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Satellite tracking: an example
Brief notes on Sea Turtle Migration and Navigation
A full understanding of how young sea turtles travel reliably from their nesting
beach to their nursery areas and how they can keep in favourable areas for development
is now more fully understood although many questions remain unanswered. In young
loggerheads, orientation during migration appears to be dependent upon sequential
visual, wave and magnetic cues. Once the young turtles have arrived in their
nursery areas, magnetic earth fields may play an important role in positioning
and orientation: this possibly helps to keep the young turtles within favourable
areas vital for their successful growth, development and survival.
Exactly how adults navigate is still
unknown although mechanisms used by hatchlings may also apply to adults. The
fact that hatchlings have been shown to respond to magnetic fields suggests
that adults can also use this information to navigate and follow geometric maps
and return successfully to natal beaches after complex and sometimes lengthy
migrations.
Further
resources:
Status
of the Sea Turtles in the Gulf of Naples and preliminary study of Migration.
Press
Release No.2 16/04/97
Brief
notes on migration in Sea Turtles.
Brief
notes on satellite tracking methods.
The "Paola"
project.