Size at emergence improves accuracy of age estimates in forensically-useful beetle Creophilus maxillosus L. (Staphylinidae)

Abstract Insects colonizing human or animal cadavers may be used to estimate post-mortem interval (PMI) usually by aging larvae or pupae sampled on a crime scene. The accuracy of insect age estimates in a forensic context is reduced by large intraspecific variation in insect development time. Here w...

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Autores principales:	Szymon Matuszewski, Katarzyna Frątczak-Łagiewska
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a95f1263c69e4880bd35fc884df86507
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spelling	oai:doaj.org-article:a95f1263c69e4880bd35fc884df865072021-12-02T15:08:36ZSize at emergence improves accuracy of age estimates in forensically-useful beetle Creophilus maxillosus L. (Staphylinidae)10.1038/s41598-018-20796-12045-2322https://doaj.org/article/a95f1263c69e4880bd35fc884df865072018-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-20796-1https://doaj.org/toc/2045-2322Abstract Insects colonizing human or animal cadavers may be used to estimate post-mortem interval (PMI) usually by aging larvae or pupae sampled on a crime scene. The accuracy of insect age estimates in a forensic context is reduced by large intraspecific variation in insect development time. Here we test the concept that insect size at emergence may be used to predict insect physiological age and accordingly to improve the accuracy of age estimates in forensic entomology. Using results of laboratory study on development of forensically-useful beetle Creophilus maxillosus (Linnaeus, 1758) (Staphylinidae) we demonstrate that its physiological age at emergence [i.e. thermal summation value (K) needed for emergence] fall with an increase of beetle size. In the validation study it was found that K estimated based on the adult insect size was significantly closer to the true K as compared to K from the general thermal summation model. Using beetle length at emergence as a predictor variable and male or female specific model regressing K against beetle length gave the most accurate predictions of age. These results demonstrate that size of C. maxillosus at emergence improves accuracy of age estimates in a forensic context.Szymon MatuszewskiKatarzyna Frątczak-ŁagiewskaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Szymon Matuszewski Katarzyna Frątczak-Łagiewska Size at emergence improves accuracy of age estimates in forensically-useful beetle Creophilus maxillosus L. (Staphylinidae)
description	Abstract Insects colonizing human or animal cadavers may be used to estimate post-mortem interval (PMI) usually by aging larvae or pupae sampled on a crime scene. The accuracy of insect age estimates in a forensic context is reduced by large intraspecific variation in insect development time. Here we test the concept that insect size at emergence may be used to predict insect physiological age and accordingly to improve the accuracy of age estimates in forensic entomology. Using results of laboratory study on development of forensically-useful beetle Creophilus maxillosus (Linnaeus, 1758) (Staphylinidae) we demonstrate that its physiological age at emergence [i.e. thermal summation value (K) needed for emergence] fall with an increase of beetle size. In the validation study it was found that K estimated based on the adult insect size was significantly closer to the true K as compared to K from the general thermal summation model. Using beetle length at emergence as a predictor variable and male or female specific model regressing K against beetle length gave the most accurate predictions of age. These results demonstrate that size of C. maxillosus at emergence improves accuracy of age estimates in a forensic context.
format	article
author	Szymon Matuszewski Katarzyna Frątczak-Łagiewska
author_facet	Szymon Matuszewski Katarzyna Frątczak-Łagiewska
author_sort	Szymon Matuszewski
title	Size at emergence improves accuracy of age estimates in forensically-useful beetle Creophilus maxillosus L. (Staphylinidae)
title_short	Size at emergence improves accuracy of age estimates in forensically-useful beetle Creophilus maxillosus L. (Staphylinidae)
title_full	Size at emergence improves accuracy of age estimates in forensically-useful beetle Creophilus maxillosus L. (Staphylinidae)
title_fullStr	Size at emergence improves accuracy of age estimates in forensically-useful beetle Creophilus maxillosus L. (Staphylinidae)
title_full_unstemmed	Size at emergence improves accuracy of age estimates in forensically-useful beetle Creophilus maxillosus L. (Staphylinidae)
title_sort	size at emergence improves accuracy of age estimates in forensically-useful beetle creophilus maxillosus l. (staphylinidae)
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/a95f1263c69e4880bd35fc884df86507
work_keys_str_mv	AT szymonmatuszewski sizeatemergenceimprovesaccuracyofageestimatesinforensicallyusefulbeetlecreophilusmaxillosuslstaphylinidae AT katarzynafratczakłagiewska sizeatemergenceimprovesaccuracyofageestimatesinforensicallyusefulbeetlecreophilusmaxillosuslstaphylinidae
_version_	1718388080370515968

Size at emergence improves accuracy of age estimates in forensically-useful beetle Creophilus maxillosus L. (Staphylinidae)

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