Standard eDNA tells you a species' genetic material was somewhere in the system at some point. That's powerful for early-warning screening, but it leaves critical questions unanswered:

- Is the detection a live population or just residual/transported DNA? eDNA can persist for days to weeks and travel long distances, producing detections that don't reflect a current, local, living presence.

- Is a harmful organism actually doing harm? Detecting a cyanobacteria species isn't the same as knowing whether it's actively expressing toxin genes. eRNA reveals functional activity, not just presence.

- How is the ecosystem responding — to stress, to a restoration effort, to a treatment? RNA expression shifts in near-real-time, giving a live readout of biological response that DNA simply can't provide.

For management decisions where being right now and right here matters — invasive species response, bloom risk, restoration verification, treatment efficacy — eDNA alone leaves a gap. eRNA closes it.

The Osprey Platform, from our partners at EQO, ships to your site as two coordinated cases:

- Osprey Control Case — stays on-site for the duration of your monitoring program. Contains the pump system, battery and charger, control electronics, tubing, sample mounts, flow meter, pre-filters, and labeled instructions. This is the engine that moves high water volume through filtration.

- Osprey Sample Case — travels back and forth between your site and the lab. Contains sample cartridges, shipping mounts, and proprietary pre-measured preservation buffer that locks in the transcriptomic snapshot the moment you sample.

Field workflow: Cases arrive on-site → run the pump per provided guidelines → roughly 15 minutes of sampling per run → "set" the genetic signal with buffering solution → ship the Sample Case back, postage included.

Sampling cadence: One-time test? Return both cases. Multi-month or multi-year program? Keep the Control Case on-site and cycle only the Sample Case to the lab.

Lab analysis then applies metabarcoding, NGS, microarray, and/or qPCR to the preserved sample, delivering eRNA (and paired eDNA, if desired) results.

Why eRNA Requires Different Sampling (and the Osprey)

This is the part that trips up most monitoring programs, so it's worth being explicit about how different eRNA collection is from the eDNA workflow most people know. eDNA is forgiving: the molecule stays stable for days to weeks, low sample volumes are often sufficient, and samples tolerate chilling and transport — so a simple bottle or syringe filter usually does the job. eRNA is the opposite on every count. The molecule degrades in minutes, which means you need high water volumes to concentrate enough viable signal, and the sample must be preserved on-site immediately rather than chilled and shipped. That combination calls for active, pumped high-volume filtration paired with a preservation buffer — not standard grab-sample gear.

The practical upshot is simple: you cannot collect a valid eRNA sample with standard eDNA equipment. It requires a system built to push large water volumes through filtration quickly and "set" the genetic signal before it decays — which is precisely what the Osprey is engineered to do.

• Living-presence confirmation — distinguish active, viable organisms from residual or transported DNA, so a detection means something is actually here and alive.
• Functional activity insight — see not just which organisms are present but what they're doing: stress response, toxin-gene expression, metabolic activity.
• Near-real-time ecosystem readout — track how the biological community is responding to conditions, treatments, or restoration efforts as it happens.
• Paired eDNA + eRNA picture — combine the broad "who has been here" screen of eDNA with the live "who is active now" signal of eRNA for a complete ecological assessment.
• Decision-grade data for invasive species response, bloom risk and toxicity, endangered species monitoring, biosecurity, and restoration verification.