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agonzalez

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Everything posted by agonzalez

  1. Hi all, I estimated stopover locations by using 0.1, 0.2, and 0.3 cutt-off prob. Results are quite consistent specially during the first part of migration. Can the 0.1, 0.2, and 0.3 values be translated into something more "meaningful"? Like km? I'm not quite sure how to explain these three values. Many thanks, Ana
  2. Hi Eldar, Thanks so much for your help. I'll be more conservative when using the graph resulting from "plot_slopes_by_location" to select my calibration periods. Any advice to deal with the outliers? Thanks again, Ana
  3. Hi everyone, I used FlightR to analyze seven tags from Thrushes tagged in South America and it worked pretty well. Now, I'm running a tag for a different Thrush species (I know this species migrates way slower than the first one) but the results don't seem to make sense. When I plot the results the bird is all over the map and the migratory path is like a zigzag. The light data is very clean, and I'm doing exactly what I did for the first species. Has anyone run into the same issue? I really don't know what to do to improve the results. Any advice will be appreciated. Thanks! Ana
  4. Hi Eldar, Thanks so much for your reponse! I think you're right, this bird was moving quite slow and that might be why I got strange results. I ended up using the results from "stationary.migration.summary" to help visualizing potential "long" stopover sites and then used "find.times.distribution" to determine arrival/departure from stopovers, wintering and breeding sites. I just run another bird that migrated way faster and got way better results from "stationary.migration.summary". For dates inferences I'll use "find.times.distribution" anyway as you suggested. I also notice that the dates we get are the median dates... Thanks again! Ana
  5. Hi Eldar, Thanks so much for your response. Here is my result object. Cheers, Ana https://www.dropbox.com/s/lk5gaj1mytv7elr/302_FLightR_results_1e6.RData?dl=0
  6. Hi everyone, I'm working with data from Thrushes I tagged in their wintering grounds in Colombia. I'm a bit confused with the results from the stationary periods and I'll appreciate if someone can give me some feedback. I attached the first table I got from: stationary.migration.summary(Result302_1e6, prob.cutoff = 0.1, min.stay = 3) Mi first question is why would I get a stationary period when the period of stay was 0 days. Like in periods 4 and 14 in the table. I got three periods during the breeding season (5,6,7). However the date of the three periods overlaps at some point. Here I'm not quite sure about the departure/arrival during those periods or length of stay. Any advice? When I plot the utilization distribution for the breeding grounds using the dates of period 5 I get two separated areas in the breeding grounds; one around period 5 and another around period 6 (north from 5). I believe this is because period 5 overlaps with period 6 but not sure what to do here... Many thanks! Ana Summary stationary periods_Thrush 302_July 11 2017_Ana Gonzalez.docx
  7. Hi everyone, I used "twilightCalc" to preprocess my .lux files and it worked beautiful for all my tags except one. From June 3rd to July 31st I cannot define day vs. night because the light levels are essentially the same. This bird is going so far north that basically there isn't' night; that's my guess. I'm not quite sure how to deal with these data. Should I exclude this period from my data? Any advice will be appreciated. Many thanks! Ana
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