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  • Other Sources  (42)
  • Taylor & Francis  (24)
  • Cambridge University Press  (9)
  • Nature Publishing Group  (9)
  • Molecular Diversity Preservation International
  • 2020-2023
  • 2005-2009  (20)
  • 1990-1994  (22)
  • 1970-1974
  • 2005  (20)
  • 1991  (22)
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  • 2020-2023
  • 2005-2009  (20)
  • 1990-1994  (22)
  • 1970-1974
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  • 1
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    An Introduction to Programming with Mathematica (2005)
    Cambridge University Press
    In:  Cambridge, UK, Cambridge University Press, vol. 10, no. 1, pp. 1-40, (ISBN 0-521-84678-1 (550 pp.))
    Details
    Publication Date: 2005
    Description: ... Overall, An Introduction to Programming with Mathematica is a useful and readable book that could serve as the text for a generic programming class, a supporting text for a class on programming for geoscientists, or an introduction for experienced geoscience programmers looking for an easily readable summary of Mathematica's programming language. Experienced Mathematica programmers may find it useful as a refresher. The book's principal drawbacks are the high price of Mathematica for those who do not already have the software (although a modestly priced student version is available) and, for geoscientists in particular, a lack of relevant example problems
    Keywords: Handbook of mathematics ; computer ; algebra ; software
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Fundamentals of Structural Geology (2005)
    Cambridge University Press
    In:  Cambridge, Cambridge University Press, vol. 7, no. Publ. No. 12, pp. 127, (ISBN: 0521839270, 520 p.)
    Details
    Publication Date: 2005
    Description: Fundamentals of Structural Geology provides a new framework for the investigation of geological structures by integrating field mapping and mechanical analysis. Assuming a basic knowledge of physical geology, introductory calculus and physics, it emphasizes the observational data, modern mapping technology, principles of continuum mechanics, and the mathematical and computational skills, necessary to quantitatively map, describe, model, and explain deformation in Earth's lithosphere. By starting from the fundamental conservation laws of mass and momentum, the constitutive laws of material behavior, and the kinematic relationships for strain and rate of deformation, the authors demonstrate the relevance of solid and fluid mechanics to structural geology. This book offers a modern quantitative approach to structural geology for advanced students and researchers in structural geology and tectonics. It is supported by a website hosting images from the book, additional colour images, student exercises and MATLAB scripts. Solutions to the exercises are available to instructors
    Keywords: Structural geology ; Textbook of geology ; MATLAB ; scripts ; Tectonics ; Lithosphere
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Sexual reproduction in four Caribbean commercial sponges. II. Oogenesis and transfer of bacterial symbionts (1991)
    Taylor & Francis
    In:  Invertebrate Reproduction & Development, 19 (1). pp. 13-24.
    Details
    Publication Date: 2017-02-01
    Description: Oogenesis in four commercial Caribbean sponge species, Hippospongia lachne, Spongia barbara, S. cheiris and S. graminea, was studied using light and transmission electron microscopy. Eggs and embryos develop asynchronously in localized endosomal nurseries of these viviparous and gonochoristic species. Statistical analyses of specific morphological characteristics of reproductive elements have unequivocally identified four specific stages in the process of oogenesis. Oogonia undergo mitotic division to produce primary oocytes. Meiotic division occurs producing secondary oocytes which are fertilized before zygotes undergo major growth by phagocytosis and the transfer of nutrients through cytoplasmic bridges. During cleavage of the zygote, umbilici form between embryos and nurse cell layers and these function in the transfer of symbiotic bacteria and other mesohyl substances from the maternal parent to the embryo. These symbionts were observed dispersed between blastomeres of all young and maturing embryos and between internal cells of cytodifferentiated parenchymella larvae. Extracellular transfer of symbiotic bacteria from maternal tissues to developing embryos has not been reported in any other viviparous invertebrate.
    Type: Article , PeerReviewed
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  • 4
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    Distribution and morphological characters of immature Martialia hyadesi (Cephalopoda: Oegopsida) in New Zealand waters (1991)
    Taylor & Francis
    In:  New Zealand Journal of Marine and Freshwater Research , 25 . pp. 275-282.
