Ants (Hymenoptera: Formicidae) Associated with Pig Carcasses in an Urban Area

Joudellys Andrade-Silva, Eunice Kethure Coelho Pereira, Orleans Silva, Jacques Hubert Charles Delabie, José Manuel M. Rebelo

Abstract


The study of cadaver fauna is the most important aspect of forensic entomology, and it is based on successional patterns of insects that feed on decaying carcasses. Many ant species have scavenger lifestyles, and thus have the potential for use in forensic entomology studies. There are no previous studies of ant fauna as forensic entomology tools in state of Maranhão. Here we characterize ants found on domestic swine carcasses at different stages of decomposition, with the goal of initiating a forensic entomology database in the state. We collected ants between November and December 2012 on two pig carcasses. A third carcass with no ant collection was used as a control to assess the influence of ant removal on decomposition rate. We captured 1,692 Formicidae in total, distributed among 10 genera and including 17 species. The most abundant species was Solenopsis saevissima, with 55.6% of relative abundance. Solenopsis was present at various stages of decomposition either feeding on carcass tissues or exudates, or preying on larval, pupal and newly emerged adult flies. Ants associated with this environment had high species richness and abundance in all stages of decomposition. We suggest that these insects influence the decomposition process either as facilitators (i.e., by laceration and fragmentation of tissue) or as hindering agents (i.e., due to predation upon other scavenging organisms).


Keywords


Behavior; ant; pig carcass; forensic entomology

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References


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DOI: http://dx.doi.org/10.13102/sociobiology.v62i4.795

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