S
ince 2008, the Gnaraloo Turtle Conservation
Project (GTCP) has conducted daily beach
track surveys, along with a variety of comple-
mentary research and monitoring activities, in the
Gnaraloo Bay Rookery between 1 November and
28 February each year. This high-density rookery
has been identified as being critical to the survival of
Loggerhead Turtles in the southeast Indian Ocean.
In 2011-12 additional surveys commenced in the
Gnaraloo Cape Farquhar Rookery. A total of 697
nesting activities and 355 nests were recorded
during the 2017-18 season.
Prior to 2008-9, foxes and feral cats and dogs were
responsible for widespread predation on turtle nests
within the survey area, and therefore control
measures formed an integral part of the overall
conservation strategy. These have proved so
successful that there has been no evidence of
predation by feral animals since 2010.
The Gnaraloo Bay Rookery is
critical to the survival
of Loggerhead turtles in the
southeast Indian Ocean.
Flipper tagging was added to the program during
the 2017-18 season. This enables identification and
tracking of females, and can reveal some interesting
information; for example, 11 females were observed
to lay multiple nests, with an average internesting
period of 16.1 days. Long-term flipper tagging is of
considerable value in determining population
dynamics, remigration intervals and recruitment
rates, and it is therefore essential that this work is
continued.
In another exciting development in season 2017-18,
two Loggerhead Turtles nesting at Gnaraloo were
fitted with satellite tracking devices. Both went on to
lay three more nests in the Gnaraloo Bay Rookery
and then began their long migration to foraging
habitat in the Gulf of Carpentaria, Queensland. The
first female, christened Gnargoo, took around three
months to complete her journey, travelling approxi-
mately 4,100 kilometres. The second, named
Baiyungu, joined her about six weeks later, having
swum close to 4,700 kilometres. Previous satellite
tracking has also revealed foraging grounds ranging
from Shark Bay (around 250 kilometres south of
Gnaraloo), all along the western coast of Australia,
north to Darwin. This demonstrates the need for
comprehensive and collaborative approaches to
turtle conservation, as it is vital that foraging
grounds are protected, in addition to nesting
beaches.
The Gnaraloo project is not confined to hands-on
conservation and research, as community engage-
ment has been a central focus since 2010-11.
During the 2017-8 season the GTCP directly