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

ISBN-10: 0875901735

ISBN-13: 9780875901732

ISBN-10: 1118664760

ISBN-13: 9781118664766

About The Product

Published by way of the yankee 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 acquired through the usa Antarctic learn software from USNS Eltanin cruises 3-5, 8-23, 25-28, 35, and 38 in the course of spring, summer season, fall, and wintry weather. Samples have been accrued from 1962 to 1969, utilizing open-closing and nonclosing plankton nets. info 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, information on Eltanin cruise 30 are provided, overlaying commonly the Pacific tropical quarter throughout 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 other places, have been 5 new species: Lensia eltanin, L. eugenioi, L. landrumae, Heteropyramis alcala, and Thalassophyes ferrarii. The eudoxid phases of L. lelouveteau and L. reticulata have been additionally stumbled on. 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 area in the course of the 4 seasons used to be Dimophyes arctica. The eudoxid levels of Chelophyes appendiculata, Diphyes dispar, Diphyopsis mitra, Clausophyes ovata, and Heteropyramis maculata have been ample.


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Additional resources 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)

Sample text

A limited distributionwas notedfor L. Relativelylow concentrations were foundin theepipelagic zoneoff Chile(Map A163). Thisspecies was alsopresent in themesopelagic zoneat39ø56'S, 85ø54'W (Table A4). This specieswas absentfrom the summerand winter collections. In the fall, relatively low densitiesof Fig. 56. LensiahumerTotton,1941. Superiornectophore polygastricsappearedin the mesopelagiczone in the [fromAlvarifio,1981a]. Amundsen Sea area(Map A164) and in the bathypelagic andventralview of somatocyst layersat locationsfarthernorthof that areaandnorthof the Bellingshausen Sea(Map A165).

Onlytwooccurrences of distributed southwest of SouthIsland,New Zealand(Map the eudoxid stage were evident in the mesopelagiczone. (Table A4). the mesopelagiczone a relatively low concentration of the polygastricform was distributedwest and southwestof SouthIsland,New Zealand(Map A129). D. dispar eudoxicls werealsocollected at36ø33'S, One of low concentrationwas found off Chile, and another, numbers, at40ø05'S, 119ø40• (MapA128). 83ø15'W(TableA4). In thebathpelagic zonea low inmoderate A relativelylow densityof eudoxidswas foundduring concentration wasevident onlyat50ø01 'S,127ø3 I'W.

LensiacampanellaMoser,1925 LensiacampanellaMoser, 1925 (Figure44), is typical of tropical regions,being an indicator of warm surface currents[Alvarifto, 1981a, 1985; Margulis, 1971; Pugh, 19741. L. campanellawas presentonly during the springand fall. In the epipelagiczone the polygastricstage was Fig. 44. Le•ia c•pa•lla (Moser, 1925). Superior nectophore [from Alvarifto,1981a]. inhabits various depths in the Pacific Ocean, mostly occurringin the bathypelagicand mesopelagiclayersin the equatorial region [Alvarifio, 1971].

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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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