Necrophagous species of Diptera and Coleoptera in northeastern Brazil: state of the art and challenges for the Forensic Entomologist

Vasconcelos, Simão Dias; Araujo, Manuela Correia Souza

doi:10.1590/s0085-56262012005000014

Cited by 54 publications

(34 citation statements)

References 27 publications

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“…Although continuous, the process is divided into stages to facilitate research studies (Goff 1993;borneMissza 1956). Each stage of decomposition provides a favorable microenvironment for certain insect species, causing certain groups to colonize the carcass; this establishes a predictable chronological sequence (Payne 1965;borneMissza 1956;VasConCelos & araujo 2012).…”

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confidence: 99%

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Insect Fauna Associated with Exposed Pig Carcasses in Southern Brazil

Ries

Blochtein

2015

EntomoBrasilis

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Abstract. The knowledge of insect patterns visiting decomposing carcasses and the analysis of parameters related to their presence help determine the post-mortem interval (PMI). This information depends on regional studies because the diversity of insects and the environmental conditions interfere in this process. The aim of the study was to analyze the insect fauna that colonizes carcasses of pigs exposed in different stages of decomposition in the study area. The experiment was conducted in southern Brazil using three domestic pigs (Sus scrofa Linnaeus) that were killed on site. Adult insects associated with carcasses were sampled daily using an insect net, manual collection and pitfall traps. Statistical tests were performed to evaluate the diversity of insects. During the process of decomposition (14 days), Scarabaeidae (25%) and Calliphoridae (23%) species were the most abundant of all of the samples. The diversity of insects is distinguishable when all parameters are analyzed. The Black Putrefaction (IV) stage exhibited the highest diversity according to the applied methods. The succession pattern was established from the species dominance index: Fresh stage -Lucilia eximia Wiedemann (Diptera, Calliphoridae); Chromatic and Bloat -Chrysomya albiceps (Wiedemann) (Diptera, Calliphoridae); Black Putrefaction and Skeletonization -Aphodiinae sp. 1 (Coleoptera, Scarabaeidae).Keywords: Colonization; forensic entomology; postmortem interval; scavenger insects; Sus scrofa. Entomofauna Associada a Carcaças de Suínos Expostas no Sul do BrasilResumo. O conhecimento dos padrões de insetos que visitam carcaças em decomposição e a análise dos parâmetros relacionados a sua presença auxilia na determinação do intervalo post-mortem (IPM). Estas informações dependem de estudos regionais, pois a diversidade de insetos e as condições ambientais interferem neste contexto. O objetivo do estudo foi analisar a entomofauna que coloniza carcaças expostas em diferentes estágios de decomposição na área de estudo. O experimento foi conduzido no sul do Brasil utilizando três porcos domésticos (Sus scrofa Linnaeus), abatidos no local. Insetos adultos associados às carcaças foram amostrados diariamente com rede entomológica, coleta manual e armadilhas pitfall. Foram realizados testes estatísticos para avaliar a diversidade de insetos. Durante o processo de decomposição (14 dias), espécimes de Scarabaeidae (25%) e Calliphoridae (23%) foram os mais abundantes, considerando-se a totalidade das amostras. A diversidade de insetos é distinguível quando são analisados todos os parâmetros. A fase de Putrefação negra (IV) exibiu a maior diversidade de acordo com os métodos aplicados. O padrão de sucessão foi estabelecido a partir do índice de dominância das espécies: fase Fresca -Lucilia eximia Wiedemann (Diptera, Calliphoridae), fase Cromática e de Inchamento -Chrysomya albiceps (Wiedemann) (Diptera, Calliphoridae), e fase de Putrefação Negra e de Esqueletização -Aphodiinae sp. 1 (Coleoptera, Scarabaeidae). Palavras-chave:Colonização; entomologia ...

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confidence: 99%

“…Many cases remain unsolved due to difficulties in the criminal investigation procedures. Complementing the advances in biological research, tools that utilize ecological and entomological data are being routinely implemented by forensic scientists in Brazil (VasConCelos & araujo 2012).…”

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confidence: 99%

Insect Fauna Associated with Exposed Pig Carcasses in Southern Brazil

Ries

Blochtein

2015

EntomoBrasilis

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“…andrade et al 2005;Oliveira & vasCOnCelOs 2010;vasCOnCelOs & araujO 2012). Para a Bahia, existe apenas um trabalho, com um relato da fauna cadavérica na primeira década do século XX (Freire 1914).…”

