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Baiyungu - Western Australian Loggerheads - Gnaraloo Bay and Gnaraloo Cape Farquhar 2015-2018

A project of Gnaraloo Wilderness Foundation.

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"Baiyungu" is an Aboriginal language group from the Gnaraloo-Ningaloo area.
One of the language speakers says there is no word for loggerhead or hawksbill turtles as they were not to be eaten.
These are some of their words to do with sea turtles:
Green sea turtle – majun
Young female – gurlgi
Old female jandira
Young male – wirda wirda
Old male – burlganja
Turtle eggs – gawangka

1) Baiyungu was found in the Gnaraloo Bay BP8-BP9 sector on the night of 8th December 2017 and after filling in her nesting chamber, was restrained by the portable turtle box being assembled around her.
She measured 93.5 cm.
She was given:
Front Left flipper tag - WB15140
Front Right flipper tag - WB15141
Carapace Rear - the letter "B"
Carapace Front - Wildlife Computers "SPOT 6" ARGOS satellite tracker ID number 158487
Skin Biopsy No. F6404 was collected by the Gnaraloo team for later DNA and Stable Isotope analysis by the WA DBCA Marine Science division.

After release she stayed close to her Gnaraloo Bay nesting beach until 11th December, when she moved 20 km north to the reef adjacent to the Gnaraloo Cape Farquhar nesting beach.

She remained around here until the night of 22nd December when she returned to near her first nest site at Gnaraloo Bay, in preparation for re-nesting.

2) She attempted a re-nest between 8pm and 9pm on 24th December and later that night re-nested within 1 km of her first nest site on between 2:30am and 4:10am.

This was a 16 day re-nesting interval.

On the night of the 27th December she swam back north to Cape Farquhar for the inter-nesting period to develop her next clutch of eggs.

3) She returned to Gnaraloo Bay on 6th January and nested on the night of the 7th, heading north to Cape Farquhar Bay again on the afternoon of the 8th January 2018.

This was a 14 day re-nesting interval.

4) She returned to Gnaraloo Bay on 21st January and nested on that night. She was found emerging from the water by the Gnaraloo Turtle Team at 21:20 and they watched while she dug her body pit and egg chamber, and laid 119 eggs. Immediately after filling in her nest she went north again to Cape Farquhar Bay for her inter-nesting period.

This was a 14 day re-nesting interval.

She returned the next day to Cape Farquhar Bay, stayed for 7 days, and then decided she had no more clutches to lay and began her homeward migration, heading north on 29th January.

She passed by Coral Bay and Cardabia Station on the 31st, and Exmouth on 4th February, and began heading eastwards along the NW Australian coast, at about 40km per day, staying within 20km of the shore.

  • The presentation of data here does not constitute publication. All data remain copyright of the project partners. Maps or data on this website may not be used or referenced without the explicit written consent of the data owners.
  • For more information please visit the project website.
  • This map connects positions generated by the ARGOS system designated as location class (lc) '4', '3', '2', '1', '0', 'A'. Locations that have been "filtered" are displayed as small red dots.
  • This maps also shows locations of class 'B' as small black dots which are not connected by a route line.
  • Bathymetry layers are derived from the GEBCO One Minute Grid.
  • Sea surface temperature and chlorophyll are derived from NASA's Ocean Color data.
  • Ocean currents and sea surface heights are derived from AVISO's Ssalto/Duacs Gridded Absolute Dynamic Topography & absolute geostrophic velocities data.

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