Notes
Please include Dave Boyle and Chatham Island Taiko Trust as data owners. Funding for use of these devices came from a grant from Wellington Zoo.
Data processing was achieved using the probGLS package in R (Merkel et al., 2016).
For flight speeds we used GPS-derived velocities from white-necked petrels (Pterodroma cervicalis; length 43 cm weight 450 g), a gadfly petrel of somewhat similar body-size to taiko (body length 38 cm weight 450 g, approximately 12.3% smaller). Derived average, standard deviation (sd) and maximum wet and dry velocities from white-necked petrels where, wet: mean 1 ± 1.3 sd (max = 5 ms-1), dry: mean 13.9 ± 5 sd (max = 27.75 ms-1; Halpin L. personal communication).
Model parameters: Value used
particle.number 1,000
Iteration.number 100
sensor As specified for each bird using the function: sst_deduction(datetime, temp = wetmean_c, temp.range = c(-2,40)) #mean wet temperature
tagging.date As specified for each bird
retrieval date As specified for each bird
trn As specified for each bird using the two below functions
1. twilightCalc(datetime, light, LightThreshold = 3.5, ask = FALSE, allTwilights = FALSE)
2. loessFilter(k = 3, plot = T)
act As specified for each bird
NOAA.OI.location File path of folder containing environmental data from NOAA (Reynolds et al 2007)
mean daily ice cover
land mask
mean daily sea surface temperature
Available from: https://www.esrl.noaa.gov/psd/data/gridded/data.noaa.oisst.v2.highres.html
tagging.location c(-44.0898637846113, -176.632384322584) location of colony
sunrise.sd twilight_error_estimation(shape = 2.49, scale = 0.94, delay = 0)
sunset.sd twilight_error_estimation(shape = 2.49, scale = 0.94, delay = 0)
range.solar c(-7,-1)
speed.dry c(13.9, 5, 27.75)
speed.wet c(1, 1.3, 5)
sst.sd 0.5
max.sst.diff 0.5
days.around.spring.equinox c(30,30)
days.around.fall.equinox c(30,30)
ice.conc.cutoff 0.001
boundary.box c(146, -60, -60, 10)
med.sea FALSE
black.sea FALSE
Baltic.sea FALSE
Caspian.sea FALSE
east.west.comp FALSE
wetdry.resolution 30
