Should caterpillar frass samples be oven-dried before taking mass measurement?

16 June 2023 1 4K Report

I have several hundred frass samples collected over the spring season to estimate woodland caterpillar phenology - should they be oven-dried to remove moisture content before sorting frass vs non-frass (leaf litter etc) and taking measurement of frass mass? If so, what temperature and how long? Literature varies between not dried at all, air-dried, and oven drying for durations 6hr, 24hr, 48hr at temps 50-70 degrees C

Andrew Paul McKenzie Pegman

Usually 50 to 70 C until there is no further change in weight :)

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