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  • Wiley-Blackwell  (79,141)
  • Blackwell Publishing Ltd  (36,056)
  • 1980-1984  (63,529)
  • 1975-1979  (51,668)
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Year
  • 1
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    Respiration and the effects of pressure on the mesopelagic vertically migrating squid Histioteuthis heteropsis (1978)
    Wiley-Blackwell
    In:  Limnology and Oceanography, 23 (4). pp. 735-739.
    Details
    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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    The effects of salinity and temperature on the development and survival of fish parasites (1978)
    Wiley-Blackwell
    In:  Journal of Fish Biology, 12 (4). pp. 311-323.
    Details
    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
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  • 3
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    Evidence for exploitative interspecific competition in mud snails (Hydrobiidae) (1976)
    Wiley-Blackwell
    In:  Oikos, 27 (3). pp. 367-376.
    Details
    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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    Habitat Selection and Life Cycle Characteristics of Five Species of the Amphipod Genus Gammarus in the Baltic (1981)
    Wiley-Blackwell
    In:  Oikos, 37 (2). p. 173.
    Details
    Publication Date: 2015-10-06
    Type: Article , PeerReviewed
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  • 5
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    Habitat Selection and Distribution Patterns of Five Species of the Amphipod Genus Gammarus (1979)
    Wiley-Blackwell
    In:  Oikos, 33 (2). pp. 316-322.
    Details
    Publication Date: 2015-10-06
    Type: Article , PeerReviewed
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  • 6
    Electronic Resource
    Electronic Resource
    SPACE AND TIME COMPARISONS OF PURCHASING POWER PARITIES AND REAL VALUES (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Review of income and wealth 30 (1984), S. 0 
    Details
    ISSN: 1475-4991
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: The calculation of purchasing power parities and quantity comparisons for a given year provides interesting information about the relative importance of countries. However, it is necessary to make these estimates annually in order to enable users to apply these parities for international comparison of annual data expressed in national currency. The paper deals with the problems related to merging spatial comparisons and temporal volume and price movements for the countries of the European Community. For these countries full information was collected in 1975 and in 1980, whereas in the intermediate years some price data were collected and price indices at a detailed level have also been collected. First the theoretical problems of consistency between the spatial results and temporal indices are discussed. Because no immediate consistency can be obtained, several methods are proposed to achieve consistency, by estimating one unique set of spatial and temporal indices. The available information for the period 1975-80 has been used in order to test the numerical differences between two sets of parities and price indices over time. Besides theoretical reasons for inconsistency, it is also necessary to take into account errors in the price observations or in the price indices. The results presented in the paper should be considered as provisional and further work will be undertaken to obtain better insights into the inconsistency between these sets of data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-4991.1984.tb00477.x
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  • 7
    Electronic Resource
    Electronic Resource
    THE HIDDEN ECONOMY: STATE AND PROSPECTS FOR MEASUREMENT (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Review of income and wealth 30 (1984), S. 0 
    Details
    ISSN: 1475-4991
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: To know the size and development of the hidden or underground economy is important for policy making, mainly because the measures undertaken may be misdirected if they are based on biased official statistics. The hidden economy can be measured by considering indicators. The direct methods are based on voluntary surveys and on tax auditing and other compliance methods. The indirect estimation methods rely on the identification of residuals with respect to income and expenditures, as well as in the labor and money markets. The strengths and weaknesses of each of these measurement approaches are discussed and the resulting estimates of the size of the hidden economy are compared. A different approach to measurement is to look at the determinants leading to the existence and growth of the hidden economy. Finally, the method of “unobserved variables” allows the combination of the two approaches by simultaneously considering the determinants and indicators of the under- ground economy. The results show a considerable range of sizes for a given country and year. Though there is a broad range of size estimates, there is general agreement that the hidden economy's size has been growing for all countries over recent decades. Further progress in quantitative knowledge about the hidden economy requires the development of a theoretical model which analyses the interdependencies between the official private sector, the hidden economy, and the public sector.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-4991.1984.tb00474.x
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  • 8
    Electronic Resource
    Electronic Resource
    DECOMPOSING THEIL'S INCOME OF INCOME INEQUALITY INTO BETWEEN AND WITHIN COMPONENTS: A NOTE (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Review of income and wealth 30 (1984), S. 0 
    Details
    ISSN: 1475-4991
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-4991.1984.tb00479.x
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  • 9
    Electronic Resource
    Electronic Resource
    THE TREATMENT OF PENSIONS AND INSURANCE IN NATIONAL ACCOUNTS (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Review of income and wealth 29 (1983), S. 0 
    Details
    ISSN: 1475-4991
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: In the course of the nearly two decades since the revised SNA was developed, the role of pensions and insurance in the developed western economies has been significantly altered. The United Nations System of National Accounts (SNA) is not fully consistent in its treatment of pension and insurance transactions. This paper examines whether, in view of the changed institutional context, a modification of the SNA treatment of this complex of flows would be desirable. It investigates the impact on household income and saving of adopting a somewhat more consistent transactor/transaction approach for all pension and insurance transactions. Four main topics are covered: (1) social security, (2) private pensions, (3) life insurance, and (4) casualty insurance. Each is considered in terms of the treatment of contributions, the treatment of benefits, and the handling of reserves and the income generated by them. The same sorts of problem arise in all four cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-4991.1983.tb00656.x
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  • 10
    Electronic Resource
    Electronic Resource
    POSSIBLE SOCIAL POLICY DEVELOPMENTS AND CORRESPONDING STATISTICAL REQUIREMENTS (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Review of income and wealth 29 (1983), S. 0 
    Details
    ISSN: 1475-4991
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: Production maximization, together with an appropriate distribution of income and wealth, can no longer be considered as the exclusive objective of socio-economic policies. Economic and social life is accompanied by numerous hardships, constraints and damages which demand to be minimized. Combining these dual aims is not easy as no single model has yet been set up taking into account all these inter-relations. However, one may try to reduce the uncertainty about the statistical material that could be required for decision-making in this new context.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-4991.1983.tb00633.x
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