Comparative fly species composition on indoor and outdoor forensic cases in Malaysia

Abdullah, Syamsa Rizal; Omar, Baharudin; Ahmad, Firdaus; Hidayatulfathi, O; Shahrom, Abd Wahid

doi:10.1016/j.jflm.2016.12.002

Cited by 28 publications

(13 citation statements)

References 33 publications

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“…On the contrary, the study in Malaysia reported Cey. nigripes on the remains found in a house/apartment [ 20 ]. Therefore, the variation of fly infestations in each locality could be due to the availability of food sources, food preferences, ecological features of each locality, and the disturbances of humans.…”

Section: Discussionmentioning

confidence: 99%

“…Four species of blow fly in the subfamily Chrysomyinae were chosen because they are among the most prominent groups of insects associated with corpses and carrion, and are therefore important forensic indicators. Furthermore, they have been reported from human corpses in many countries [ 17 , 18 , 19 , 20 ]. To utilize these flies as evidence in forensic investigations, one needs to know where they occur.…”

Section: Introductionmentioning

confidence: 99%

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Predicting Geographic Distribution of Forensically Significant Blow Flies of Subfamily Chrysomyinae (Diptera: Calliphoridae) in Northern Thailand

Klong-klaew

Ngoen-Klan

Moophayak

et al. 2018

Insects

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Blow flies (Diptera: Calliphoridae) are carrion-breeding flies that are commonly used as evidence in forensic investigation. An adequate knowledge of ecological and geographical data of blow fly has a direct application in forensic science, as far as estimating time of colonization or corpse relocation. The aim of this study was to evaluate the occurrence of four species of Chrysomyinae (Chrysomya pinguis, Chrysomya chani, Chrysomya villeneuvi, and Ceylonomyia nigripes) across six land use types in central Chiang Mai, northern Thailand. Eighteen study sites were selected for sampling across three districts of Chiang Mai province (Mueang Chiang Mai, Mae Rim, and Hang Dong). Adult flies were collected every two weeks using a funnel trap baited with 1-day tainted beef offal. The predicted geographic distributions of forensically important blow fly species were modeled using the computer program ArcGIS, based on selected climatic variables (temperature, relative humidity, and light intensity) recorded at study sites. During the study period, 1298 adult flies were collected, with peak fly occurrence during summer (April–May). Seasonal fluctuation patterns varied depending on fly species. Climatic factors displayed diverse impact on associated fly populations. Identified species were restricted mainly to mixed deciduous forests (MDF) especially in the mountainous area. None of these flies were trapped in an urban area.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Predicting Geographic Distribution of Forensically Significant Blow Flies of Subfamily Chrysomyinae (Diptera: Calliphoridae) in Northern Thailand

Klong-klaew

Ngoen-Klan

Moophayak

et al. 2018

Insects

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“…Currently, most published information is based on restricted datasets; future work should focus on obtaining large amounts of data at the local scale. For example, a posteriori analysis of forensic entomology case databases could provide substantial information on the biology of necrophagous species (e.g., species found on indoor vs. outdoor corpses, seasonal prevalence of specific species) ( Dekeirsschieter et al, 2013 ; Disney et al, 2014 ; Charabidze et al, 2014 , 2016 ; Syamsa et al, 2017 ). Back-testing field experiments should always be performed to verify the local applicability of interpretations.…”

Section: Spatial Separationmentioning

confidence: 99%

Use of necrophagous insects as evidence of cadaver relocation: myth or reality?

Charabidzé

Gosselin

Hédouin

2017

PeerJ

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The use of insects as indicators of post-mortem displacement is discussed in many texts, courses and TV shows, and several studies addressing this issue have been published. Although the concept is widely cited, it is poorly understood, and only a few forensic cases have successfully applied such a method. The use of necrophagous insects as evidence of cadaver relocation actually involves a wide range of biological aspects. Distribution, microhabitat, phenology, behavioral ecology, and molecular analysis are among the research areas associated with this topic. This article provides the first review of the current knowledge and addresses the potential and limitations of different methods to evaluate their applicability. This work reveals numerous weaknesses and erroneous beliefs as well as many possibilities and research opportunities.

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“…The larvae feed on human corpses, thus they can be beneficial in forensic investigations for estimating the minimum time since death (PMI min ) [ 6 ]. Chrysomya megacephala is considered to be the predominant species associated with human corpses in a forensic context in Thailand and Malaysia [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Bionomics of the oriental latrine fly Chrysomya megacephala (Fabricius) (Diptera: Calliphoridae): temporal fluctuation and reproductive potential

et al. 2018

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BackgroundChrysomya megacephala is a blow fly species of medical and forensic importance worldwide. Understanding its bionomics is essential for both designing effective fly control programs and its use in forensic investigations.MethodsThe daily flight activity, seasonal abundance related to abiotic factors (temperature, relative humidity and rainfall) and reproductive potential of this species was investigated. Adult flies were sampled twice a month for one year from July 2013 to June 2014 in three different ecotypes (forest area, longan orchard and palm plantation) of Chiang Mai Province, northern Thailand, using semi-automatic funnel traps. One-day tainted beef offal was used as bait.ResultsA total of 88,273 flies were sampled, of which 82,800 flies (93.8%) were caught during the day (from 06:00 to 18:00 h); while 5473 flies (6.2%) were caught at night (from 18:00 to 06:00 h). Concurrently, the abundance of C. megacephala was higher in the forest area (n = 31,873; 36.1%) and palm plantation (n = 31,347; 35.5%), compared to the longan orchard (n = 25,053; 28.4%). The number of females was significantly higher than that of males, exhibiting a female to male sex ratio of 2.36:1. Seasonal fluctuation revealed the highest abundance of C. megacephala in summer, but low numbers in the rainy season and winter. Fly density was significantly positively correlated with temperature, but negatively correlated with relative humidity. No correlation between numbers of C. megacephala with rainfall was found. Activity occurred throughout the daytime with high numbers from 06:00 to 18:00 h in summer and 12:00 to 18:00 h in the rainy season and winter. As for the nocturnal flight activity, a small number of flies were collected in summer and the rainy season, while none were collected in the winter. Dissection of the females indicated that fecundity was highest during the rainy season, followed by winter and summer.ConclusionsSince the assessment of daily, seasonal activity and the reproductive potential of C. megacephala remains a crucial point to be elucidated, this extensive study offers insights into bionomics, which may be considered for integrated fly control strategies and forensic entomology issues.

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Comparative fly species composition on indoor and outdoor forensic cases in Malaysia

Cited by 28 publications

References 33 publications

Predicting Geographic Distribution of Forensically Significant Blow Flies of Subfamily Chrysomyinae (Diptera: Calliphoridae) in Northern Thailand

Predicting Geographic Distribution of Forensically Significant Blow Flies of Subfamily Chrysomyinae (Diptera: Calliphoridae) in Northern Thailand

Use of necrophagous insects as evidence of cadaver relocation: myth or reality?

Bionomics of the oriental latrine fly Chrysomya megacephala (Fabricius) (Diptera: Calliphoridae): temporal fluctuation and reproductive potential

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