparison with hydrological (water temperature, salinity, water exchange) and chemical parameters indicate the main abiotic factors which influence the level of biological production and the trophic state of lagoons. Most of the Curonian Lagoon showed the strong summer warming-up of water (higher 20. °C) combined with freshwater conditions, slow-flow velocity and high concentrations of phosphorus which creates conditions for hyperblooms of Cyanobacteria. The biological production of the Vistula Lagoon is below the potentially possible level as the hydrodynamic activity (high-flow velocity) and brackish water prevent the intensive development of Cyanobacteria. The Curonian Lagoon may be considered as hypertrophic water body whereas the Vistula Lagoon is a eutrophic water body. © 2010. Source


Kukuev E.I.,Atlantic Research Institute of Marine Fisheries and Oceanography AtlantNIRO | Parin N.V.,RAS Shirshov Institute of Oceanology | Trunov I.A.,Atlantic Research Institute of Marine Fisheries and Oceanography AtlantNIRO
Journal of Ichthyology | Year: 2012

Manefishes (Caristiidae) of the East Atlantic are described. The validity of the genus Platyberyx is supported and its differences from the genus Caristius are described using characters that have not been applied before (e. g., dentation on the jaws and roof of the oral cavity). The redescription of the type species Platyberyx opalescens is given based on the material from the coastal zones of Morocco and Mauritania; the neotype of this species is established. Based on studied material and analysis of the literature data, a new species P. mauli sp. n. is described within the genus Platyberyx (together with P. opalescens). This species differs from P. opalescens in the structure of branchial apparatus, body proportions, and other characteristics. This species (as well as P. opalescens) belongs to the bathyal-pelagic ichthyocene of the continental slope of the East Atlantic. A new species, Caristius andriashevi sp. n., is described in the genus Caristius. Its specific characters are as follows: exclusively well-developed lateral line surrounded by spongy (most likely, lighting) tissue with enlarged perforated and densely packed scales located under the skin. The range of the species is wide tropical. A preliminary key for the identification of manefishes from the Atlantic Ocean is presented. © 2012 Pleiades Publishing, Ltd. Source

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