Laboratory of Criminalistics, Adam Mickiewicz University, Św. Marcin 90, 61-809, Poznań, Poland.
Center for Advanced Technologies, Adam Mickiewicz University, Uniwersytetu Poznańskiego 10, 61-614, Poznań, Poland.
Sci Rep. 2022 Jun 11;12(1):9689. doi: 10.1038/s41598-022-13901-y.
Analysis of insects can provide evidence in death cases, for example, by answering the question about the time of death. Apart from flies, beetles are the second most useful insect group in forensic entomology. To elucidate the time of death based on insect evidence, developmental models of a given species are necessary. In this study, we developed such models for Necrodes littoralis, a necrophagous beetle, which is common in the Palearctic region and has great potential in forensic entomology. We monitored the development at 10 constant temperatures (14-30 °C). Larvae were reared in aggregations. Thermal summation models, isomorphen and isomegalen diagrams and growth curves were derived using the data. Depending on the temperature, development lasted between about 23 and 89 days. Mortality was high at the extremes of the temperature range. The thermal summation constant for the total development was 434.7 ± 28.86 accumulated degree-days above a developmental threshold of 9.04 ± 0.55 °C. This is the first comprehensive dataset on the development of N. littoralis. Implications for its use in forensic casework are discussed.
昆虫分析可为死亡案例提供证据，例如，通过回答死亡时间的问题。除了蝇类之外，鞘翅目昆虫是法医昆虫学中第二大有用的昆虫群。为了根据昆虫证据阐明死亡时间，需要特定物种的发育模型。在这项研究中，我们为在古北区很常见且在法医昆虫学中具有巨大潜力的腐食性甲虫 Necrodes littoralis 开发了这样的模型。我们在 10 个恒定温度（14-30°C）下监测了发育情况。幼虫在聚集状态下被饲养。使用数据得出了热总和模型、等变和等大图谱以及生长曲线。根据温度的不同，发育时间在大约 23 到 89 天之间。在温度范围的极端处死亡率很高。总发育的热总和常数为 434.7±28.86 个积累度日，超过了 9.04±0.55°C 的发育阈值。这是关于 N. littoralis 发育的第一个综合数据集。讨论了其在法医案件工作中的应用。
