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A model for the time–temperature–mortality relationship in the chill-susceptible beetle, Alphitobius diaperinus, exposed to fluctuating thermal regimes

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Title: A model for the time–temperature–mortality relationship in the chill-susceptible beetle, Alphitobius diaperinus, exposed to fluctuating thermal regimes
Authors: Colinet, H.1,2 herve.colinet@uclouvain.be, Lalouette, L.2, Renault, D.2
Source: Journal of Thermal Biology. Oct2011, Vol. 36 Issue 7, p403-408. 6p.
Subjects: Low temperatures, Time, Physiological effects of cold temperatures, Repairing, Beetles, Fluctuations (Physics), Cold adaptation, Mortality
Abstract: Abstract: Exposing insects to a fluctuating thermal regime (FTR) compared with constant low temperature (CLT) significantly reduces cold-induced mortality. The beneficial effects of FTR result from physiological repair during warming intervals. The duration and the temperature experienced during the recovery period are supposed to strongly impact the resulting cold survival; however, disentangling the effects of both recovery variables had not been broadly investigated. In this study, we investigate cold tolerance (lethal time, Lt50) of the polyphagous beetle Alphitobius diaperinus. We examined adult survival under various CLTs (0, 5, 10 and 15°C), and under 20 different FTR conditions, where the 0°C exposure alternated with various recovery temperatures (Rt) (5, 10, 15 and 20°C) combined with various recovery durations (Rds) (0.5, 1, 2, 3 and 4h). Under CLTs, Lt50 increased with temperature until no mortality occurred above the upper limit of cold injury zone (ULCIZ). Under FTRs, Lt50 increased with both Rt and Rd. The magnitude of the survival gain was clearly boosted when Rt was above the ULCIZ (at 20°C). Based on a data matrix of lethal times with multiple Rt×Rd combinations, a predictive model showed that cold survival increased exponentially with Rt and Rd. This model was subsequently validated with additional survival tests. We suggest that increasing recovery durations associated with optimal recovery temperatures eventually leads to a progressive chilling compensation. [Copyright &y& Elsevier]
Copyright of Journal of Thermal Biology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 65500116
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: A model for the time–temperature–mortality relationship in the chill-susceptible beetle, Alphitobius diaperinus, exposed to fluctuating thermal regimes
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  Data: <searchLink fieldCode="AR" term="%22Colinet%2C+H%2E%22">Colinet, H.</searchLink><relatesTo>1,2</relatesTo><i> herve.colinet@uclouvain.be</i><br /><searchLink fieldCode="AR" term="%22Lalouette%2C+L%2E%22">Lalouette, L.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Renault%2C+D%2E%22">Renault, D.</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Thermal+Biology%22">Journal of Thermal Biology</searchLink>. Oct2011, Vol. 36 Issue 7, p403-408. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Low+temperatures%22">Low temperatures</searchLink><br /><searchLink fieldCode="DE" term="%22Time%22">Time</searchLink><br /><searchLink fieldCode="DE" term="%22Physiological+effects+of+cold+temperatures%22">Physiological effects of cold temperatures</searchLink><br /><searchLink fieldCode="DE" term="%22Repairing%22">Repairing</searchLink><br /><searchLink fieldCode="DE" term="%22Beetles%22">Beetles</searchLink><br /><searchLink fieldCode="DE" term="%22Fluctuations+%28Physics%29%22">Fluctuations (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Cold+adaptation%22">Cold adaptation</searchLink><br /><searchLink fieldCode="DE" term="%22Mortality%22">Mortality</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: Exposing insects to a fluctuating thermal regime (FTR) compared with constant low temperature (CLT) significantly reduces cold-induced mortality. The beneficial effects of FTR result from physiological repair during warming intervals. The duration and the temperature experienced during the recovery period are supposed to strongly impact the resulting cold survival; however, disentangling the effects of both recovery variables had not been broadly investigated. In this study, we investigate cold tolerance (lethal time, Lt50) of the polyphagous beetle Alphitobius diaperinus. We examined adult survival under various CLTs (0, 5, 10 and 15°C), and under 20 different FTR conditions, where the 0°C exposure alternated with various recovery temperatures (Rt) (5, 10, 15 and 20°C) combined with various recovery durations (Rds) (0.5, 1, 2, 3 and 4h). Under CLTs, Lt50 increased with temperature until no mortality occurred above the upper limit of cold injury zone (ULCIZ). Under FTRs, Lt50 increased with both Rt and Rd. The magnitude of the survival gain was clearly boosted when Rt was above the ULCIZ (at 20°C). Based on a data matrix of lethal times with multiple Rt×Rd combinations, a predictive model showed that cold survival increased exponentially with Rt and Rd. This model was subsequently validated with additional survival tests. We suggest that increasing recovery durations associated with optimal recovery temperatures eventually leads to a progressive chilling compensation. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Thermal Biology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.jtherbio.2011.07.004
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      – Code: eng
        Text: English
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        PageCount: 6
        StartPage: 403
    Subjects:
      – SubjectFull: Low temperatures
        Type: general
      – SubjectFull: Time
        Type: general
      – SubjectFull: Physiological effects of cold temperatures
        Type: general
      – SubjectFull: Repairing
        Type: general
      – SubjectFull: Beetles
        Type: general
      – SubjectFull: Fluctuations (Physics)
        Type: general
      – SubjectFull: Cold adaptation
        Type: general
      – SubjectFull: Mortality
        Type: general
    Titles:
      – TitleFull: A model for the time–temperature–mortality relationship in the chill-susceptible beetle, Alphitobius diaperinus, exposed to fluctuating thermal regimes
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            NameFull: Colinet, H.
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            NameFull: Lalouette, L.
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            NameFull: Renault, D.
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            – D: 01
              M: 10
              Text: Oct2011
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              Y: 2011
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