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Author : Patricia Mather
Publisher : American Geophysical Union
Page : 296 pages
File Size : 46,8 Mb
Release : 1969
Category : Nature
ISBN : 9780875901138
Author : George A. Llano,I. Eugene Wallen
Publisher : American Geophysical Union
Page : 369 pages
File Size : 44,5 Mb
Release : 1971
Category : Science
ISBN : 9780875901176
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 : George A. Llano
Publisher : American Geophysical Union
Page : 369 pages
File Size : 53,6 Mb
Release : 1971
Category : Marine biology
ISBN : 8210379456XXX
Author : Anonim
Publisher : American Geophysical Union
Page : 297 pages
File Size : 43,5 Mb
Release : 1998
Category : Geology
ISBN : 8210379456XXX
Author : Merrill W. Foster
Publisher : American Geophysical Union
Page : 192 pages
File Size : 43,5 Mb
Release : 1974
Category : Science
ISBN : 9780875901220
Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 21. The Recent brachiopod faunas from southernmost South America, Antarctica, and the Subantarctic consisting of 21 genera and 37 species are described from new material. New taxa include the genera Manithyris and Bathynanus. Also new are 11 species: Compsothyris ballenyi, Hispanirhynchia? chiliensis, Manithyris rossi, Liothyrella multiporosa, Liothyrella scotti, Bathynanus tenuicostatus, Eucalathis macrorhynchus, Amphithyris hallettensis, Dallina eltanini, Fallax antarcticus, and Magellania? spinosa. Factor analysis was used to study relationships among morphological characters and environmental parameters. In Liothyrella, negative associations were found between beak height and water depth. The size of the pedicle opening within this genus is associated with the width of the hinge plate and the loop; apparently, these associations are related to increased dorsal adjustor muscle size with increased pedicle size. Similar relationships are found in the terebratellids, although here all of the characters are also negatively associated with water depth. Characters negatively associated with water depth may relate to the differing current strength at various depths. Puncta density is positively correlated with water temperature. Examples of brachiopod variation are discussed. Synonyms have resulted from former failure to study large samples and to appreciate the extent of brachiopod variation. A priori valuation of certain characters as being specific is unwarranted, since sibling species may be more similar than different subspecies of the same species. Many Recent and fossil brachiopod genera are too narrow in definition owing to oversplitting or to a narrow conception of monophyly. I advocate somewhat broader and more practical genera for obtaining the maximal information value from such taxa. Brachiopods, contrary to popular belief, are an abundant and viable group in the southern hemisphere faunas. Most brachiopods in the Ross Sea appear to have definite niches and habitats but may overlap geographically where population densities are low. Brachiopods here can be divided roughly into a slope and a shelf assemblage. The greatest species diversity occurs at the seaward edge of the Ross Sea shelf, interpreted as an ecotone effect where two different water types meet. Only South America and Antarctica appear to have or have had direct communication between some elements of their brachiopod faunas. Other similarities between separate southern continents are related to retention of common pre-Cenozoic elements or to chance dispersal of larvae across barriers. Events related to cooling during the late Pliocene or Pleistocene caused reduction of puncta density, shell thickness, and spiculation in the Recent fauna and apparently influenced the present species structure, at least in Liothyrella uva, Gyrothyris mawsoni, and Macandrevia.
Author : William A. Newman,Arnold Ross
Publisher : American Geophysical Union
Page : 315 pages
File Size : 55,5 Mb
Release : 1971
Category : Cirripedia
ISBN : 9780875901145
Author : Anonim
Publisher : Unknown
Page : 92 pages
File Size : 44,6 Mb
Release : 1973
Category : Antarctica
ISBN : MINN:30000011054503
Author : Filkorn
Publisher : American Geophysical Union
Page : 107 pages
File Size : 46,6 Mb
Release : 1994
Category : Electronic
ISBN : 8210379456XXX
Author : Tape
Publisher : American Geophysical Union
Page : 154 pages
File Size : 40,7 Mb
Release : 1994
Category : Electronic
ISBN : 8210379456XXX
Author : Augusta Ärnbäck-Christie-Linde
Publisher : Unknown
Page : 60 pages
File Size : 53,7 Mb
Release : 1938
Category : Scientific expeditions
ISBN : STANFORD:36105025483681
Author : R. N. Gibson,R. J. A. Atkinson
Publisher : CRC Press
Page : 444 pages
File Size : 41,5 Mb
Release : 2003-07-31
Category : Science
ISBN : 9780203180570
Interest in oceanography and marine biology and its relevance to global environmental issues continues to increase, creating a demand for authoritative reviews that summarize recent research. Oceanography and Marine Biology: An Annual Review has catered to this demand since its foundation, by the late Harold Barnes, more than 40 years ago. It is an
Author : Louis S. Kornicker
Publisher : American Geophysical Union
Page : 256 pages
File Size : 54,7 Mb
Release : 1991-01-08
Category : Science
ISBN : 087590761X
Published by the American Geophysical Union as part of the Antarctic Research Series, Volume 52. The eunicemorph polychaetes from Antarctic and Subantractic seas are reviewed, and new data adding to the knowledge of the eunicemorphs from New Zealand, Australia, Chile, and Argentina have been included. The systematics of the order Eunicemorpha is discussed, and suggestions are made pertinent to the status and definition of some families. It is proposed to merge the Lysaretidae with the Lumbrineridae, and the Oenonidae with the Arabellidae, and to redefine the Iphitimidae as a family independent of the Dorvilleidae.
Author : Anonim
Publisher : Academic Press
Page : 558 pages
File Size : 55,5 Mb
Release : 1972-11-08
Category : Science
ISBN : 0080579337
Advances in Marine Biology
Author : Anonim
Publisher : Unknown
Page : 486 pages
File Size : 54,5 Mb
Release : 1974
Category : Antarctica
ISBN : UCAL:B3590685
Author : National Library of Medicine (U.S.)
Publisher : Unknown
Page : 976 pages
File Size : 42,9 Mb
Release : 1965
Category : Medicine
ISBN : MINN:31951M013680686