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首页> 外文期刊>Copeia >Life in the Lizard Slow Lane: Gila Monsters Have Low Rates of Energy Use and Water Flux
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Life in the Lizard Slow Lane: Gila Monsters Have Low Rates of Energy Use and Water Flux

机译：蜥蜴慢车道中的生活：吉拉怪兽的能源使用率和水通量较低

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Field metabolic rates (FMR) and water influx rates (WIR) were measured in Gila Monsters (Heloderma suspectum) in the Mojave Desert of southern Nevada. Gila Monsters had rates of energy use that were less than half of those expected for lizards of their size, including species that live in arid habitats. Free-living Gila Monsters also had comparatively low water flux rates. The annual energy requirements of adult Gila Monsters averaged approximately 3,766 kJ, with twothirds of the total (2,533 kJ) allocated to activity while above ground, and one-third to resting metabolism (1,233 kJ; mostly while below ground). Unusually low rates of resting metabolism caused relative costs of activity to be high: compared to other lizards, Gila Monsters have among the highest proportional use of energy for activity, relative to total energy use. The average annual water expenditure of adults was approximately 775 mL, and lizards achieved positive mass balance by drinking rain water during the late summer monsoon season. Drinking may be critical in meeting annual water requirements. FMR and WIR differed between seasons but were both highest in early summer (mid-May through June), coinciding with the peak of foraging and breeding activities. Levels of above-ground activity significantly influenced both FMR and WIR, whereas body temperature while burrowed influenced only WIR, and body mass (over the range of 270 to 420 g) did not significantly influence either whole-animal FMR or WIR.
机译：在内华达州南部莫哈韦沙漠的吉拉怪兽（Heladerma believeum）中测量了田间代谢率（FMR）和水流入率（WIR）。吉拉怪兽的能源使用率不到预期的蜥蜴大小的一半，其中包括生活在干旱栖息地的物种。自由生活的吉拉怪物也具有较低的水通量率。成年的吉拉怪兽的年平均能量需求约为3,766 kJ，其中三分之二（2,533 kJ）分配给了地面以上的活动，而三分之一分配给了静止的新陈代谢（1,233 kJ;大部分位于地下）。异常低的静息代谢率导致相对较高的活动成本：与其他蜥蜴相比，吉拉怪兽具有相对于总能量消耗而言比例最高的活动能量消耗。成年人的年平均水消耗量约为775毫升，蜥蜴在夏季风季末通过喝雨水实现了正的质量平衡。喝水对于满足年度水需求可能至关重要。不同季节的FMR和WIR有所不同，但在夏季初（5月中旬至6月）均最高，与觅食和繁殖活动的高峰相吻合。地上活动水平显着影响FMR和WIR，而穴居时的体温仅影响WIR，而体重（270至420 g范围）对全动物FMR或WIR均无显着影响。

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