Get Antarctic Siphonophores from Plankton Samples of the United PDF

By Angeles Alvarino, Joan M. Wojtan, M. Rachel Martinez(auth.)

ISBN-10: 0875901735

ISBN-13: 9780875901732

ISBN-10: 1118664760

ISBN-13: 9781118664766

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Published by means of the yank Geophysical Union as a part of the Antarctic examine Series.

The distribution of Siphonophora of the Antarctic, Subantarctic, and adjoining areas of the Pacific and Atlantic Oceans is defined. Specimens for this learn have been bought in the course of the usa Antarctic examine application from USNS Eltanin cruises 3-5, 8-23, 25-28, 35, and 38 in the course of spring, summer time, fall, and wintry weather. Samples have been amassed from 1962 to 1969, utilizing open-closing and nonclosing plankton nets. details is compiled on horizontal distributions of siphonophores within the South Atlantic Ocean west of 0°. Illustrations of the species, and maps of distribution on the 3 bathymetric degrees, also are integrated. moreover, facts on Eltanin cruise 30 are awarded, overlaying in most cases the Pacific tropical sector through the summer season, with a few stations lower than the equator (austral winter). Vertical distributions of every species are mentioned for the 3 bathymetric zones: epipelagic (200-0 m), mesopelagic (1000-200 m), and bathypelagic (below a thousand m). lifestyles levels and seasonal differences also are thought of. 80 species of Siphonophora have been pointed out in those collections. between those, and defined in different places, have been 5 new species: Lensia eltanin, L. eugenioi, L. landrumae, Heteropyramis alcala, and Thalassophyes ferrarii. The eudoxid levels of L. lelouveteau and L. reticulata have been additionally came upon. additionally, the next infrequent Siphonophora species have been amassed: Halistemma cupulifera, Desmophyes annectens, Lilyopsis rosea, Eudoxia macra, Lensia achilles, L. baryi, L. exeter, L. grimaldii, L. hostile, Nectocarmen antonioi, and Clausophyes galeata. the most typical species of the Antarctic?]Subantarctic quarter in the course of the 4 seasons was once Dimophyes arctica. The eudoxid phases of Chelophyes appendiculata, Diphyes dispar, Diphyopsis mitra, Clausophyes ovata, and Heteropyramis maculata have been considerable.


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Additional info for Antarctic Siphonophores from Plankton Samples of the United States Antarctic Research Program: Eltanin Cruises for Spring, Summer, Fall, and Winter (Cruises 3-5, 8-23, 25-28, 30, 35, and 38)

Example text

The eudoxidstagewasnot detected in the bathypelagic layer. The polygastricstageof C. This formwasfoundonlyin theepipelagic andmesopelagic zonesin limitedareas. A moderateconcentrationwas evident in the epipelagiczone southof New Zealand and in the region of the Pacific Antarcticbasin (Map A87). 34. A, PacificAntarcticbasin(Map A88). In general,the eudoxidstageoccurredat all three polygastric stage; B, superior nectophore; C, inferior nectophore;D, eudoxid. In the epipelagic layer a moderate concentration of the eudoxid form was found concluded thatthemainpopulation of C.

A, superior nectophore; B, inferior nectophore; C, eudoxid. 38. Diphyes dispar Chamisso andEysenhardt, 1821. A, superior nectophore; B, inferior nectophore; C, eudoxid (bractandgonophore) [fromAlvarifto, 27 28 ANTARCTIC Hentschel, 1935-1938]. SIPHONOPHORES Records in the South Atlantic extended toabout 60ø00'S [MargulLs, 1972]. Diphyopsis mitra (Huxley,1859) The eudoxid stage of D. The polygastfic formwasfoundonlyin theepipelagiczone,extendingsouth Diphyopsis mitra (Huxley, 1859) (Figure39) is a typical tropical species [Alvarifto, 1981a] but also inhabits temperatewaters [Alvariflo, 1971].

Superiornectophore Pacificgyre. [from AlvariCo, 1981a]. Records of L. hostile in the southwest Atlantic Ocean _ _ are rare and appear'm the region betweenAscensionand Fernandode Noronhaislands(Map B44). L. havockpolygastricpopulationswere presentonly in the wimer, where low density concentrationsappearedin themesopelagic layerat57ø10'S, 125ø22'W. In the southwest Ariantic Ocean, records extend from the temperateregion,off Mar del Plata, Argentina,to the SouthGeorgiaandSouthOrlmeyislands(Map B43).

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Antarctic Siphonophores from Plankton Samples of the United States Antarctic Research Program: Eltanin Cruises for Spring, Summer, Fall, and Winter (Cruises 3-5, 8-23, 25-28, 30, 35, and 38) by Angeles Alvarino, Joan M. Wojtan, M. Rachel Martinez(auth.)

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