crocs: Passive Acoustic Monitoring of Saltwater Crocodiles

In VTrack: A Collection of Tools for the Analysis of Remote Acoustic Telemetry Data

Description

This VEMCO dataset contains the relocations of 3 saltwater crocodiles monitored between 09 September 2008 to 31 December 2008 on the Wenlock River, Cape York, Queensland, Australia. Data supplied H. Campbell from the School of Biological Sciences, The University of Queensland, Queensland, Australia.

Usage

data(crocs)

Format

A data frame with 11229 observations on the following 14 variables.

Date.Time

a vector of type POSIXct in Co-ordinated Universal Time (UTC)/ Greenwich Mean Time

Code.Space

a character vector containing the type of coding scheme used for the particular tag type. This unique identifier encompasses all the information required for a receiver to detect and decode that particular transmitter (e.g. A69-0001 is an acoustic transmitter operating at a frequency of 69Hz and has 0001 as a unique number identifier).

ID

a numeric vector giving the identity of each transmitter, 94,99,139,138

Sensor.1

a numeric vector giving the value of the environmental sensor such as temperature or depth at the time of detection

Units.1

a factor with levels m and degrees C

Sensor.2

as this study included coded tags only, no environmental sensor data are present in this vector

Units.2

as this study included coded tags only, no sensor units are present in this vector

Transmitter.Name

a character vector containing user defined animal names

Transmitter.S.N

a numeric vector containing the factory assigned transmitter serial number

Receiver.Name

a factor specifying the unique identity of each receiver according to their model and serial number. i.e. VR2W-103548

Receiver.S.N

a numeric vector containing the factory assigned receiver serial number i.e. 1035481

Station.Name

an optional character vector specifying the user-defined location for a particular deployment. This is usually assigned and recorded in the receivers memory in VUE before receiver deployment. Multiple receivers may be associated with the same station name.

Station.Latitude

a numeric vector containing the location's latitude in decimal degrees

Station.Longitude

a numeric vector containing the location's longitude in decimal degrees

Details

The coordinates are given in decimal degrees WGS 84, time is GMT +10 hrs

Source

www.uq.edu.au/eco-lab/V-Track

Examples

#load the data and print the first few rows of the data frame
data(crocs)
head(crocs)

Example output

Loading required package: foreach
            Date.Time Code.Space  ID Sensor.1 Units.1 Sensor.2 Units.2
1 2008-09-01 00:00:48   A69-1105 139     0.20       m       NA      NA
2 2008-09-01 02:49:23   A69-1105 139     0.00       m       NA      NA
3 2008-09-01 03:02:51   A69-1105 139     0.20       m       NA      NA
4 2008-09-01 03:14:18   A69-1105 139     0.20       m       NA      NA
5 2008-09-01 03:27:18   A69-1105 139     0.20       m       NA      NA
6 2008-09-01 03:35:18   A69-1105 139     0.08       m       NA      NA
  Transmitter.Name Transmitter.S.N Receiver.Name Receiver.S.N Station.Name
1  Jack-o-saurus D         1057130   VR2W-103551       103551           NA
2  Jack-o-saurus D         1057130   VR2W-103551       103551           NA
3  Jack-o-saurus D         1057130   VR2W-103551       103551           NA
4  Jack-o-saurus D         1057130   VR2W-103551       103551           NA
5  Jack-o-saurus D         1057130   VR2W-103551       103551           NA
6  Jack-o-saurus D         1057130   VR2W-103551       103551           NA
  Station.Latitude Station.Longitude
1               NA                NA
2               NA                NA
3               NA                NA
4               NA                NA
5               NA                NA
6               NA                NA

VTrack documentation built on May 2, 2019, 9:16 a.m.