Search Results - (Author, Cooperation:M. Schilthuizen)

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  1. 1
    Staff View
    Publication Date:
    2015-08-13
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    *Altitude ; Animal Migration ; Animals ; *Biota ; Climate Change ; DNA Barcoding, Taxonomic ; Extinction, Biological ; Introduced Species/*statistics & numerical data ; Malaysia ; Molecular Sequence Data ; *Phylogeny ; *Phylogeography ; Plants/classification/genetics ; Time Factors ; *Tropical Climate
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    ISSN:
    1570-7458
    Keywords:
    Uscana lariophaga ; Bruchidius atrolineatus ; Callosobruchus maculatus ; bruchid ; storage pests ; egg parasitoid ; biological control ; cowpea
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Notes:
    Abstract The stored-product bruchid pests,Callosobruchus maculatus (Fabricius) andBruchidius atrolineatus (Pic) cause considerable production losses in cowpea in West Africa.Uscana lariophage Steffan parasitizes the eggs of the bruchids both in the field and in storage. As chemical control of bruchids in traditional granaries is not appropriate for poor farmers, enhancement of the efficacy of the parasitoid by environmental manipulation has been investigated. The effect of temperature on the capacity ofU. lariophaga to parasitize eggs has been studied at eleven constant and three fluctuating temperatures within the range 10 to 45°C. Longevity of the female wasp decreased with increasing temperature. The rate of development increased linearly at temperatures from 17.5 to 35°C, but decreased from 35 to 40°C. Mortality of the developing wasp remained below 20% from 20 to 37.5°C, but outside this range, mortality reached 100% at 15 at 42.5°C. Most parasitization occurred at temperatures of 25 and 30°C. Sex ratio (percentage females) increased with temperature in the high temperature range. The intrinsic rate of increase (rm) forU. lariophaga was highest in the temperature range from 30 to 37.5°C and was higher than that ofC. maculatus at all temperatures. While the rm value ofC. maculatus did not vary much at temperatures from 25 to 35°C, the rm value of the wasp doubled. Relative humidity did not effect longevity, egg-laying capacity, mortality, development time and sex ratio of the wasps withC. maculatus as host. However, withB. atrolineatus as the host, development time and mortality increased at lower relative humidity levels. The results indicate that temperature is the major regulating factor on the parasitoid. As the type of storage structure and its location (sun or shade) affects the temperature inside the store, ways are being investigated of manipulating the storage environment through temperature regulation to increase the impact of the parasitoid.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02380630

    Articles: DFG German National Licenses
  3. 3
    Schilthuizen M, Sipman I, Zwaan H.
    Oxford University Press
    Published 2018
    Staff View
    Publication Date:
    2018-03-06
    Publisher:
    Oxford University Press
    Print ISSN:
    0260-1230
    Electronic ISSN:
    1464-3766
    Topics:
    Biology
    Published by:
    http://global.oup.com/

    Latest Papers from Table of Contents or Articles in Press
  4. 4
    Staff View
    Publication Date:
    2018-05-16
    Publisher:
    National Academy of Sciences
    Print ISSN:
    0027-8424
    Electronic ISSN:
    1091-6490
    Topics:
    Biology
    Medicine
    Natural Sciences in General
    Published by:
    http://www.nasonline.org/

    Latest Papers from Table of Contents or Articles in Press