This forum is for posting about topics that dont fit easily into the other categories. Including data management, programming, tips, tricks, general help, suggestions about R Ornithology, upcoming meetings, or sharing projects
This forum is for posting about package specific questions that dont fit into graphing or mapping topics (ex: tidyr, RMark, R2jags). Feel to start threads on broad topics like 'dplyr' or RMark' and nest questions with in that thread.
I am currently helping a friend to analyse data from mottled petrels breeding on Codfish Island, South of New Zealand. She used migrate technology tags, the same model (C-250) as I used on skua. Her light data looks very clean and she has a few days of 'rooftop' callibration from the study site. When running the model, it always comes out with a track that makes sense given what is known from previous tracking of the species. However, there are no confidence areas displayed on the lat lon graph (looking at the data, Min.lat, Max.lat and Medianlat/Lon values are all the same for each location). Switching "known last" to False makes them appear in the very end of the track, but they are still missing for the rest. We have tried different individuals, but the problem persists. I also tried using a calibration from my skua data (Chatham Islands), but the same problem occurs. Have you had a similar problem before, and do you think it could be due to issues with the callibration?
I would be very thankful for any suggestions. Thanks a lot in advance!
All the best,
UPDATE: I have tried doing the calibration from onbird data as estimated by the 'plot_slopes_by_location' function. This now results in confidence intervals on the tracks throughout. Could it be that the onbird data is simply better suited in this case? Many thanks in advance! Hendrik
The deadline to submit applications for 2019 Native American Research Assistantships has been extended to Dec. 1. To apply, please download an application form.
Research projects currently slated to be available for 2019 assistantships include:
Assessment of camera trap surveys to estimate wild pig and white-tailed deer density
Bat surveys and greater sage-grouse vegetation studies in the Buffalo Gap National Grassland of South Dakota
Bioacoustic surveys for owls in Oregon’s Coast Range
Evaluating restoration treatments to promote flora and fauna important to the Washoe Tribe
This program is facilitated by The Wildlife Society and the U.S. Forest Service, a Premier Partner of TWS.
Read more about this year’s program and application process here (http://wildlife.org/apply-now-usfs-native-american-research-assistantship/).
The Alliance for Zero Extinction has mapped 1,483 highly threatened species that are only found at a single site. This major new assessment highlights the urgent need for better protection of these irreplaceable locations.View the full article
Researchers have discovered that daily nest predation of shorebirds has increased threefold over the last 70 years. The data suggest the larger increase in the Arctic relative to the tropics indicates a link to climate change.
View the full article