The succession and development of insects on pig carcasses and their significances in estimating PMI in south China
The succession and development of insects on pig carcasses and their significances in estimating PMI in south China
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DOI：
10.1016/j.forsciint.2008.04.014
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发表时间：
2008-07-18
影响因子：
2.2
通讯作者：
Yin, Xiaohong
中科院分区：
文献类型：
--
作者：
Wang, Jiangfeng;Li, Zhigang;Yin, Xiaohong
腐肉上昆虫群落的演替在局部和全球空间尺度上各不相同。因此，从一个地理位置的尸体获得的生态演替数据不一定适用于其他地点。我们的研究描述了这一继承在遥远的中国南部地区提供这样的数据在这一地区的法医案件。在四个季节共放置了18头猪尸体，并记录了以下事件的时间：幼虫的出现，幼虫游走的开始，当大多数幼虫已经游走，开始化蛹，当大多数幼虫已经化蛹，开始羽化和羽化结束。结果表明，所有评价事件均可作为死亡时间（PMI）的准确指标。尸体腐烂相当快，在春季，夏季和秋季，需要225 +/- 75小时，183 +/- 44小时，和247 +/- 70小时，分别从新鲜阶段腐烂到腐烂。在冬季，尸体需要更长的时间（1180 +/- 291）才能腐烂。尸体吸引了47种昆虫，其中苍蝇占主导地位。幼虫主要为大头蝇、红相蝇和棘胸水蝇。尸食性昆虫以全年最多，除冬季无斑革螨外，四季种类差异不显著。苍蝇只产生一代的尸体之前，它成为prononised，这简化了PMI的估计。(C)2008爱思唯尔爱尔兰有限公司保留所有权利。
The succession of insect communities on carrion varies at local and global spatial scales. As such, ecological succession data obtained from corpses at one geographic location cannot necessarily be applied to other locations. Our study describes this succession in the far southern part of China to provide such data for forensic cases in this region. A total of 18 pig carcasses were placed in the field in four seasons, and the timing of the following events were recorded: appearance of larvae, onset of larval wandering, when most larvae had wandered, onset of pupariation, when most larvae had pupariated, onset of eclosion and end of eclosion. Our results indicated that all of the evaluated events could be used as accurate indicators of postmortem interval (PMI). The carcasses decayed fairly quickly in spring, summer and autumn, taking 225 +/- 75 h, 183 +/- 44 h, and 247 +/- 70 h, respectively, to decay from the fresh stage to skeletonisation. In winter, carcasses needed longer (1180 +/- 291) to decay as much. Carcasses attracted 47 species of insect, with flies predominating. The larvae were mainly Chrysomya megacephala (Fabricius), Chrysomya rufifacies (Macquart) and Hydrotaea (Ophyra) spinigera (Stein). Most necrophagous insects were found all year around, and there were no marked differences in species among the four seasons, except that Dermestes maculatus (De Geer) was absent in winter. Blowflies produced only one generation on a carcass before it became skeletonised, which simplified the estimation of PMIs. (C) 2008 Elsevier Ireland Ltd. All rights reserved.