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Insects 2018, 9(3), 106; https://doi.org/10.3390/insects9030106

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

1
Department of Parasitology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
2
Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand
3
Nakhonsawan Campus, Mahidol University, Nakhonsawan 60130, Thailand
4
National Institute of Education, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
5
Department of Entomology, Texas A&M University, 2475 TAMU, College Station, TX 77843, USA
6
Department of Medical Entomology, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
*
Author to whom correspondence should be addressed.
Received: 11 July 2018 / Revised: 8 August 2018 / Accepted: 17 August 2018 / Published: 21 August 2018
(This article belongs to the Special Issue Insect Population Dynamics: Theory & Practice)
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Abstract

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. View Full-Text
Keywords: spatial distribution; predictive distribution; GIS; forensic entomology spatial distribution; predictive distribution; GIS; forensic entomology
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Klong-klaew, T.; Ngoen-klan, R.; Moophayak, K.; Sukontason, K.; Irvine, K.N.; Tomberlin, J.K.; Somboon, P.; Chareonviriyaphap, T.; Kurahashi, H.; Sukontason, K.L. Predicting Geographic Distribution of Forensically Significant Blow Flies of Subfamily Chrysomyinae (Diptera: Calliphoridae) in Northern Thailand. Insects 2018, 9, 106.

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