| Summary: | These data comprise locations and dive metricsfrom 19 adult Weddell seals ( Leptonychotes weddellii ) instrumented in February 2011 with telemetry devices. These devices were Sea Mammal Research Unit Conductivity-Temperature-Depth Satellite Relay Data Loggers. These are animal-attached loggersthat are manufactured and programmed by the Sea Mammal Research Unit Instrumentation Group at the University of St Andrews, Scotland. Ethical approval for this work was obtained from the University of St Andrews Animal Welfare and Ethics Committee, and from the corresponding committee at the British Antarctic Survey. This dataset is linked to the manuscript Photopoulou et al. 2020 "Sex-specific variation in the use of vertical habitat by a resident Antarctic top predator"Proceedings of the Royal Society B (http://dx.doi.org/10.1098/rspb.2020.1447) and a preprint on bioRxiv (https://doi.org/10.1101/2020.06.15.152009). The data are structured in long format, so that each row in the dataset represents an observation. The columns in the data are as follows. ID: This a factor variable identifying eachindividual seal. It has 19 levels. sex: This is a character variable identifying the sex of the seal, either "F" or "M" for female and male. source: This is a factor variable identifying the type of record. It has three levels "dv", "ho" and "sf" for dive, haulout and surface record respectively. start_date: This is a date variable (POSIXct) that gives the date and time of the beginning of an observation in UTC time. end_date:This is a date variable (POSIXct) that gives the date and time of the end of an observation in UTC time. local_start_date: This is a date variable (POSIXct) that gives the local date and time of the beginning of an observation at the geographic location of the seal. end_end_date:This is a date variable (POSIXct) that gives the local date and time of the end of an observation at the geographic location of the seal. fg_lon: This is a numeric variable and gives the longitude of the seal at the local end time of ...
|
|---|