巴西南里奥格兰德州南部烧焦的尸体对 Chrysomya albiceps 和 Lucilia ochricornis(双翅目:Calliphoridae)出现概率的影响。

IF 2.2 3区 医学 Q1 MEDICINE, LEGAL
Rodrigo F. Kruger , Marcela M.G. Pédra , Laura dos Santos Fonseca , Diuliani Fonseca Morales , Gratchela Dutra Rodrigues , Marco Antonio Tonus Marinho
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Experimental models were subjected to level 2 (CG2) and 4 (CG4) burning according to the Crow-Glassman (CG) scale, ranging from fresh to skeletonization. Generalised Linear Models (GLM) with a Binomial distribution were used to evaluate the influence of decomposition time and experimental treatment on the probability of occurrence of each species. Additionally, survival analyses with the Weibull distribution were used to investigate how long it takes until the arrival of the first fly species in each experimental group. The results indicate that burning affects the probability of occurrence and colonisation time of the studied fly species. Although both species were affected by high degrees of burning, <em>Lucilia ochricornis</em> was more heavily affected than <em>Chrysomya albiceps.</em> This pattern was reflected in the time it took for the first occurrence of each fly species. In both cases, it took longer for flies to arrive at carcasses that had been more severely burnt. 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引用次数: 0

摘要

我们评估了烧焦的尸体对发现 Chrysomya albiceps(Wiedemann,1819 年)和 Lucilia ochricornis(Wiedemann,1830 年)(双翅目:Calliphoridae)的概率以及它们到达实验尸体所需的时间的影响。在法医鉴定中,这些物种是死后间隔期(PMI)的生物指标。本研究使用死胎猪尸体,分析了不同的焚烧程度如何影响这些物种的吸引和定殖水平。实验模型根据克劳-格拉斯曼(CG)等级标准进行了 2 级(CG2)和 4 级(CG4)焚烧,焚烧范围从新鲜到骨架化。采用二项分布的广义线性模型(GLM)来评估分解时间和实验处理对每种物种出现概率的影响。此外,还使用 Weibull 分布的生存分析来研究每个实验组中第一个苍蝇物种的出现需要多长时间。结果表明,焚烧影响了所研究苍蝇物种的出现概率和定殖时间。虽然两种苍蝇都会受到高强度焚烧的影响,但赭色琉璃苣(Lucilia ochricornis)受到的影响要比白菊蝇(Chrysomya albiceps)严重。这种模式反映在每种苍蝇首次出现所需的时间上。在这两种情况下,苍蝇到达烧毁程度更严重的尸体所需的时间都更长。对于 C. albiceps,CG4 组发现苍蝇的平均时间最长(Weibull,α = 79.9 小时),其次是 CG2 组(α = 65.6 小时)和对照组(α = 51.5 小时)。相比之下,CG2 组的赭鲎平均首次出现时间最长(α = 85.4 小时),其次是对照组(α = 49.1 小时)和 CG4 组(α = 54.4 小时)。本研究强调了在法医调查中考虑尸体是否被焚烧及其焚烧程度的重要性,因为这一变量会影响犯罪现场 PMI 估计的准确性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The impact of burnt carcass on the occurrence probability of Chrysomya albiceps and Lucilia ochricornis (Diptera: Calliphoridae) in southern Rio Grande do Sul, Brazil
We evaluated the impact of burnt carcasses on the probability of finding Chrysomya albiceps (Wiedemann, 1819) and Lucilia ochricornis (Wiedemann, 1830) (Diptera: Calliphoridae), and the time it took for them to arrive at the experimental carcasss. These species are biological indicators of the postmortem interval (PMI) in forensic scenarios. Using stillborn pig carcasses, this study analysed how different degrees of burning affect the level of attraction and colonisation by these species. Experimental models were subjected to level 2 (CG2) and 4 (CG4) burning according to the Crow-Glassman (CG) scale, ranging from fresh to skeletonization. Generalised Linear Models (GLM) with a Binomial distribution were used to evaluate the influence of decomposition time and experimental treatment on the probability of occurrence of each species. Additionally, survival analyses with the Weibull distribution were used to investigate how long it takes until the arrival of the first fly species in each experimental group. The results indicate that burning affects the probability of occurrence and colonisation time of the studied fly species. Although both species were affected by high degrees of burning, Lucilia ochricornis was more heavily affected than Chrysomya albiceps. This pattern was reflected in the time it took for the first occurrence of each fly species. In both cases, it took longer for flies to arrive at carcasses that had been more severely burnt. In the case of C. albiceps, the longest mean time until a fly was detected (Weibull, α = 79.9 h) happened in the CG4 group, followed by the CG2 group (α = 65.6 h) and the control group (α = 51.5 h). In contrast, for L. ochricornis, the longest mean first occurrence time (α = 85.4 h) was in CG2 group, followed by the Control (α = 49.1 h) and CG4 (α = 54.4 h) groups. This study emphasises the importance of considering whether or not a carcass was burnt and its degree of burning in forensic investigations, given that this variable can influence the accuracy of PMI estimation in crime scenes.
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来源期刊
Forensic science international
Forensic science international 医学-医学:法
CiteScore
5.00
自引率
9.10%
发文量
285
审稿时长
49 days
期刊介绍: Forensic Science International is the flagship journal in the prestigious Forensic Science International family, publishing the most innovative, cutting-edge, and influential contributions across the forensic sciences. Fields include: forensic pathology and histochemistry, chemistry, biochemistry and toxicology, biology, serology, odontology, psychiatry, anthropology, digital forensics, the physical sciences, firearms, and document examination, as well as investigations of value to public health in its broadest sense, and the important marginal area where science and medicine interact with the law. The journal publishes: Case Reports Commentaries Letters to the Editor Original Research Papers (Regular Papers) Rapid Communications Review Articles Technical Notes.
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