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  • Wiley-Blackwell  (36,058)
  • 1975-1979  (36,058)
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  • 1
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    Wiley-Blackwell
    In:  Limnology and Oceanography, 23 (4). pp. 735-739.
    Publication Date: 2020-11-05
    Description: The effects of hydrostatic pressure and dissolved oxygen concentration on oxygen consumption rates were examined in the mesopelagic, vertically migrating squid Histioteuthis heteropsis from southern California offshore waters. Elevated hydrostatic pressure (to 136 atm) had no significant effects on oxygen consumption rates at 5°C. Lox oxygen concentrations (〈0.5 ml O2 liter -1) depressed rates of oxygen consumption. These findings suggest that biosis may be necessary to supply the total nergy needs of this species at daytime depths in the oxygen minumum layer off southern California.
    Type: Article , PeerReviewed
    Format: text
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  • 2
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    Wiley-Blackwell
    In:  Journal of Fish Biology, 12 (4). pp. 311-323.
    Publication Date: 2017-07-11
    Description: In brackish water the variety of marine and freshwater parasite species is considerably reduced. The distribution in brackish water of most marine endoparasites is restricted by the salinity tolerance of their hosts, most of the parasite species are more tolerant than their hosts. The influence of salinity and temperature on nine species has been examined; first stage larvae of Contracaecum aduncum develop in 0-32‰ salinity; Cryptocotyle lingua proved to be infective at salinities down to 4‰. The greatest resistance was found in Anisakis larvae from herring Clupea harengus, which survived for more than half a year. Parasites in the fish intestines appear to be unaffected by changing water salinities, as the osmolarity in the intestines stays nearly constant. Marine ectoparasites (Acanthochondria depressa, Lepeophtheirus pectoralis) survive about three times longer than freshwater species (Piscicola geometra, Argulus foliaceus) when salinity is 16‰. High temperature increases the effects of adverse salinities on parasites. There is evidence that none of these ecto-parasitic species can develop within the range of 7-20‰ salinity.
    Type: Article , PeerReviewed
    Format: text
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  • 3
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    Wiley-Blackwell
    In:  Oikos, 27 (3). pp. 367-376.
    Publication Date: 2017-03-31
    Description: Some of the basic assumptions implied in the theory of limiting similarity of coexisting competitors were investigated experimentally in the case of three congeneric, deposit feeding snails. The species show character displacement with respect to size when coexisting. In experimental containers with a natural substrate, interspecific, exploitative competition between snails of the same size range is as intense as intraspecific competition. Diatoms of a given size range, which constitute the most important food, show a "logistic" growth response to grazing, and individual growth of the snails is linearly related to diatom density. The previous observation that the snails show size dependent selection for ingested particle sizes is extended to show that this mechanism leads to a real resource partitioning between snails of different sizes. Size frequency distribution of diatoms in the sediment is a function of the sizes of grazing snails. Size selection of ingested sand grains may also be significant for resource partitioning since the migration rate of the attached microflora between sand grains seems to be slow relative to its growth on the individual sand grains.
    Type: Article , PeerReviewed
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  • 4
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    Wiley-Blackwell
    In:  Oikos, 33 (2). pp. 316-322.
    Publication Date: 2015-10-06
    Type: Article , PeerReviewed
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 6 (1975), S. 35-35 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Stress Intensity Factors in the Neighbourhood of a Circular Hole and their Influence on Crack Behavior.A photoelastic method was developed to determine the stress intensity factors KI and KII for cracks subjected to mixed-mode loading. The constants in the near field expansion about the crack tip were computed using a non-linear optimization program to give a best fit to the observed isochromatics. Copying the latter onto an equal density film increased their sharpness and, thus, the accuracy of the determination. The method was applied to cracks lying perpendicular to the external stress near a circular hole in a plate under uniaxial tension and the results used to describe the paths of cracks in the neighbourhood of a hole.
    Notes: Es wurden Modellexperimente durchgeführt, um den Einfluß von Inhomogenitäten - wie etwa Poren oder Einschlüsse - auf das Bruchverhalten unter statischer Belastung zu untersuchen. Änderungen der Ausbreitungsrichtung eines Risses, verursacht durch die Wechselwirkung mit einem Kreisloch in einer einachsig belasteten Platte, wurden gemessen. Zum Verständnis der beobachteten Abweichungen wurden die Spannungsfaktoren KI und KII eines Risses in der Nähe eines Kreisloches in einer Platte spannungsoptisch bestimmt. Hierzu wurden die Isochromaten um eine Rißspitze durch Verwendung eines Äquidensitenfilmes photographisch verschärft und die erhaltenen Linien durch ein nicht-lineares Optimierungsprogramm an die Nahfeld-Lösung der Spannungsverteilung um eine Rißspitze angepaßt.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Experience with Water Heaters of Stainless Steel.Different stainless steels and their importance in the construction of domestic water heaters. Types of corrosion and their importance in water heating practice. Important aspects for manufacture. Experience gained with stainless steel water heaters.
    Notes: Die verschiedenen nichrtrostenden Stähle und ihre Bedeutung für den Bau von Warmwasserbereitern. Korrosionsarten bei nichtrostenden Stählen und ihre Bedeutung im Zusammenhang mit der Warmwasserbereitung. Wichtige Gesichtspunkte für die Fertigung. Bisherige praktische Erfahrungen mit Warmwasserbereitern aus nichtrostendem Stahl.
    Additional Material: 17 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 6 (1975), S. 70-72 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 6 (1975) 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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