Observations on the Thermal Relations of Western Australian Lizards

Light, Paul D.; Dawson, William R.; Shoemaker, Vaughan H.; Main, A. R.

doi:10.2307/1440766

Cited by 221 publications

(113 citation statements)

References 10 publications

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“…Thermal preferences are typically estimated from the distribution of body temperatures of animals in a laboratory thermal gradient (Licht et al, 1966). Prior studies have implicitly assumed that the distribution of body temperatures reflects only the organism's thermal preference and is thus not is not influenced by food quality.…”

Section: Temperature-dependent Locomotion In Microscopic Ectothermsmentioning

confidence: 99%

“…Moreover, many ectotherms manipulate time of activity, habitat choice and posture in an attempt to achieve body temperatures, T b , in narrow preferred (or 'selected') ranges (Cowles and Bogert, 1944;Heath, 1965;Huey et al, 1977;Christian et al, 1983;Stevenson, 1985;Kingsolver, 1987) and thereby increase the amount of time spent at physiologically optimal temperatures (Christian and Tracy, 1981;Huey, 1983;Kingsolver and Watt, 1983;Waldschmidt and Tracy, 1983;Huey et al, 1989;Hertz et al, 1993;Angilletta et al, 2002;Huey et al, 2003). Thermal preferences are usually measured by placing individuals in laboratory thermal gradients and then determining the distribution of their T b (Licht et al, 1966;DeWitt and Friedman, 1979;Crawshaw, 1980). This distribution is assumed to represent the preferred or selected (Pough and Gans, 1982) temperature of the population.…”

Section: Introductionmentioning

confidence: 99%

“…These concerns are generally insignificant for gradient studies with vertebrate ectotherms such as lizards (Licht et al, 1966;Bennett and John-Alder, 1986;Angilletta et al, 2002), snakes (Huey et al, 1989;Blouin-Demers and Weatherhead, 2001) and fish (Beitinger and Fitzpatrick, 1979;Reynolds and Casterlin, 1979;Crawshaw, 1980). These ectotherms are large and thus have considerable thermal inertia (Spotila et al, 1973;Stevenson, 1985;Christian et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Thermal preference ofCaenorhabditis elegans: a null model and empirical tests

Anderson

Albergotti

Proulx

et al. 2007

Journal of Experimental Biology

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SUMMARY The preferred body temperature of ectotherms is typically inferred from the observed distribution of body temperatures in a laboratory thermal gradient. For very small organisms, however, that observed distribution might misrepresent true thermal preferences. Tiny ectotherms have limited thermal inertia, and so their body temperature and speed of movement will vary with their position along the gradient. In order to separate the direct effects of body temperature on movement from actual preference behaviour on a thermal gradient, we generate a null model (i.e. of non-thermoregulating individuals)of the spatial distribution of ectotherms on a thermal gradient and test the model using parameter values estimated from the movement of nematodes(Caenorhabditis elegans) at fixed temperatures and on a thermal gradient. We show that the standard lab strain N2, which is widely used in thermal gradient studies, avoids high temperature but otherwise does not exhibit a clear thermal preference, whereas the Hawaiian natural isolate CB4856 shows a clear preference for cool temperatures (∼17°C). These differences are not influenced substantially by changes in the starting position of worms in the gradient, the natal temperature of individuals or the presence and physiological state of bacterial food. These results demonstrate the value of an explicit null model of thermal effects and highlight problems in the standard model of C. elegans thermotaxis, showing the value of using natural isolates for tests of complex natural behaviours.

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Section: Temperature-dependent Locomotion In Microscopic Ectothermsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal preference ofCaenorhabditis elegans: a null model and empirical tests

Anderson

Albergotti

Proulx

et al. 2007

Journal of Experimental Biology

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“…Accordingly, under the absence of environmental limitations, it chooses body temperatures maximizing its lifetime reproductive success (Magnuson et al, 1979). For decades, these temperatures have been well known to thermal ecologists as preferred body temperatures (T pref ) (Fry, 1958;Licht et al, 1966;Hutchison and Hill, 1976;Dillon et al, 2009). Indeed, some studies have demonstrated that T pref maximize population growth (Martin and Huey, 2008).…”

Section: Introductionmentioning

confidence: 99%

Economic thermoregulatory response explains mismatch between thermal physiology and behavior in newts

Gvoždı́k

Kristín

2017

Journal of Experimental Biology

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Temperature is an important factor determining distribution and abundance of organisms. Predicting the impact of warming climate on ectotherm populations requires information about species' thermal requirements, i.e. their so-called 'thermal niche'. The characterization of thermal niche remains a complicated task. We compared the applicability of two indirect approaches, based on reaction norm (aerobic scope curve) and optimality (preferred body temperature) concepts, for indirect estimation of thermal niche while using newts, Ichthyosaura alpestris, as a study system. If the two approaches are linked, then digesting newts should keep their body temperatures close to values maximizing aerobic scope for digestion. After feeding, newts maintained their body temperatures within a narrower range than did hungry individuals. The range of preferred body temperatures was well below the temperature maximizing aerobic scope for digestion. Optimal temperatures for factorial aerobic scope fell within the preferred body temperature range of digesting individuals. We conclude that digesting newts prefer body temperatures that are optimal for the maximum aerobic performance but relative to the maintenance costs. What might be termed the 'economic' thermoregulatory response explains the mismatch between thermal physiology and behaviour in this system.

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“…Так, критические температуры тела могут быть подвержены определенным сезонным изменениям. Они зависят от той температуры, при которой испытуемых животных содержали до опыта (Kour, Hutchison, 1970;Licht et al, 1966;и др.). В этих цитированных работах описаны опыты, которые были поставлены на четырех видах ящериц при трех уровнях температурной акклимации: 15, 25 и 35°.…”

Section: регуляция основных сезонных физиологических циклов рептилий unclassified

Heat adaptations in reptiles and the mechanism of their formation

Cherlin¹

2015

Principles of the Ecology

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Observations on the Thermal Relations of Western Australian Lizards

Cited by 221 publications

References 10 publications

Thermal preference ofCaenorhabditis elegans: a null model and empirical tests

Thermal preference ofCaenorhabditis elegans: a null model and empirical tests

Economic thermoregulatory response explains mismatch between thermal physiology and behavior in newts

Heat adaptations in reptiles and the mechanism of their formation

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