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Author: George A. Llano
Publisher: American Geophysical Union
ISBN: 0875901174
Category : Science
Languages : en
Pages : 369
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Book Description
Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 17. Of the volumes currently available in the Antarctic Research Series, this volume is the fourth dealing with the biology of the antarctic seas. These collected papers comprise the results of original investigations, 11 of which are concerned mainly with the identification and distribution of marine plants and animals. In the first of these papers Stewart Springer gives a systematic appraisal of the five species of elasmobranch Rajidae from Antarctica, of which one represents a new and unique species. Heretofore one of the peculiarities of the antarctic ichthyological fauna has been the absence of sharks. In this very significant contribution, the author establishes the most southerly record for any member of the elasmobranchs. The second paper, by Patricia Kott, amplifies our systematic knowledge of the tunicates of the South Atlantic, South Pacific, and Indian oceans. It extends her monograph published as volume 13 of the Research Series under the title of Antarctic Ascidiacea and is based on collections made in the Antarctic through 1967; two new species are included. Additions and corrections to volume 13 are appended to this paper. John C. Markham reports on several lower chordates of the genus Cephalodiscus and discusses the systematics and distribution of the five species known from the Antarctic. The Deep Freeze materials examined in the course of this study were obtained through the U.S. Navy Hydrographic Office oceanographers from icebreakers assigned to task force 43 prior to and after the 1955–1959 International Geophysical Year and precede the National Science Foundation sponsored research now being conducted by the USNS Eltanin and the R/V Hero under the U.S. Antarctic Research Program.
Author: Angeles Alvarino
Publisher: American Geophysical Union
ISBN: 9780875901732
Category : Science
Languages : en
Pages : 468
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Book Description
Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 49. The distribution of Siphonophora of the Antarctic, Subantarctic, and adjacent regions of the Pacific and Atlantic Oceans is described. Specimens for this study were obtained during the United States Antarctic Research Program from USNS Eltanin cruises 3-5, 8-23, 25-28, 35, and 38 during spring, summer, fall, and winter. Samples were collected from 1962 to 1969, using open-closing and nonclosing plankton nets. Information is compiled on horizontal distributions of siphonophores in the South Atlantic Ocean west of 0°. Illustrations of the species, and maps of distribution at the three bathymetric levels, are also included. In addition, data on Eltanin cruise 30 are presented, covering mainly the Pacific tropical region during the summer, with some stations below the equator (austral winter). Vertical distributions of each species are discussed for the three bathymetric zones: epipelagic (200-0 m), mesopelagic (1000-200 m), and bathypelagic (below 1000 m). Life stages and seasonal variations are also considered. Eighty species of Siphonophora were identified in these collections. Among these, and described elsewhere, were five new species: Lensia eltanin, L. eugenioi, L. landrumae, Heteropyramis alcala, and Thalassophyes ferrarii. The eudoxid stages of L. lelouveteau and L. reticulata were also discovered. In addition, the following rare Siphonophora species were collected: 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 common species of the Antarctic Subantarctic region during the four seasons was Dimophyes arctica. The eudoxid stages of Chelophyes appendiculata, Diphyes dispar, Diphyopsis mitra, Clausophyes ovata, and Heteropyramis maculata were abundant.
