Table 2.
Comparison of the different categories we assessed for each trap type (i.e., sample processing time, cost, sustainability, sturdiness, HWA eDNA-analysis compatibility) in addition to HWA capture success for the initial trap design testing in 2020
| Trap type | Sample processing time | Trap cost | Redeployment cost | Sustainability rating | Sturdy | eDNA compatibility |
|---|---|---|---|---|---|---|
| Motorized | 5–10 min | $15.00 | $1.00a | Third | Yes | Easy |
| Passive | 5–10 min | $20.00 | $0.20b | First | No | Easy |
| Funnel | ≥30 min | $100.00 | $0.60c | Second | Yes | Moderate |
| Sticky | ≥30 min | $10.00 | $7.00d | Fourth | Yes | Moderate |
We rated each trap type on sustainability with ‘first’ being considered the most sustainable. Redeployment costs were calculated from the use of brand-new materials needed to redeploy a trap for each collection period, and these costs were averaged for a single trap from the total cost of redeployment over the four weeks of the study. We also acknowledge cost of materials can vary by country and region.
All trap costs include materials, shipping, and hardware needed for deployment.
a Includes cost of additional batteries, if needed, and new petroleum jelly for slides.
b Includes the cost of new petroleum jelly for slides.
c Includes the cost to refill the collection cup with 45 ml of propylene glycol.
d Includes the cost of a new sticky trap.