Bioenergetic modeling reveals that Chinese green tree vipers select postprandial temperatures in laboratory thermal gradients that maximize net energy intake

Tsai, Tein Shun; Lee, How‐Jing; Tu, Min

doi:10.1016/j.cbpa.2009.07.011

Cited by 8 publications

(10 citation statements)

References 49 publications

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“…Snakes given more opportunity to stay warm both attained larger sizes and grew more efficiently. This is congruent with the findings of Tsai et al (2009), who used bioenergetic modeling to show that Chinese green tree vipers (Trimeresurus stejnegeri) select postprandial thermal environments to maximize both rate of energy gain and efficiency of energy gain. [2]).…”

Section: Discussionsupporting

confidence: 76%

Developmental and Immediate Thermal Environments Shape Energetic Trade-Offs, Growth Efficiency, and Metabolic Rate in Divergent Life-History Ecotypes of the Garter SnakeThamnophis elegans

Gangloff

Vleck²,

Bronikowski³

2015

Physiological and Biochemical Zoology

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Interactions at all levels of ecology are influenced by the rate at which energy is obtained, converted, and allocated. Tradeoffs in energy allocation within individuals in turn form the basis for life-history theory. Here we describe tests of the influences of temperature, developmental environment, and genetic background on measures of growth efficiency and resting metabolic rate in an ectothermic vertebrate, the western terrestrial garter snake (Thamnophis elegans). After raising captive-born snakes from divergent life-history ecotypes on thermal regimes mimicking natural habitat differences (2 # 2 experimental design of ecotype and thermal environment), we measured oxygen consumption rate at temperatures spanning the activity range of this species. We found ecotypic differences in the reaction norms of snakes across the measured range of temperatures and a temperature-dependent allometric relationship between mass and metabolic rate predicted by the metabolic-level boundaries hypothesis. Additionally, we present evidence of within-individual trade-offs between growth efficiency and resting metabolic rate, as predicted by classic lifehistory theory. These observations help illuminate the ultimate and proximate factors that underlie variation in these interrelated physiological and life-history traits.

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Section: Discussionsupporting

confidence: 76%

Developmental and Immediate Thermal Environments Shape Energetic Trade-Offs, Growth Efficiency, and Metabolic Rate in Divergent Life-History Ecotypes of the Garter SnakeThamnophis elegans

Gangloff

Vleck²,

Bronikowski³

2015

Physiological and Biochemical Zoology

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“…The effect of temperature on SDA costs in L. latrans seems to conform to the generalized thermal reaction norm that is typical of ectothermic organisms, in which the performance of a given physiological trait initially increases with temperature up to an optimal level and, thereafter, declines (Angilletta, ; Bozinovic, Sabat, Rezende, & Canals, ; Sinclair et al, ). Assuming that optimal performance, including maximum energy intake during SDA (Coggan, Clissold, & Simpson, ; Tsai, Lee, & Tu, ), is often consistent with thermal preference (Angilletta et al, ; Huey, ), the optimal SDA performance of L. latrans (occurring within the 25–30°C interval) seems to be congruent with the preferred T b determined in a thermal gradient for the species (selected temperature = 26.2 ± 2.4°C, n = 14; DVA, unpublished data). The proximal determinants to explain the poorer digestive performance of L. latrans at higher temperatures than at intermediate temperatures are hard to isolate and may involve differences in the temperature‐mediated metabolic response among different organs systems between fast and fed physiological states (see Secor & Boehm, ).…”

Section: Discussionmentioning

confidence: 89%

Effects of temperature and meal size on the postprandial metabolic response of Leptodactylus latrans (Anura, Leptodactylidae)

2019

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The postprandial increment of metabolism, often referred to as specific dynamic action (SDA), encompasses the summed costs of meal ingestion, digestion, absorption, and assimilation. Different SDA parameters, such as its magnitude, duration, and relative cost, are affected by a diverse set of environmental and physiological determinants, including meal size and body temperature. While the influence of these variables has been thoroughly examined in most ectothermic vertebrate groups, few studies have focused on the determinants and consequences of the SDA response in anuran amphibians. Thus, we examined the effects of meal size and body temperature on the SDA response of a Neotropical frog, Leptodactylus latrans, by measuring the rates of oxygen consumption of frogs while fasting and after being fed meals of different sizes at different temperatures. SDA lasted from 3 to 5 days and increased with meal size for frogs fed meals equivalent to 5-15% of their body mass. SDA cost was not affected by meal size and averaged 14.6% of the caloric content of the meal. Temperature increment was accompanied by proportional increases in metabolic rateand shorter SDA duration. The relative SDA cost averaged 14.8% of the meal caloric content at 20°C and 25°C, but increased to 23.5% at 30°C. Our results indicate that meal size imposes no physiological or energetic constraint to L. latrans feeding.Digestion at temperatures near the thermal preference of the species seems to optimize energetic return, whereas the shortening of SDA duration at higher temperatures may provide significant ecological advantages. K E Y W O R D Sanurans, digestion, energetics, meal size, postprandial metabolic increment, temperature

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“…Gross rates at which nutrients are assimilated into growth rise with increasing temperature in ectotherms until a critical temperature, beyond which net nutrient assimilation declines because the conversion of absorbed food to biomass becomes energetically inefficient (e.g. fishes [14]; reptiles [5,15,16]; insects [5,12,13]). Thus, many ectotherms when starved select lower body temperatures as a means to conserve limiting energy (e.g.…”

Section: Introductionmentioning

confidence: 99%

Locusts use dynamic thermoregulatory behaviour to optimize nutritional outcomes

2011

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Because key nutritional processes differ in their thermal optima, ectotherms may use temperature selection to optimize performance in changing nutritional environments. Such behaviour would be especially advantageous to small terrestrial animals, which have low thermal inertia and often have access to a wide range of environmental temperatures over small distances. Using the locust, Locusta migratoria, we have demonstrated a direct link between nutritional state and thermoregulatory behaviour. When faced with chronic restrictions to the supply of nutrients, locusts selected increasingly lower temperatures within a gradient, thereby maximizing nutrient use efficiency at the cost of slower growth. Over the shorter term, when locusts were unable to find a meal in the normal course of ad libitum feeding, they immediately adjusted their thermoregulatory behaviour, selecting a lower temperature at which assimilation efficiency was maximal. Thus, locusts use fine scale patterns of movement and temperature selection to adjust for reduced nutrient supply and thereby ameliorate associated life-history consequences.

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Bioenergetic modeling reveals that Chinese green tree vipers select postprandial temperatures in laboratory thermal gradients that maximize net energy intake

Cited by 8 publications

References 49 publications

Developmental and Immediate Thermal Environments Shape Energetic Trade-Offs, Growth Efficiency, and Metabolic Rate in Divergent Life-History Ecotypes of the Garter SnakeThamnophis elegans

Developmental and Immediate Thermal Environments Shape Energetic Trade-Offs, Growth Efficiency, and Metabolic Rate in Divergent Life-History Ecotypes of the Garter SnakeThamnophis elegans

Effects of temperature and meal size on the postprandial metabolic response of Leptodactylus latrans (Anura, Leptodactylidae)

Locusts use dynamic thermoregulatory behaviour to optimize nutritional outcomes

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