    Details
    Publication Date: 2020-06-22
    Description: Before 1985, Martialia hyadesi (Cephalopoda: Ommastrephidae) in the Pacific Ocean was known only from the Eltanin Fracture Zone and Macquarie Island. A joint Japan‐New Zealand squid survey around New Zealand captured many immature ommastrephid squids. Gel electrophoresis confirmed the presence of immature M. hyadesi. Aspects of the external morphology are described. The distinctive tentacle club was evident in the smallest specimen examined, 19 mm dorsal mantle length (ML). Arm trabeculae were first evident in specimens of 40–50 mm ML. Immature squid were distributed around and southward of the Subtropical Convergence Zone. The presence of very small squid (〈 10 mm ML) indicated spawning on or near the Auckland Island Shelf.
    Type: Article , PeerReviewed
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  • 5
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    The butterfly squid Stoloteuthis leucoptera in the Mediterranean (1991)
    Cambridge University Press
    In:  Journal of the Marine Biological Association of the United Kingdom, 71 (01). p. 47.
    Details
    Publication Date: 2020-07-16
    Description: The presence of Stoloteuthis leucoptera in the Mediterranean is recorded on the basis of three specimens, including an adult male, caught by IKMT and by commercial otter-trawl in the Ligurian Sea. The hypothesis of a recent immigration is discussed. The list of Mediterranean cephalopods (Mangold Wirz, 1963; Torchio, 1968; Bello, 1986; Mangold & Boletzsky, 1987) includes the Sepiolidae of the subfamily Heteroteuthinae, whose members are supposed to be pelagic throughout their life cycle. Mangold Wirz (1963) recognizes in the Mediterranean fauna the unique species Heteroteuthis dispar, the other authors include H. atlantis Voss, which Voss himself (1955) reported at Messina. To this group may now be added Stoloteuthis leucoptera (Verrill, 1878) a species until now recorded in limited Atlantic areas. Verrill (1881) wrote “This species is an exceedingly beautiful one, when living, owing to the elegance and brilliancy of its colours and the gracefulness of its movements. In swimming it moves its fins in a manner analogous to the motion of the wings of a butterfly.”
    Type: Article , PeerReviewed
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  • 6
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    Sexual reproduction in four Caribbean commercial sponges. I. Reproductive cycles and spermatogenesis (1991)
    Taylor & Francis
    In:  Invertebrate Reproduction & Development, 19 (1). pp. 1-11.
    Details
    Publication Date: 2017-02-01
    Description: Sexual reproductive cycles of a Florida, U.S.A., population of four Caribbean commercial sponge species, Hippospongia lachne, Spongia barbara, S. cheiris and S. graminea, were determined by analysis of tissue samples collected over a three-year period. Spermatogenesis in these species was studied using light and transmission electron microscopy. The production of male gametes occurs in cysts within the endosomal tissue of mature specimens. Reproductive elements within an individual cyst develop synchronously while development between cysts is asynchronous. All available evidence suggests that these species are dioecious. Spermatogonia differentiate directly from choanocytes in situ. All cells of the chamber lose their collars and flagella and undergo mitosis to produce primary spermatocytes, each possessing a single flagellum. The ratio of nucleus to cell diameter in these cells is almost double that of choanocytes. Circumstantial evidence suggests that primary spermatocytes undergo meiosis to produce four spermatids, but confirmational chromatid linkage figures are still lacking. The mature spermatozoa lack both intermediate segments and acrosomes. Male gametes displayed a bright yellow-white autofluorescence when excited with blue light (460–485 nm).
    Type: Article , PeerReviewed
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  • 7
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    Food of squidLoligo vulgaris reynaudii(Cephalopoda: Loliginidae) on their spawning grounds off the Eastern Cape, South Africa (1991)
    Taylor & Francis
    In:  South African Journal of Marine Science, 10 (1). pp. 193-201.