Author: George A. Llano
Publisher: American Geophysical Union
ISBN: 0875901174
Category : Science
Languages : en
Pages : 369
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Book Description
Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 17. Of the volumes currently available in the Antarctic Research Series, this volume is the fourth dealing with the biology of the antarctic seas. These collected papers comprise the results of original investigations, 11 of which are concerned mainly with the identification and distribution of marine plants and animals. In the first of these papers Stewart Springer gives a systematic appraisal of the five species of elasmobranch Rajidae from Antarctica, of which one represents a new and unique species. Heretofore one of the peculiarities of the antarctic ichthyological fauna has been the absence of sharks. In this very significant contribution, the author establishes the most southerly record for any member of the elasmobranchs. The second paper, by Patricia Kott, amplifies our systematic knowledge of the tunicates of the South Atlantic, South Pacific, and Indian oceans. It extends her monograph published as volume 13 of the Research Series under the title of Antarctic Ascidiacea and is based on collections made in the Antarctic through 1967; two new species are included. Additions and corrections to volume 13 are appended to this paper. John C. Markham reports on several lower chordates of the genus Cephalodiscus and discusses the systematics and distribution of the five species known from the Antarctic. The Deep Freeze materials examined in the course of this study were obtained through the U.S. Navy Hydrographic Office oceanographers from icebreakers assigned to task force 43 prior to and after the 1955–1959 International Geophysical Year and precede the National Science Foundation sponsored research now being conducted by the USNS Eltanin and the R/V Hero under the U.S. Antarctic Research Program.
Author: Kornicker
Publisher:
ISBN: 9781118694732
Category : Marine biology
Languages : en
Pages : 367
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Book Description
Author: Stephen Cairns
Publisher: American Geophysical Union
ISBN:
Category : Nature
Languages : en
Pages : 174
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Book Description
Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 58. A systematic study was made of the calanoid copepod genus Euaugaptilus found in Isaacs-Kidd midwater trawl and Bongo plankton net samples taken in Antarctic and Subantarctic waters. A total of 303 adult copepods representing 14 species of Euaugaptilus were found, including five new species (E. hadrocephalus, E. perasetosus, E. aliquantus, E. brevirostratus, and E. austrinus) and seven new records (E. maxillaris, E. nodifrons, E. bullifer, E. gibbus, E. angustus, E. laticeps, and E. oblongus). Euaugaptilus antarcticus (Wolfenden) is restored from synonymy. All species are characterized with pertinent descriptions and illustrations. Keys are presented for identification of the species.
Author:
Publisher:
ISBN:
Category : Antarctica
Languages : en
Pages : 72
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Author: Llano
Publisher: American Geophysical Union
ISBN: 0875901050
Category :
Languages : en
Pages : 286
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Author:
Publisher: American Geophysical Union
ISBN:
Category : Geology
Languages : en
Pages : 297
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Author: James P. Kennett
Publisher: American Geophysical Union
ISBN: 9780875908380
Category : Science
Languages : en
Pages : 296
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Book Description
Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 60. The Antarctic continent and the surrounding Southern Ocean represent one of the major climate engines of the Earth: coupled components critical in the Earth's environmental system. The contributions in this volume help with the understanding of the long-term evolution of Antarctica's environment and biota. The aim of this and the preceding companion volume is to help place the modern system within a historical context. The environment and biosphere of the Antarctic region have undergone dynamic changes through geologic time. These, in turn, have played a key role in long-term global paleoenvironmental evolution. The development of the Southern Ocean itself, resulting from plate tectonism, created first-order changes in the circulation of the global ocean, in turn affecting meridional heat transport and hence global climates. Biospheric changes responded to the changing oceanic climatic states. Comprehension of the climatic and oceano-graphic processes that have operated at various times in Antarctica's history is crucial to the understanding of the present-day global environmental system. This knowledge will become increasingly important in parallel with concerns about anthropogenically caused global change. How vulnerable is the Antarctic region, especially its ice sheets, to global warming? The question is not parochial, given the potential of sea level change resulting from any Antarctic cryospheric development. Conversely, how much of a role does the Antarctic region, this giant icebox, play in moderating global, including sea level, change?
Author:
Publisher:
ISBN:
Category : Palecology
Languages : en
Pages : 296
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Book Description
Papers based on work presented at a conference held at the University of California, Santa Barbara, August 28-31 1991, entitled 'The Role of the Southern Ocean and Antarctica in Global Change : an Ocean Drilling Perspective.' Papers deal with paleoenvironmental data from the Antarctic, including geology, climate, fossils, sediments and the eustatic record.
Author: Southwest Fisheries Center (U.S.)
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 904
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Book Description
