Banca de DEFESA: MAIARA SANTOS VALENTIN

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : MAIARA SANTOS VALENTIN
DATA : 12/03/2026
HORA: 14:00
LOCAL: Sala de Videoconferência, Unidade 1
TÍTULO:

Beetles (Coleóptera; Insecta) and flies (Díptera; Insecta) of forensic interest in the Southern Amazon.

PALAVRAS-CHAVES:

Forensic entomology. Entomological succession. Postmortem interval. Necrobia rufipes. Dermestes maculatus. Cadaveric decomposition.

PÁGINAS: 58
GRANDE ÁREA: Ciências Biológicas
ÁREA: Zoologia
SUBÁREA: Zoologia Aplicada
ESPECIALIDADE: Utilização dos Animais
RESUMO:

Forensic entomology uses necrophagous insects as biological evidence for postmortem interval (PMI) estimation in criminal investigations. In the Southern Amazon, a transition region between Amazon rainforest and Cerrado, studies on carrion fauna are scarce, limiting the application of this forensic tool. This study aimed to conduct a systematic survey of necrophagous entomofauna associated with swine carcass decomposition in Alta Floresta, Mato Grosso, evaluating the influence of shading on faunal composition and temporal succession patterns. Four swine carcasses (Sus scrofa domesticus, 15 kg) were distributed in two treatments: direct sun exposure (n=2) and shaded environment (n=2), during the dry season (August-September/2025). Adult insects were collected daily for 24 consecutive days using sweep nets (Díptera ) and forceps (Coleóptera). A total of 403 specimens were collected, distributed across 2 orders, 5 families, and 7 species/morphospecies. Coleóptera was the dominant order (61.79%; n=249), represented by Necrobia rufipes (42.18%) and Dermestes maculatus (19.60%), followed by Díptera  (38.21%; n=154), with families Calliphoridae (14.89%), Sarcophagidae (17.37%), and Muscidae (5.96%). Predictable temporal succession was observed in four phases: (1) Díptera n dominance (days 2-5, 98.06%), (2) transition to Coleópterans (days 6-10, 82.11%), (3) Coleópteran maintenance (days 11-16, 78.32%), and (4) terminal dry phase (days 17-24, 100% Coleópterans). Shading significantly influenced faunal composition (χ²=18.47; p<0.001): exposed areas showed strong Coleópteran dominance (71.43%) while shaded areas displayed balanced proportions (50.54% Coleópterans; 49.46% Díptera ns). Complete decomposition occurred in 24 days, faster than similar studies in other tropical regions, attributed to extreme dry season climatic conditions (temperatures 20-34°C; precipitation <10 mm/month). Results establish specific temporal windows for PMI estimation in the region: exclusive Díptera n presence indicates 1-5 days; coexistence of Díptera ns and Coleópterans indicates 4-10 days; Coleópteran dominance indicates 11-16 days; exclusive Coleópteran presence indicates >16 days. This study fills an important gap in the knowledge of carrion entomofauna in the Southern Amazon, providing essential quantitative data for regionalized forensic application, and demonstrates that microclimatic factors, especially shading, must be considered in forensic PMI estimates.

MEMBROS DA BANCA:
Presidente - 131948001 - MENDELSON GUERREIRO DE LIMA
Interna - 253817001 - JULIANA GARLET
Externo à Instituição - LEANDRO DÊNIS BATTIROLA - UFMT