The maggot, the ethologist and the forensic ...
Document type :
Article dans une revue scientifique: Article original
Permalink :
Title :
The maggot, the ethologist and the forensic entomologist: Sociality and thermoregulation in necrophagous larvae
Author(s) :
Aubernon, Cindy [Auteur]
Hedouin, Valery [Auteur]
Unité de Taphonomie Médico-Légale & d’Anatomie (UTMLA) - ULR 7367
Unité de Taphonomie Médico-Légale (UTML) - ULR 7367
CHARABIDZE, Damien [Auteur]
Unité de Taphonomie Médico-Légale (UTML) - EA 7367
Centre d'Histoire Judiciaire (CHJ) - UMR 8025
Hedouin, Valery [Auteur]
Unité de Taphonomie Médico-Légale & d’Anatomie (UTMLA) - ULR 7367
Unité de Taphonomie Médico-Légale (UTML) - ULR 7367
CHARABIDZE, Damien [Auteur]
Unité de Taphonomie Médico-Légale (UTML) - EA 7367
Centre d'Histoire Judiciaire (CHJ) - UMR 8025
Journal title :
Journal of Advanced Research
Abbreviated title :
Journal of Advanced Research
Volume number :
16
Pages :
67-73
Publisher :
Elsevier
Publication date :
2019-03
ISSN :
20901232
English keyword(s) :
Allee effect
Fitness
Maggot mass
Harsh environment
Trade-off
Blowflies
Fitness
Maggot mass
Harsh environment
Trade-off
Blowflies
HAL domain(s) :
Sciences du Vivant [q-bio]
English abstract : [en]
Necrophagous insects are mostly known through forensic entomology. Indeed, experimental data investigating the effect of temperature on larval development underlies post-mortem interval estimations. However, such developmental ...
Show more >Necrophagous insects are mostly known through forensic entomology. Indeed, experimental data investigating the effect of temperature on larval development underlies post-mortem interval estimations. However, such developmental studies rarely considered the behavior of maggots. In contrast, previous results supposed that calliphoridae larvae use behavioral strategies to optimize their development on carcasses. To test this idea, we analyzed the trade-off between thermal regulation (individual thermal preferences) and social behavior (aggregation) in Lucilia sericata larvae. The first set of experiments analyzed the behavior of third instars in response to thermal changes in their environment. The results demonstrated a clear thermoregulation behavior, supporting the assumption that larvae continuously move to reach a suitable internal temperature. The second set of experiments focused on the trade-off between thermal optimization and aggregation. The results showed a constant search for congeners and an attractiveness of aggregates, sometimes to the detriment of thermal optimization. Together, these results demonstrate a balance between behavioral thermoregulation and social strategies, two significant mechanisms for developmental optimization in necrophagous larvae. In conclusion, these findings highlights unexpected (social) strategies to cope with ephemeral resource and high selection pressure. They also raise important questions for forensic entomology.Show less >
Show more >Necrophagous insects are mostly known through forensic entomology. Indeed, experimental data investigating the effect of temperature on larval development underlies post-mortem interval estimations. However, such developmental studies rarely considered the behavior of maggots. In contrast, previous results supposed that calliphoridae larvae use behavioral strategies to optimize their development on carcasses. To test this idea, we analyzed the trade-off between thermal regulation (individual thermal preferences) and social behavior (aggregation) in Lucilia sericata larvae. The first set of experiments analyzed the behavior of third instars in response to thermal changes in their environment. The results demonstrated a clear thermoregulation behavior, supporting the assumption that larvae continuously move to reach a suitable internal temperature. The second set of experiments focused on the trade-off between thermal optimization and aggregation. The results showed a constant search for congeners and an attractiveness of aggregates, sometimes to the detriment of thermal optimization. Together, these results demonstrate a balance between behavioral thermoregulation and social strategies, two significant mechanisms for developmental optimization in necrophagous larvae. In conclusion, these findings highlights unexpected (social) strategies to cope with ephemeral resource and high selection pressure. They also raise important questions for forensic entomology.Show less >
Language :
Anglais
Audience :
Non spécifiée
Popular science :
Non
Administrative institution(s) :
CHU Lille
CNRS
Université de Lille
CNRS
Université de Lille
Collections :
Submission date :
2021-12-08T09:53:43Z
2022-02-14T07:31:07Z
2022-02-14T07:31:07Z