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  • Antipredator strategy  (1)
  • BARE-1 retrotransposon Barley Net blotch resistance Linkage mapping Quantitative trait locus (QTL)  (1)
  • Electromagnetic flow probes  (1)
  • Extinction  (1)
  • 2000-2004  (1)
  • 1985-1989  (3)
Collection
Keywords
Publisher
Years
  • 2000-2004  (1)
  • 1985-1989  (3)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Microhabitat selection as an antipredator strategy in the aquatic insect Pachydiplax longipennis Burmeister (Odonata: Libellulidae) (1987)
    Springer
    Oecologia 71 (1987), S. 185-189 
    Details
    ISSN: 1432-1939
    Keywords: Odonata ; Antipredator strategy ; Pachydiplax ; Sagittaria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary An investigation of the larval dragonfly fauna associated with the plant, Sagittaria platyphylla, was conducted in a small pond. Despite the presence of several larval anisopteran species in the pond, only Pachydiplax longipennis larvae were found on Sagittaria plants. A study of the microspatial distribution of P. longipennis larvae on S. platyphylla indicated that larvae use the various regions of a plant in a highly non-random fashion. Larvae show a strong preference for the leaf axil area. A generalized predator, the bluegill sunfish (Lepomis macrochirus), was allowed to selectively eat either of two larvae placed in various plant regions. This experiment indicated that larvae in a leaf axil area were significantly less susceptible to bluegill predation than larvae positioned in other plant regions. The microspatial distribution of starved larvae revealed that larvae with high hunger levels occupied the leaf axil area significantly less than well fed larvae, suggesting 1) larvae do not use these regions as feeding sites, and 2) high hunger levels may induce a behavioral shift in habitat use, with starved larvae forced into areas of high predation risk by the need to fulfill nutritional requirements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377283
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  • 2
    Electronic Resource
    Electronic Resource
    The controlled assembly of microcosmic communities: the selective extinction hypothesis (1986)
    Springer
    Oecologia 71 (1986), S. 12-17 
    Details
    ISSN: 1432-1939
    Keywords: MacArthur ; Wilson ; Equilibrium model ; Community assembly ; Extinction ; Colonization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Forty communities were assembled through the controlled inoculation of algae, protozoans and a rotifer according to either of 2 distinct introduction schedules. These introduction schedules were constructed such that species reinvaded on average either every 6 or 8 w. Ten of the 20 beakers experiencing each invasion schedule contained 300 ml of media; the remaining beakers in each invasion category contained 100 ml of media. Species richness consistently increased throughout the initial 4 w and 7 w of the experiment for the low and high invasion rate beakers, respectively. The numbers of species in the low rate beakers were uncorrelated with time during the last half of the experiment; however, species richness gradually declined during this period in the high rate beakers. The extinction rate is shown to be disproportionately higher for large organisms in the small microcosms. Such “selective extinction” is consistent with the MacArthur-Wilson equilibrium model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377313
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  • 3
    Electronic Resource
    Electronic Resource
    Application of BARE-1 retrotransposon markers to the mapping of a major resistance gene for net blotch in barley (2000)
    Springer
    Molecular genetics and genomics 264 (2000), S. 325-334 
    Details
    ISSN: 1617-4623
    Keywords: BARE-1 retrotransposon Barley Net blotch resistance Linkage mapping Quantitative trait locus (QTL)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. Net blotch, which is caused by the fungus Pyrenophora teres Drechs. f. teres Smedeg., presents a serious problem for barley production worldwide, and the identification and deployment of sources of resistance to it are key objectives for many breeders. Here, we report the identification of a major resistance gene, accounting for 65% of the response variation, in a cross between the resistant line CI9819 and the susceptible cv. Rolfi. The resistance gene was mapped to chromosome 6H with the aid of two recently developed systems of retrotransposon-based molecular markers, REMAP and IRAP. A total of 239 BARE-1 and Sukkula retrotransposon markers were mapped in the cross, and the 30-cM segment containing the locus with significant resistance effect contained 26 of the markers. The type and local density of the markers should facilitate future map-based cloning of the resistance gene as well as manipulation of the resistance through backcross breeding.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004380000326
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  • 4
    Electronic Resource
    Electronic Resource
    Minimising stimulator artefacts in electromagnetic flow signals (1988)
    Springer
    Medical & biological engineering & computing 26 (1988), S. 17-19 
    Details
    ISSN: 1741-0444
    Keywords: Cardiac pacing ; Electromagnetic flow probes ; Stimulation artefact
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Simultaneous electrical stimulation of tissue with the measurement of blood flow using an electromagnetic flowmeter system almost invariably results in large flow measurement inaccuracies. These inaccuracies are because the electrical energy from stimulating artefacts is amplified along with the flow signals. The paper describes the building and use of an inexpensive circuit to remove stimulation artefacts from electromagnetic flow measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02441822
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