Ceratium and Marine Hydrography
نویسندگان
چکیده
منابع مشابه
Cell Covering of Ceratium
In this, the first of three consecutive papers, the complex cell covering of Ceratium tripos is examined at different stages of development. During eytokinesis, the cleavage furrow is surrounded by a system of membranes which, together with the theeal plates, will comprise the future cell covering. The outermost membrane completely surrounds the cell and lies over a single layer of large flatte...
متن کاملNeoceratium gen. nov., a new genus for all marine species currently assigned to Ceratium (Dinophyceae).
The dinoflagellate genus Ceratium contains marine and freshwater species. Freshwater species possess six cingular plates, thick plates in the concave ventral area and usually develop a third hypothecal horn. The marine Ceratium species (>62 species) possess five cingular plates and thin plates in the concave ventral area; a third hypothecal horn is atypical. Resting cysts, a common feature in t...
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This paper sets out to discuss ongoing activities in the tide and chart datum components of hydrography and charting. It expands on the paper presented at FIG (Fédération Internationale des Géomètres) in Brighton 1998 by Mr Matt Higgins and is a revised and updated version of the paper Chart Datum for Hydrography by GPS delivered by the present authors to the Survey 99 Congress, Sunshine Coast,...
متن کاملFine structure of the longitudinal flagellum in Ceratium tripos, a marine dinoflagellate.
The fine structure of the longitudinal flagellum in Ceratium tripos, which performs not only undulations but also retractions, has been examined in both the retracted and relaxed states. Although conventional fixation always triggered retraction, the flagellum was found to remain relaxed when it was washed briefly with Ca2+-free medium prior to fixation. Previous light-microscopic investigation...
متن کاملSimilar glacial and Holocene Southern Ocean hydrography
We present new Holocene and glacial dO data measured on planktonic foraminifera Neogloboquadrina pachyderma and benthic foraminifera Cibicidoides species from the Atlantic and Pacific sectors of the Southern Ocean in order to better understand its glacial hydrography. Combined with previously published data, the latitudinal dO distributions of these foraminifera show no appreciable difference d...
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ژورنال
عنوان ژورنال: Nature
سال: 1945
ISSN: 0028-0836,1476-4687
DOI: 10.1038/156181a0