1. Organisms may internally or behaviorally regulate their body temperatures or conform to the ambient air temperatures. Previous evidence is mixed on whether wing pigmentation influences thermoregulation in various odonates.
2. We investigated the thermal response of sympatric North American Calopteryx aequabilis and Calopteryx maculata with a thermal imaging study across a 25°C ambient temperature range.
3. We found that regressions of thorax temperature on ambient temperature standardized by species had similar slopes for male and female C. maculata, but females were consistently 1.5°C warmer than males. In contrast, the sexes of C. aequabilis differed in slope, with C. aequabilis females having a slope less than 1.0 and males having a slope greater than 1.0.
4. We found that regressions of thorax temperature on ambient temperature standardized by sex had similar slopes for males and females of both species, but C. maculata females were consistently 2.1°C warmer than C. aequabilis females.
5. Given that C. aequabilis is strongly sexually dimorphic in pigment, but C. maculata is not, our findings suggest that wing pigmentation may influence thermal response rate in sympatric populations of both species.

中文翻译：

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在环境温度范围内，两个有性双态翼翅目（Odonata）的热响应

1. 有机体可能会在内部或行为上调节其体温或符合周围的空气温度。关于机翼色素沉着是否会影响各种耳酸盐的温度调节，已有证据不一。
2. 我们通过在25°C的环境温度范围内进行的热成像研究，研究了北美洲同翅类Calequyx aequabilis和Calopteryx maculata的热响应。
3. 我们发现，按物种标准化的胸温度对环境温度的回归对于雄性和雌性斑纹梭菌具有相似的斜率，但雌性始终比雄性高1.5°C。相反，马鞭草的性别在斜率上是不同的，马鞭草的雌性的斜率小于1.0，雄性的斜率大于1.0。
4. 我们发现在按性别标准化环境温度胸部的温度是回归有两个种类的男性和女性相似的斜率，但C.斑的女性是一贯2.1℃，温度超过C. aequabilis女性。
5. 鉴于C. aequabilis强烈颜料性别二态性，但C.斑是不是，我们的研究结果表明，翼色素沉着可能在这两个物种的同域种群影响热响应速度。