3 ms·
Right, if you're measuring long enough that predators eating some of the flies could be an issue, then you'd want to mark them with something only visible under
by m12k 5y ago
Right, if you're measuring long enough that predators eating some of the flies could be an issue, then you'd want to mark them with something only visible under a blacklight, or similarly "neutral", so it doesn't introduce a bias.
- Woberto 5y agoUnless the predator can see in the UV spectrum, like bats
- marcosdumay 5y agoIf predators or age (or moving out or into the measured area) are a factor, they are already biased and keeping your method neutral will still give you very wrong results.