    Details
    Publication Date: 2020-05-26
    Description: Squid on their spawning grounds feed mainly at night when they are more dispersed. In all, 28,5 per cent of squid sampled at night had food in their stomachs, whereas only 6,7 per cent of those collected by day had food. Most stomachs contained only a single prey species (90,8% of those analysed). Teleosts dominated the prey of squid collected at night (58%M), followed by crustaceans (25%), polychaetes (9%) and cephalopods (3%). By day the prey was dominated by cephalopods (61%), followed by teleosts (20%), crustaceans (14%) and polychaetes (2%). Bregmaceros sp. was the most frequently identified teleost, Loligo vulgaris reynaudii (cannibalism) the dominant cephalopod, ?Betaeus sp. (Alpheidae; pieces of coral were also found) the commonest crustacean and Nereis sp. the commonest polychaete. There were seasonal differences in the diet too: squid caught during summer seemed to have similar proportions of the four main prey components. Also, the incidence of feeding was higher than in winter. There were, however, no significant differences in stomach mass expressed as a percentage of body mass between day and night nor between season nor between sexes. The average stomach mass of all samples was 0,6 per cent of body mass, less than on the feeding grounds, where it is generally about 2 per cent.
    Type: Article , PeerReviewed
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  • 8
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    Water-body preferences of dominant calanoid copepod species in the Angola-Benguela frontal zone (2005)
    Taylor & Francis
    In:  African Journal of Marine Science, 27 (3). pp. 597-608.
    Details
    Publication Date: 2018-04-11
    Description: The distribution of five dominant calanoid copepods was related to different water masses in the Angola-Benguela Front system. Five water bodies were identified by principal component analysis, on the basis of abiotic parameter such as temperature, salinity, dissolved oxygen, phosphate, silicate, nitrate and nitrite. These parameters were reduced to single factors and arranged along two principal component axes. The copepod species incuded females and copepodites C5 of Calanoides carinatus and females of Metridia lucens, Centropages brachiatus, Nannocalanus minor and Aetideopsis carinata. The water bodies identified in the frontal system were related to currents, upwelling processes, an oxygen minimum layer and biological modification. The different copepod species, as well as the two ontogenetic stages of C. carinatus, showed clear preference for specific water bodies, and their behavioural and physiological adaptations to the environment are discussed.
    Type: Article , PeerReviewed
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  • 9
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    Distribution and re-description ofAbraliopsis lineataGoodrich, 1896 (Cephalopoda: Enoploteuthidae) from the Arabian Sea (1991)
    Taylor & Francis
    In:  Journal of Natural History, 25 (5). pp. 1121-1133.
    Details
    Publication Date: 2020-07-21
    Description: The enoploteuthid cephalopod Abraliopsis lineata is re-described and its generic position discussed. Specimens for the present study were captured during the Indian Ocean Expedition of RV Meteor in 1987, where the species occurred in considerable numbers. The geographical distribution of A. lineata is described and discussed. The detailed analysis of the photophore pattern of the present specimens differs from the original description. The diagnostic features in the male, especially the structure of the hectocotylus which separates A. lineata easily from the members of the subgenus Pfefferiteuthis, are outlined. The morphological differences which separate A. lineata from A. gilchristi, the only other member of the subgenus Micrabralia, are summarized.
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  • 10
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    Sexual reproduction in four Caribbean commercial sponges. III. Larval behaviour, settlement and metamorphosis (1991)
    Taylor & Francis
    In:  Invertebrate Reproduction & Development, 19 (1). pp. 25-35.
    Details
    Publication Date: 2017-02-01
    Description: Larval behaviour, settlement, and metamorphosis were investigated in four Caribbean commercial sponges, Hippospongia lachne, Spongia barbara, S. cheiris and S. graminea, using light and transmission electron microscopy. The parenchymella larvae of these viviparous and gonochoristic species have an average size of 350 μm by 420 μm when released. Symbiotic bacteria occur intercellularly in both larvae and post-larvae. Laboratory behavioural studies demonstrate that free-swimming larvae display directional swimming with constant lateral rotation and negative phototaxis. Larval settlement occurs 26–56 hours after release from the parent and involves the formation of a basal lamella between the post-larva and substrate. There is no evidence of larval substrate selection by type or orientation. The canal system begins to form six days after settlement and oscules are apparent eleven days post-settlement. Available evidence suggests that larval ciliated epithelial cells are terminally differentiated and do not appear to contribute to formation of post larva or adult in this group of Porifera.
    Type: Article , PeerReviewed
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