Department of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo, Japan.
The United Graduate School of Agricultural Sciences, Ehime University, Ehime, Japan.
J Therm Biol. 2024 Aug;124:103962. doi: 10.1016/j.jtherbio.2024.103962. Epub 2024 Aug 26.
Adult size in numerous insects is strongly dependent on temperature. In several cases, a temperature-size rule is observed in which developmental temperature and adult size tradeoff. Although several previous studies have demonstrated the temperature-size rule, only a few have explored the relationship between developmental temperature and weapon traits or sexual size dimorphism. This study was conducted to investigate the size of the broad-horned flour beetle Gnatocerus cornutus when it was developed under different temperatures. G. cornutus males possess weapon traits for male-male combat and exhibit sexual size dimorphism in other morphological traits. Results showed that male weapon size and body size complied with the temperature-size rule. Furthermore, the extent of sex dimorphism in genae width, a weapon-supportive trait, were larger at lower temperatures. Our findings suggest that the temperature-size rule also influences the size of sexual traits.
在许多昆虫中，成虫体型强烈依赖于温度。在某些情况下，存在一种温度-体型规则，即发育温度和成虫体型之间存在权衡。尽管之前有几项研究已经证明了温度-体型规则的存在，但只有少数研究探索了发育温度与武器特征或性二型性之间的关系。本研究旨在探讨在不同温度下发育的宽角面粉甲虫 Gnatocerus cornutus 的体型。G. cornutus 雄性具有用于雄性间战斗的武器特征，并在其他形态特征上表现出性二型性。结果表明，雄性武器大小和体型符合温度-体型规则。此外，在较低温度下，支持武器的特征——触角宽度的性二型性程度更大。我们的研究结果表明，温度-体型规则也会影响性特征的大小。
