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  • 1990-1994  (5)
  • 1970-1974  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    The Salient Features of Five Marine Ciliates in the Class Spirotrichea (Oligotrichia), with Notes on their Culturing and Behaviour (1994)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 41 (1994), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Descriptive information is provided for five ciliates collected from marine coastal British Columbian surface waters. In this paper we identify three new species, Strobilidium neptuni n. sp., Strobilidium veniliae n. sp., and Strombidinopsis multiauris n. sp.; provide a new name and description for one previously described species, Strombidium siculum nom. nov. and provide more taxonomic data for Strombidinopsis cheshiri Snyder and Ohman, 1991.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1994.tb01519.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Strombidium inclinatum n. sp. and a Reassessment of Strombidium sulcatum Claparède and Lachmann (Ciliophora) (1990)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 37 (1990), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Strombidium sulcatum is the type species for the genus Strombidium and has been repeatedly referred to over the last 130 yr. However, there are several taxonomic problems associated with it. We discuss why the original description of S. sulcatum lacks resolution to describe a single species. We conclude that: (1) the description of S. sulcatum sensu Fauré-Fremiet, 1912 be used to diagnose the species; (2) there are ambiguities in several redescriptions of S. sulcatum; and (3) S. sulcatum sensu Lynn et al., 1988 is Strombidium emergens (Leegaard, 1915) Kahl, 1932. From this analysis we present a description for Strombidium inclinatum n. sp. (previously S. sulcatum sensu Fenchel and Jonsson, 1988).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1990.tb01152.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The Effect of the Quantitative Protargol Stain and Lugol's and Bouin's Fixatives On Cell Size: A More Accurate Estimate of Ciliate Species Biomass (1993)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 40 (1993), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: . The quantitative protargol stain (QPS) is used to estimate ciliate biomass and species composition from mixed field samples. Length, width, breadth and volume of live Euplotes sp., Eutintinnus sp., Strobilidium spiralis, Strombidium acutum, and Gymnodinium sanguineum were compared with 0.6% acid Lugol's fixed, 5% Bouin's fixed, and QPS cells. Cells shrank due to treatments (ANOVA and Tukey's test, α= 0.05). Protistan post-fixation cell volume (as a percentage of live volume) was 55%-80% for acid Lugol's fixed, 40%-70% for Bouin's fixed, and 30%-65% for QPS. Each species shrank to a different extent; cytostructural elements apparently alter the effect of fixation. Egestion is likely not the main cause of shrinkage since the autotroph, G. sanguineum, shrank to the same extent as the heterotrophs when stained by QPS. If field studies do not consider fixation effects on cell size, biomass may be underestimated. We recommend, for studies on planktonic ciliates, either acid Lugol's and QPS be used concurrently or QPS be used alone and biovolume values divided by 0.4 to correct for shrinkage. We stress that this is a rough estimate as this value ranges from 0.3 to 0.45 for planktonic protists.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1993.tb04913.x
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  • 4
    Electronic Resource
    Electronic Resource
    Foreign Organelle Retention by Ciliates (1973)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 20 (1973), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Intact algal chloroplasts were found by electron microscopy in the peripheral cytoplasm of 2 ecologically important species of planktonic marine ciliates. The exact origin of the chloroplast is uncertain and the periods of their retention by the protozoa is unknown. The 2 ciliate species may function partially or fully as primary producers. In other ciliates algal eye-spots are retained and may actually be utilized. Ecologic and evolutionary implications of the observations are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1973.tb00877.x
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  • 5
    Electronic Resource
    Electronic Resource
    Mosaicism of microplankton communities in the northern Strait of Georgia, British Columbia (1991)
    Springer
    Marine biology 110 (1991), S. 301-314 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The northern Strait of Georgia, British Columbia, Canada, was sampled five times between March and September 1986, employing a grid of stations spanning the strait. The spring diatom bloom was not observed and may have been suppressed by a combination of wind exposure and grazing by microzooplankton, notably non-loricate oligotrichs and the dinoflagellateGyrodinium spirale. Macrozooplankton were not studied. By June, the ecosystem was dominated by flagellates, and ciliate biomass was three times greater than that of the nanoflagellates. The photosynthetic dominantHeterosigma akashiwo was possibly inhibiting diatom growth, as environmental conditions were conducive to the latter's growth. During late summer (August–September), surface waters became nutrient-depleted and a mosaic of organismal types was formed. The pattern included diatoms on the more turbulent west side, nanoflagellates on the more stable east side, and dinoflagellates in the north associated with frontal boundaries. The driving force behind the mosaic appeared to be tidal turbulence and was most effective at times of advanced water-column stratification. Other points of interest were subsurface concentrations ofChaetoceros species, which were perhaps maintained at the pycnocline by entrainment in areas of high tidal turbulence, and a large ratio of heterotrophic to photoautotrophic biomass, possibly due to mixotrophy in ciliates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01313717
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  • 6
    Electronic Resource
    Electronic Resource
    A ciliate red tide at Barrow, Alaska (1970)
    Springer
    Marine biology 7 (1970), S. 37-46 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In September 1968 the first occurrence of extensive red water in the Arctic Ocean in the vicinity of Point Barrow, Alaska, was recorded. The organism causing this water discoloration was a fairly large (100 to 150 μ) ciliated protozoan, with chlorophyll-containing endosymbionts. This ciliate, which is not identical to the commonly reported Mesodinium or Cyclotrichium species, is described in this paper, but cannot be identified with any organism described in the literature. Concentrations of dissolved inorganic nutrients and trace metals were determined on water samples obtained from the red water and also in the clear water adjacent to it. These data are discussed relative to the hydrographic conditions in the Chuckchi Sea around Point Barrow. A direct species' analysis by microscopic methods indicated that the plankton were quite similar in all the water samples except for the aforementioned red ciliate, which accounted for over 90% of the total cellular organic carbon in the samples from the red water. Chemical analyses indicated that the red tide ciliate contained approximately 51% protein, 33% lipid, 8% carbohydrate, 0.2% chlorophyll a, and 1.2% DNA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00346806
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of light, temperature and salinity on the growth rate of harmful marine diatoms, Chaetoceros convolutus and C. concavicornis that kill netpen salmon (1993)
    Springer
    Journal of applied phycology 5 (1993), S. 259-265 
    Details
    ISSN: 1573-5176
    Keywords: Chaetoceros ; diatoms ; salmon ; light ; temperature ; salinity ; growth rate ; factor interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Chaetoceros convolutus and C. concavicornis have been implicated in the death of salmon in netpens in the Pacific Northwest by damaging the salmon's gills. To better understand how environmental factors affect the distribution of these two species, the interacting effects of light, temperature and salinity on growth rate were examined by growing these species under a range of temperatures (4–18 °C), light (10–175 µmol photon m−2 s−1) and salinities (10–30‰). For C. convolutus, the growth rate showed a hyperbolic relationship with irradiance at 8, 14 and 18 °C and light saturation occurred at 9, 14 and 20 µmol photon mt s−1 respectively. At 4 °C for C. convolutus and 8 °C for C. concavicornis, cells grew at µmax, even at the lowest irradiances tested (10 µmol photon m−2 s−1). For C. convolutus, the amount of light required to saturate growth rate increased with temperature in an approximately linear fashion. The Q10 was 1.88, calculated by averaging over both species. C. concavicornis was the more euryhaline species growing at salinities as low as 17.5‰, while C. convolutus grew only at 25‰ and above.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00004028
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