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  • Cold tolerance of four species of bark beetle (Coleoptera: Scolytidae) in North America.

    Author(s) : Lombardero, M. J.Ayres, M. P.Ayres, B. D.Reeve, J. D.

    Author Affiliation : Department of Biological Sciences, Dartmouth College, Hanover, NH 03755, USA.

    Journal article : Environmental Entomology 2000 Vol.29 No.3 pp.421-432 ref.88

    Abstract : We investigated the overwinteringoverwinteringSubject Category: Miscellaneous
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    biology of four temperate-latitude barkbarkSubject Category: Anatomical and Morphological Structures
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    barkSubject Category: Commodities and Products
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    beetles: Dendroctonus frontalisdendroctonus frontalisSubject Category: Organism Names
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    , Ips piniips piniSubject Category: Organism Names
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    , I. grandicollis
    , and I. perroti. All four species were freeze-susceptible. However, there was variation within and among species in overwintering biology that related to their geographic distribution. D. frontalis and southern populations of I. grandicollis continued to reproduce and develop under the bark of their host plants throughout the winter and did not show any seasonal adjustments in their lower lethal temperatures: mean supercooling point SD = -12.15±4.02 and -12.25±2.50°C. In contrast, northern populations of I. grandicollis and I. pini employ a behavioural strategy in which adults migrate to the forest soil, where they are insulated from temperaturetemperatureSubject Category: Properties
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    extremes by litter and snow. Furthermore, adult supercooling points of both northern populations declined from about -13°C in summer to about -17°C in early winter. A concomitant decline in lipid content suggests that lipid metabolismlipid metabolismSubject Category: Natural Processes
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    may be involved in seasonal adjustments of cold tolerancecold toleranceSubject Category: Properties
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    in I. pini. An assortment of temperature manipulations failed to provide any evidence of cold tolerance acclimation. Immatures, which remain in the inner bark of their host trees, have lower lethal temperatures of -5 to -12°C, and are especially vulnerable to mortality from freezingfreezingSubject Category: Techniques, Methodologies and Equipment
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    . I. perroti, a northerly distributed species, has similar cold tolerance and overwinter behaviour as northern populations of the other two Ips species. Winter mortality from freezing could be an important determinant of population dynamics in all four species. Understanding variations in cold tolerance and overwinter behaviour among insectsinsectsSubject Category: Organism Names
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    species may help predict population dynamics and distribution of potential pests.

    ISSN : 0046-225X

    DOI : 10.1603/0046-225X-29.3.421

    Record Number : 20013048239

    Publisher : Entomological Society of America

    Location of publication : Lanham

    Country of publication : USA

    Language of text : English

    Indexing terms for this abstract:

    Organism descriptor(s) : Dendroctonus frontalisdendroctonus frontalisSubject Category: Organism Names
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    , Ips grandicollisips grandicollisSubject Category: Organism Names
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    , Ips piniips piniSubject Category: Organism Names
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    Descriptor(s) : acclimatizationacclimatizationSubject Category: Miscellaneous
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    , barkbarkSubject Category: Commodities and Products
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    , cold tolerancecold toleranceSubject Category: Properties
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    , freezingfreezingSubject Category: Techniques, Methodologies and Equipment
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    , lipid metabolismlipid metabolismSubject Category: Natural Processes
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    , overwinteringoverwinteringSubject Category: Miscellaneous
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    , temperaturetemperatureSubject Category: Properties
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    Identifier(s) : bark beetles, fat metabolism, Ips perroti

    Broader term(s) : DendroctonusdendroctonusSubject Category: Organism Names
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    , ScolytidaescolytidaeSubject Category: Organism Names
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    , ColeopteracoleopteraSubject Category: Organism Names
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    , insectsinsectsSubject Category: Organism Names
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    , HexapodahexapodaSubject Category: Organism Names
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    , arthropodsarthropodsSubject Category: Organism Names
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    , invertebratesinvertebratesSubject Category: Organism Names
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    , animalsanimalsSubject Category: Organism Names
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    , eukaryoteseukaryotesSubject Category: Organism Names
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    , IpsipsSubject Category: Organism Names
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