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  • 1
    ISSN: 1432-072X
    Keywords: Methanopyrus ; Methanogens ; Archaea ; Hyperthermophilic ; Marine ; Vents
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A novel group of hyperthermophilic rod-shaped motile methanogens was isolated from a hydrothermally heated deep sea sediment (Guaymas Basin, Gulf of California) and from a shallow marine hydrothermal system (Kolbeinsey ridge, Iceland). The grew between 84 and 110°C (opt: 98°C) and from 0.2% to 4% NaCl (opt. 2%) and pH 5.5 to 7 (opt: 6.5). The isolates were obligate chemolithoautotrophes using H2/CO2 as energy and carbon sources. In the presence of sulfur, H2S was formed and cells tended to lyse. The cell wall consisted of a new type of pseudomurein containing ornithin in addition to lysine and no N-acetylglucosamine. The pseudomurein layer was covered by a detergent-sensitive protein surface layer. The core lipid consisted exclusively of phytanyl diether. The GC content of the DNA was 60 mol%. By 16S rRNA comparisons the new organisms were not related to any of the three methanogenic lineages. Based on the physiological and molecular properties of the new isolates, we describe here a new genus, which we name Methanopyrus (the “methane fire”). The type species is Methanopyrus kandleri (type strain: AV19; DSM 6324).
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-072X
    Keywords: Eubacteria ; Evolution ; Extreme thermophile ; Thermotoga
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Three new strains of eubacterial hyperthermophiles were isolated from continental solfataric springs at Lac Abbé (Djibouti, Africa). Due to their morphology, lipids, and RNA polymerases they belong to the genus Thermotoga. Strains LA4 and LA10 are closely related to Thermotoga neapolitana found up to now only in the marine environment. Strain LA 3 differs from Thermotoga maritima and Thermotoga neapolitana in significant physiological and molecular properties. It is described as the new species Thermotoga thermarum.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 351 (1991), S. 394-397 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Taxonomic relationships can be reconstructed by comparison of aligned homologous proteins such as haemoglobin, for which many amino-acid sequences are available11. Latimeria haemo-globin chains were sequenced by Edman degradation (T.G., T.K., J. G. Sgonros and L. Kasang, manuscript in preparation), ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 329 (1987), S. 331-333 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] L. chalumnae is found near the remote volcanic islands of the Comores in the Western Indian Ocean at a depth of -200 m. Since their disco, ;ry in 1938 no observations of free-ranging fish in their natural environment have been made, although locomotory patterns have been observed on line-fished ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 357 (1992), S. 105-105 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - Coelacanths (Latimeria chalum-nae) are accidental yet inevitable victims of the oilfish fishery on which depends the economy of the Islamic Republic of the Comores in the western Indian Ocean. Coelacanths die within a few hours of capture, and the impossibility of preventing coelacanth ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 374 (1995), S. 314-314 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - The living coelacanth Latimeria chalumnae is the sole survivor of the old lineage of crossopterygian fishes and is of great importance for evolutionary biology1. Recently coelacanths were assigned to 'category 1' of the Convention of International Trade of Endangered Species ...
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 266 (1977), S. 830-832 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Amphiprion is widely distributed in the tropical and subtropical Indopacific region and is symbiotic with several sea anemones5. A 38-month field study of the ecology and social behaviour of A. bicinctm in Eilat, Israel (Red Sea) and a 2-month study of A. alkallopisos at Aldabra indicated that the ...
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 346 (1990), S. 323-324 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR-Fifty years after the discovery of living coelacanths, these ancient fish are threatened with extinction within two decades1. Can this famous fish be protected and saved? Almost all (98.6 per cent) of coelacanths have been caught along the west coast of Grande Comore, Western Indian Ocean ...
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 435 (2005), S. 901-901 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Coelacanths were discovered in the Comoros archipelago to the northwest of Madagascar in 1952. Since then, these rare, ancient fish have been found to the south off Mozambique, Madagascar and South Africa, and to the north off Kenya and Tanzania — but it was unclear whether these are ...
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Auf Madagaskar läuft die EidechseCryptoblepharus boutoni cognatus einmal am Tag bei Einsetzen der Ebbe in die langsam trockenfallende Gezeitenzone, wo sie nach Insekten, Krebsen und Fischen (jungePeriophtalmus kohlreuteri) jagt. Die gezeitenanhängige Aktivität, definiert als die Anzahl der frei umherlaufenden Tiere, wurde gemessen. Die Eidechse ist ortstreu und wandert auf erlernten Wegen zwischen den Ruheplätzen an Land und den Jagdgründen in der Gezeitenzone. Bei Verfrachtung über ca. 200 m außerhalb ihres Aktionsraumes (home range) kehrt sie in ihr Heimatareal zurück. Ortstreue, gezeitenperiodische Wanderungen und Heimfinde-Verhalten werden als Anpassung für das Leben in der Gezeitenzone diskutiert. Die Eidechse ist ein Gezeitenzonen-Spezialist, die ohne Aufgabe ihrer terrestrischen Lebensweise in diese neue ökologische Nische eingedrungen ist.
    Notes: Summary The lizardCryptoblepharus boutoni cognatus was observed in Madagaskar. The animals descended daily into the intertidal zone to feed there on insects, crustaceans and fish (juvenilePeriophthalmus kohlreuteri). The pattern of activity of the animals is related to the movements of the tides. The lizards have a definite home range and migrate between intertidal feeding area and resting place on land along pathways established by experience. They return to their home even if released at about 200 m from their home range because they seem to acquire a knowledge of the surrounding by occasional exploratory visits. The tendency to establish a home range and homing behaviour are considered as adaptations for life in the intertidal zone, but the lizard remains a purely terrestial animal.
    Type of Medium: Electronic Resource
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