Winter Survival and Freeze Tolerance in a Northern Cockroach, Periplaneta japonica(Blattidae : Dictyoptera)

    • Tanaka Kazuhiro Tanaka Kazuhiro
    • Department of Insect Physiology and Behavior, National Institute of Sericultural and Entomological Science (NISES) : Zoological Section, Institute of Low Temperature Science, Hokkaido University
    • Tanaka Seiji Tanaka Seiji
    • Department of Insect Physiology and Behavior, National Institute of Sericultural and Entomological Science (NISES)

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Abstract

Cold tolerance of overwintering nymphs of a cockroach, Periplaneta japonica, was examined in terms of the supercooling capacity and lower lethal temperature. The supercooling point of overwintering nymphs fell in a relatively narrow range of temperature from -6 to -9℃ and no correlation was observed between the supercooling point and body size. In the temperature range from -5 to -8℃, a significant proportion of cockroaches could tolerate a 12 hr period of tissue freezing. The freeze tolerance capacity differed between nymphal instars, but the supercooling capacity was similar for all nymphs. In a freezing trial at -6 and -7℃, none of the first instar nymphs recovered after tissue freezing, whereas many mid (from 3rd to 5th) and final (8th) instar nymphs survived freezing. Glucose, myo-inositol, scyllo-inositol and trehalose were found in overwintering nymphs, but neither the array nor the content except for trehalose differed among the nymphal instars. Unexpectedly, the concentration of trehalose was negatively correlated to freeze tolerance. Winter survival of this cockroach may be based on both the freeze tolerance and microhabitat selection.

Journal

Zoological science   [List of Volumes]

Zoological science 14(5), 849-853, 1997-10  [Table of Contents]

The Zoological Society of Japan

References:  23

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Cited by:  1

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Codes

  • NII Article ID (NAID) :
    110003323491
  • NII NACSIS-CAT ID (NCID) :
    AA10545874
  • Text Lang :
    ENG
  • Article Type :
    Journal Article
  • ISSN :
    02890003
  • NDL Article ID :
    4338064
  • NDL Source Classification :
    ZR4(科学技術--生物学--動物)
  • NDL Call No. :
    Z53-Y164
  • Databases :
    CJP  CJPref  NDL  NII-ELS