Interpopulational variation in recovery time from chill coma along a geographic gradient: A study in the common woodlouse, Porcellio laevis

Castañeda, Luis E.; Lardies, Marco A.; Bozinovic, Francisco

doi:10.1016/j.jinsphys.2005.08.005

Cited by 69 publications

(77 citation statements)

References 35 publications

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“…Those animals that exhibited a complete loss of righting response under extreme temperatures were considered to be in a thermal coma (e.g. Castañeda et al, 2005;Gaitán-Espitia et al, 2013;Lutterschmidt and Hutchison, 1997). Tolerance ranges were determined experimentally a priori.…”

Section: Thermal Coma and Thermal Tolerancessupporting

confidence: 72%

“…Overall, thermal comas were defined as the lack of ability to achieve an upright position, or lack of movement of structures and/or appendices within a pre-defined time period (e.g. Bacigalupe et al, 2007;Castañeda et al, 2005;Gaitán-Espitia et al, 2013;Lutterschmidt and Hutchison, 1997). This measure is sub-lethal and is useful for a broad range of ectothermic invertebrates and large sizes samples (Huey et al, 1992).…”

Section: Thermal Coma and Thermal Tolerancesmentioning

confidence: 74%

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Geographic variation in thermal physiological performance of the intertidal crabPetrolisthes violaceusalong a latitudinal gradient

Gaitán‐Espitía

Bacigalupe

Opitz

et al. 2014

Journal of Experimental Biology

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Environmental temperature has profound effects on the biological performance and biogeographical distribution of ectothermic species. Variation of this abiotic factor across geographic gradients is expected to produce physiological differentiation and local adaptation of natural populations depending on their thermal tolerances and physiological sensitivities. Here, we studied geographic variation in whole-organism thermal physiology of seven populations of the porcelain crab Petrolisthes violaceus across a latitudinal gradient of 3000 km, characterized by a cline of thermal conditions. Our study found that populations of P. violaceus show no differences in the limits of their thermal performance curves and demonstrate a negative correlation of their optimal temperatures with latitude. Additionally, our findings show that high-latitude populations of P. violaceus exhibit broader thermal tolerances, which is consistent with the climatic variability hypothesis. Interestingly, under a future scenario of warming oceans, the thermal safety margins of P. violaceus indicate that lower latitude populations can physiologically tolerate the ocean-warming scenarios projected by the IPCC for the end of the twenty-first century.

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Section: Thermal Coma and Thermal Tolerancessupporting

confidence: 72%

Section: Thermal Coma and Thermal Tolerancesmentioning

confidence: 74%

Geographic variation in thermal physiological performance of the intertidal crabPetrolisthes violaceusalong a latitudinal gradient

Gaitán‐Espitía

Bacigalupe

Opitz

et al. 2014

Journal of Experimental Biology

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“…At low temperatures, insects enter chill-coma, a reversible state of paralysis (3). The time taken to recover from this paralysis (chill-coma recovery time, CCR) is one of the most common metrics of insect cold tolerance (4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22) and has been used to develop and test theory in biogeography (5-9), evolution (10), and climate change biology (11,12). Variation in CCR reflects variation in low temperature exposure in the wild; for example, CCR is faster in individuals collected from populations or species at higher altitudes or latitudes, suggesting selection for faster recovery in cooler environments (4,5).…”

mentioning

confidence: 86%

Reestablishment of ion homeostasis during chill-coma recovery in the cricketGryllus pennsylvanicus

MacMillan

Williams

Staples

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

152

151

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The time required to recover from cold-induced paralysis (chill-coma) is a common measure of insect cold tolerance used to test central questions in thermal biology and predict the effects of climate change on insect populations. The onset of chill-coma in the fall field cricket (Gryllus pennsylvanicus, Orthoptera: Gryllidae) is accompanied by a progressive drift of Na + and water from the hemolymph to the gut, but the physiological mechanisms underlying recovery from chill-coma are not understood for any insect. Using a combination of gravimetric methods and atomic absorption spectroscopy, we demonstrate that recovery from chill-coma involves a reestablishment of hemolymph ion content and volume driven by removal of Na + and water from the gut. Recovery is associated with a transient elevation of metabolic rate, the time span of which increases with increasing cold exposure duration and closely matches the duration of complete osmotic recovery. Thus, complete recovery from chill-coma is metabolically costly and encompasses a longer period than is required for the recovery of muscle potentials and movement. These findings provide evidence that physiological mechanisms of hemolymph ion content and volume regulation, such as ion-motive ATPase activity, are instrumental in chill-coma recovery and may underlie natural variation in insect cold tolerance.ionoregulation | metabolism | osmotic homeostasis | thermal limits | stress resistance

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“…the time until regaining mobility following a chill coma; e.g. Castañeda et al 2005;Karl et al 2008a) was determined. For testing, the butterflies from the different treatment groups were placed individually in small translucent plastic cups (125 ml) and arranged on a tray in a randomized block design.…”

Section: Experimental Designmentioning

confidence: 99%

Assay conditions in laboratory experiments: is the use of constant rather than fluctuating temperatures justified when investigating temperature-induced plasticity?

et al. 2011

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Temperature is an important selective agent in nature. Consequently, temperature-induced plasticity which may help buffering detrimental effects of temperature variation has received considerable attention over recent decades. Laboratory studies have almost exclusively used constant temperatures, while in nature, temperature typically shows pronounced daily fluctuations. Using a factorial design with constant versus fluctuating temperatures and a higher versus a lower mean temperature, we here investigate in the butterfly Lycaena tityrus whether the use of constant temperatures is justified. Fluctuating compared to constant temperatures caused shorter development times, increased heat but decreased cold stress resistance, decreased heat-shock protein expression, and increased immunocompetence. Thus, overall, fluctuating temperatures were more beneficial to the butterflies compared to constant ones. However, despite substantial variation across temperature regimes, the ranking of trait values among treatments remained largely unaffected (e.g. lower constant as well as fluctuating temperatures caused increased pupal mass). Thus, we tentatively conclude that there is no general reason for concern about using constant temperatures in studies investigating phenotypic plasticity, which seem to comprise a fair proxy. However, substantial differences in mean values as well as interactive effects suggest that one needs to be cautious. We further demonstrate negative effects of high temperatures on butterfly immune function, which seem to result from a trade-off between the latter and the heat shock response.

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Interpopulational variation in recovery time from chill coma along a geographic gradient: A study in the common woodlouse, Porcellio laevis

Cited by 69 publications

References 35 publications

Geographic variation in thermal physiological performance of the intertidal crabPetrolisthes violaceusalong a latitudinal gradient

Geographic variation in thermal physiological performance of the intertidal crabPetrolisthes violaceusalong a latitudinal gradient

Reestablishment of ion homeostasis during chill-coma recovery in the cricketGryllus pennsylvanicus

Assay conditions in laboratory experiments: is the use of constant rather than fluctuating temperatures justified when investigating temperature-induced plasticity?

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