Friday, 30
December 2011
Late start to
the day, we were in no hurry today as we knew we would be staying up
very late.
There were a few
things to do around the camp: washing, mending equipment, general
tidying up to allow for a hassle-free departure the following
morning.
After a late
lunch and an afternoon nap we headed over to Mon Repos just after
18:00 (6:00PM).
Lots of people
were already queuing, lots more were still arriving as we were taking
in the atmosphere and a cup of coffee from Robby's “Vantastic
Food” outlet outside the Mon Repos Information Centre.
Eventually the
gate was opened and visitors were welcomed into the centre after
checking their respective booking details. Tonight's turtle encounter
was fully booked. When we were handed our numbered stickers we found
out that we were in group 4 – it would be a long night for us as
group 1 was to be led onto the beach first and turtles weren't
expected to emerge from the sea before 21:00 (9:00PM).
In the
amphitheatre outside we watched an introductory film on turtle
research and conservation at Mon Repos. 95% of the female turtles
that come on the beach over night for breeding are Loggerhead Turtles
(Caretta caretta), an endangered species. If we were going to
see a turtle tonight, it would be a loggerhead.
Shortly after
21:00 (9:00PM) the first group was called to assemble at one of the
boardwalks that lead onto the beach, the first turtle had emerged!
A little while
later Flip had the opportunity to join Mon Repos' junior ranger
program.Flip and the other children got an insight into turtle
research and filled in a data collection sheet after carefully
examining the fibreglass model of an egg-laying loggerhead.
Outside we
listened to another talk on the characteristics of Loggerhead
Turtles, particularly their breeding pattern and quite extraordinary
life cycle, all preparing us for the real life encounter.
Then it started
to rain. In between showers Shane, the QPWS ranger in charge of the
night, was receiving radio calls from turtle-spotting staff based on
the beach, researchers and volunteers. He would then go on to
assemble groups and send them onto their way into the night.
Eventually, at
23:15 (11:15PM) it was our turn.
Group 4 met at
the gate to the northern boardwalk. Instructed not to turn on any
lights we shimmied down the sloped boardwalk, slippery with rain and
sand, onto the beach in complete darkness. The moon had set already,
the stars were obscured by clouds.
Once on the
beach we waited for a few minutes only to be told by our guide Shane
that we had to return to the information centre.
The turtle our
group had been assigned to had changed her mind and gone back in the
water.
But a short time
later we made our way down the wooden planks again and we were led to
a site a few hundred metres north. We could see a few lights up there
as we were walking through the sand, the rain becoming stronger once
again.
The turtle had
already completed laying her eggs when we arrived at her nesting site.
Bummer...we
thought...
But there were a
couple of reasons why the rangers hadn't called us in earlier, why
they didn't want too many people around this turtle too early in the
night.
This particular
female Loggerhead Turtle had been on the beach the previous night.
But something had spooked her and she'd decided to do a U-turn and
swam out into the dark again.
So when she emerged again tonight, they wanted to make sure everything went to plan.
So when she emerged again tonight, they wanted to make sure everything went to plan.
Loggerheads dig
their nests above the high water mark, up in the dunes where the sand
is soft and doesn't get inundated in the event of a storm surge.
They usually
clear any grass and debris from their chosen site and dig a body pit
before they proceed with the digging of the egg chamber, up to 60cm
deep, by use of their rear flippers – the hard yakka.
Our turtle (who
is easily identified by the tag number on her flippers) is known to
have a “glitch” in her nesting sequence, this complex set of
instinctive behaviour embedded in a turtle's DNA.
She digs the body
pit – but then she skips the crucial part of of digging the deeper egg
chamber!
In order to improve the survival rate of her offspring
Barry and a couple of other volunteers had helped her out by digging
the hole for her, right under her stubby little tail, so her eggs
would drop into the safety of a sufficiently deep egg chamber. She had already
started to fill in the hole again when we appeared on the scene.
This is the time of night when
photos of nesting turtles can be taken without causing too much of a
disturbance.
Our guide,
very knowledgeable and truly passionate, provided us with information on this
turtle lady.
She was tagged
when she first emerged from the South Pacific in the year 2002. After
her “lost years”, the 30-35 years between hatching and reaching
sexual maturity, she'd found the beach with help of her inbuilt GPS
that recognises the Earth's magnetic fields. Since then she has returned to the scene every second year.
Tonight she
actually laid her second clutch of eggs for the season, over 100. And
she may even return in a couple of weeks for a third clutch.
About 8 weeks
from now this clutch will hatch, baby turtles will work their way
through the sand – and in the cover of night they will make a mad
dash for the water.
Some of the
hatchlings will have their DNA samples taken to determine how many
different male turtles contributed their sperm to the hatchlings of
this clutch.
After obscuring
the nest, she started to make her way back to the water. For a moment
she wandered in the wrong direction but after we'd all turned off our
lights and cameras, she found her way back down to the waves, guided
by only Shane's torch light. And then she was gone, swallowed up by the sea.
We didn't
encounter any other turtles on our way back to the information
centre. We were soaked with rain. We had an unforgettable night.
Boh boh!
Anja
Anja