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    Tytuł:
    Selected results of the parametric soundings of the Gdańsk Bay
    Autorzy:
    Grelowska, G.
    Kozaczka, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/331563.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Tematy:
    parametric soundings
    Gdańsk Bay
    hydroacoustic
    Opis:
    The aim of the paper is to present results of experimental investigation using parametric echosounder in natural conditions for profiling the sub-bottom sediments in the Gdansk Bay. The special experimental setup has been arranged allowing penetration of bottom sediments as well as precise positioning and following a given route. Measurements were conducted exactly along given routes, for those geological profiles have bean taken by means of another method. It allow as to compare detailed date obtained by means of parametric echosounding to ones given at geological map. In all investigations the primary frequency of the array was of 100 kHz, whereas the secondary frequency changed in range 5 kHz - 15 kHz.
    Źródło:
    Hydroacoustics; 2008, 11; 105-112
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Space-time characteristics of mesoscale structures in the North- East Gdańsk Bay
    Autorzy:
    Golenko, N. N.
    Paka, W. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1920505.pdf
    Data publikacji:
    1999
    Wydawca:
    Instytut Morski w Gdańsku
    Tematy:
    mesoscale structure
    North-East Gdańsk Bay
    Opis:
    Temporal and spatial variability of mesoscale structures in the North-East Gdańsk Bay is discussed. During measurements in September 1997, variability in the upper layer was determined by convective cooling processes. Measurements made in January 1998 show that between the two periods renewal of a whole halocline water took place in the Gdańsk Bay.
    Źródło:
    Biuletyn Instytutu Morskiego w Gdańsku; 1999, 26, 1; 47-55
    1230-7424
    2450-5536
    Pojawia się w:
    Biuletyn Instytutu Morskiego w Gdańsku
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selenium content in European smelt (Osmerus eperlanus eperlanus L.) in Pomerania Bay, Gdansk Bay and Curonian Lagoon
    Autorzy:
    Pilarczyk, B.
    Pilecka-Rapacz, M.
    Tomza-Marciniak, A.
    Domagala, J.
    Bakowska, M.
    Pilarczyk, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/15264.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    selenium content
    European smelt
    Osmerus eperlanus
    Pomeranian Bay
    Gdansk Bay
    Curonian Lagoon
    Opis:
    Migratory smelt (Osmerus eperlanus eperlanus L.) may be perceived as a valuable indicative organism in monitoring the current environmental status and in assessment of a potential risk caused by selenium pollution. The aim of the study was to compare the selenium content in the European smelt from the Bay of Pomerania, Gdansk, and the Curonian Lagoon. The experimental material consisted of smelt samples (muscle) caught in the bays of Gdansk and Pomerania and the Curonian Lagoon (estuaries of the three largest rivers in the Baltic Sea basin: the Oder, the Vistula and the Neman). A total of 133 smelt were examined (Pomerania Bay n = 67; Gdansk Bay n = 35; Curonian Lagoon n = 31). Selenium concentrations were determined spectrofluorometrically. The data were analyzed statistically using one-way analysis of variance, calculated in Statistica PL software. The region of fish collection significantly affected the content of selenium in the examined smelts. The highest content of selenium was observed in smelt caught in the Bay of Gdansk (0.236 μg g-1 w.w.), then in smelt from the Pomeranian Bay (0.165 μg g-1 w.w.), and the lowest in smelt obtained in the Curonian Lagoon (Lithuania) (0.104 μg g-1 w.w.). The low concentrations of selenium recorded in the smelt show that there is a deficiency of this element, especially in the Curonian Lagoon (Lithuania). Geochemically, Poland and Lithuania are selenium deficient areas. Migratory smelt may serve as indicative organisms of environmental levels of selenium.
    Źródło:
    Journal of Elementology; 2015, 20, 4
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The imaging of Gdansk Bay seabed by using side sonar
    Autorzy:
    Grelowska, G.
    Kozaczka, E.
    Witos-Okrasińska, D.
    Szymczak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/259025.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    Gdańsk Bay seabed
    side sonar
    hydro-acoustic systems in waters
    Opis:
    This paper is mainly aimed at presentation of an impact of environmental conditions on imaging accuracy by using hydro-acoustic systems in waters of a high non-uniformity of spatial distribution of hydrological parameters. Impact of refraction on erroneous estimation of range, in case of wave radiation into water under a large angle, like in side sonars or multi-beam echo-sounders, is especially important. In this paper seasonal changes in sound speed and its impact on acoustic beam refraction is discussed. And, examples which illustrate errors in determination of side sonar range occurred during last investigations carried out in Gdansk Bay waters are presented.
