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Pigs vs people: the use of pigs as analogues for humans in forensic entomology and taphonomy research
Open accessAbstract
Most studies of decomposition in forensic entomology and taphonomy have used non-human cadavers. Following the recommendation of using domestic pig cadavers as analogues for humans in forensic entomology in the 1980s, pigs became the most frequently used model cadavers in forensic sciences. They have shaped our understanding of how large vertebrate cadavers decompose in, for example, various environments, seasons and after various ante- or postmortem cadaver modifications. They have also been used to demonstrate the feasibility of several new or well-established forensic techniques. The advent of outdoor human taphonomy facilities enabled experimental comparisons of decomposition between pig and human cadavers. Recent comparisons challenged the pig-as-analogue claim in entomology and taphonomy research. In this review, we discuss in a broad methodological context the advantages and disadvantages of pig and human cadavers for forensic research and rebut the critique of pigs as analogues for humans. We conclude that experiments using human cadaver analogues (i.e. pig carcasses) are easier to replicate and more practical for controlling confounding factors than studies based solely on humans and, therefore, are likely to remain our primary epistemic source of forensic knowledge for the immediate future. We supplement these considerations with new guidelines for model cadaver choice in forensic science research.
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Matuszewski and colleagues recommend a minimum weight of 30 kg for pigs as human analogues in forensic entomology.
“Matuszewski and colleagues recommend a minimum weight of 30 kg in forensic entomology [28].”
From Forensic experiments on animal scavenging: A systematic literature review on what we have and what we need (2023) · cites this paper as [28]
The Recommendations section rejects a universal model cadaver or mass threshold. Table 5 gives no mass minimum for early-colonizer studies, at least 20 kg for early- and middle-colonizer studies, and at least 40 kg for studies of all colonizers—not a general 30 kg minimum. (LLM, conf=0.88)
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Experimental — accuracy not yet measuredFor taphonomy studies, a distance of at least 30-50 m were found to be sufficient to ensure sample independence.
“For taphonomy studies, a distance of at least 30 -50 m were found to be sufficient to ensure sample independence [28,169].”
From Forensic experiments on animal scavenging: A systematic literature review on what we have and what we need (2023) · cites this paper as [28]
The Experimental design section (page not available in our copy) says there is empirical support for placing cadavers at least 50 m apart to ensure independence in forensic entomology experiments. It does not establish that 30 m is sufficient, or that a 30–50 m threshold was found sufficient for taphonomy studies; it says cadavers in two taphonomy studies placed closer than 50 m apart were not demonstrably independent. (LLM, conf=0.88)
Experimental — accuracy not yet measuredPreviously published systematic reviews of forensic decomposition experiments focus on decomposition, arthropod activity, or general experimental design and analysis in forensic taphonomy, rather than explicitly looking at scavenging and scattering.
“previously published systematic reviews of forensic decomposition experiments focus on decomposition, arthropod activity, or general experimental design and analysis in forensic taphonomy [26 -29], rather than explicitly looking at scavenging and scattering.”
From Forensic experiments on animal scavenging: A systematic literature review on what we have and what we need (2023) · cites this paper as [28]
Results from animal studies need validation on humans and should not be directly transferred to forensic (anthropological) cases.
“results from animal studies need validation on humans and should not be directly transferred to forensic (anthropo logical) cases, as stressed in several publications [27,28,138,142].”
From Forensic experiments on animal scavenging: A systematic literature review on what we have and what we need (2023) · cites this paper as [28]
Non-humans are easier to acquire, even in large numbers and with homogenous properties.
“while non-humans are easier to acquire, even in large numbers and with homogenous properties [28].”
From Forensic experiments on animal scavenging: A systematic literature review on what we have and what we need (2023) · cites this paper as [28]
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Experimental Design and Data Analysis for Biologists
Quinn, G. P., & Keough, M. J. (2002) · doi:10.1017/cbo9780511806384 · Cited by 10,674 · cited 2×
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Indra, L., Lösch, S., Errickson, D., & Finaughty, D. (2023) · Forensic Science International · doi:10.1016/j.forsciint.2023.111862 · Cited by 18
Metadata
- Authors
- Matuszewski, S., Hall, M. J. R., Moreau, G., Schoenly, K. G., Tarone, A. M., & Villet, M. H.
- Affiliations
- Adam Mickiewicz University in Poznań (PL)
- Natural History Museum (GB)
- Université de Moncton (CA)
- California State University, Stanislaus (US)
- Texas A&M University (US)
- Rhodes University (ZA)
- Corresponding author
- Matuszewski, Szymon
- ORCID
- Venue
- International Journal of Legal Medicine
- Published
- 2019-06-17
- Volume
- 134
- Issue
- 2
- Pages
- 793-810
- ISSN
- 0044-3433 (ISSN-L)
- 0937-9827
- 1437-1596
- PMC
- PMC7044136
- OpenAlex
- W2953040380
- Cited by
- 251
- References
- 1
- Citations by year
- 2026: 44 · 2025: 37 · 2024: 41 · 2023: 40 · 2022: 26 · 2021: 36 · 2020: 25 · 2019: 2
- FWCI
- 2.42
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Locations
- International Journal of Legal Medicine (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Natural History Museum, London (submittedVersion, cc-by)
- Funders
- Adam Mickiewicz University in Poznan
- Topics
- Life Sciences › Agricultural and Biological Sciences › Insect Science › Forensic Entomology and Diptera Studies
- Social Sciences › Arts and Humanities › Archeology (arts and humanities) › Forensic Anthropology and Bioarchaeology Studies
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Diptera species taxonomy and behavior
- Keywords
- forensic entomology, taphonomy, pig carcasses, experimental replication, confounding factors
- MeSH terms
- Forensic Entomology, Animals, Cadaver, Humans, Research Design, Swine, Models, Animal, Forensic Sciences, History, 19th Century, History, 20th Century, History, 21st Century
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