36 resultados para Babylonia spirata


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The impact of starvation on larvae of Ivory shell Babylonia formosae habei was studied in a laboratory experiment. Newly hatched veligers showed considerable tolerance to starvation due to their endogenous yolk material, and time to the point-of-no-return (PNR; the threshold point during starvation after which larvae can longer metamorphose even if food is provided) was calculated to be 104.5 h. However, starvation still affected larval growth, survival, and metamorphosis. Mean shell length of larvae increased 49.77 mum day(-1) for nonstarved, but only 11.13 mum day (-1) for larvae starved for 108 h. After larvae began feeding, their growth rates rapidly recovered to the level of the nonstarved following short periods of starvation (less than 48 h), but were inhibited and unable to ever reach the level of the nonstarved when being starved beyond 48 h. Percent metamorphosis was 53.75% for the nonstarved, but all larvae died before 10 days for those starved for 108 h. Starvation not only affected larval time to reach metamorphosis, but also caused the delay in the time to metamorphosis. For the nonstarved, larvae took only 11.5 days to reach spontaneous metamorphosis, but they took 20 days to reach spontaneous metamorphosis when starved for 96 h, and this duration of delayed metamorphosis reached 8.5 days. Furthermore, the importance of yolk material for maintaining larval survival of B. formosae habei during starvation periods is also discussed. (C) 2004 Elsevier B.V. All rights reserved.

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The thesis comprises the comic novel "Babylonia", set in the Northern Territory, the Middle East and the United States in August 1990 after the Iraqi invasion of Kuwait, and the accompanying exegesis that links "Babylonia" to selected Australian fiction and to political and cultural concerns of the current era.

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Mode of access: Internet.

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Mode of access: Internet.

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Contains the text originally published in 3 vols.: 1. The dawn of civilization: Egypt and Chaldaea; 2. The struggle of the nations: Egypt, Syria and Assyria; 3. The passing of the empires, 850 B.C. to 330 B.C.

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Appendices: I. Recent explorations in Turkestan in their relation to the Sumerian problem. II. A chronological list of the kings and rulers of Sumer and Akkad.

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Tr. of: Histoire ancienne des peuples de l'Orient classique.

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Mode of access: Internet.

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We investigated the effects of elevated pCO2 in seawater both on the acute mortality and the reproductive properties of the benthic copepod Tigriopus japonicus and gastropod Babylonia japonica with the purpose of accumulating basic data for assessing potential environmental impacts of sub-sea geological storage of anthropogenic CO2 in Japan. Acute tests showed that nauplii of T. japonicus have a high tolerance to elevated pCO2 environments. Full life cycle tests on T. japonicus indicated NOEC = 5800 µatm and LOEC = 37,000 µatm. Adult B. japonica showed remarkable resistance to elevated pCO2 in the acute tests. Embryonic development of B. japonica showed a NOEC = 1500 µatm and LOEC = 5400 µatm. T. japonicus showed high resistance to elevated pCO2 throughout the life cycle and B. japonica are rather sensitive during the veliger stage when they started to form their shells.

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Das gegenwärtige Verständnis von multikultureller und viersprachiger Schweiz wird hier in seinen Paradoxien beleuchtet. Ein Perspektivenwechsel vom Assimilations- über das Ethnizitäts- zum Diversitätsparadigma in der Migrationsforschung wird am Beispiel dieser schweizerischen Problematik nachgezeichnet. Der Perspektivenwechsel ist auch in der theoretischen Diskussion über „interkulturelle Pädagogik" in vollem Gang, wie eine Reihe von Konzepterweiterungen in bezug auf Ziele, thematische Schwerpunkte, Klientel, in der Schweiz und den sie umgebenden Ländern zeigt. Doch die Umsetzung in bildungspolitische und pädagogische Strategien wird nach wie vor durch ideologische und materielle Hindernisse erschwert. Von dem Diversitätsparadigma und von einem erweiterten Begriff sprachlich-kultureller Minderheit ausgehend, und indem zwei von der „interkulturellen Pädagogik" suspendierte Grundsatzfragen (die Chancengerechtigkeit und die ethnische Entscheidung) in das Zentrum gerückt werden, skizziert die Verfasserin Optionen für eine Bildung in der sprachlich-kulturell pluralen, in Europa eingebetteten Schweiz. (DIPF/Orig.)