Movement patterns of Shark Bay Dugongs - GIS layer

Brief description

This dataset consists of location points obtained from GPS data loggers and Satellite Platform Transmitter Terminals (PTT) attached to dugongs to determine large and fine scale movement patterns within the Shark Bay World Heritage Property (SBWHP). The length of deployment for each animal ranges from 10 days to 11 months with all locations falling within the boundaries of the SBWHP.

Lineage

Maintenance and Update Frequency: notPlanned

Statement: - Dataset history - 1. Determination of dugong movement patterns within the SBWHP from GPS and satellite telemetry represents a first for the use of this technology in Western Australia. Methods for data capture and tag attachment developed by CALM in conjunction with members of the Shark Bay Yadgalah Aboriginal Corporation, James Cook University and Edith Cowan University. Full description of methods in Holley (2006). 2. Accumulated data has been obtained from three different types of location units attached to the tail flukes of dugongs. Satellite-monitored platform transmitter terminals 125 (PTT) and generation II combination GPS/PTT units .(Telonics, Mesa, Arizona). Geographical Positioning System (GPS) data loggers (Lotek Engineering Inc. Ontario, Canada). 3. PTT's are transmitter platforms which transmit signals at regular intervals which are received by Service Argos receivers aboard NOAA polar-orbiting environmental satellites. At least two satellites are simultaneously in service on sun-synchronous, polar, circular orbits at 850 km altitude, providing full global coverage. Locational accuracy is dependant on signal strength and satellite coverage. 4. Attributes recorded from the PTT units include: Location class, date, time-Western Standard Time and Lat/Long in milliseconds . 5. The GPS units each with an eight channel receiver, log a units position from pulses received from the navstar series of satellites. The GPS units can be user programmed to obtain a position at a rate of between 5min-6hours 6. Attributes recorded on the Lotek GPS units include: Lat/Long-in milliseconds, Date, Time-Western Standard Time, Temperature- Degrees Celsius. Attributes on the Telonics Gen II units include; Lat/Long-in milliseconds, date, Time-Western Standard Time, Temperature- Degrees Celsius. 7. An accuracy attribute is recorded against each location. 8. Deployment and retrieval dates for each unit type are listed below: PTT UNIT : DATE DEPLOYED : DATE RETREIVED 5519 : 22/03/2000 : 11/12/2000 5065 : 22/03/2000 : 05/04/2000 5534 : 23/03/2000 : 25/10/2000 5536(1) :23/03/2000 : 04/04/2000 5536(2) :06/04/2000 : 28/05/2000 5535 : 23/03/2000 : 23/10/2000 5537 : 22/03/2000 : 16/08/2000 1311 : 16/05/2001 : 01/07/2001 GPS UNIT: DATE DEPLOYED : DATE RETREIVED: FIX ACQUISITION RATE 8001 : 15/08/2000 : 05/10/2000 : 15 MINUTES 8002 : 16/08/2000 : 04/10/2000 : 15 MINUTES 8003 : 16/08/2000 : 03/10/2000 : 15 MINUTES 8004 : 17/08/2000 : 21/09/2000 : 15 MINUTES 8005 : 17/08/2000 : 01/10/2000 : 15 MINUTES 7301 : 18/09/2001 : 28/09/2001 : 20 MINUTES 7001 : 20/09/2001 : 28/09/2001 : 20 MINUTES 0803 : 21/03/2002 : 11/05/2002 : 15 MINUTES 0807 : 17/06/2002 : 25/07/2002 : 15 MINUTES 0606 : 18/06/2002 : 09/08/2002 : 15 MINUTES 0602 : 19/06/2002 : 04/07/2002 : 15 MINUTES 0603 : 20/06/2002 : 02/07/2002 : 15 MINUTES 1. Data are downloaded from the GPS tags in the datum WGS 1984 via a link unit, in a comma delimited file (.csv) Data are then converted into a text delimited file (.txt) and imported in Arcview and converted into shapefiles (.shp). For the PTT units, data are retrieved from service Argos in a spreadsheet format in the datum WGS 1984, then imported into Arcview in the same manner and converted into shapefiles.

Notes

Credit
Shark Bay Yadgalah Aboriginal Corporation

Credit
James Cook University (JCU)