    Źródło:
    Polish Maritime Research; 2018, S 1; 111-118
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Limitation of lignin derivatives as biomarkers of land derived organic matter in the coastal marine sediments
    Autorzy:
    Pempkowiak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079190.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    lignin oxidation
    biomarker
    stable carbon isotope
    nonlinear analysis
    Gdansk Bay
    Southern Baltic Sea
    coastal sediment
    Opis:
    Lignin oxidation products (vanillyl, syringil and cummaryl phenols), and δ13C were measured in a variety of land and marine samples collected in Inner Puck Bay – dominated by marine vascular plants, small river run-off, and shallow bottom, and in Gdańsk Bay – characterized by large river run-off, small marine vascular plants population, and the average depth exceeding euphotic zone. Both study areas are parts of the Gdańsk Basin, Southern Baltic. Typical δ13C values (δ13C = -28‰) and both composition and concentrations of lignin phenols were measured in samples originating from land. Small, yet easily measurable amounts of lignin phenols were found in marine vascular plants biomass (Σ8 = 90 µg/100 mg organic matter). The biomass was characterized by exceptionally high δ13C values (-12‰). No lignin phenols and typical δ13C values (-22‰) were measured in marine phytoplankton biomass. δ13C and both composition and content of lignin phenols in organic matter of surface sediments collected in the study area fall in the range marked by the end members. The proportion of land derived organic matter calculated using lignin phenols, or δ13C in Gdańsk Bay were comparable, while in Puck Bay they differed substantially. It was concluded that a) in areas with substantial bottom coverage with vascular plants the two end members approach, usually employed to establish the contribution of organic matter sources, is insufficient, b) organic matter originating from three sources: riverine, phytoplankton, and vascular plants contribute to sedimentary organic matter in Puck Bay with the respective proportion 30:40:30.
    Źródło:
    Oceanologia; 2020, 62, 3; 374-386
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Criteria of accidental damage by ships anchors of subsea gas pipeline in the Gdańsk bay area
    Autorzy:
    Marcjan, K.
    Dzikowski, R.
    Bilewski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/117554.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    vessel's damage consequences
    criteria of accidental damage
    ships anchors
    subsea gas pipeline
    Gdansk Bay Area
    pipeline
    underwater infrastructure
    damage to the pipeline
    Opis:
    This paper discusses issues of the accidental anchor damage to offshore subsea pipeline as one of the most significant threat to underwater infrastructure. The density of vessel traffic over the pipeline between platform Baltic Beta and Wladyslawowo power plant has been analyzed. In order to determine the most common damages associated with heavy ship traffic, the authors used the risk model for underwater infrastructure. For this purpose ships anchor equipment has been categorized and as the results the criteria of damage to the pipeline have been discussed.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 3; 441-446
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of natural conditions on the imaging of the bottom of the Gdańsk Bay by means of the side scan sonar
    Autorzy:
    Witos-Okrasińska, D.
    Grelowska, G.
    Kozaczka, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/258936.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    side scan sonar imaging
    Gdańsk Bay seabed
    refraction of sound ray in sea
    influence of ship’s movement on the wave on underwater imaging
    Opis:
    The interest in underwater resources is the reason for the development of modern hydroacoustic systems, including side sonars, which find numerous applications such as: research of seabed morphology and sediment characteristics, preparation of sea sediment maps, and even in special cases of biocenoses such as sea grass meadows, detection of specific targets at the bottom such as shipwrecks, mines, identification of suitable sites for maritime infrastructure. Such applications require precise information about the position of the objects to be observed. Errors affecting the depiction of the bottom using hydroacoustic systems can be divided into errors associated with improper operation of measuring and support devices, systematic errors and random errors. Systematic errors result from the changing conditions prevailing in the analyzed environment affecting the measurement system. The errors affecting the correct operation of hydroacoustic systems can include: changing angle of inclination of the beam caused by the vessel’s movement on the wave or refraction connected to changes in the sound speed as the depth function.
    Źródło:
    Polish Maritime Research; 2018, S 1; 104-110
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Astaxanthin, canthaxanthin and astaxanthin esters in the copepod Acartia bifilosa (Copepoda, Calanoida) during ontogenetic development
    Autorzy:
    Lotocka, M.
