Life stage-related differences in hardening and acclimation of thermal tolerance traits in the kelp fly, Paractora dreuxi (Diptera, Helcomyzidae)
It is widely appreciated that physiological tolerances differ between life stages. However, few studies have examined stage-related differences in acclimation and hardening. In addition, the behavioural responses involved in determining the form and extent of the short-term phenotypic response are r...
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ftunstellenbosch:oai:scholar.sun.ac.za:10019.1/11275 2023-05-15T13:54:33+02:00 Life stage-related differences in hardening and acclimation of thermal tolerance traits in the kelp fly, Paractora dreuxi (Diptera, Helcomyzidae) Marais E. Terblanche J.S. Chown S.L. 2009 http://hdl.handle.net/10019.1/11275 https://doi.org/10.1016/j.jinsphys.2008.11.016 unknown acclimation age-related difference behavioral response developmental stage fly hardening heat shock ontogeny phenotypic plasticity temperature tolerance acclimatization animal article Indian Ocean larva life cycle physiology South Africa survival temperature Animals Diptera Indian Ocean Islands Life Cycle Stages Survival Analysis Coelopidae Helcomyzidae Paractora dreuxi Article 2009 ftunstellenbosch https://doi.org/10.1016/j.jinsphys.2008.11.016 2018-10-27T11:27:01Z It is widely appreciated that physiological tolerances differ between life stages. However, few studies have examined stage-related differences in acclimation and hardening. In addition, the behavioural responses involved in determining the form and extent of the short-term phenotypic response are rarely considered. Here, we investigate life stage differences in the acclimation and hardening responses of the survival of a standard heat shock (SHS) and standard low temperature (or cold) shock (SCS), and the crystallization temperature (or supercooling point, SCP) of adults and larvae of the sub-Antarctic kelp fly, Paractora dreuxi. These stages live in the same habitat, but differ substantially in their mobility and thus environmental temperatures experienced. Results showed that neither acclimation nor hardening affected the lower lethal limits in larvae or adults. Adults showed an increase in survival of upper lethal limits after low temperature acclimation, whilst larvae showed a consistent lack of response. The acclimation × hardening interaction significantly affected the SCP in adults, but no response to either acclimation or hardening was found in the larvae. This study further demonstrates the complexities of thermal tolerance responses in P. dreuxi. © 2009 Elsevier Ltd. All rights reserved. Article Article in Journal/Newspaper Antarc* Antarctic Stellenbosch University: SUNScholar Research Repository Antarctic Indian Journal of Insect Physiology 55 4 336 343 |
institution |
Open Polar |
collection |
Stellenbosch University: SUNScholar Research Repository |
op_collection_id |
ftunstellenbosch |
language |
unknown |
topic |
acclimation age-related difference behavioral response developmental stage fly hardening heat shock ontogeny phenotypic plasticity temperature tolerance acclimatization animal article Indian Ocean larva life cycle physiology South Africa survival temperature Animals Diptera Indian Ocean Islands Life Cycle Stages Survival Analysis Coelopidae Helcomyzidae Paractora dreuxi |
spellingShingle |
acclimation age-related difference behavioral response developmental stage fly hardening heat shock ontogeny phenotypic plasticity temperature tolerance acclimatization animal article Indian Ocean larva life cycle physiology South Africa survival temperature Animals Diptera Indian Ocean Islands Life Cycle Stages Survival Analysis Coelopidae Helcomyzidae Paractora dreuxi Marais E. Terblanche J.S. Chown S.L. Life stage-related differences in hardening and acclimation of thermal tolerance traits in the kelp fly, Paractora dreuxi (Diptera, Helcomyzidae) |
topic_facet |
acclimation age-related difference behavioral response developmental stage fly hardening heat shock ontogeny phenotypic plasticity temperature tolerance acclimatization animal article Indian Ocean larva life cycle physiology South Africa survival temperature Animals Diptera Indian Ocean Islands Life Cycle Stages Survival Analysis Coelopidae Helcomyzidae Paractora dreuxi |
description |
It is widely appreciated that physiological tolerances differ between life stages. However, few studies have examined stage-related differences in acclimation and hardening. In addition, the behavioural responses involved in determining the form and extent of the short-term phenotypic response are rarely considered. Here, we investigate life stage differences in the acclimation and hardening responses of the survival of a standard heat shock (SHS) and standard low temperature (or cold) shock (SCS), and the crystallization temperature (or supercooling point, SCP) of adults and larvae of the sub-Antarctic kelp fly, Paractora dreuxi. These stages live in the same habitat, but differ substantially in their mobility and thus environmental temperatures experienced. Results showed that neither acclimation nor hardening affected the lower lethal limits in larvae or adults. Adults showed an increase in survival of upper lethal limits after low temperature acclimation, whilst larvae showed a consistent lack of response. The acclimation × hardening interaction significantly affected the SCP in adults, but no response to either acclimation or hardening was found in the larvae. This study further demonstrates the complexities of thermal tolerance responses in P. dreuxi. © 2009 Elsevier Ltd. All rights reserved. Article |
format |
Article in Journal/Newspaper |
author |
Marais E. Terblanche J.S. Chown S.L. |
author_facet |
Marais E. Terblanche J.S. Chown S.L. |
author_sort |
Marais E. |
title |
Life stage-related differences in hardening and acclimation of thermal tolerance traits in the kelp fly, Paractora dreuxi (Diptera, Helcomyzidae) |
title_short |
Life stage-related differences in hardening and acclimation of thermal tolerance traits in the kelp fly, Paractora dreuxi (Diptera, Helcomyzidae) |
title_full |
Life stage-related differences in hardening and acclimation of thermal tolerance traits in the kelp fly, Paractora dreuxi (Diptera, Helcomyzidae) |
title_fullStr |
Life stage-related differences in hardening and acclimation of thermal tolerance traits in the kelp fly, Paractora dreuxi (Diptera, Helcomyzidae) |
title_full_unstemmed |
Life stage-related differences in hardening and acclimation of thermal tolerance traits in the kelp fly, Paractora dreuxi (Diptera, Helcomyzidae) |
title_sort |
life stage-related differences in hardening and acclimation of thermal tolerance traits in the kelp fly, paractora dreuxi (diptera, helcomyzidae) |
publishDate |
2009 |
url |
http://hdl.handle.net/10019.1/11275 https://doi.org/10.1016/j.jinsphys.2008.11.016 |
geographic |
Antarctic Indian |
geographic_facet |
Antarctic Indian |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_doi |
https://doi.org/10.1016/j.jinsphys.2008.11.016 |
container_title |
Journal of Insect Physiology |
container_volume |
55 |
container_issue |
4 |
container_start_page |
336 |
op_container_end_page |
343 |
_version_ |
1766260535284727808 |