Results of a bait trial testing predation in four vertical strata

Data from a 2007 field study in the Morgan Arboretum, Ste-Anne-de-Bellevue, Québec. Associated with a published paper (https://peerj.com/articles/138/). This is a data file of 9 columns and 168 rows. Column information is as follows: Tree = tree identity, 21 mature sugar maples were used Stratum = vertical stratum of the branch used for the trial, including: UN - understory; LC = lower canopy; MC - mid canopy; UC - upper canopy Note that five mealworm baits were pinned to the branch in each stratum, and that baits were checked a total of four times over 150 minutes. The first observation was recorded after 60 minutes, and each successive observation was taken 30 minutes after the previous one. Baits were also checked after an overnight period. totpred = number of mealworm baits that were predated during the four observation periods notpred = number of mealworm baits not predated during the four observation periods t.1st = time (in number of observation periods) till first observed predation on a bait on that branch maxpred = maximum number of predators observed during one observation period on that branch p.rmvd = proportion of baits removed after overnight period rmvd = number of baits removed after overnight period left = number of baits left after overnight period