Bioaccumulation in Insects
Definition
The uptake and concentration of a toxicant from the substrate (decomposing tissue) into insect tissues during larval feeding. Concentration in larval tissue may be higher or lower than in the substrate, depending on the compound and stage.
- Process
- Toxicant uptake from substrate into insect tissue
- Substrate
- Decomposing tissue
- Variability
- Higher or lower than substrate, compound-dependent
- Field
- Entomotoxicology
Common questions
Why does bioaccumulation matter for interpreting a drug finding in larvae?+
Concentration in the larva does not map directly onto the original substrate concentration, so a toxicologist cannot simply read the substrate's drug level off the insect's tissue level without accounting for the compound's specific accumulation behaviour.
Does bioaccumulation happen the same way across insect life stages?+
No, uptake and retention differ between larval instars and other developmental stages, since feeding behaviour and tissue composition change substantially as the insect develops.
Related terms
- Development Rate Alteration
- A drug- or toxin-induced shift in the time from oviposition to pupation. Stimulant compounds tend to accelerate development; certain heavy metals and...
- Empty Puparium
- The hardened larval skin (puparium) left behind after adult emergence. It retains chemical residues including drug metabolites and can be the only...
- Entomotoxicology
- The analysis of insect tissue for drugs and toxins when decomposition has made conventional biological fluids unavailable. Blow-fly larvae feeding on a...
- Larval Crop Contents
- The partially digested material in the larval foregut, reflecting the most recent substrate the larva fed on. Useful for detecting what the...
- PMI Correction
- Adjustment of the post-mortem interval estimate to account for documented drug or toxin effects on larval development rate. Without correction, a drug-accelerated...