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    Wyświetlanie 1-8 z 8
    Tytuł:
    Seasonal and diel changes in the vertical distribution in relation to the age structure of Microcalanus pygmaeus Sars and Ctenocalanus citer Bowman and Heron, (Pseudocalanidae, Copepoda) from Croker Passage (Antarctic Peninsula)
    Autorzy:
    Zmijewska, M.I.
    Bielecka, L.
    Grabowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/47951.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    zooplankton
    Antarctic
    coastal water
    Microcalanus pygmaeus
    Pseudocalanidae
    vertical distribution
    plankton
    Ctenocalanus citer
    age structure
    Antarctic Peninsula
    seasonal change
    Copepoda
    Opis:
    The development of two representatives of Pseudocalanidae and the nature of their population distribution in the water column were investigated on the basis of plankton samples collected over three seasons in night-day series in Croker Passage. The investigations showed that the two species begin reproducing in different seasons. Regardless of season, the growth of M. pygmaeus is more advanced than that of C. citer. Both species are characterised by a separation of their populations in the water column. The youngest copepodite stages (I–III) inhabit the upper portion of the water in which the given species occurs, while the oldest specimens, especially males, inhabit the deepest waters. Additionally, the first growth phases (CI–CIII) show a tendency to concentrate closer to the surface at night.
    Źródło:
    Oceanologia; 2000, 42, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new predatory cladoceran Cercopagis (Cercopagis) pengoi (Ostroumov 1891) in the Gulf of Gdańsk
    Autorzy:
    Bielecka, L.
    Zmijewska, M.I.
    Szymborska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/48376.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Cercopagidae
    water temperature
    crustacean
    plankton
    Caspian Sea
    Baltic Sea
    zooplankton
    water body
    Finland Gulf
    new species
    Riga Gulf
    Gdansk Gulf
    Podonidae
    Cercopagis pengoi
    Opis:
    Cercopagis pengoi, a species native to the Ponto-Caspian area, was recorded for the first time in the Baltic Sea in the Gulf of Riga and in the open Gulf of Finland in 1992. Sampling in the shallow coastal area of the western part of the Gulf of Gdańsk at weekly intervals between April 1999 and April 2000 revealed the presence of C. pengoi in the zooplankton community. The species was recorded twice, at densities of 1369 indiv. m−3 on 30 July 1999 and 421 indiv. m−3 on 5 August 1999, when the water temperature was at its maximum, in excess of 21.7◦C and 23.9◦C respectively. C. pengoi had never been recorded in the Gulf of Gdańsk prior to 1999.
    Źródło:
    Oceanologia; 2000, 42, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Abundance and species composition of plankton in the Gulf of Gdańsk near the planned underwater outfall of the Gdańsk-Wschód (Gdańsk-East) sewage treatment plant
    Autorzy:
    Zmijewska, M.I.
    Niemkiewicz, E.
    Bielecka, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/48867.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    biomass
    abundance
    plankton
    underwater outfall
    Baltic Sea
    phytoplankton
    Gdansk city
    coastal area
    treatment plant
    zooplankton
    Gdansk Gulf
    Vistula River
    distribution
    Opis:
    The aim of this paper is to determine the current biological state of life in the pelagic zone of the Gulf of Gdańsk in relation to the planned start-up of an underwater outfall which will discharge sewage from the Gdańsk–Wschód (Gdańsk–East) sewage treatment plant. The plankton material was collected during two research cruises in July and October 1998. The samples were taken at 15 stations in four profiles located near Wyspa Sobieszewska (Sobieszewo Island), perpendicular to the coastline. Both the taxonomic and numerical structure of phytoplankton and zooplankton were typical of the coastal area of the Gulf of Gdańsk. The species diversity depends on hydrological conditions, mainly input from the River Wisła (Vistula). The abundance and biomass of phytoplankton in 1998 were several times lower than in 1994 and 1995 in the area off Górki Wschodnie, the profile located closest to the planned construction site. This could have been caused by generally lower temperatures in 1998 in comparison to previous years. In the investigated area only traces of algal eutrophication indicator species were noted. However, potentially toxic species were confirmed and were most abundant near the Wisła mouth. The highest concentrations of pelagic fauna occur in the shallowest area closest to the shoreline. Long-term observations of the dynamics of the variations in abundance and species composition indicate the increasing significance of one particular species – Acartia bifilosa.
    Źródło:
    Oceanologia; 2000, 42, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parameterisation of a population model for Acartia spp. in the Southern Baltic Sea. Part 2. Egg production
    Autorzy:
    Dzierzbicka-Glowacka, L.
    Lemieszek, A.
