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Diversity and succession pattern of forensically important dipteran species associated with organophosphate pesticides-intoxicated rat carcasses in Sarawak, Malaysia

This research aimed to study the decomposition process of organophosphate-intoxicated rat carcasses and the succession pattern of associated insects at a secondary forest in Kuching, Sarawak, Malaysia. The animal model, Rattus norvegicus, weighing around 180-200g were assigned in T1 and T2 groups an...

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Main Authors: Nor Aliza Abdul Rahim,, Marlini Othman,, Madinah Adrus,, Zainab Ngaini,
Format: Article
Language:English
Published: Penerbit Universiti Kebangsaan Malaysia 2024
Online Access:http://journalarticle.ukm.my/23814/1/serangga_9.pdf
http://journalarticle.ukm.my/23814/
https://ejournals.ukm.my/serangga/issue/view/1633/showToc
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spelling my-ukm.journal.238142024-07-10T06:44:24Z http://journalarticle.ukm.my/23814/ Diversity and succession pattern of forensically important dipteran species associated with organophosphate pesticides-intoxicated rat carcasses in Sarawak, Malaysia Nor Aliza Abdul Rahim, Marlini Othman, Madinah Adrus, Zainab Ngaini, This research aimed to study the decomposition process of organophosphate-intoxicated rat carcasses and the succession pattern of associated insects at a secondary forest in Kuching, Sarawak, Malaysia. The animal model, Rattus norvegicus, weighing around 180-200g were assigned in T1 and T2 groups and were given LD50 dosage of organophosphate, glyphosate, and chlorpyrifos via oral administration, respectively. Sixty minutes after oral administration, the rats were euthanized and brought to the study site. The rat carcasses were monitored daily and the carrion insects were collected throughout the decomposition process. From five trials of experiments, a total of 1454 individual flies were collected, belonging to three families and 10 species. The highest number of fly species collected was Chrysomya rufifacies (75.03%) being the predominant species infesting the carcasses. The dipteran diversity and succession pattern were similar for all groups of carcasses, even though insect abundance were the least in T2 carcasses. Five stages of decomposition were observed in all rat carcasses, with longer decomposition duration in intoxicated carcasses (T1: 7.85±0.51 and T2: 15.8±2.82 days) compared to the control group (7.25±0.59 days). In conclusion, the organophosphate has altered the decomposition duration and the number of flies infesting the carcasses especially on chlorpyrifos-intoxicated carcasses. This work provides relevant information regarding the insect’s succession pattern and the changes in the decomposition period which may assist in the determination of post-mortem interval time in future investigation processes when organophosphate poisoning is suspected. Penerbit Universiti Kebangsaan Malaysia 2024 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/23814/1/serangga_9.pdf Nor Aliza Abdul Rahim, and Marlini Othman, and Madinah Adrus, and Zainab Ngaini, (2024) Diversity and succession pattern of forensically important dipteran species associated with organophosphate pesticides-intoxicated rat carcasses in Sarawak, Malaysia. Serangga, 29 (1). pp. 119-137. ISSN 1394-5130 https://ejournals.ukm.my/serangga/issue/view/1633/showToc
institution Universiti Kebangsaan Malaysia
building Tun Sri Lanang Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Kebangsaan Malaysia
content_source UKM Journal Article Repository
url_provider http://journalarticle.ukm.my/
language English
description This research aimed to study the decomposition process of organophosphate-intoxicated rat carcasses and the succession pattern of associated insects at a secondary forest in Kuching, Sarawak, Malaysia. The animal model, Rattus norvegicus, weighing around 180-200g were assigned in T1 and T2 groups and were given LD50 dosage of organophosphate, glyphosate, and chlorpyrifos via oral administration, respectively. Sixty minutes after oral administration, the rats were euthanized and brought to the study site. The rat carcasses were monitored daily and the carrion insects were collected throughout the decomposition process. From five trials of experiments, a total of 1454 individual flies were collected, belonging to three families and 10 species. The highest number of fly species collected was Chrysomya rufifacies (75.03%) being the predominant species infesting the carcasses. The dipteran diversity and succession pattern were similar for all groups of carcasses, even though insect abundance were the least in T2 carcasses. Five stages of decomposition were observed in all rat carcasses, with longer decomposition duration in intoxicated carcasses (T1: 7.85±0.51 and T2: 15.8±2.82 days) compared to the control group (7.25±0.59 days). In conclusion, the organophosphate has altered the decomposition duration and the number of flies infesting the carcasses especially on chlorpyrifos-intoxicated carcasses. This work provides relevant information regarding the insect’s succession pattern and the changes in the decomposition period which may assist in the determination of post-mortem interval time in future investigation processes when organophosphate poisoning is suspected.
format Article
author Nor Aliza Abdul Rahim,
Marlini Othman,
Madinah Adrus,
Zainab Ngaini,
spellingShingle Nor Aliza Abdul Rahim,
Marlini Othman,
Madinah Adrus,
Zainab Ngaini,
Diversity and succession pattern of forensically important dipteran species associated with organophosphate pesticides-intoxicated rat carcasses in Sarawak, Malaysia
author_facet Nor Aliza Abdul Rahim,
Marlini Othman,
Madinah Adrus,
Zainab Ngaini,
author_sort Nor Aliza Abdul Rahim,
title Diversity and succession pattern of forensically important dipteran species associated with organophosphate pesticides-intoxicated rat carcasses in Sarawak, Malaysia
title_short Diversity and succession pattern of forensically important dipteran species associated with organophosphate pesticides-intoxicated rat carcasses in Sarawak, Malaysia
title_full Diversity and succession pattern of forensically important dipteran species associated with organophosphate pesticides-intoxicated rat carcasses in Sarawak, Malaysia
title_fullStr Diversity and succession pattern of forensically important dipteran species associated with organophosphate pesticides-intoxicated rat carcasses in Sarawak, Malaysia
title_full_unstemmed Diversity and succession pattern of forensically important dipteran species associated with organophosphate pesticides-intoxicated rat carcasses in Sarawak, Malaysia
title_sort diversity and succession pattern of forensically important dipteran species associated with organophosphate pesticides-intoxicated rat carcasses in sarawak, malaysia
publisher Penerbit Universiti Kebangsaan Malaysia
publishDate 2024
url http://journalarticle.ukm.my/23814/1/serangga_9.pdf
http://journalarticle.ukm.my/23814/
https://ejournals.ukm.my/serangga/issue/view/1633/showToc
_version_ 1805885790649057280
score 13.211869

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