    Styczynska-Jurewicz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/48096.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    canthaxanthin
    Pomeranian Bay
    ontogenetic development
    astaxanthin
    Baltic Sea
    Calanoida
    Acartia bifilosa
    astaxanthin ester
    Gdansk Gulf
    Copepoda
    copepod
    Opis:
    The contents of astaxanthin, canthaxanthin and astaxanthin esters were studied in natural populations of the copepod Acartia bifilosa from the Pomeranian Bay and Gulf of Gdańsk in the southern Baltic Sea. Samples dominated by any one of three developmental groups: (1) nauplii, (2) copepodids I–III and (3) copepodids IV–V and adults of Acartia bifilosa were analysed by means of high performance liquid chromatography (HPLC). As ontogenetic development progressed, significant changes occurred in the proportion of particular pigments in the total pigment pool of the various developmental groups. Astaxanthin and canthaxanthin occurred in all the groups, the former being clearly dominant. However, an increasing percentage of astaxanthin esters was recorded in the copepodids I–III, and even more in the copepodids IV–V and adults group. Most probably, astaxanthin is the main pigment active in copepod lipid metabolism. Carotenoid pigments in copepods very likely act as efficient free-electron quenchers and may be involved as antioxidants in rapid lipid metabolism. The exogenously feeding stages (late nauplii and copepodids) transform plant carotenoids taken from food and are evidently capable of metabolising astaxanthin by esterification and further degradation. It is emphasised that, according to literature data, astaxanthin esters may have an even higher quenching ability. It is suggested that crustacean carotenoid pigments, with their electron donor-acceptor abilities, may replace oxygen in peroxidation processes connected with lipid metabolism. The consequences of such a physiological role of astaxanthin for present-day estimations of energy balances in zooplankton communities are mentioned.
    Źródło:
    Oceanologia; 2001, 43, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preliminary studies on helminth communities of small sandeel, Ammodytes tobianus L. (Actinopterygii: Ammodytidae), from the Gulf of Gdańsk and Pomeranian Bay, Poland
    Autorzy:
    Skrzypczak, M.
    Rolbiecki, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/6667.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    helminth community
    small sand eel
    sand eel
    fish
    Ammodytes tobianus
    Actinopterygii
    Ammodytidae
    Gdansk Gulf
    Pomeranian Bay
    Polska
    Źródło:
    Annals of Parasitology; 2016, 62, Suppl.
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Distribution and extent of benthic habitats in Puck Bay (Gulf of Gdansk, Southern Baltic Sea)
    Autorzy:
    Sokolowski, A.
    Jankowska, E.
    Balazy, P.
    Jedruch, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078880.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    benthic habitat
    Puck Bay
    Gdansk Gulf
    Baltic Sea
    biological value
    aesthetic value
    ecosystem
    maritime spatial planning
    sustainable management
    coastal environment
    Opis:
    The majority of the southern Baltic Sea seabed encompasses homogenous softbottom sediments of limited productivity and low biological diversity, but shallow productive areas in the coastal zone such as wetlands, vegetated lagoons and sheltered bays show a high variety of benthic habitat types offering favourable biotopic conditions for benthic fauna. Within Polish marine areas, semi-enclosed Puck Bay (the western part of the Gulf of Gdansk) ´ features an exceptionally diverse environment covering a range of benthic habitats which underscores its unique biological value and aesthetic quality and providing an impetus for conservation and ecosystem-based development. Full-coverages maps on benthic habitats in this area are therefore a necessary foundation for maritime spatial planning and implementation of strategies for sustainable management and protection of the coastal environment. This study presents the first comprehensive description and distribution of benthic habitats in Puck Bay which were categorised using the revised EUNIS 2019 classification system. Typological analyses were carried out based on inventory datasets from 1995 to 2019 including scientific publications, satellite images, open databases, topographic and geological maps, reports, theses, information available on websites and unpublished data shared willingly by individual researchers and administrative institutions. Collating various spatial data sources, that were first georeferenced and then visualized using techniques available in ArcMap 10.4.1 software (Esri), resulted in the mapping of benthic habitats and sites of important and protected plant species, which can contribute to the high confidence in environmental assessments and monitoring activities.
    Źródło:
    Oceanologia; 2021, 63, 3; 301-320
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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