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Loggerhead Turtle Tracking Data
loggerhead.Rd
Data used in MARSS vignettes in the MARSS-package
. Tracking data from ARGOS tags on eight individual loggerhead turtles, 1997-2006.
Format
Data frames "loggerhead" and "loggerheadNoisy" contain the following columns:
- turtle
Turtle name.
- day
Day of the month (character).
- month
Month number (character).
- year
Year (character).
- lon
Longitude of observation.
- lat
Latitude of observation.
Details
Data frame "loggerhead" contains the original latitude and longitude data. Data frame "loggerheadNoisy" has noise added to the lat and lon data to represent data corrupted by errors.
Source
Gray's Reef National Marine Sanctuary (Georgia) and WhaleNet: http://whale.wheelock.edu/whalenet-stuff/stop_cover_archive.html
Examples
str(loggerhead)
#> 'data.frame': 291 obs. of 6 variables:
#> $ turtle: Factor w/ 8 levels "BigMama","Bruiser",..: 1 1 1 1 1 1 1 1 1 1 ...
#> $ day : int 28 28 29 30 31 2 3 4 5 5 ...
#> $ month : int 5 5 5 5 5 6 6 6 6 6 ...
#> $ year : int 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 ...
#> $ lon : num -81 -80.7 -81 -81 -81 ...
#> $ lat : num 31.9 31.6 31.9 31.8 31.9 ...
str(loggerheadNoisy)
#> 'data.frame': 557 obs. of 6 variables:
#> $ turtle: Factor w/ 8 levels "BigMama","Bruiser",..: 1 1 1 1 1 1 1 1 1 1 ...
#> $ month : int 5 5 5 5 6 6 6 6 6 6 ...
#> $ day : int 28 29 30 31 1 2 3 4 5 6 ...
#> $ year : int 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 ...
#> $ lon : num -81.5 -80.9 -81.3 -81.6 -81.4 ...
#> $ lat : num 31.7 32.2 31.7 31.8 32.1 ...