    Zmijewska, M.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/48730.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    environment condition
    Baltic Sea
    Gdansk Deep
    Acartia
    population model
    copepod
    egg production
    Opis:
    The paper describes the modelling ofeg g production in Acartia spp. under changing environmental conditions in the southern Baltic Sea (Gdańsk Deep). The hypothesis (Sekiguchi et al. 1980) that the food-saturated rate of egg matter production is equivalent to specific growth rate ofco pepods is applied. The average number ofeggs produced per day by one Acartia female is obtained as a function ofg rowth rate, i.e. by multiplying exp gN3 − 1 from the growth rate of the nauplius stage equation by Wfemale/Wegg. The copepod model, reduced to a zerodimensional population model calibrated for Acartia spp. under the environmental conditions typical ofthe southern Baltic Sea, was used to determine the effects of temperature and food concentration on the growth rate ofeac h oft he model stages (see Part 1 – Dzierzbicka-Głowacka et al. 2009 – this issue). In this part, egg production as a function of the above parameters is evaluated. The rate of reproduction during the seasons in the upper layer ofthe Gdańsk Deep is also determined.
    Źródło:
    Oceanologia; 2009, 51, 2; 185-201
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parameterisation of a population model for Acartia spp. in the Southern Baltic Sea. Part 1. Development time
    Autorzy:
    Dzierzbicka-Glowacka, L.
    Lemieszek, A.
    Zmijewska, M.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/49034.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    population dynamics
    environment condition
    Baltic Sea
    development
    Acartia bifilosa
    Acartia
    growth
    Gdansk Gulf
    population model
    Opis:
    The copepod model (see Dzierzbicka-Głowacka 2005b),red uced to a zero-dimensional population model (Fennel 2001,S tegert et al. 2007),i s calibrated for Acartia spp. under the environmental conditions typical of the southern Baltic Sea. Most of the coefficients used in the model are taken from the literature,co ntaining values from various published studies and parameters derived for similar species. The parameters for growth are presented in Part 1; those for population dynamics are given in Part 2. Ingestion rates,whic h are dependent on developmental stage, food supply,temp erature and weight of the animals, are estimated for Acartia bifilosa at 15◦C from the Gdańsk Deep after the experimental data of Ciszewski & Witek (1977). In Part 1 the model presents the change in mean individual mass in successive stages. Quantitative formulae are obtained describing the effects of temperature and food concentration on the development time of Acartia spp. for each of the model stage groups. The generation time during the seasons in the upper layer of the Gdańsk Deep is also determined. The simulations computed here are similar to the experimental results. Part 2 (Dzierzbicka-Głowacka et al. 2009 – this issue) will evaluate egg production as a function of the above-mentioned parameters,temp erature and food availability.
    Źródło:
    Oceanologia; 2009, 51, 2; 165-184
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seasonal variability in the population dynamics of the main mesozooplankton species in the Gulf of Gdansk (Southern Baltic Sea): Production and mortality rates
    Autorzy:
    Dzierzbicka-Glowacka, L.
    Kalarus, M.
    Musialik-Koszarowska, M.
    Lemieszek, A.
    Zmijewska, M.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/48667.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Copepoda
    calanoid copepod
    biomass
    seasonal variability
    population dynamics
    mesozooplankton
    Gdansk Gulf
    Baltic Sea
    production
    mortality rate
    secondary production
    Temora longicornis
    Źródło:
    Oceanologia; 2015, 57, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development and growth of Temora longicornis: numerical simulations using laboratory culture data
    Autorzy:
    Dzierzbicka-Glowacka, L.
    Lemieszek, A.
    Zmijewska, I.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/48869.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    development
    growth rate
    numerical simulation
    Temora longicornis
    laboratory culture
    temperature
    food concentration
    duration
    growth parameter
    North Sea
    zooplankton
    diet
    herring
    sprat
    Opis:
    Quantitative expressions are presented to describe the effects of temperature and food concentration on stage duration and growth rate of Temora longicornis for each of the model stage groups (N1–N6 – naupliar stages, C1, C2, C3, C4, C5 –the five copepodid stages). The calculations were made on the basis of experimental data from the literature for T. longicornis from the south-eastern and the southern North Sea. Relationships were obtained between the growth parameters and temperature for the 5–10◦C temperature range and food concentrations from 25 mgC m−3 to excess. Also computed was the total mean development time as a function of the above-mentioned parameters, temperature and food availability. The simulations computed here are similar to the experimental results. The growth rates for successive stages were obtained according to the correction of the ‘Moult Rate’ method, which allows the use of mean weights and stage durations. The calculations also suggest that three complete generations of T. longicornis from the Gdańsk Deep (the southern Baltic Sea) can develop during a single year.
    Źródło:
    Oceanologia; 2011, 53, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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