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Levantamento Taxonômico e Sazonalidade de Calliphoridae, Muscidae e Fanniidae (Insecta: Diptera) em Feira de Santana, Bahia, Brasil

2014

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Resumo. Os dípteros necrófagos utilizam matéria orgânica em decomposição como fonte proteica em ao menos uma fase de sua vida. Deste modo o conhecimento taxonômico dessa fauna se torna importante para estudos forense, sanitário e médico. Os dípteros das famílias Calliphoridae, Muscidae e Fanniidae possuem espécies necrófagas associadas ao ambiente humano, estando entre os insetos de maior destaque nesse aspecto e até então nunca foram estudados na cidade de Feira de Santana, Bahia. O objetivo deste estudo foi realizar um levantamento da fauna de dípteros necrófagos das famílias Calliphoridae, Muscidae e Fanniidae de Feira de Santana, Bahia. Para isso, foram realizadas coletas mensais ao longo de um ano em três áreas da cidade com um total de cinco armadilhas iscadas (com 24 horas de exposição) por área, resultando em um subconjunto de 60 armadilhas/ área e um total de 180 amostras. Foram coletados 4.818 dípteros, pertencentes a 20 espécies das três famílias estudadas: Calliphoridae (seis espécies), Fanniidae (três espécies) e Muscidae (11 espécies). A maior abundância das famílias ocorreu no outono e a menor no verão. Observou-se que treze das vinte espécies coletadas, possuem interesse forense e sanitário descritos na literatura. Palavras-chave:Abundância; dípteros; moscas; riqueza de espécies. Taxonomic Survey and Seasonality of Calliphoridae, Muscidae and Fanniidae (Insecta: Diptera) in Feira de Santana, Bahia, BrazilAbstract. Taxonomic studies in necrphagous Diptera is relevant because of its importance for forensic, health and medical purposes, since they feed in decaying organic matter as protein source, at least in one stage of their lives. Synantropic Diptera, such us some species of Calliphoridae, Muscidae and Fannidae had not been studied in Feira de Santana, BA. The aim of this study was to do an inventory of necrophagous Diptera belonging to the families cited above. Five baited traps (24 hours of exposure) were placed in three sites in the town, once a month, resulting in a subset of 60 traps per site and a total of 180 samples. A total of 4.818 specimens were collected, belonging to 20 species: Calliphoridae (six species), Fannidae (three species) and Muscidae (11 species). The abundance of synantropic Diptera showed seasonality being the fall the season with higher abundance while in the summer the abundance was significant lower. Thirteen out of the twenty species collected were cited in the literature as being of forensic importance.

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“…Ironically, Brazilian cities suffering from the highest rates of violence have been neglected in field inventories? Of forensically important species [11,12]. Partly due to convoluted mechanisms of Brazilian legal system and lack of investment in intelligence procedures for the police modus operandi [10].…”

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confidence: 99%

Genetic Identification of Necrophagous Insect Species (Diptera) of Forensic Importance Sampled from Swine Carcasses in Mato Grosso, Midwestern Brazil

Dantas¹,

Leite²

2016

J Forensic Res

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Forensic entomology is the science that uses insects found on bodies to set the Post Mortem Interval (PMI) among other investigations. The present work used DNA barcode based on the use of a standardized fragment of Cytochrome C Oxidase subunit I (COI). We undertook analysis of the taxa associated with carcasses, representing 15 dipterans species. Carcasses of pigs during the decomposition process were used, using a cutoff value of 3% for intra-and interspecific differentiation proves efficient for the dipteran of forensic interest. Species identification is more accurate in well studied and reviewed groups. It was observed that specific taxonomic groups were well separated. In the larger group a molecular study, including other mitochondrial genes and nuclear genes is necessary. The greater differentiation in Lucilia eximia probably requires review studies of the group.

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Necrophagous species of Diptera and Coleoptera in northeastern Brazil: state of the art and challenges for the Forensic Entomologist

Cited by 54 publications

References 27 publications

Insect Fauna Associated with Exposed Pig Carcasses in Southern Brazil

Insect Fauna Associated with Exposed Pig Carcasses in Southern Brazil

Levantamento Taxonômico e Sazonalidade de Calliphoridae, Muscidae e Fanniidae (Insecta: Diptera) em Feira de Santana, Bahia, Brasil

Genetic Identification of Necrophagous Insect Species (Diptera) of Forensic Importance Sampled from Swine Carcasses in Mato Grosso, Midwestern Brazil

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